How many molecules would be in 8.4 moles of Octane (C₈H₁₈)?

• 1.40 x 10^-23

• 5.06 x 10²⁴

• 959.8

• 1.59 x 10^-21

How many moles of Na contain 1.45x10²¹ atoms of Na?

• 8.73x10⁴⁴

• 3.33x10²²

• 0.00241

• 0.0554

How many liters does 48.0 g of fluorine gas occupy?

• 1.26

• 2.14

• 7.60 x 10²³

• 28.3

The mass of one mole of substance is called...

• molecular mass

• Avogadro's number

• molar mass

• atomic weight

How many moles are in 19.82 g Mg? 

• 1.226mol Mg
• 481.7mol Mg
• 1.000mol Mg
•  0.8156 mol Mg

Tags

NGSS.HS-PS1-7

What is the molar mass of Gold (III) chloride?

• 196.967 g

• 626.354 g

• 232.42 g

• 303.326 g

What is the percent of sulfur in the compound MgSO₄ ?

• 20%

• 27%

• 46%

• 53%

What is the percent of calcium in CaF₂ ?

• 24%

• 49%

• 51%

• 65%

Which of the following represents an empirical formula?

• H₂O₂
• HC₂O₄
• H₂O₆
• H₁₂O₄₈

What is the empirical formula for the following molecular formula: C₆H₁₄

• C₆H₁₄
• C₃H₇
• CH₂
• CH₃