C3 Quantitative Chemistry Combined Foundation

What is the relative formula mass of CO₂?

• 44
• 32
• 16
• 56

Calculate the molar mass of Magnesium Chloride - MgCl₂

• 71
• 35.5
• 59.5
• 95

Which of the following has a positive charge?

• proton
• neutron
• electron

A chemical formula is a combination of symbols and numbers that represent a compound.

• True
• False

Oxygen is an example of 

• an element.
• a compound.
• a substance.
• a mixture.

Which of the following is an example of a compound?

• sugar
• hydrogen
• boron
• apple juice

The ________________ is best described as particles are neither created nor destroyed during a physical or chemical change.

• Law of Conservation of Mass
• Chemical Reaction
• Chemical Equation
• Change in Thermal Energy

Which of the following is an example of a balanced equation?

• Na + 2Cl -> NaCl
• 2Fe + S -> Fe₂S
• CO₂ + H₂O -> CH₄ + 2O₂
• H₂ + O₂ -> H₂O

Tags

NGSS.MS-PS1-5

What particles of an atom are found in the nucleus?

• proton and electron
• electron and neutron
• proton and neutron 
• protons only

During a chemical reaction, a gas is produced which escapes into the air. Does the mass of the product appear to..

• increase

• decrease

• stay the same