Molar Mass / Unit 4 HHMH

What is a mole?

• A chemistry unit

• A unit of amount

• The amount of a substance that contains 6.02 x 10^23 representative particles of that substance.

• All of these

The number of representative particles contained in one mole of a substance; equal to 6.02 x 10^23 particles.

• Avogadro's Number

• No Number

• Phosphorous's Number

• All of these

Find the molar mass of NaCl.

• 14 g/ mol

• 58.44 g/mol

• 90 g/mol

• 110 g/mol

Find the molar mass of Hydrogen.

• 1.01 g/ mol

• 14 g / mol

• 99 g/ mol

• All of these

Find the molar mass of Carbon.

• 9 g/mol

• 13 g/mol

• 12 g/mol

• 65 g/mol

Draw the empirical formula for each of these on a separate page.

• N/A

• N/A

• N/A

• N/A

Any reactant that is used up first in a chemical reaction; determines the amount of product that can be formed in the reaction.

• Hovering Reagent

• Limitting Reagent

• Boundary

• None of these

What is the limiting reagent when Na (sodium/ salt) is mixed with H20 (water)?

• sodium

• water

• both of these

• none of these

The limiting reagent runs out first in a reaction.

• True

• False

If a sandwich requires 2 pieces of meat, 2 pieces of bread, and 1 piece of cheese and we have 4 pieces of bread, 4 pieces of meat, and 1 piece of cheese what is the limiting reagent?

• meat

• cheese

• bread

• All of these