# Mole Basics: Question Preview (ID: 8777)

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The volume of 1 mol of a gas in liters at STP is
a) 22.4 L
b) 44.8 L
c) 11.2 L
d) 6.02 x 1023 L

What is the gram formula mass of Ca(OH)2?
a) 29g
b) 74g
c) 57g
d) 34g

How many molecules are in 38 g of F2 gas?
a) 12 x 1023 molecules
b) 3.0 x 1023 molecules
c) 6.0 x 1023 molecules
d) 9.0 x 1023 molecules

How many moles of copper are equivalent to 3.44 × 1023 molecules of copper?
a) 1.75 moles
b) 5.71 x 1022 moles
c) 5.41 x 1021 moles
d) 0.571 moles

What is the mass of 2 moles of HgO?
a) 108 g
b) 433 g
c) 323 g
d) 217 g

Which substance has the greatest molecule mass?
a) H2O2
b) CF4
c) I2
d) NO

What mass of carbon dioxide gas occupies a volume 22.4 L at STP?
a) 22.0 g
b) 88.0 g
c) 66.0 g
d) 44.0 g

A student has one mole of an unknown compound in a test tube. The mass of the compound is 58.4 g. The compound could be
a) CaCl2
b) CuCl
c) AgNO3
d) NaCl

How many moles are in 5.6 L of O2(g) at STP?
a) 1.0 moles
b) 0.25 moles
c) 0.50 moles
d) 0.75 moles

At STP, 170 g of NH3 gas will occupy a total of
a) 224 L
b) 2240 L
c) 2.24 L
d) 22.4 L

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