Salt is a pure substance because it it a compound. It can not be broken down any further. Milk is not a pure substance because it is a mixture and can still be broken down. It is made up of many elements. Hope this helps!!!
Answer:
(i) Formula = Fe₂(SO₄)₃
Name = Iron (III) Sulfate or ferric sulfate
(ii) Formula (NH₄)₂CO₃
Name = Ammonium Carbonate
Explanation:
Data given:
(i) Fe³⁺ and SO₄²⁻
ii) NH₄⁺ and CO₃²⁻
Formula and named of the compound =?
Solution:
(i) compound from Fe³⁺ and SO₄²⁻ and its name
writing a formula in combined form
- The symbols of two ions written together that is FeSO₄
- The charges shown on each atom is its valency and it show its combining tendency so iron will combine with 3 sulfate ions and sulfate ion will combine with 2 iron ions
- When two ions combine their valencies should be write on the base of the alternate ions.
- that is 2 will be at the base of Fe and 3 will be at the base of SO₄ without charges
- So the combined formula and name will be
compound formula form from Fe³⁺ and SO₄²⁻ = Fe₂(SO₄)₃
Name of the compound = Iron (III) Sulfate or ferric sulfate
______
(ii) compound from NH₄⁺ and CO₃²⁻ and its name
writing a formula in combined form
- The symbols of two ions written together that is NH₄CO₃
- The charges shown on each atom is its valency and it show its combining tendency so NH₄⁺ will combine with 1 carbonate ion and carbonate ion will combine with two NH₄⁺ ions
- When two ions combine their valencies should be write on the base of the alternate ions 1 should not be written.
- 2 will be at the base of NH₄⁺ without charge
- So the combined formula and name will be
compound formula form from NH₄⁺ and CO₃²⁻ = (NH₄)₂CO₃
Name of the compound = Ammonium Carbonate
When we have this equation:
CO(g) + Cl2(g) ↔ COCl2(g)
intial 0.147 0.175 0
change -X -X +X
final (0.147-X) (0.175-X) X
so from the ICE table, we substitute in Kc formula :(when we have Kc = 255)
Kc = [COCl2]/[CO][Cl2]
255= X / (0.147-X)(0.175-X)
255 = X / (X^2 - 0.322 X + 0.025725)
X = 0.13
∴[CO] = 0.147 - X = 0.147 - 0.13
= 0.017 m
Answer:
Gas giants.
Explanation:
Jupiter, Saturn, Uranus, and Neptune are the gas giants of our solar system.
a. Group 2
b. Metal
a. The current highest numbered element known is Oganesson with an atomic number of 118 and it's the last period 7 element in group 18 (Noble gases). The hypothetical element number 120, would be the 2nd element in period 8 and the described electron configuration matches other group 2 elements such as Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium.
b. The hypothetical element would be quite similar to the other group 2 elements which are the alkaline earth metals. The element would be expected to be a bit more reactive than Radium.