Answer:
The answer to your question is: 1.205 x 10²³ atoms of Carbon
Explanation:
Data
Carbons atoms contained in 2.8 g C₂ H₄
MW C₂ H₄ = (12 x 2) + (4 x 1) = 24 + 4 = 28 g
28 g of C₂ H₄ ---------------- 24 g of carbon
2.8 g C₂ H₄ ----------------- x
x = (2.8)(24) / (28)
= 2.4 grams of C
1 mol ------------------- 12 g of Carbon
x ------------------- 2.4 g
x = (2.4x 1) / 12 = 0.2 mol
1 mol ----------------- 6.023 x 10 ²³ atoms
0.2 mol -------------- x
x = (0.2 x 6.023 x 10 ²³) / 1
= 1.205 x 10²³ atoms
Answer:
Numbers of red line are on the right, numbers of blue line are on the left.
The balanced chemical reaction for the substances given would be as follows:
Zn + 2HCl = ZnCl2 + H2
We are given the amounts of the reactants used in the reaction. We use these amounts to determine which is the limiting and excess reactant. We do as follows:
10 g Zn (1 mol / 65.38 g) = 0.1530 mol
10 g HCl (1 mol / 36.46 g) = 0.2743 mol
From the the stoichiometric ratio which is 1 is to 2, the limiting reactant would be hydrochloric acid and the excess would be zinc metal.
Mass of zinc that remains = 0.1530 - (0.2743 / 2) = 0.0159 g Zn
<u><em>Conduction</em></u> is your first answer. More examples are; touching a hot light bulb and walking on concrete in summer.
Your second answer is <u><em>C. Radiation</em></u>. More examples are; a sauna and a hot car motor.
Hope this helps!
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Answer:
Zinc, copper sulfate
Explanation:
The reactants are the ones on the left side