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Dima020 [189]
3 years ago
8

1 2. How does a detergent remove a stain? ?

Chemistry
1 answer:
Masteriza [31]3 years ago
4 0

Answer:

By using various chemical compounds to lift the stain while being gentle enough to keep fabric intact.

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What type of solution is seltzer water? a liquid-liquid b metal-liquid c gas-liquid
Darya [45]

Answer:

(I think its mixture not solution)

Explanation:

Multiphase Mixtures

Carbonated water (or carbonated anything) is a multiphase heterogenous mixture, with gaseous carbon dioxide (CO2) bubbling through liquid water (H2O).

6 0
3 years ago
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Which is one way that analyzing ice benefits scientists who study ancient climates?
Ludmilka [50]

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7 0
3 years ago
If the heat of combustion of hydrogen gas (H) is –285.8 kJ , how many grams of H must combust in order to release
kifflom [539]

4.2 g of hydrogen is required to release 1.2 x 10^3 kJ of heat.

Given from the question that 1 mole of hydrogen gas contains 2 g of hydrogen gas.

We also know that heat of combustion per mole of hydrogen gas –285.8 kJ.

From the question, we are told that heat released by the reaction is -1.2 x 10^3 kJ of heat.

Hence;

If 2g of hydrogen releases –285.8 kJ of heat

x g of hydrogen releases  -1.2 x 10^3 kJ of heat

x g = 2g  x  -1.2 x 10^3 kJ / –285.8 kJ

xg = 4.2 g of hydrogen

Learn more: brainly.com/question/1527403

7 0
3 years ago
How many grams of CO2 are produced when 6.55 of Fe2O with an excess of CO?
Anettt [7]

Answer:

the answer is fe20 Hope this helps!

Explanation:

5 0
3 years ago
How does the energy of an electron change when the electron moves closer to the nucleus?
tankabanditka [31]
It increases. B.

Close to the nucleus are high energy levels, because of the pull of the nucleus.  But farther away from the nucleus, the electrons there are of low energy level.
5 0
4 years ago
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