Generally, 60% of the mass of body is water.
So, amount of water in 100 kg person is:
In order to calculate the mass of a person if all the water were removed, then:
Mass of the body = 
[
Mass of the content of water in the body = 
Substituting the values:
Mass of a person if all the water were removed = 
.
Hence the mass of a person who weighs will weigh 
if all the water were removed from the body.
6.
7. 6 × 7 = 42
42 ÷ 10 = 4,2 Pizzas
You need to buy 4 or 5 Pizzas.
They are attracted by the shared pair of electrons. One requires one more electron and the other atom shares one electron with the other, making the atoms come together and stay.
I think it’s D hope that helped
Answer:
- <em>There are </em><u><em>4 moles</em></u><em> of chloride ions in 2 moles of calcium chloride.</em>
Explanation:
Start by writing the chemical formula of calcium chloride.
The suffix -ide in chloride means that chlorine is working as the ion Cl⁻, this is with oxidation state -1.
Calcium, being an alkaline earth metal, uses oxidation state +2, Ca²⁺
Then, two atoms of Cl are combined with one atom of calcium, because in this way each Cl atom will accept one electron from a Ca atom, which will donate its two valence electrons.
That is indicated in the chemical formula with subscripts: <u><em>CaCl₂</em></u>, meaning that each formula-unit of calcium chloride has 2 ions of chlorine and 1 ions of calcium, or twice the number of moles of chloride ion.
- 1 mol CaCl₂ : 1 mol Ca⁺ : 2 mol Cl⁻
⇒ 2 mol CaCl₂ : 2 mol Ca⁺ : 4 mol Cl⁻
Hence, there are 4 moles of chloride ions in 2 moles of calcium chloride.
