How many moles are in 28.7 g of cobalt

Why is aluminium more reactive than chromium, in terms of electrons?

Calculate the molality of 2.0 M MgCl2 solution. The density of the solution is 1.127 g/mL. (The molar mass of MgCl2 = 95.211 g/mol and the molar mass of H2O is 18.02 g/mol.)

If u could invent one "science gizmo," what would it be?

The two products that are formed when a solution of HNO3 and a solution of NaOH react are water and 1. NaNO2. 2. NaNO3. 3. NaHNO. 4. NaHNO3.

Which will not appear in the equilibrium constant expression for the reaction below

To which digestione organ dose food travel it leaves the stomach

How should a stopper be handled after is has been removed from a reagent bottle?

How will increasing the pressure on the system affect this equilibrium reaction? 2H2 (g) + O2 (g) - > 2H2O (g)

What are small round structures in the cell that breaks down large food particles into smaller ones

A balloon has a volume of 2.5 L and contains 0.100 moles of Helium. Another balloon has a volume of 5.0 L. They are at the same temperature and pressure. How many moles of gas does the second balloon contain?