Hydrogen gas is collected by water displacement. If the barometric pressure is 752.0 torr and the water vapor pressure is 17.5 torr, what is the partial pressure of the hydrogen collected

734.5 torr

Explanation:

Let's find the difference between the barometric pressure and the water vapour pressure

Bp = 752 torr

Wp = 17.5 torr

Bp - wp

752- 17.5 = 734.5 torr

The partial pressure of the hydrogen collected is 734.5 torr

Explanation:The partial pressure of the hydrogen collected can be calculated using Dalton's law of partial pressure. Dalton's law of partial pressure states that  in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases.

Mathematically,

P(total) = P1 + P2 + P3 + ... + Pn

From the question,

Parameters given:

Barometric pressure (Total pressure) = 752.0 torr

Water vapour pressure = 17.5 torr

Partial pressure of hydrogen = ??

Using,

P(total) = P(water vapour) + P(Hydrogen)

752.0 torr = 17.5torr + P(Hydrogen)

P(Hydrogen) = 752.0 torr - 17.5 torr

P(Hydrogen) = 734.5 torr

Therefore the partial pressure of the hydrogen collected is 734.5 torr

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.