Find the molar mass of pentane (C₅H₁₂).

• 20.8 L

• 20.7 L

• 20.9 L

• 21.0 L

Tags

NGSS.HS-PS1-7

41 L of a gas are held at STP. How many moles of the gas are present? Round to the nearest hundredth.

• 1.86 mol

• 1.96 mol

• 2.06 mol

• 2.16 mol

What size container would be needed to hold 6.95 mol of a gas at STP? Round to the nearest hundredth.

• 155.68 L

• 158.65 L

• 160.68 L

• 168.58 L

Two containers both held at STP contain 44 L of different gases. One contains oxygen gas and one contains neon gas. Which container holds more moles of its contained gas?

• Container with oxygen

• Container with neon

• Neither container holds more moles

How many liters are in 74,157 mL?

A news reporter is covering breakthrough research on a study involving materials close to absolute zero. The reporter wants to make the temperatures involved more digestible for the readers by converting to Celsius. How would the reporter convert the Kelvin temperatures in this scenario? Describe what the reporter should do mathematically in this scenario.

Tags

NGSS.HS-PS3-1

Tags

NGSS.HS-PS1-7