AQA GCSE CHEM Quantitative Chemistry MCQs FT

Front

What does the law of conservation of mass state?

Back

no atoms are lost or made during a chemical reaction so the mass of the products equals the mass of the reactants

Front

How many different elements are there in calcium carbonate (CaCO3)?

Back

3

Front

Potassium nitrate has the chemical formula KNO3. What is the total number of atoms in potassium nitrate?

Back

5

Front

Correctly balanced symbol equation for the reaction between magnesium and oxygen?

Back

2Mg + O2 ==> 2MgO

Front

Magnesium + oxygen ==> magnesium oxide 3g of magnesium completely reacts with 2g of oxygen. What is the mass of magnesium oxide formed?

Back

6g

Front

What happens to the mass inside an unsealed test tube when copper carbonate is heated and decomposes into copper oxide and carbon dioxide?

Back

decrease

Front

What is the relative formula mass of sodium hydroxide (NaOH)? Relative atomic masses (Ar): Na = 23, O = 16, H = 1

Back

37

Front

Concentration of solution with 1.5g solute in 2dm³ solvent?

Back

0.75g/dm³

Front

A solution has a concentration of 4g/dm³. What mass of solute is dissolved in 2dm³ of the solution?

Back

8g

Front

Mean mass of product formed in repeated chemical reaction trials?

Back

5.15g