Summer II Chemistry Final Review D

The atomic masses of any two elements contain the same number of ____.

• atoms

• grams

• ions

• milliliters

Tags

NGSS.HS-PS1-7

What is true about the molar mass of chlorine gas?

• The molar mass is 35.5 g

• The molar mass is 71.0 g.

• The molar mass is equal to the mass of one mole of chlorine atoms.

• none of the answers

The mass of a mole of NaCl is the ____.

• molar mass

• atomic mass

• molecular mas

• gram atomic mass

What is the molar mass of AuCl₃ ?

• 96 g

• 130 g

• 232.5 g

• 303.6 g

What is the mass in grams of 5.90 mol C₈H₁₈ ?

• 0.0512 g

• 19.4 g

• 389 g

• 673 g

How many moles of CaBr₂ are in 5.0 grams of CaBr₂ ?

• 2.5 x 10^-2 mol

• 4.2 x 10^-2 mol

• 4.0 x 10² mol

• 1.0 x 10³ mol

The volume of one mole of a substance is 22.4 L at STP for all ____.

• gases

• liquids

• solids

• compounds

The molar volume of a gas at STP occupies ____.

• 22.4 L

• 0 C

• 1 Kilopascal

• 12 grams

Which combination of temperature and pressure correctly describes standard temperature and pressure, STP?

• 0⁰C and 101 kPa

• 1⁰C and 0 kPa

• 0⁰C and 22.4 kPa

• 100⁰C and 100 kPa

The molar mass of a gas can be determined from which of the following?

• the density of the gas at STP

• the volume of a mole of the gas

• Avogadro's number

• none of the answers