How many moles of copper (II) sulfate pentahydrate do you need to make 3.5L of 1.5M solution?

What is the molar mass of a gas that has density of 2.054 g/l

Areaction in which products can react to re-form reactants is

The diagram shows the relationship between scientific disciplines.the names of some scientific disciplines have been removed from the boxes. which scientific discipline belongs in the blue box? a.physics b.biology c.chemistry d.metallurgy