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exis [7]
4 years ago
5

Name the substances at home that remove rust, blood stains and ink stains

Chemistry
1 answer:
OleMash [197]4 years ago
5 0

Answer:

<u>White vinegar</u> removes rust.

<u>Hydrogen peroxide</u> removes bloodstains.

<u>Hairspray</u> removes inkstains.

Explanation:

You can use a number of household items to remove these types of stains, but I have listed the ones I have used personally to greatest success. With bloodstains, water usually works if you can get there fast enough before it dries. Milk apparently also works for inkstains, but I've never tried!

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Letter D

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A. star formation begins in a nebula.

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What element has 28 electrons when electrically neutral
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nickel

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How do ocean currents (specifically ocean gyres) impact climate
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Air at 293 K and 750 mm Hg pressure has a relative humidity of 80%. What is its percent humidity? The vapour pressure of water a
Mekhanik [1.2K]

Answer : The correct option is, (c) 79.62

Explanation :

The formula used for percent humidity is:

\text{Percent humidity}=\text{Relative humidity}\times \frac{p-p^o_v}{p-p_v}\times 100   ..........(1)

The formula used for relative humidity is:

\text{Relative humidity}=\frac{p_v}{p^o_v}       ...........(2)

where,

p_v = partial pressure of water vapor

p^o_v = vapor pressure of water

p = total pressure

First we have to calculate the partial pressure of water vapor by using equation 2.

Given:

p=750mmHg

p^o_v=17.5mmHg

Relative humidity = 80 % = 0.80

Now put all the given values in equation 2, we get:

0.80=\frac{p_v}{17.5mmHg}

p_v=14mmHg

Now we have to calculate the percent humidity by using equation 1.

\text{Percent humidity}=0.80\times \frac{750-17.5}{750-14}\times 100

\text{Percent humidity}=79.62\%

Therefore, the percent humidity is 79.62 %

4 0
4 years ago
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