Chemistry, 05.01.2020 18:31 Grayvtrain555

Hydrogen reacts with oxygen to form only water. if 16 grams of hydrogen is mized with 16 grams of oxygen, how much water can form

Answers: 1

Show answers

Answers

The balanced chemical equation will tell you the molar ratios in which hydrogen and oxygen react to form water:

2H2 + O2 > 2H2O

Then the ratio is 2 mol of H2 react with 1 mol of O2 and form 2 mol of H2O:

2 : 1 : 2

Now convert the given data into moles:

16 grams of H2 = 16 g / 2 g/mol = 8 mol

16 grams of O2 = 16 g / 16 g/mol = 1 mol.

Then you have that the 1 mol of oxygen will react with 2 moles of hydrogen and they will form 2 mol of H2O.

And you can calculate the mass of 2 moles of H2O by multiplying by its molar weigth: 18 g/mol.

2 mol H2O * 18 g/mol = 36 grams of water.

Then, the answer is 36 grams of H2O.

Answer from: mel4245

The reaction is:
$2 H_{2} + O _{2} -\ \textgreater \ 2 H_{2} O$
When molecular hydrogen ( H2) and oxygen ( O2 ) is combined they form either water or hydrogen peroxide.
We have that mass of hydrogen is 16 g and mass of oxygen is 16 g. But O2 is the limiting reactant. Let`s see how much grams of hydrogen can be used for this reaction:
16 g O2 x (1 mol O2)/ (32 g O2) x ( 2 mol H2)/(1 mol O2)x (2 g H2) / (1 mol H2) = 2 g H2
Finally: 16 g + 2 g = 18 g.
C. 18 grams of water.

Answer from: Quest

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

Answer from: Quest

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.