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Christianity Crusades
Why was the third crusade famous in history? What did it aim to accomplish? Who was Saladin, how did the crusade build or tarnish his reputation
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Enzymes
(1) Be able to describe how Benedict's test can be used to detect the presence of reducing sugars (2) Be able to describe ...
Enzymes
(1) Be able to describe how Benedict's test can be used to detect the presence of reducing sugars (2) Be able to describe how enzymes, like Invertase, ...
Biology Lab Report.
I would like to ask for a biology lab report which includes all of the following sections; introduction, methods, results, ...
Biology Lab Report.
I would like to ask for a biology lab report which includes all of the following sections; introduction, methods, results, discussion, and completing the hypothesis work sheet. Thanks!
Non-Concordist Interpretations Discussion Questions
Question 1Non-Concordist Positions - Strengths & WeaknessesChapter 6 of the Origins text discusses five different non-conc ...
Non-Concordist Interpretations Discussion Questions
Question 1Non-Concordist Positions - Strengths & WeaknessesChapter 6 of the Origins text discusses five different non-concordist positions about creation. A non-concordist positionassumes that the Bible is true and that the Bible teaches that God created all things, but that the Bible is not teaching a science lesson of the time sequence order of how God created all things.Question 2How does the Blessed Man of Psalms 1–2 compare to Joshua?500–750 wordsLearning Module 6 (week 6)Your first sentence needs to state your thesis in a complete sentence.The rest of your post needs to defend your thesis with evidence from the reading or other sources.Please footnote any sources from which you borrow ideas, thoughts or concepts, including the textbook.Please use quotations marks and a footnote from any sources from which you borrow actual words.Please keep your quotes from a source as small. They should not be more than a sentence.Please write with complete sentences.Please make sure that the subject and the verb of each sentence agree.Please use only one verb tense (past or present) in your post.Please have transitions between sentences, especially within the same paragraph.You will only be able to read other posts if you first submit your own post.Do not use contractions or other aspects of an informal writing styles.Do not use texting or tweeting abbreviations (LOL, BTW, etc.)Use a formal writing style.
BIO 120 Grossmont College Lack of A Vascular System Limit the Size in Which the Plant Can Grow Lab Report
Hi there, you might see many question but you they are easy to answer because all of them are found in the internet also I ...
BIO 120 Grossmont College Lack of A Vascular System Limit the Size in Which the Plant Can Grow Lab Report
Hi there, you might see many question but you they are easy to answer because all of them are found in the internet also I will provide a PDF that you can read and get the answers from. NOTE: If you want to look on the internet to find answer please change them into your own words that it doesn't seem it is copied or plagiarized because my instructor is so smart and can know if we are copying. It should not take a long time to answer because all answers are online.The PDF for this assignment is on canvas and I will provide the log in info once you bid to my question.Link: https://gcccd.instructure.com/login/canvasCritical thinking question: Be able to explain why a moss plant cannot grow large. How does the lack of a vascular system limit the size in which the plant can grow? Put your answer here:Critical thinking question: Be able to explain the advantages of a seed over a spore in the following circumstance: Both a seed and spore land on the ground but leaf litter prevents either of them from direct contact with the soil. The seed grows into a plant while the spore perishes. Explain why:Critical thinking question: All life forms on earth produce offspring by a process that is usually called sexual reproduction. In some, asexual reproduction occurs for a time, but is always followed by sexual reproduction. In asexual reproduction the result are offspring that are exactly the same as the original… they are said to be clones. This