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Anettt [7]
4 years ago
13

What are some indicators that a chemical reaction is occurring? Check all that apply.

Chemistry
1 answer:
Olin [163]4 years ago
5 0

Answer: Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.

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I have four questions.
navik [9.2K]
Abca I think it’s right not sure
3 0
3 years ago
Read 2 more answers
Which element have the formula C6H12O6?​
nadya68 [22]

Answer: Glucose is a simple sugar with six carbon atoms and one aldehyde group.

Explanation: hope this helps you

4 0
3 years ago
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knowing that the reaction of potassium in water is extremely exothermic, what would be the problem with adding a large piece of
anygoal [31]

Answer:

Explanation:

If the reaction is really exothermic (and it is) then the water would spatter all over the place. It would boil off if the container could hold it. It would also react according to the following reaction.

You are talking about a reaction like

2K + 2HOH = 2KOH + H2

8 0
3 years ago
Will mark you brainliest and give you 15 points!!
Dafna1 [17]

Answer:

d

Explanation:

22.4 L is the same as 1 mol.

Diatomic nitrogen has a formula mass of 28.01 g/mol, so the answer is d.

7 0
2 years ago
A solution is prepared by diluting 43.5 mL of 6.5×10?2M Ba(OH)2 to a volume of 270.5 mL .
salantis [7]

Answer:

The pH of the solution is 12.31 .

Explanation:

Initial molarity of barium hydroxide =M_1=6.5\times 10^{-2}M

Initial volume of barium hydroxide =V_1=43.5 mL

Final molarity of barium hydroxide =M_2

Final volume of barium hydroxide =V_2=270.5 mL

M_1V_1=M_2V_2

M_2=\frac{6.5\times 10^{-2}M\times 43.5 mL}{270.5 mL}

M_2=0.0104 M

Ba(OH)_2\rightarrow Ba^{2+}+2OH^-

1 mol of barium gives 2 mol of hydroxide ions.

Then 0.0104 M of barium hydroxide will give:

2\times 0.0104 M=0.0208 M of hydroxide ions

[OH^-]=0.0208 M

pH=14-pOH=14-(-\log[OH^-])

pH=14-(-\log[0.0208 M])=12.31

The pH of the solution is 12.31 .

4 0
3 years ago
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