Chemistry Extra Point

Balance the following equations:

Cu + HBr --> CuBr₂ + H₂

Calculate the relative formula masses (Mr) of CH₄

(Ar C=12 ; H=1)

Calculate Mr of H₂CO₃

(Ar H=1 ; C=12 ; O=16)

Calculate the relative formula masses of KNO₃

(Ar K = 39 ; N = 14 ; O = 16)

calculate mass of 1 mol of SO₂.

(Mr SO₂ = 64 g/mol)

Mr is relative (a)   masses

calculate the mass of 0.5 mol of Na₂O

(Mr Na₂O = 62 g/mol)

calculate the number of moles of 1 g of HF.

(Mr HF = 20 g/mol)

calculate moles of 17kg of NH₃.

(Mr NH₃ = 17 g/mol)

In chemical equation, there are 4 states of matter, including solid, gas, liquid and ... solution

(a)