Write the composition of cement .

One of the alloys of aluminium is looking like gold and was used for preparing coins in France. Write the compositions of the alloy.

Write the composition of aqua-regia.

Write the composition of brass and german silver ?

Write the composition important of oxide and halide minerals.

Give the composition of Nichrome ?

2 L of hydrogen and 2.5 L of chlorine are allowed react in diffused light. Write the volume composition of the component gases after reaction.

The composition of mica is

The composition of rust is