3 years ago

An indicator was used to test a water solution with a pH of 12. Which indicator color would be observed?

Chemistry

1 answer:

juin [17]3 years ago

5 0

Answer:

4) pink phenolphthalein

Explanation:

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An unknown compound has the following chemical formula:

Softa [21]

Answer:

Formula of the compound = $P_2O_5$

Explanation:

Given,

No. of mole of O = 8.20 mol

No. of mole of P = 3.30 mol

Chemical formula = $P_2O_x$

Ratio of P and O = $\frac{2}{x}$

$\frac{2}{x} =\frac{3.3}{8.20} \\x \times 3.3 = 8.20 \times 2\\x = \frac{8.20 \times 2}{3.3} \\x=4.9969\\ = 5$

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Answer:

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When the calcium chloride dissolves. the calcium and chloride ions leave the surface of the solid and go into solution as hydrated ions.

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2 years ago

Have you ever thought about how an MP3 player works? What form of energy is used to power an MP3 player? What form of energy do

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Sound energy is what we get from an MP3 player

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In an exothermic reaction, the potential energy of the products is lower than that of the reactants. Which of the following is a

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The enthalpy change is negative. The other statements are false because: Can take place without a catalyst Energy is given out to the surroundings. Kinetic energy of products is higher.

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