Answer is although the question should have 3 significant figures.
<h3>What is
significant figures?</h3>
Fe + CuSO4 --> Cu + FeSO4
It is already balanced
1 mol Fe : 1 mol CuSO4 : 1 mol Cu : 1 mol FeSO4
- atomic masses of Fe and Cu
Fe: 55.8 g/mol
Cu: 63.5 g/mol
number of moles = mass in grams / atomic mass = 93.7 g / 55.8 g/mol = 1.679 mol
1 mol Fe / 1 mol Cu => 1.679 mol Fe / 1.679 mole Cu
- mass of Cu in 1.679 moles Cu
mass = atomic mass * number of atoms = 63.5 g/mol * 1.679 moles = 106.6 g = 107 rounded to 3 significant figures.
To learn more about significant figures, refer to:
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Answer:
6.5
Explanation:
No of moles is the ratio of reacting mass to molar mass
RM - 270.4g
MM - 23+16+1= 40g/mol
270.4/40= 6.76mol
Answer:
the average distance of the outermost electron shell from. the nucleus.
Explanation:
Answer:
Option B: ΔH is (+); endothermic
Explanation:
From the reaction Cl2 → 2Cl(g) given, we can see that the number of moles on the left hand side is 1 while on right hand side, it is 2. This means the number of moles are increasing and it means that the randomness of the system has increased. Also, the bonds are being broken down.
Therefore, the reaction is endothermic. In endothermic reactions, ΔH is positive.
Thus, the correct option is option B.
No, many liquids have surface tension such as mercury.
