Chemistry Midterm Review

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Need help with Chemistry multiple choice questions. Please find them in the attachment. (Only bid if you're a pro in chemistry, thanks)

Which of these substances are compounds? I. II. III. IV. Neon Crude oil Water Sodium chloride I I and III II, III, and IV III and IV II and IV Which of these substances are heterogeneous mixtures? I. II. III. IV. Steam Milk of magnesia Crude oil Rubbing alcohol II and III I and IV II, III, and IV I, III, and IV I, II, and III Which of the following is an example of a chemical change? Glass breaking Water freezing Wood burning Alcohol vaporizing Ice melting How many significant figures are there in the number 10.00? 1 2 3 4 0 Determine the density of a 50.0 g sample of mercury having a volume of 3.66 mL. Carry out the calculation to the correct number of significant digits. 13.66 g/mL 13.7 mL 183 g/mL 0.0732 g/mL 0.073 g/mL Convert 89.5 m to millimeters. 8.95 × 104 mm 8.95 × 10−4 mm 8.95 × 102 mm 8.95 × 10−2 mm 8.95 × 105 mm A football field is 100.0 yd long. What is its length in meters? (1 yd = 0.9144 m) 0.09144 m 91.44 m 274.32 m 334 m 9.144 × 103 m The number of protons in a neutral atom is equal to the _____ of the atom. mass atomic weight atomic number mass number valence electron number Which of these is the correct chemical symbol for potassium? K Po P Pd Pt Nonmetals tend to _____ electrons to form _____ ions. lose; negative lose; positive gain; positive gain; negative gain; neutral Metals tend to _____ electrons to form ions of _____ charge. lose; negative lose; positive gain; positive gain; negative gain; neutral Which of these substances is not a mixture of different compounds? Air Salt water Gasoline Table salt Lemonade A tiny amount of magnesium chloride contains 150 magnesium ions and 300 chloride ions. The correct formula for magnesium chloride is _____. MgCl Mg2Cl MgCl2 Mg150Cl300 Mg2Cl2 Which of these does not form a positive ion in an ionic compound? Ba Rb P Sn Mg What does the V in VSEPR theory stand for? Very Variable Valence Vanadium Volume Which of these substances are covalent compounds? I. II. III. IV. CaO H20 PF3 CH4 I and II II and III II and IV II, III, and IV I, II, and III Which of these is the most likely identity of element A in the Lewis dot structure? Ca K N Cl O Which of these is not a subfamily of the hydrocarbon family? Alkenes Alkynes Alkanes Functionalized hydrocarbons Aromatic hydrocarbons How many carbon atoms are there in a molecule of hexane? 4 5 6 7 8 Which of these is the generic symbol for the functional group "alcohols"? R-Cl R-OH The substances responsible for the green color of leaves area class of compounds called _____. chloroforms chlorophylls chlorofluorocarbons carotenes flavonoids Tiny packets of energy that travel at the speed of light are known as _____. photons X-rays carotenes chlorophylls gamma rays Arrange these spectral regions in order of increasing wavelength (Infrared, Radio waves, Ultraviolet, Visible). Radio waves < Infrared < Visible < Ultraviolet Radio waves < Visible < Infrared < Ultraviolet Ultraviolet < Infrared < Visible < Radio waves Ultraviolet < Visible < Infrared < Radio waves Infrared < Radio waves < Ultraviolet < Visible Which of the following processes best describes a beta decay? A proton is converted into a neutron and an electron. A neutron is converted into a proton and an electron. A proton and an electron are converted into a neutron. A neutron and an electron are converted into a proton. A neutron and a proton are converted into an electron. Krypton-85 decays via beta emission to produce _____.

Tutor Answer

SIMPLIFIED
School: UIUC

Attached.

OUTLINE
INTRODUCTION
BODY
CONCLUSION
REFERENCE


Running head: CHEMISTRY

1

Chemistry Midterm Review
Student Name:
Institutional Affiliation:
Instructor:
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2

CHEMISTRY
Which of these substances are compounds?
I.
II.
III.
IV.

Neon
Crude oil
Water
Sodium chloride
I
I and III
II, III, and IV
III and IV

II and IV
Which of these substances are heterogeneous mixtures?
I.
II.
III.
IV.

Steam
Milk of magnesia
Crude oil
Rubbing alcohol
II and
III
I and IV
II, III, and IV
I, III, and IV

I, II, and III
Which of the following is an example of a chemical change?
Glass breaking
Water freezing
Wood burning
Alcohol vaporizing
Ice melting
How many significant figures are there in the number 10.00?
1
2
3
4

0
Determine...

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Anonymous
Excellent job

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