Mols-g & % Composition

A baker needs 6 g of baking soda for a recipe. The chemical formula for baking soda is NaHCO₃. How many moles of baking soda is needed?

• 0.071 mol

• 0.167 mol

• 0.273 mol

• 0.214 mol

Tags

NGSS.HS-PS1-7

How many moles are in 100 g of carbon dioxide, CO₂?

• 2.27 mol

• 2.36 mol

• 3.51 mol

• 1.49 mol

How many grams are in 0.523 mol of AlPO₄?

• 63.78 g

• 38.68 g

• 47.23 g

• 55.43 g

Tags

NGSS.HS-PS1-7

What is the molar mass of Al₂S₃?

• 150.17 g/mol

• 59.05 g/mol

• 138.23 g/mol

• 75.27 g/mol

How many moles are in 1459 grams of Na?

• 63.46 moles

• 60.36 moles

• 10 moles

• 1 mole

What is the mass in grams of 5.90 mol C₈H_18?

• .0512 g
• 19.4 g
• 673 g
• 389 g

Tags

NGSS.HS-PS1-7

What is the percent by mass of oxygen in MgO?

• 20%
• 40%
• 50%
• 60%

What is the percent by mass of magnesium in MgO?

• 20%
• 40%
• 50%
• 60%

What is the percent by mass of fluorine in CaF₂ (gram-formula mass = 78 g/mol)?

• 24%
• 49%
• 51%
• 65%

What is the percent by mass of calcium in CaF₂ (gram-formula mass = 78 g/mol)?

• 24%
• 49%
• 51%
• 65%