Mixture. Mixtures can be separated into their component parts, while substances are chemically bonded atoms that can't be separated by physical means.
Answer:
1.51× 10²³ C atoms
Explanation:
Given data:
Mass of CO₂ = 11 g
Number of atoms in 11 g of CO₂ = ?
Solution:
First of all we will calculate the number of moles of CO₂ .
Number of moles = mass/ molar mass
Number of moles = 11 g/ 44 g/mol
Number of moles = 0.25 mol
One mole of CO₂ contain 1 mole of C atom.
0.25 mole of CO₂ contain 0.25 moles of C atom.
The number of C atoms in 0.25 moles will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number
.
11 g of CO₂ = 0.25 moles of C = 0.25 × 6.022 × 10²³ C atoms
1.51× 10²³ C atoms
B. caulculating the distance between objects in the solar system
Answer:
Place two of them as reactants.
Explanation:
- We have the two steps of reactions:
1) N₂(g ) + O₂(g) → 2NO(g).
2) 2NO(g )+ O₂(g) → 2NO₂(g).
- Adding the two equation with cancelling the intermediate (NO), we get:
<em>N₂(g ) + 2O₂(g) → 2NO₂(g).</em>
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NO is cancelled out because there is one in each equation in the products side in eq. 1 and in oriduct side in eq. 2.
<em>So, we place two of oxygen as reactants.</em>
Answer:
Insertion is a type of mutation involving the addition of genetic material. An insertion mutation can be small, involving a single extra DNA base pair, or large, involving a piece of a chromosome.
Explanation:
