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2 years ago

química: compara y contrasta la investigación básica, investigación aplicada y el desarrollo tecnológico. razonamiento crítico.

Chemistry

1 answer:

mihalych1998 [28]2 years ago

7 0

This isn’t anything related to chemistry dude

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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]

Answer: 1. $9.08\times 10^{-6}$ moles

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.

Thus $4.54 \times 10^{-6}$ moles of ozone is removed by = $\frac{2}{1}\times 4.54 \times 10^{-6}=9.08\times 10^{-6}$ moles of sodium iodide.

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 $O_3$ .

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2 years ago

What is in a microscope the enlarges things so our eye can see them?

Fittoniya [83]

Answer:lenses

Explanation:

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Molecules that contain nothing but hydrogen and carbon are

romanna [79]

Hydrocarbons. They usually burn. In fact, I can't think of one that does not.

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Which element has a grater atomic radius ?phosphorus or bismuth?

LuckyWell [14K]

According to periodic trends, bismuth has the greatest atomic radius.

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2 years ago

Hii pls help me to balance chemical equation

Dominik [7]

Answer:

1 Ca(OH)2 + 2 HCl ---> 1 CaCl2 + 2 H2O

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2 years ago

química: compara y contrasta la investigación básica, investigación aplicada y el desarrollo tecnológico. razonamiento crítico.​

química: compara y contrasta la investigación básica, investigación aplicada y el desarrollo tecnológico. razonamiento crítico.