3 years ago

Which of the following is an example of a community nonpharmaceutica intervetion.

Chemistry

1 answer:

snow_lady [41]3 years ago

8 0

THE ANSWER IS B:Is disinfecting

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The only way to separate a compound into its elements is by what?

algol [13]

Electrolysis and heat can separate a compound into its elements.

I hope this helped you!

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3 years ago

A solution of NaOH has a concentration of 25.00% by mass. What mass of NaOH is present in 0.250 g of this solution? Use the peri

meriva

The concentration of NaOH is 25.00% by mass, it means that 25.00% of the mass of the solution is of NaOH. Hence:

$m_{NaOH}=25.00\%\times m_{solution}\Longrightarrow m_{NaOH}=\dfrac{25}{100}\times 0.250~g\iff\\\\\boxed{m_{NaOH}=0.0625~g}$

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3 years ago

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At what temperature do KCl and NaCl have the same solubility?

Serhud [2]

Answer:

they have the same molar solubility at 44.5 degrees celsius

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3 years ago

A sample of krypton gas with a volume of 10.00 L has a temp of 303 K and exerts

marshall27 [118]

<u>Answer:</u> The final volume will be 14.85 L.

<u>Explanation:</u>

To calculate the final volume when temperature increases, we use Charles' Law.

This law states that volume is directly proportional to the temperature of the gas if number of moles and pressure remains constant.

$V\propto T\\\\\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ = Initial volume and temperature

$V_2\text{ and }T_2$ = Final volume and temperature

We are given:

$V_1=10L\\
T_1=303K\\
V_2=?L\\
T_2=450K$

Putting values in above equation, we get:

$\frac{10L}{303K}=\frac{V_2}{450K}$

$V_2=14.85L$

Hence, the final volume of the gas is 14.85L

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3 years ago

Express 36,000,000 in scientific notation

NNADVOKAT [17]

Answer:

3.6*10^7

Explanation:

I hope this helped you... Have a nice day.. UWU

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3 years ago