Moles Chemistry

How many moles are in 20 grams of Ca (Calcium)?

• 0.5 

• 1

• 3

• 20

N₂ + 3H₂ --> 2NH₃
How many moles of N₂ is needed to react with 6 moles of H₂?

• 6.7

• 2.0

• 3.0

• 15.0

Tags

NGSS.HS-PS1-7

Balance this equation _N₂ + _H₂ --> _NH₃

• 1,2,3

• 1,3,2

• 1,1,2

Tags

NGSS.HS-PS1-7

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol

• 35.453 g/mol

• 22.990 g/mol

• 58.443 g/mol

The mass of one mole of an element is equal to

• its atomic number from the periodic table, but in amus.

• its atomic mass from the periodic table, but in amus.

• its atomic mass from the periodic table, but in grams.

• its atomic number from the periodic table, but in grams.

Calculate the molar mass of KOH.

• 28 g/mol

• 56 g/mol

• 84 g/mol

• 112 g/mol

What is the molar mass of Cl₂?

• 17 g/mol

• 35.5 g/mo;

• 71.0 g/mol

• 89 g/mol

If I need 20.4 moles of sodium chloride, how much should I weigh out?

• 0.549 g

• 112 g

• 1192 g

• 5077 g

How many grams are in 10 mol of fluorine?

• 19 grams

• 190 grams

• 90 grams

• 9 grams

How many grams is 3 moles of sulfur?

• 96g

• 32g

• 16g

• 8g