form of reproduction has major disadvantages to the species when the environment changes dramatically. Sexual reproduction, on the other hand, produces offspring that are not identical to either of the parents because they a mixture of both parent’s genes.What are the disadvantages of offspring produced by asexual reproduction when the environment changes and, in contrast, what are the advantages of offspring produced by sexual reproductionwhen the environment changes?Put your answer here:Question 1. Describe the size difference in seeds and spores and try to explain why one is larger than the other.Table 1. Numbers of Flower Parts in Gladiolus and SnapdragonGladiolusSnapdragonCount these flower parts:Sepals: (these are modified leaves) are the outermost (usually green) structures of the flower.Petals: Notice that the snapdragon flower has some of its petals "fused" together (a result of evolutionary adaptation). Ask your instructor to show you this.Stamens: Be sure to distinguish these from the pistil and do not include the pistil in your count.Pistil: Examine the tip of the stigma: how many parts can you see?Ovary: carpel chambers. Count the number of chambers in the ovary. (Observe a cross-section through the dissecting microscopes at the front of the classroom. Turn on the light(s) and remove the watch glasses covering the specimens to observe. Replace the watch glasses and turn off the lights when you are done.) Question 2. Typically, monocots have flower parts which number in "threes" or "multiples of three." Based on your observations, which of the above plants is a monocot? Question 3. Dicots usually have their flower parts in "fours" or "fives", or some "multiple" thereof. Based on your observations, which of the above species is a dicot?Question 4. Estimate the size of pine, hemlock, and sweet gum pollen, in microns. Question 5. What kinds of organisms are likely to functions as helpers in the pollination process? Question 6. The evolution of flower structure and color is thought to reflect natural selection for more efficient pollination mechanisms. Given that different colors and scents might attract different pollinators, suggest how the odd shape of the snapdragon flower might help the pollination process.Question 7. Conifers and Cycads are wind pollinated. (Note: some Flowering plants (e.g. grasses) no longer have colorful flowers because they have reverted back to using wind for pollination.) Describe a few characteristics you would expect to see in wind-pollinated plants vs. animal-pollinated plants. After pollination, the pollen grain (male gametophyte) germinates, and the pollen tube grows through the tissue of the style to the ovary and enters the ovule where an egg is fertilized. Question 8. It is known that many organisms, or parts of organisms, grow toward or away from various stimuli, such as light, chemicals, gravity, and so forth. Consider what you know about flowers and suggest a likely mechanism that might direct the growth of the pollen tube toward the ovules. Question 9. One of these seeds should separate easily into two equal halves, called cotyledons. Plants with seeds having two cotyledons are called dicotyledons, or "dicots" for short. Of the seeds you examine, which plant is a dicot?Question 10. Those plants whose seeds do not so easily separate and have only one cotyledon are the monocotyledons, or "monocots" for short. Which plant is a monocot?Question 11. How many chambers do the ovaries of the tomato and the green pepper have? Are they monocots or dicots? Question 12. What other plant foods that we eat are commonly called vegetables, but are actually fruits, like the tomato? Give several examples.Question 13. Does the gladiolus have parallel or net veined leaves? Go online to answer this question. Question 14. Do the snapdragons have parallel or net veined leaves? Go online to answer this question.Question 15. In the space below, make you own sketch of a small section of leaf epidermis; include two stomata with their guard cells.Label all parts.Question 16.Which cells of the epidermal layer contain chloroplasts? What do you know is the function of the stomata and guard cells? How do you think the chloroplasts in the guard cells relates to this function? Question 17. Observe the cross section above. In the space below, sketch a small