You form water vapor by mixing oxygen and hydrogen at 730°c in a 5.4-liter container. this is the equation for the reaction: o2(g) + 2h2(g) → 2h2o(g). the partial pressure of oxygen before the reaction is 122.3 kilopascals, and there is excess hydrogen. how many moles of water are formed? the reaction produces moles of water.

The reaction is

Thus from each mole of oxygen we will get two moles of water, if we are taking excess of hydrogen. As we are taking hydrogen in excess the oxygen is the limiting reagent

Let us calculate the moles of oxygen used from ideal gas equation

PV=nRT

where

P = pressure = 122.3 kPascals = 1.21 atm

V = volume = 5.4 L

T = temperature ==1003K

n=moles=?

R=gas constant = 0.0821 Latm / mol K

putting values

therefore moles of water formed will be twice of moles of oxygen taken

0.158

Explanation:

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

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.