The answer is B) Electrical outlets contain metal wires that are good conductors of electricity. In order to promote electrical safety, the parents covered the outlets with plastic, an insulator that prevents electrical current from flowing to another object.
ANSWERS:
1.
⇒ 2KCl +
2.
⇒
3.
⇒
4.
⇒
5.
⇒
I have attached my work for 1-3. I would like to see if you can get 4 and 5 on your own. but, if you are struggling/copnfused please let me know in the comments! :)
Answer:
Ca
Explanation:
Calcium atom has two electrons that are loosely attached to its outermost energy level. It easily looses these electrons during reactions than the other three elements ( aluminium,sodium and oxygen).
Ca₍aq₎⇒ Ca²⁺₍aq₎+2e⁻
Calcium ionizes by losing 2 electrons from its outer shell to form an ion with a charge of 2+
Answer:
14.29g
Explanation:
First, let us write a balanced equation for the reaction. This is illustrated below below:
4Fe + 3O2 —> 2Fe2O3
Next, let us calculate the mass of Fe that reacted and the mass of Fe2O3 produced from the balanced equation. This is shown below:
Molar Mass of Fe = 56g/mol
Mass of Fe from the balanced equation = 4 x 56 = 224g
Molar Mass of Fe2O3 = (56x2) + (16x3) = 112 + 48 = 160g/mol
Mass of Fe2O3 from the balanced equation = 2 x 160 = 320g
From the balanced equation,
224g of Fe produced 320g of Fe2O3.
Therefore, 10g of Fe will produce = (10x320)/224 = 14.29g of Fe2O3
From the calculations made above, 10g iron(Fe) produced 14.29g of iron(iii) oxide (Fe2O3)
