Which statement about the atomic nucleus is correct

What is the formula for chalcocite copper (i) sulfide

1 - Hard and symmetrical in shape forms from a solution called? 2 - The stuff which dissolves a substance is called?

A carbon atom has six protons and six neutrons. What is its atomic number?

Activation energy is defined as

When 2.5g of copper sulphate are dissolved in 500ml of water, the concentration of the solution is

Define buffer capacity. a. buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness. b. buffer capacity is the amount of acid that can be added until all of the base is used up. c.

Which of the following is not a chemical reaction a) gas formation b) solid formation c) energy change d) state change

How many moles of copper are needed to react with sulfur to produce 0.25 moles Ol copper (1) sulfide according to the following reaction: 2 Cu + S + Cuzs

If you wish to warm 52 kg of water by 22 ∘c for your bath, find what the quantity of heat is needed. express your answer in calories cal.

Which of the following compounds is the most soluble in water? a) propanoic acid b) propane c) propanal d) l-bromopropane