section of the Syringa (lilac) leaf cross section. See Figure 4, the charts in the lab, or the Internet for help. Label the following:cuticle, upper and lower epidermisstoma and guard cellspalisade mesophyll cells and spongy mesophyll cellsvascular tissue (veins, which include xylem and phloem)intercellular space.Question 18.What function do you think the palisade and spongy mesophyll tissues provide for the plant?What do the stomata do for the intercellular spaces in the mesophyll tissue?Why do you suppose that the guard cells have chloroplasts while the other epidermal cells do not? Question 19. Which plant, grass or geranium, has parallel veins in its leaves? Is this plant a monocot or a dicot? (use the internet)Question 20. Which plant has a net-like pattern in its leaves? Is this plant a monocot or a dicot? Question 21. Are these dots parts of structures which extend lengthwise through the stem?Question 23. Dicotyledons have vascular bundles in a ring. Which plant is a dicot?Table 2. Comparison of Monocot and Dicot Characteristics CharacteristicMonocot Example monocot observedDicotExample monocot observedflower parts: most common multiple (3's vs. 4's & 5's)? number of cotyledons in the seeds? type of leaf veins (net vs. parallel?) vascular bundles (scattered vs. ring?) Question 24. In the Grossmont College Wildlife Sanctuary, a chaparral community, the native silverback fern thrives. During what time of the year would you expect this fern to produce gametophytes (Look at the typical plant life cycle) ? Why? This question is about logic, not actualy going out and looking)Question 25. For the sperm of one gametophyte to successfully find its way to the archegonium of another gametophyte, certain environmental conditions must be present. Name some of these:Question 26. Both the sperm and the egg of the fern plant have the haploid (1n) number of chromosomes. Describe the chromosome number of the zygote (the fertilized egg). Using the wall chart in the lab and Figure 4, put the following labels on the diagram below (Structures 1-6): sporophyte spores, sporangia, sorus gametophyteFor sporophyte and gametophyte generations be able to indicate whether it is diploid (2n) and which is haploid (1n).Be able to indicate in which structures meiosis occurs.
DEP 2004 Rasmussen College Human Growth & Development Discussion
Explain the positive and negative aspects of the living arrangements for the elderly listed below. Be sure to thoroughly e ...
DEP 2004 Rasmussen College Human Growth & Development Discussion
Explain the positive and negative aspects of the living arrangements for the elderly listed below. Be sure to thoroughly evaluate each option.Living in own homeLiving with their childrenAssisted living facilityNursing home with intermediate careNursing home with skilled nursing care and make recommendations for healthy and disabled elderly
Conversion method - moles and atoms
1. Write out conversion factors between the moles of each element and the moles of the compound C5H122. Write out the conv ...
Conversion method - moles and atoms
1. Write out conversion factors between the moles of each element and the moles of the compound C5H122. Write out the conversion factor of the given element in the given compound using the mass percent compositiona) Carbon dioxide is 27.19% carbon by massb) Butane is 17.34% hydrogen by massc) C6H8O7 is 58.29% oxygen by massThe Mole Concept3. How many moles of atoms are in the following?a) 8.22 x 1024 As atomsb) 4.41 x 1022 Ne atomsc) 6.77 x 1023 Li atomsd) 2.10 x 1021 S atoms4. How many atoms are in the following given numbers of moles of an element?a) 0.994 mol Fb) 4.39 mol Src) 9.1 x 10-3 mol Bd) 13.8 mol Cl5. Complete the table:6. Calculate the mass in grams of the following:a) 4.45 x 1019 Ag atomsb) 5.50 x 1024 Bi atomsc) 2.08 x 1021 Se atomsd) 7.31 x 1024 Ar atoms7. Calculate the number of atoms in each of the following:a) 14.8g Alb) 3.98g Cac) 1.90g Cod) 26.7g S8. Complete the table:9. Calculate the mass of the following in grams:a) 6.10 mol carbon monoxideb) 0.364 mol sulfur hexafluoridec) 4.44 mol potassium hydroxided) 1.71 mol lithium nitrate10. Complete the table:11. Calculate the number of molecules of the following:a) 13.2g SO2b) 9.03g CH4c) 0.00888g H2d) 157g LiBr12. A sample of C6H6 has a mass of 15ng. Calculate the number of formula units.Chemical