The chemical equation for hydrogen gas and oxygen gas combining to form water is as follows: 2H2 (g) + O2 (g) ---> 2H2O (l). This means that for every 1 mole of oxygen gas reacting, two moles of hydrogen gas are needed. So if 0.50 moles of oxygen gas react to form one mole of water, then one mole of hydrogen gas was used.
Well calculate it out. You know that there are 6.02X10^23 atoms in a mole. You know that hydrogen has a GMW of 1.0 and oxygen has a GMW of 16. You know that water is H2O. You know, therefore how much a mole of water weighs. You also know that the specific gravity (in this case SG=Density) is 1 g/ml. Now you have all you need to know to derived the answer. We aren't here to do your homework for you.
Balanced equation first.
2H2 + O2 -> 2H2O
0.50 moles O2 (2 mole H2/1 mole O2)
= 1 mole H2
But your question said to produce 1 mole H2O, so you may have to divide that answer in half.
2 atoms (molecules) of hydrogen are needed to react with oxygen to form water.
0.45 mol O x 1 mol H2O x 2 mol H x 1.0079g =0.90711g H
1 mol O 1 mol H2O 1 mol H
Balanced equation first.
2C2H2 + 5O2 -> 4CO2 + 2H2O
They are 1 to 1, so..........
0.50 moles H2O ( 2 mole C2H2/2 mole H2O)
0.50 moles C2H2 needed
The molecular formula of water is H2O, showing that each molecule of water contains one oxygen atom. Therefore, 0.5 moles of water will contain 0.5 moles of oxygen atoms.
This is one to one.
0.50 moles H2O (1 mole O/1 mole H2O)
= 0.50 mole oxygen
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The answer is 0,5 moles oxygen.
.5?
0.515 moles
n-o no
The answer is o,5 moles MgO.
12 moles KClO3 (3 moles O/1 mole KClO3) = 36 moles of oxygen.
Each mole of PbO2 contains 2 moles of oxygen (O). Thus there would be 5.43x2 = 10.86 moles O.Each mole of water (H2O) contains 1 mole of O, so from 10.86 moles of O you could get 10.86 moles of H2O.
The chemical equation for the decomposition of H2O2 is 2 H2O2 -> 2 H2O + O2. This shows that two moles of H2O2 are required to produce each mole of O2. By definition, a 0.500 M solution of H2O2 contains 0.500 moles of H2O2 in each liter of solution. Solutions are always homogeneous; therefore, 50,0 mL of such a solution will contain (0.500)(50.0/1000) or 0.0250 moles of H2O2. As noted in the first paragraph, this will produce half as many, or 0.0125, moles of O2. The gram molar mass of O2 is twice the gram atomic mass of oxygen, or 31.9988. Therefore, decomposition of this amount of H2O2 will produce 31.9988 X 0.0125 or 0.400 gram of O2, to the justified number of significant digits.
moles of what?
0.515 moles
H2O2 is dissociate into water and oxygen.So fomula is H2O+O
n-o no
There are 0.003659 N2O moles. So there are o.007318 moles of N.
The answer is o,5 moles MgO.
12 moles KClO3 (3 moles O/1 mole KClO3) = 36 moles of oxygen.
3 moles of O, so that must be 6 moles of O2
Each mole of PbO2 contains 2 moles of oxygen (O). Thus there would be 5.43x2 = 10.86 moles O.Each mole of water (H2O) contains 1 mole of O, so from 10.86 moles of O you could get 10.86 moles of H2O.
2 moles of Na2O are produced. 4 moles of Na react with 1 mole of O.
How many moles of NH3 are produced when 1.2 mol of nitrogen reacts with hydrogen?