Molar mass and % composition

What is the molar mass of sodium?

• 11
• 22.990
• 45.98
• 3

Tags

NGSS.HS-PS1-1

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

Fluorine is diatomic.  What is the molar mass of fluorine gas?

• 18.998 g/mol
• 37.996 g/mol
• 9 g/mol
• 18 g/mol

What is the molar mass of aluminum chloride?

• 62.435g

• 116.399g

• 133.341g

• 97.888g

What is the molar mass of lead (II) sulfate?

• 303.3 g/mol

• 294.7g/mol

• 163.8g/mol

• 372g/mol

What is the percentage of chromium in potassium dichromate?

• 38.1%
• 27.2%
• 34.7%
• 100%

Find the percent composition of hydrogen in ammonium sulfide.

• 11.8%

• 41.1%

• 47.1%

Find the percentage composition of Mg in Magnesium phosphate.

• 27.75% Mg

• 23.57% Mg

• 48.68% Mg

• 13.45% Mg

How many molecules are in 9.44 moles of AlCl₃?

• 5.68 molec AlCl₃
• 5.68x10²⁴ molec AlCl₃
• 0.705 molec AlCl₃
• 1.25x10²³ molec AlCl₃

Tags

NGSS.HS-PS1-7

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³

• 146

• 4.15

• 1.51x10²⁴