Formulas as Conversion Factors13. Calculate the number of moles of O in the following:a) 11.4 mol CO2b) 0.761 mol H2Oc) 4.08 mol N2O5d) 0.302 mol HNO314. How many moles of H are in 1.85 mol [Cr(OH2)5Cl] Cl•H2O?15. Calculate the mass in kg of the following which each contain 3.5 x 102 kg of lithium.a) Li2SO4b) LiOHc) LiBr16. Which of the following contains the greatest number of moles of oxygen? Show all work.a) 3.03 mol C2H6O2b) 16.9 mol N2O3c) 8.27 mol Sr(NO3)2d) 0.0180 mol BaSO4Mass Percent Composition17. A 8.91g sample of an organic compound is found to contain 3.34g C, 0.98g H, 2.61g O, and 1.98g N. Determine the mass percent of each element.18. BaSO4 is approximately 58.84% barium by mass. Calculate the mass of barium in grams in a 7.22g sample of BaSO4.19. Calculate the mass percent composition of oxygen in the following compounds.a) CrO3b) SO2c) NaOHd) Al2(SO4)320. Calculate the mass percent composition of all the individual elements in each of the following compounds.a) HClO3b) AgBrc) PbSO4d) CH4Calculating Empirical Formulas21. An organic compound is found to have 36.03g of carbon, 6.048g hydrogen, and 16.00g oxygen. Determine the empirical formula of the organic compound.22. The nonsteroidal anti-inflammatory drug Ibuprofen consists of 75.69% carbon, 8.80% hydrogen, and 15.51% oxygen. Determine the empirical formula of ibuprofen.Calculating Molecular Formulas23. Determine the molecular formula of each of the following using the given empirical formulas and total molar masses.a) CO2H, 225.09g/molb) CClN, 184.41g/molc) C2H3O, 86.09g/mold) C4H8O, 144.21g/molChallenge Problems24. How many ethanol molecules are in a 613mL container of pure ethanol? Ethanol has a density of 0.7893 g/cm3.25. Aldrin is an insecticide that was commonly used in soil fields until it was banned in many counties. It is found to consist of 39.50% carbon, 2.21% hydrogen, and 58.29% chlorine. Its molar mass is 364.884g/mol. Using this information, determine the molecular formula of Aldrin.
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Enzymes
(1) Be able to describe how Benedict's test can be used to detect the presence of reducing sugars (2) Be able to describe ...
Enzymes
(1) Be able to describe how Benedict's test can be used to detect the presence of reducing sugars (2) Be able to describe how enzymes, like Invertase, ...
Biology Lab Report.
I would like to ask for a biology lab report which includes all of the following sections; introduction, methods, results, ...
Biology Lab Report.
I would like to ask for a biology lab report which includes all of the following sections; introduction, methods, results, discussion, and completing the hypothesis work sheet. Thanks!
Non-Concordist Interpretations Discussion Questions
Question 1Non-Concordist Positions - Strengths & WeaknessesChapter 6 of the Origins text discusses five different non-conc ...
Non-Concordist Interpretations Discussion Questions
Question 1Non-Concordist Positions - Strengths & WeaknessesChapter 6 of the Origins text discusses five different non-concordist positions about creation. A non-concordist positionassumes that the Bible is true and that the Bible teaches that God created all things, but that the Bible is not teaching a science lesson of the time sequence order of how God created all things.Question 2How does the Blessed Man of Psalms 1–2 compare to Joshua?500–750 wordsLearning Module 6 (week 6)Your first sentence needs to state your thesis in a complete sentence.The rest of your post needs to defend your thesis with evidence from the reading or other sources.Please footnote any sources from which you borrow ideas, thoughts or concepts, including the textbook.Please use quotations marks and a footnote from any sources from which you borrow actual words.Please keep your quotes from a source as small. They should not be more than a sentence.Please write with complete sentences.Please make sure that the subject and the verb of each sentence agree.Please use only one verb tense (past or present) in your post.Please have transitions between sentences, especially within the same paragraph.You will only be able to read other posts if you first submit your own post.Do not use contractions or other aspects of an informal writing styles.Do not use texting or tweeting abbreviations (LOL, BTW, etc.)Use a formal writing style.
