Convert Mass to Moles and Particles

How many moles are in 16.94 g of water?

• 16.94 mol H₂O
• 0.9401 mol H₂O
• 305.3 mol H₂O
• 1.063 mol H₂O

How many molecules are in 9.44 moles of AlCl₃?

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

Tags

NGSS.HS-PS1-7

How many moles of magnesium are in 3.01x10²² atoms of magnesium?

• 5.00x10⁴⁴ moles Mg
• 0.050 moles Mg
• 1.81x10⁴⁶ moles Mg
• 5 moles Mg

You have 8.65 x 10²⁵ atoms of arsenic. How many grams do you have?

• 144 g As
• 10,765 g As
• 107 g As
• None of these

How many molecules are in 3.6 grams of NaCl?

• 0.06
• 1.0x10²¹
• 1.3x10²⁶
• 3.7x10²²

Tags

NGSS.HS-PS1-7

Calculate the number of atoms in 4.00 x 10^-5 g of sodium.

• 1.05 x 10¹⁸ atoms
• 3.92 x 10¹⁹ atoms
• 3.24 x 10²³ atoms
• 5.54 x 10²⁰ atoms

Calculate the number of nitrogen atoms in 20.9 grams of nitrogen.

• 1.49 moles
• 0.746 moles
• 0.37 moles
• 1.74 moles

What is the mass of 1.0 x 10¹² molecules of O₂?

• 1.9 x 10¹³ g
• 6.0 x 10¹¹ g
• 5.3 x 10^-11 g
• 1.7 x 10^-12 g

How many atoms of carbon are in 6.00g of carbon?

• 1.20x10²⁴atoms C
• 6.02x10²³atoms C
• 3.01x10²³atoms C
• 1.50x10²³atoms C

What is the molar mass of PbSO₄?

• 303.27 g/mol

• 255.27 g/mol

• 163.87 g/mol

• 372.27 g/mol