Chemistry, 20.09.2019 10:00, kristine9683

What is the percent composition of ca(oh)2

Answers: 1

Show answers

Answers

answered: babymiche829

The percentage composition of CA(OH)2 is as follows;

54.05% Ca.43.24% O2.70% H

The percentage composition of Ca(OH)2 can be obtained by first determining the molar mass of Ca(OH)2 as follows;

Ca = 40O = 16H = 1

In essence, the molar mass of Ca(OH)2 is;

Ca(OH)2 = 40 + (16+1) × 2Ca(OH)2 = 74

Therefore;

% Ca = 40/74 × 100% = 54.05%% O = 32/74 × 100% = 43.24%% Ca = 2/74 × 100% = 2.70%

link

answered: 2003loganreed

% of Ca = 54.092 %.

% of O = 43.188 %.

% of H = 2.721 %.

Explanation:

The molar mass of Ca(OH)₂ = Atomic mass of Ca + (2 x atomic mass of O) + (2 x atomic mass of H) = 40.078 + (2 x 15.999) + (2 x 1.00798) = 74.09268 g/mol.To calculate the % composition of each element:For Ca:

% of Ca = (Atomic mass of Ca / Molar mass of Ca(OH)₂) x 100 = (40.078 / 74.09268) x 100 = 54.092 %.

For O:

% of O = (2 x atomic mass of O / molar mass of Ca(OH)₂) x 100 = (2 x 15.999 / 74.09268) x 100 = 43.188 %.

For H:

% of H = (2 x atomic mass of H / molar mass of Ca(OH)₂) x 100 = (2 x 1.00798 / 74.09268) x 100 = 2.721 %.

answered: Guest

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( $n_2$ ) .

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.

answered: Guest

Sorry i dont understand the question can you rephase it?

Other questions on the subject: Chemistry

Chemistry, 21.06.2019 14:00, kelyanthecrafte

Which of the following best defines homeostasis? forming identical cells breaking down glucose maintaining stable internal conditions increasing an organism's temperature

Answers: 3

continue

Chemistry, 22.06.2019 03:40, jude3412

In an effort to address concerns about global warming, a power plant in portland, oregon is designed to take all of its exhaust gases from its boilers and recycle the co2 using the solvay process to make sodium hydrogen carbonate. the reaction is shown below. nh3(g) + h2o(l) + co2(g) + nacl(aq) → nahco3(aq) + nh4cl(aq) how many liters each of nh3 and co2 (both at stp) would be consumed to produce 3.00 kg of sodium bicarbonate? the volume of both nh3 and co2 would be

Answers: 1

continue

Chemistry, 22.06.2019 06:10, gabriellestaleyga16

How many moles of gas are present if p=11 atm, v=12l, t=185k?

Answers: 1

continue

Chemistry, 22.06.2019 20:00, emilyswinge4421

Listenbase your answer to the question on the information below. nuclear radiation is harmful to living cells, particularly to fast-growing cells, such as cancer cells and blood cells. an external beam of the radiation emitted from a radioisotope can be directed on a small area of a person to destroy cancer cells within the body. cobalt-60 is an artificially produced radioisotope that emits gamma rays and beta particles. one hospital keeps a 100.0-gram sample of cobalt-60 in an appropriate, secure storage container for future cancer treatment. which choice represents the correct product for the beta decay of the co-60? fe-60ni-60fe-61ni-61

Answers: 2

continue

Do you know the correct answer?

What is the percent composition of ca(oh)2...