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natima [27]
3 years ago
11

Hello, I really need help in this. I don't understand. :(

Chemistry
2 answers:
nexus9112 [7]3 years ago
4 0
The answer is b because, in order for it to get colder heat has to leave the atmosphere. This made the Earths system cooler.
leonid [27]3 years ago
3 0
The answer is b, because if it gets colder then means more heat is exiting than it is entering.
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Which of the following releases the greatest amount of energy as it proceeds? Assume the same mass of starting material is used
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I need help! what is the chemical makeup of hydrogen peroxide!! answer is worth 20 points. ¢¢
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A student observed a blue
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3 years ago
What benefits does sweet n low have
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3 years ago
A method used by the U.S. Environmental Protection Agency (EPA) for determining the concentration of ozone in air is to pass the
baherus [9]

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2. 90 mg

Explanation:

O_3(g)+2NaI(aq)+H_2O(l) \rightarrow O_2(g)+I_2(s)+2NaOH(aq)

According to stoichiometry:

1 mole of ozone is removed by 2 moles of sodium iodide.

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Thus 9.08\times 10^{-6} moles of sodium iodide are needed to remove 4.54\times 10^{-6} moles of O_3

2. \text{Number of moles of ozone}=\frac{0.01331g}{48g/mol}=0.0003moles

According to stoichiometry:

1 mole of ozone is removed by 2 moles of sodium iodide.

Thus 0.0003 moles of ozone is removed by =\frac{2}{1}\times 0.0003=0.0006 moles of sodium iodide.

Mass of sodium iodide= moles\times {\text {molar mass}}=0.0006\times 150g/mol=0.09g=90mg    (1g=1000mg)

Thus 90 mg of sodium iodide are needed to remove 13.31 mg of O_3.

3 0
3 years ago
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