BIO 120 Grossmont College Lack of A Vascular System Limit the Size in Which the Plant Can Grow Lab Report
Hi there, you might see many question but you they are easy to answer because all of them are found in the internet also I ...
BIO 120 Grossmont College Lack of A Vascular System Limit the Size in Which the Plant Can Grow Lab Report
Hi there, you might see many question but you they are easy to answer because all of them are found in the internet also I will provide a PDF that you can read and get the answers from. NOTE: If you want to look on the internet to find answer please change them into your own words that it doesn't seem it is copied or plagiarized because my instructor is so smart and can know if we are copying. It should not take a long time to answer because all answers are online.The PDF for this assignment is on canvas and I will provide the log in info once you bid to my question.Link: https://gcccd.instructure.com/login/canvasCritical thinking question: Be able to explain why a moss plant cannot grow large. How does the lack of a vascular system limit the size in which the plant can grow? Put your answer here:Critical thinking question: Be able to explain the advantages of a seed over a spore in the following circumstance: Both a seed and spore land on the ground but leaf litter prevents either of them from direct contact with the soil. The seed grows into a plant while the spore perishes. Explain why:Critical thinking question: All life forms on earth produce offspring by a process that is usually called sexual reproduction. In some, asexual reproduction occurs for a time, but is always followed by sexual reproduction. In asexual reproduction the result are offspring that are exactly the same as the original… they are said to be clones. This form of reproduction has major disadvantages to the species when the environment changes dramatically. Sexual reproduction, on the other hand, produces offspring that are not identical to either of the parents because they a mixture of both parent’s genes.What are the disadvantages of offspring produced by asexual reproduction when the environment changes and, in contrast, what are the advantages of offspring produced by sexual reproductionwhen the environment changes?Put your answer here:Question 1. Describe the size difference in seeds and spores and try to explain why one is larger than the other.Table 1. Numbers of Flower Parts in Gladiolus and SnapdragonGladiolusSnapdragonCount these flower parts:Sepals: (these are modified leaves) are the outermost (usually green) structures of the flower.Petals: Notice that the snapdragon flower has some of its petals "fused" together (a result of evolutionary adaptation). Ask your instructor to show you this.Stamens: Be sure to distinguish these from the pistil and do not include the pistil in your count.Pistil: Examine the tip of the stigma: how many parts can you see?Ovary: carpel chambers. Count the number of chambers in the ovary. (Observe a cross-section through the dissecting microscopes at the front of the classroom. Turn on the light(s) and remove the watch glasses covering the specimens to observe. Replace the watch glasses and turn off the lights when you are done.) Question 2. Typically, monocots have flower parts which number in "threes" or "multiples of three." Based on your observations, which of the above plants is a monocot? Question 3. Dicots usually have their flower parts in "fours" or "fives", or some "multiple" thereof. Based on your observations, which of the above species is a dicot?Question 4. Estimate the size of pine, hemlock, and sweet gum pollen, in microns. Question 5. What kinds of organisms are likely to functions as helpers in the pollination process? Question 6. The evolution of flower structure and color is thought to reflect natural selection for more efficient pollination mechanisms. Given that different colors and scents might attract different pollinators, suggest how the odd shape of the snapdragon flower might help the pollination process.Question 7. Conifers and Cycads are wind pollinated. (Note: some Flowering plants (e.g. grasses) no longer have colorful flowers because they have reverted back to using wind for pollination.) Describe a few characteristics you would expect to see in wind-pollinated plants vs. animal-pollinated plants. After pollination, the pollen grain (male gametophyte) germinates, and the pollen tube grows through the tissue of the style to the ovary and enters the ovule where an egg is fertilized. Question 8. It is known that many organisms, or parts