Chemistry: Chemical Quantities

What number must we use to convert between particles and moles?

• Avocado's Number

• The speed of light

• Avogadro's Number

• The mass of the compound

What is the conversion factor from liters to moles?

• 28.01 g

• 2 g

• 12.01 g

• 44.01 g

Six grams of carbon combine chemically with 2 grams of hydrogen to produce combustible gas. What is the empirical formula of this gas?

• 240 g

• 2.133 g

• 480 g

• 1.067 g

Tags

NGSS.HS-PS1-7

• N: 87.4% H: 12.6%

• N: 12.6% H: 87.4%

• N: 50% H: 50%

• N: 75% H: 25%

When calculating the percent composition, what should all of the percentages add up to?

• 75 %

• The number of atoms in the molecule

• It should equal the total mass of the molecule

• 100%

• 0.83 mol

• 1.204 mol

• none of the above

How many liters are in 3.4 moles of a gas?

• 0.15 L

• 6.59 L

• 3.4 L

• 76.16 L