Review 5-1-2019

What is the molar mass of sodium?

• 11
• 22.990
• 45.98
• 3

What is the percent composition of water?

• H = 11.1%
  O = 89.9%
• H = 66.7%
  O = 33.3%
• H = 5.6%
  O = 89.9%
• H = 20%
  O = 80%

Tags

NGSS.HS-ESS2-5

What is the percent by mass of Br in CuBr₂?

• 50%

• 71.6%

• 28.4%

• 44.3%

What is the percent by mass of Cu in CuBr₂?

• 50%

• 71.6%

• 28.4%

• 44.3%

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³
• 146
• 4.15
• 1.51x10²⁴

Tags

NGSS.HS-PS1-7

How many molecules of sugar (C₆H₁₂O₆) are in a mole?

• 24 molecules
• 180 molecules
• 180 g
• 6.02 x 10²³ molecules

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

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

Tags

NGSS.HS-PS1-7

How many grams are in 1.2 x 10²⁴ molecules of CO?

• 28 grams
• 56 grams
• 6.02 grams
• 1.2 grams

Tags

NGSS.HS-PS1-7

How many steps are in a gram to mole conversion?

• 1
• 2
• 3
• 4

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.05 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5 moles