of organisms, grow toward or away from various stimuli, such as light, chemicals, gravity, and so forth. Consider what you know about flowers and suggest a likely mechanism that might direct the growth of the pollen tube toward the ovules. Question 9. One of these seeds should separate easily into two equal halves, called cotyledons. Plants with seeds having two cotyledons are called dicotyledons, or "dicots" for short. Of the seeds you examine, which plant is a dicot?Question 10. Those plants whose seeds do not so easily separate and have only one cotyledon are the monocotyledons, or "monocots" for short. Which plant is a monocot?Question 11. How many chambers do the ovaries of the tomato and the green pepper have? Are they monocots or dicots? Question 12. What other plant foods that we eat are commonly called vegetables, but are actually fruits, like the tomato? Give several examples.Question 13. Does the gladiolus have parallel or net veined leaves? Go online to answer this question. Question 14. Do the snapdragons have parallel or net veined leaves? Go online to answer this question.Question 15. In the space below, make you own sketch of a small section of leaf epidermis; include two stomata with their guard cells.Label all parts.Question 16.Which cells of the epidermal layer contain chloroplasts? What do you know is the function of the stomata and guard cells? How do you think the chloroplasts in the guard cells relates to this function? Question 17. Observe the cross section above. In the space below, sketch a small section of the Syringa (lilac) leaf cross section. See Figure 4, the charts in the lab, or the Internet for help. Label the following:cuticle, upper and lower epidermisstoma and guard cellspalisade mesophyll cells and spongy mesophyll cellsvascular tissue (veins, which include xylem and phloem)intercellular space.Question 18.What function do you think the palisade and spongy mesophyll tissues provide for the plant?What do the stomata do for the intercellular spaces in the mesophyll tissue?Why do you suppose that the guard cells have chloroplasts while the other epidermal cells do not? Question 19. Which plant, grass or geranium, has parallel veins in its leaves? Is this plant a monocot or a dicot? (use the internet)Question 20. Which plant has a net-like pattern in its leaves? Is this plant a monocot or a dicot? Question 21. Are these dots parts of structures which extend lengthwise through the stem?Question 23. Dicotyledons have vascular bundles in a ring. Which plant is a dicot?Table 2. Comparison of Monocot and Dicot Characteristics CharacteristicMonocot Example monocot observedDicotExample monocot observedflower parts: most common multiple (3's vs. 4's & 5's)? number of cotyledons in the seeds? type of leaf veins (net vs. parallel?) vascular bundles (scattered vs. ring?) Question 24. In the Grossmont College Wildlife Sanctuary, a chaparral community, the native silverback fern thrives. During what time of the year would you expect this fern to produce gametophytes (Look at the typical plant life cycle) ? Why? This question is about logic, not actualy going out and looking)Question 25. For the sperm of one gametophyte to successfully find its way to the archegonium of another gametophyte, certain environmental conditions must be present. Name some of these:Question 26. Both the sperm and the egg of the fern plant have the haploid (1n) number of chromosomes. Describe the chromosome number of the zygote (the fertilized egg). Using the wall chart in the lab and Figure 4, put the following labels on the diagram below (Structures 1-6): sporophyte spores, sporangia, sorus gametophyteFor sporophyte and gametophyte generations be able to indicate whether it is diploid (2n) and which is haploid (1n).Be able to indicate in which structures meiosis occurs.
DEP 2004 Rasmussen College Human Growth & Development Discussion
Explain the positive and negative aspects of the living arrangements for the elderly listed below. Be sure to thoroughly e ...
DEP 2004 Rasmussen College Human Growth & Development Discussion
Explain the positive and negative aspects of the living arrangements for the elderly listed below. Be sure to thoroughly evaluate each option.Living in own homeLiving with their childrenAssisted living facilityNursing home with intermediate careNursing home with skilled nursing care and make recommendations for healthy and disabled elderly
Conversion method - moles and atoms
1. Write out conversion factors between the moles of each element and the moles of the compound C5H122. Write out the conv ...
