Determine the moles of oxygen gas (O2) needed to completely react with 1.975 moles of hydrogen gas (H2). Final answers should be reported with the correct number of significant digits. H2 (g) + O2 (g) ⟶ H2O (g)

0.9875 moles of O₂

Explanation:

The reaction for production of water is:

2H₂ + O₂ → 2H₂O

By stoichiometry, 2 moles of hydrogen need 1 mol of oxygen to react.

Then, we can make the following rule of three:

If 2 moles of H₂ need 1 mol of O₂ to react

Then, 1.975 moles of H₂ will need ( 1.975 . 1) /2 = 0.9875 moles of O₂

answer is d because it is trust me

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.