HCN + _
CuSO4 → _
H2SO4 + __Cu(CN)2

Hey there!

HCN + CuSO₄ → H₂SO₄ + Cu(CN)₂

Balance CN.

1 on the left, 2 on the right. Add a coefficient of 2 in front of HCN.

2HCN + CuSO₄ → H₂SO₄ + Cu(CN)₂

Balance H.

2 on the left, 2 on the right. Already balanced.

Balance SO₄.

1 on the left, 1 on the right. Already balanced.

Balance Cu.

1 on the left, 1 on the right. Already balanced.

Our final balanced equation:

2HCN + CuSO₄ → H₂SO₄ + Cu(CN)₂

Hope this helps!

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.