Conversion method - moles and atoms
1. Write out conversion factors between the moles of each element and the moles of the compound C5H122. Write out the conversion factor of the given element in the given compound using the mass percent compositiona) Carbon dioxide is 27.19% carbon by massb) Butane is 17.34% hydrogen by massc) C6H8O7 is 58.29% oxygen by massThe Mole Concept3. How many moles of atoms are in the following?a) 8.22 x 1024 As atomsb) 4.41 x 1022 Ne atomsc) 6.77 x 1023 Li atomsd) 2.10 x 1021 S atoms4. How many atoms are in the following given numbers of moles of an element?a) 0.994 mol Fb) 4.39 mol Src) 9.1 x 10-3 mol Bd) 13.8 mol Cl5. Complete the table:6. Calculate the mass in grams of the following:a) 4.45 x 1019 Ag atomsb) 5.50 x 1024 Bi atomsc) 2.08 x 1021 Se atomsd) 7.31 x 1024 Ar atoms7. Calculate the number of atoms in each of the following:a) 14.8g Alb) 3.98g Cac) 1.90g Cod) 26.7g S8. Complete the table:9. Calculate the mass of the following in grams:a) 6.10 mol carbon monoxideb) 0.364 mol sulfur hexafluoridec) 4.44 mol potassium hydroxided) 1.71 mol lithium nitrate10. Complete the table:11. Calculate the number of molecules of the following:a) 13.2g SO2b) 9.03g CH4c) 0.00888g H2d) 157g LiBr12. A sample of C6H6 has a mass of 15ng. Calculate the number of formula units.Chemical Formulas as Conversion Factors13. Calculate the number of moles of O in the following:a) 11.4 mol CO2b) 0.761 mol H2Oc) 4.08 mol N2O5d) 0.302 mol HNO314. How many moles of H are in 1.85 mol [Cr(OH2)5Cl] Cl•H2O?15. Calculate the mass in kg of the following which each contain 3.5 x 102 kg of lithium.a) Li2SO4b) LiOHc) LiBr16. Which of the following contains the greatest number of moles of oxygen? Show all work.a) 3.03 mol C2H6O2b) 16.9 mol N2O3c) 8.27 mol Sr(NO3)2d) 0.0180 mol BaSO4Mass Percent Composition17. A 8.91g sample of an organic compound is found to contain 3.34g C, 0.98g H, 2.61g O, and 1.98g N. Determine the mass percent of each element.18. BaSO4 is approximately 58.84% barium by mass. Calculate the mass of barium in grams in a 7.22g sample of BaSO4.19. Calculate the mass percent composition of oxygen in the following compounds.a) CrO3b) SO2c) NaOHd) Al2(SO4)320. Calculate the mass percent composition of all the individual elements in each of the following compounds.a) HClO3b) AgBrc) PbSO4d) CH4Calculating Empirical Formulas21. An organic compound is found to have 36.03g of carbon, 6.048g hydrogen, and 16.00g oxygen. Determine the empirical formula of the organic compound.22. The nonsteroidal anti-inflammatory drug Ibuprofen consists of 75.69% carbon, 8.80% hydrogen, and 15.51% oxygen. Determine the empirical formula of ibuprofen.Calculating Molecular Formulas23. Determine the molecular formula of each of the following using the given empirical formulas and total molar masses.a) CO2H, 225.09g/molb) CClN, 184.41g/molc) C2H3O, 86.09g/mold) C4H8O, 144.21g/molChallenge Problems24. How many ethanol molecules are in a 613mL container of pure ethanol? Ethanol has a density of 0.7893 g/cm3.25. Aldrin is an insecticide that was commonly used in soil fields until it was banned in many counties. It is found to consist of 39.50% carbon, 2.21% hydrogen, and 58.29% chlorine. Its molar mass is 364.884g/mol. Using this information, determine the molecular formula of Aldrin.
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