A piece of zinc-copper alloy has a mass of 25 g. It was placed into a graduated cylinder and the volume of the water is increased by 32
mL. What is the density of the alloy?

Which type of reaction always has an element and a compound as reactants

This is a characteristic of the elements in the periodic table that shows a pattern. it may increase or decrease across or down the table.

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride