How many moles of oxygen atoms are present in 5 moles of Mg3 (PO4) 2

How can you separate a mixture of zinc and sulfur?

Two characteristics of dynamic equilibrium.

When a 3.80 g sample of magnesium nitride (MW 101g/mol) is reacted with 3.30 g of water, 3.60 g of MgO is formed. What is the percent yield of this reaction? Mg3N2 + 3 H2O - - > 2 NH3 + 3 MgO

What volume of 9.00 m nitric acid is needed to make 6.50 l of 1.25 m solution?

How can you use the periodic table to find the number of neutrons in one atom of an element? The number of neutrons is equal to the number of electrons. The number of neutrons is equal to the atomic number of the element.

Mizar is a star system that is composed of two pairs of stars, mizar A and mizar B, or four stars in total. What do astronomers call a system that is composed of more than two starts?

A 25.00 g solid sample of Ca (OH) 2 was added into 1250 mL of 0.400 M HCl aqueous solution. The temperature of the solution was decreased from 36.6oC to 20.0oC. Assuming Ccal of the reaction is 5.225 kJ/oC, how much heat is involved in the reaction?

Why isn't a largest predator just at the top of a food web?

What is the electrical charge of a cation? A. zero B. positive C. negative

You measure the mass of a model car to be 230 grams. The actual mass is 218 grams. what is your percent error