Test 5 Chemistry

What is the molar mass of Na₂S ?

• 78.05 g/mol

• 55.06 g mol

What does STP stand for?

• Stone Temple Pilots

• Standard Temperature Protocol

• Standard Temperature and Pressure

• Scientifically Treated Petroleum

What is the pressure at STP?

• 44 psi

• 300 kPa

• 1 atmosphere

• 3 atm

The temperature at STP is....

• 100 degrees F

• 0 degrees F

• 273 Kelvin

• 212 degrees Farenheit

1 mole of any gas at STP takes up .....

• 3 Liters of space

• 6.02 x 10²³ liters of space

• 22,400 liters of space

• 22.4 liters of space

heating baking soda produces

• hydrogen gas

• nitrogen gas

• carbon dioxide gas

• oxygen gas

Pressure in a balloon is caused by....

• molecules of gas hitting each other

• molecules of gas hitting the inside of the balloon

• molecules of gas outside the balloon hitting each other

2H₂   +   O₂  →  2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles
• 8 moles
• 16 moles
• 2 moles

What is 50 C in Kelvin?

• 223

• 323

• 100

• -223

Which of the following would increase the pressure on a system?

• Increase the Temperature
• Pump in more gas
• Decrease the volume
• All of these