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natta225 [31]
3 years ago
14

Which of the following is an exothermatic reaction

Chemistry
1 answer:
ipn [44]3 years ago
5 0
C, oxidation of iron is the right answer because an exothermic reaction releases energy by light or heat!
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Give me two sources of air pollution ​
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Answer:

Explanation:

Types of Sources

There are four main types of air pollution sources: mobile sources – such as cars, buses, planes, trucks, and trains. stationary sources – such as power plants, oil refineries, industrial facilities, and factories. area sources – such as agricultural areas, cities, and wood burning fireplaces.

6 0
3 years ago
PLEASE HELP IM TAKING A TEST!!! Consider the reaction 4FeS2 + 11O2 → 2Fe2O3 + 8SO2. If 8 moles of FeS2 react with 15 moles of O2
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Answer:

c-)O2

Explanation:

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2 years ago
How many primary,secondary and Tertiary carbons are in the compound. 2,3-dimethyl pentane. And
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Answer:

5 primary carbon atoms

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Which of these is the second weakest of the four fundamental forces?
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7 0
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Read 2 more answers
If 62.3 mL of lead(II) nitrate solution reacts completely with excess sodium iodide solution to yield 0.862 g of precipitate, wh
Alexxx [7]

Answer:

The molarity of the lead(II) ion in the original solution is 0.03M

Explanation:

<u>Step 1:</u> The balanced reaction

Pb(NO3)2(aq) + 2 NaI aq) → PbI2(s) + 2 NaNO3 (aq)

Pb2+ + 2I- →PbI2

This means that for 1 mole Pb2+ consumed, there is needed 2 moles of I- to produce 1 mole of PbI2

<u>Step 2:</u> Calculate moles of PbI2

Moles of PbI2 = 0.862g / 461.01 g/mole

moles of PbI2 = 0.00187 moles

<u>Step 3:</u> calculate moles of Pb2+

For 1 mole of PbI2 produced we need 1 mole of Pb2+

This means for 0.00187 moles of PbI2 we need 0.00187 moles of Pb2+

<u>Step 4:</u> Calculate the molarity of the Pb2+ ion

Molarity of Pb2+ = moles of Pb2+ / volume =

Molarity of Pb2+ = 0.00187 moles / 62.3*10^-3

Molarity of Pb2+ ion = 0.03M

The molarity of the lead(II) ion in the original solution is 0.03M

5 0
3 years ago
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