Chemistry problems please help???

Posted on 2015-10-14 07:11:00 in Chemistry by SHLOMOR

1. When aqueous solutions of barium nitrate, Ba(NO3)2, and ammonium iodate,NH4IO3,are mixed together, barium iodate, Ba(IO3)2 forms a precipitate. What is the net ionic equation for the reaction(write the full ionic equation before the net ionic equation)?

2. What is the concentration of a solution with a volume of 2.5 liters containing 660 grams of calcium phosphate?

3. How many grams of copper(II) fluoride are needed to make 6.7 liters of a 1.2 M solution?

4. Explain why 0.20 moles of aluminum is a relatively small number, but the number of individual atoms in 0.20 mole of aluminum is a larger number.

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