What the are units for molar mass?

• grams/mole

• atoms/mole

• grams/atoms

• mloes/atom

Tags

NGSS.HS-PS1-7

What is the molar mass for oxygen gas (O₂)?

• 16 g/mol

• 32 g/mol

• 14 g/mol

• 15.999g/mol

What is the molar mass for water (H₂O)?

• 33 g/mol

• 14.32 g/mol

• 2.02 g/mol

• 18.02 g/mol

Tags

NGSS.HS-PS1-7

What is the conversion factor between mole and grams?

• 1 mole = 6.022 x 10²³ grams

• 1 gram of the substance = molar mass of the substance

• 1 atom = 6.022 x 10²³ moles

• 1 mole = 6.022 x 10²³ atoms/particles

When calculating the molar ratio, we use the

• Coefficients

• Limiting Reagent

• subscripts

• subscripts

What is the molar mass of CO₂?

• 40.01 L/g

• 40.01 g

• 44.01 g/atom

• 44.01 g/mol

Tags

NGSS.HS-PS1-7

What mass of NaCl can be produced from 0.75 mol of chlorine gas (Cl2)?

• 0.75 g

• 1.5 g

• 44 g

• 88 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In stoichiometry, chemists are mainly concerned with

• mole and mass relationships in chemical reactions.

• the types of bonds found in compounds.

• energy relationships in chemical reactions.

• the speed with which chemical reactions occur.

Tags

NGSS.HS-PS1-7

For the reaction pictured how many moles of nitrogen gas (N2) are required to produce 18 mol of ammonia (NH3)?

• 18

• 9.0

• 4.5

• 36

Tags

NGSS.HS-PS1-7

What mass of carbon dioxide (CO2) can be produced from 25.0 g of calcium carbonate (CaCO3)?

• 25.0 g

• 11.0 g

• 22.0 g

• 56.0 g

Tags

NGSS.HS-PS1-7