1. Calculate the number of grams of copper(II) sulfate pentahydrate, CuSO4-5H,0, required to
prepare 100.0 mL of a 0.150 M solution.

Why is any chemical reaction always balanced? give reasons and explain the easiest way to solve the balancing problems in chemical equations with stoichiometric coefficients upto 20 as hit and trial doesn't always work. give full reasoning

What is the relative mass of an electron? a) 1/1840 the mass of a neutron + proton b) 1/1840 the mass of an alpha particle c) 1/1840 the mass of a c-12 atom d) 1/1840 the mass of a hydrogen atom

Which is an example of a mixture? a. water b. trail mix c. hydrogen d.carbon dioxide