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pshichka [43]
4 years ago
9

Which statements about exothermic and endothermic reactions are correct? (its a multiple choice question)

Chemistry
1 answer:
geniusboy [140]4 years ago
5 0

Answer:

C)1 and 3 only☺️

Explanation:

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A few drops of food coloring are put into two containers of water. Observations are shown in the table. Which statement best exp
Svet_ta [14]

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C

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Increasing temp causes increased molecule movment in sample 2

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3 years ago
What color does ammonia change red cabbage juice into? and is the material an acid or an alkali?
notsponge [240]

Explanation:

Red cabbage contains a water-soluble pigment called anthocyanin that changes color when it is mixed with an acid or a base. The pigment turns red in acidic environments with a pH less than 7 and the pigment turns bluish-green in alkaline (basic), environments with a pH greater than 7.

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3 years ago
Based on the electron configuration of the elements below, answer the question. <img src="https://tex.z-dn.net/?f=%5E%7B12%7D_6C
maks197457 [2]

Answer:

The answer to your question is 12

Explanation:

Data

Number of electrons in Phosphorus 3+ ion

Process

1.- The sign of the number after the name indicates if the element has lost or gained electrons.

If the sign is positive the element has lost electrons

If the sign is negative the element has gained electrons.

2.- Phosphorus atomic number is 15, then the number of electrons in Phosphorus 3+ will be 12, in this example, Phosphorus lost 3 electrons.

4 0
3 years ago
How does the temperature and density change during convection​
Alex777 [14]

Answer:

Density changes with temperature because volume changes with temperature. Density is mass divided by volume. As you heat something up, the volume usually increases because the faster moving molecules are further apart. Since volume is in the denominator, increasing the volume decreases the density.

Explanation:

4 0
3 years ago
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NeX [460]

Answer:

??????????????

Explanation:

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3 years ago
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