Chemistry Quiz 11 2021

What is the molar mass of C₆H₁₂O₆?

• 180.18
• 180.12
• 180.24
• 180.06

How many molecules are in 2.5 moles of NaCl?

• 1.5 x10²⁴ molecules

• 1.5 molecules

• 4.2 molecules

• 4.2 x10^-24 molecules

You want to measure out 6.0 moles of epsom salt (MgSO₄) to put in your bath. How many grams of MgSO₄ is that?

• 3.6 x 10²⁴ g

• 720 g

• 0.050 g

• 340 g

How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)₃?

• 1.26 moles

• 0.8 moles

• 7,670 moles

• 1.63 x 10^-22 moles

To melt the ice, you throw 455 g of calcium chloride, CaCl₂ onto the sidewalk. How many moles of CaCl₂ did you throw?

• 50,500 moles

• 4.10 moles

• 7.56 x 10^-22 moles

• 111 moles

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³
• 146
• 4.15
• 1.51x10²⁴

How many grams are in 0.375 mol KBr

• 39,10 g

• 44.625 g

• 0.003 g

• 56.525 g

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³
• 146
• 4.15
• 1.51x10²⁴

How many molecules of water (H₂O) are in a 821.3 g sample?

• 45.58 molecules

• 8.232 x 10²⁵ molecules

• 8.909 x 10²⁷ molecules

• 2.744 x 10²⁵ molecules

An element's atomic mass, expressed in atomic mass units on the periodic table, is equal to its ________ mass.

• actual

• molar

• theoretical

• empirical