Phosphine, an extremely poisonous and highly reactive gas, reacts with oxygen gas to form tetraphosphorus decaoxide and water. ph3(g) + o2(g) → p4o10(s) + h2o(g) [unbalanced] calculate the mass of p4o10(s) formed when 225 g of ph3 reacts with excess oxygen.

The molar mass of PH3 is 34 g/mol, therefore the moles is:

moles PH3 = 225 g / (34 g/mol)

moles PH3 = 6.62 mol

The balanced equation is:

4PH3(g) + 8O2(g) → P4O10(g) + 6H2O

We see that 4 mol of PH3 is required for every mol of P4O10, therefore the number of moles of P4O10 is:

moles P4O10 = 6.62 mol * (1/4)

moles P4O10 = 1.65 mol

The molar mass of P4O10 is 283.89 g/mol, so the mass is:

mass P4O10 = 1.65 mol * 283.89 g/mol

mass P4O10 = 469.67 grams ~ 470 grams

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

i'm pretty sure it is letter c.) car