Assuming the dicalcium phosphate is anhydrous (no water molecules attached to it), you will have 2.95 g of calcium and 2.28 g of phosphorus for every 10.0 g of dicalcium phosphate.
Depends what the 1.0 ml. substance is. If it's water it would weigh 1.0 grams. If it's mercury it would weigh about 13.5 grams. The weight depends on the substance.