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Sagot :
For a balanced reaction equation, the number of atoms on each side of the reaction equation must be the same.
From the equation shown in question 4 , there will be an extra molecule of O2 left over because the number of atoms of each element on the right hand side of the reaction equation must be the same as the number of atoms of the same element on the left hand side of the reaction equation. This is what makes a balanced reaction equation.
The procedure that could be used to demonstrate that matter is conversed during a physical change is to find the mass of a piece of ice, let the ice melt then find the mass of the liquid water.
In the reaction; 2KCl + Br2 ------> 2KBr + Cl2, there are six atoms present in the product according to the balanced reaction equation shown.
Learn more: https://brainly.com/question/9743981
Answer:
see below
Step-by-step explanation:
1. There is an extra O2 molecule left over.
2. Covalent bonds tend to be less polar than ionic bonds.
3. PH3
4. replacement
5. Potassium is more reactive than hydrogen.
6. Each carbon atom would share one pair of electrons with hydrogen and three pairs with the other carbon atom.
7. H2SO4 + 8HI → H2S + 4I2 + 4H2O
8. 2, 1, 2
9. Nitrogen and oxygen have an electronegativity difference of 0.5, so the bond is polar covalent, with oxygen pulling the electrons toward it.
10. Sodium donates an electron to chlorine.
11. selenium (Se)
12. bond type
13. six
14. K
15.indicator
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