A sample of Fe3(PO4)2 contains 2.55 mol of iron(II) ions. According to the MR from the formula, the number of moles of phosphate ions in the sample is:

The following is the balanced molecular equation for the stoichiometric reaction between H2SO4 by KOH in aqueous solution.              

One mole of chromium nitrate  Cr(NO3)3 contains ________ moles of oxygen (Hint: Use mole ratio from the formula).

Calculate the molar mass in grams per mol for aluminum sulfate hexadecahydrate Al2(SO4)3·16H2O 

Predict the products of a reaction between Ba(NO3)2(aq) and K2SO4(aq).    (Hint: DO NOT FORGET TO BALANCE CHARGES OF IONS IN THE FORMULAS)  

How many moles of chromium atoms are contained in 7.54 g of chromium?

What is the net ionic equation for a reaction between a weak acid and strong base.  

A solution is prepared by dissolving 17.32 g of K3PO4(MM=212.2663g/mol),  in enough water to make 375 mL of solution.  What is the concentration of the solution in units of molarity?

What is the final concentration of HCl in a solution prepared by the dilution of 12.0 mL of 12.0 M HCl to 500.0 mL?   

 What notation is used to indicate that salt precipitates in the reaction?