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Marrrta [24]
3 years ago
6

How many milliliters of 1.50 m hcl(aq) are required to react with 5.45 g of an ore containing 32.0% zn(s) by mass?

Chemistry
1 answer:
den301095 [7]3 years ago
3 0

Answer is: 33.34 milliliters of HCl.

Balanced chemical reaction: Zn(s) + 2HCl(aq) → H₂(g) + ZnCl₂(aq).

m(ore) = 5.45 g.

ω(Zn) = 32.0% ÷ 100%.

ω(Zn) = 0.32; mass percentage of zinc in an ore.

m(Zn) = ω(Zn) · m(ore).

m(Zn) = 0.32 · 5.45 g.

m(Zn) = 1.635 g.

n(Zn) = m(Zn) ÷ M(Zn).

n(Zn) = 1.635 g ÷ 65.38 g/mol.

n(Zn) = 0.025 mol; amount of the substance.

From chemical reaction: n(Zn) : n(HCl) = 1 : 2.

n(HCl) = 2 · 0.025 mol = 0.05 mol.

V(HCl) = n(HCl) ÷ c(HCl).

V(HCl) = 0.05 mol ÷ 1.50 mol/L.

V(HCl) = 0.033 L · 1000 mL/L.

V(HCl) = 33.34 mL; volume of hydrochloric acid.

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Answer:

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Explanation:

ionic bond

Because of the propensity of sodium to lose an electron and of chlorine to gain an electron, the elements are well suited to bond with one another. This transfer of electrons results in the formation of the ionic bond holding Na+ and Cl– together.

6 0
3 years ago
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The following chemical reaction occurs in a basic solution.
Dafna1 [17]

Answer:

6 moles of electrons

Explanation:

Let us consider the species NO3− and ClO−. The NO3− is oxidized to NO the oxidation number of nitrogen is decreased from +5 to +2.

The oxidation number of chlorine is increased from +1 to +3. This implies that six electrons were transferred in the balanced reaction equation shown in the question. Hence the answer.

3 0
3 years ago
It has been proven that North America is moving west about 2 cm per year. How many kilometers wouldn’t move in 5000 years
Viefleur [7K]
0.1 km

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7 0
3 years ago
At a certain temperature the rate of this reaction is first order in HI with a rate constant of :0.0632s
Shalnov [3]

Answer : The time taken for the reaction is, 28 s.

Explanation :

Expression for rate law for first order kinetics is given by :

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

where,

k = rate constant  = 0.0632

t = time taken for the process  = ?

[A_o] = initial amount or concentration of the reactant  = 1.28 M

[A] = amount or concentration left time 't' = 1.28\times \frac{17}{100}=0.2176M

Now put all the given values in above equation, we get:

0.0632=\frac{2.303}{t}\log\frac{1.28}{0.2176}

t=28s

Therefore, the time taken for the reaction is, 28 s.

8 0
3 years ago
15
Vinil7 [7]

Answer:

barium and silicon has same valence electrons

Explanation:

barium-2,8,18,18,8,2

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silicon-2,8,2,2

carbon-2,4

5 0
3 years ago
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