Number of Particles, Moles and Molar Mass

If you want 1.55 moles of nitrogen trichloride, how many grams should you measure out?

• 0.0129 g

• 120. g

• 187 g

• 9.33 g

Tags

NGSS.HS-PS1-7

How do you feel about moles and calculating molar mass?

• Great!

• I understand, but might need more practice

• I understand moles, but not molar mass

• I understand molar mass, but not moles

• I do not understand.

Tags

NGSS.HS-PS1-7

How many formula units are in 315g of zinc perchlorate?

• 19

• 1.1919

• 7.18x10²³

• 7.18x10²⁵

How many grams are in 1.2 x 10²⁴ atoms of C?

• 29.34 grams

• 23.94 grams

• 6.02 grams

• 1.21 grams

Calculate the number of atoms in 0.0340 g Zn.

• 5.200 x 10^-4 atoms Zn

• 3.130 x 10²³ atoms Zn

• 3.130 x 10²⁰ atoms Zn

• 1 atom Zn

Tags

NGSS.HS-PS1-7

Determine the mass of 4.20 moles of C₆H₁₂

• 354 g

• 84 g

• 337 g

• 421 g

Tags

NGSS.HS-PS1-7

What is the molar mass of PbSO₄

• 303.3 g/mol

• 294.7g/mol

• 163.8g/mol

• 372g/mol

How many grams of NH₃ would result in 8 moles of NH_3. What does the the number 8 do to the molar mass of the compound?

• The number 8 is added to the molar mass to give 25 g/mol.

• The number 8 multiplies the molar mass by 8 to give 136 g/mol.

• The number 8 divides the molar mass by 8 to give 2.13 g/mol.

• The number 8 does not change the molar mass of the compound.

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆? 

• mole = 78.12 g

• mole = 22.4 L 

• mol = 6.02x 10²³ particles 

• more than one

Which conversion factor should be used to solve the following, "How many moles in 28 grams of CO₂?"

• 1 mol = 22.4 L

• 1 mol = 44.0 g

• 1 mol = 6.02x10²³ atoms

• more than one