PLEASE! For the reaction P4(s) + 6 H2(g) → 4 PH3(g)
a) If 15 g of Pa were used, how many liters of PHs were produced?
b) How many liters of H2 are required to completely react with 15 g of P4?
C) How many grams of PHs will be produced if 6.0 L of H2 are used?

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

What is the mass of 4 molecules of co2

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder