The molar volume of a gas at STP occupies _____________.

• 22.4 L

• 0˚C

• 1 kiloPascal

• 12 grams

Chemical equations must be balanced to satisfy ____.

• The law of definite proportions

• The law of multiple proportions

• The law of conservation of mass

• Avogadro's principle

Tags

NGSS.HS-PS1-7

What are the coefficients that will balance the skeleton equation below?

AlCl₃ + NaOH → Al(OH)₃ + NaCl

• 1,3,1,3

• 3,1,3,1

• 1,1,1,3

• 1,3,3,1

Tags

NGSS.HS-PS1-7

How many moles of aluminum are needed to react completely with 1.2 mol of FeO?

2Al(s) + 3FeO(s) → 3Fe(s) + Al₂O₃(s)

• 1.2 mol

• 0.8 mol

• 1.6 mol

• 2.4 mol

What is the name of H₂SO₄?

• hyposulfuric acid

• hydrosulfuric acid

• sulfuric acid

• sulfurous acid

If 2.00 L of a gas in a container at room temperature exerts a pressure of 4.00 atm. If the pressure doubles and the temperature remains the same, the volume would become ________.

• 16.0 L

• 2.00 L

• 4.00 L

• 1.00 L

A sample of gas occupies 52.0 mL at 20℃ and 1.00 atm. What volume will it occupy at 40℃ and 1.00 atm?

• 62.4 mL

• 44.8 mL

• 55.5 mL

• 48.7 mL

When an equation is used to calculate the amount of product that could form during a reaction, then the value obtained is called the ____.

• Actual yield

• Percent yield

• Minimum yield

• Theoretical yield

The equation 2C₃H₇OH + 9O₂ → 6CO₂ + 8H₂O is an example of which type of reaction?

• Combustion reaction

• Single replacement reaction

• Double replacement reaction

• Decomposition reaction

The specific heat of ethanol is 2.44J/g˚C. How many kilojoules of energy are required to heat 50.0g of ethanol from -20.0˚C to 68.0˚C?

• 10.7 kJ

• 8.30 kJ

• 2.44 kJ

• 1.22 kJ

Tags

NGSS.HS-PS3-1