One molecule of P2O3 = 1 mole. Go to the Periodic Table P = 30gm x 2 = 60 gm. O= 16 gm x 3 = 48 mg. Total is 60 + 48 = 108 gm is the weight of one molecule which is also the number of grams in 1 mole (remember 1 mol = 1 mole). So since you have 37.9 grams divide this by 108 and you have .35 moles.
Using the periodic table we can find the molecular weight of H3PO4:
for hydrogen: 3*1.01 g/mol = 3.03
for phosphorus: 1*30.97 g/mol = 30.97
for oxygen: 4*16.00 g/mol = 64.00
Adding these all up you get 98.0 g/mol
Now divide the mass of 37.1 g by the molecular weight of 98 g/mol to get the number of moles. In this case: 0.38 moles of H3PO4
Each mole P4O10 needs 6 moles of water to form (4 moles of) H3PO4 to balance the equation:
P4O10 + 6H2O --> 4H3PO4
so for 71.0 g P4O10 it comes to:
71.0(g P4O10) / 98.0(g P4O10/mol P4O10) = 0.724 mol P4O10
and this needs 6*0.724 = 4.35 mole H2O
The molar mass of H3PO4 is approximately 98 g/mol.
If you have 9.17 grams of H3PO4 then by unit analysis we have to divide by the molar mass to cancel grams and to find moles.
9.17 (grams) / 98 (grams/mol) = .0936 mol H3PO4
M = 3(1.0) + 31 + 4(16) = 98 g/mol
n = 5 g x (1 mol/98 g) =0.051 mol
H3PO4 is phosphoric acid, H2PO4 is an ion and would need another ion.
H3PO4 has a molar mass of 98g/mole. 100g x 1mole/98g = 1.02 mole
0.306 moles H3PO4
The answer is 0,306 moles.
The answer is 0,003 mol.
100 grams oxygen (1 mole O/16 grams)(2 mole Fe/3 mole O) = 4.17 moles iron --------------------------
450 g water 100g sugar 30g vinegar 2g salt for vinegar use2.4 g of acetic acid
16 grams of oxygen how many moles is 0,5 moles.
moles of what?
2 moles of Ca and 4 moles of OH
100 grams oxygen (1 mole O/16 grams)(2 mole Fe/3 mole O) = 4.17 moles iron --------------------------
This is a mass stoichiometry problem. Start with the balanced equation: CaCO3 --> CaO + CO2. Do a conversion from 50g CaO to moles: 56g/1mol=50g/x, x=.9 moles. The equation is balanced as written, with all coefficients understood to be 1. So: .9 moles CaO means .9 moles CaCO3. Do another conversion from moles to grams: 100g/1mol=x/.9 moles. Solve for x to get 90 grams. (56g=molar mass of calcium oxide; 100g=molar mass of calcium carbonate.)
1 mol = 118.94 1 mol / 118.94 = 1.70 / x G = 202.10g
moles = mass (g) divided by the molecular weight (g/mol) moles = 100g/12.01
63,5kcal/100g tofu
n=(1atm)(49L)/(0.0821)(273.15)=2.19 moles2.19 moles x 44g of CO2 =96.36g of CO22.19 moles x 100g of CaCO3= 219g of CaCO3
266 cal per 100g
In H2O the conjugate base is H2PO4-, being conjugated to the acid H3PO4. As well: H3PO4 is conjugated acid to the base H2PO4-.
phosphate
H3PO4 + 1 OH- --> H2PO4- + 1 H2O H3PO4 + 2 OH- --> HPO42- + 2 H2O H3PO4 + 3 OH- --> PO43- + 3 H2O
Fried potato wedges(100g) contain 235 kcal .
There would be 129 calories in 100g of jasmine rice.