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##### Easy Mole questions (SHOW CALCULATIONS CLEARLY)

 Chemistry Tutor: None Selected Time limit: 0 Hours

1- How many items are in 1.00 moles of Carbon?

2- How many grams of carbon are in 1.50 moles of Carbon?

3- How many moles of Hydrogen gas are in 5.04 grams of Hydrogen gas?

4- How many molecules of Carbon Dioxide (CO2) are in 88 grams of CO2

Mar 19th, 2015

1)  6.023 x10^23 atoms.

1 mole of anything is 6.023 x10^23 units.

2) 1 mole of Carbon = 12 grams

1.5 mole = 1.5 x 12 = 18 grams

3) 5.04 grams hydrogen gas (1 mole H2/2.016 grams)

= 2.5 moles hydrogen gas

4) Atomic mass of CO2 = 12 + 32 = 44

88 grams is 2 mole of CO2.

1 Mole = 6.023 x10^23 molecules

2 Mole = 12.046 x10^23 molecules

Mar 19th, 2015

This is great!

But can you please elaborate further on question 3?

Much appreciated!

Mar 19th, 2015

Sure....give me 5 min.

Mar 19th, 2015

5.04 grams hydrogen gas

Hydrogen gas = H2 Whose atomic mass = 2.016 g

{ As, the atomic mass of H = 1.008 g }

1 mole H2 = 2.016 grams

x mole of hydrogen = 5.04 grams

By unitary method:

1/x = 2.016/5.04

x = 5.04 / 2.016 = 2.5 moles

Hence, 2.5 moles hydrogen gas is the answer.

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Mar 19th, 2015

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Mar 19th, 2015
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Mar 19th, 2015
Dec 4th, 2016
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