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Bess [88]
3 years ago
7

If a decrease in temperature accompanies a reaction, what occurred?

Chemistry
2 answers:
Setler [38]3 years ago
6 0

Answer:

The correct answer is: D. Energy was absorbed.

Explanation:

I took the test and this was the correct answer.

Sliva [168]3 years ago
3 0

Answer:

Energy was released

Explanation:

Decrease in temperature means less energy, but the energy had to have been transferred because energy can't be destroyed or created. So if the temp. went down, energy must have been lost. (If it had been absorbed, the temp. would have gone up)

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adoni [48]
Magnesium, strontium and barium are a few of the elements that have the same properties as calcium. elements found in group 2 of the periodic table have similar properties to it.
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3 years ago
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Question 8 of 10
grandymaker [24]

Answer:

the solvent is collected as it is boiled off.

Explanation

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2 years ago
What elements does lithium resemble when it loses 1 electron?
Shkiper50 [21]

Answer:

helium

Explanation:

By losing an electron, they look like the noble gas that immediately precedes them on the periodic table.

7 0
3 years ago
22 You have the following acids and their conjugate bases available: Acetic Acid: CH 3COOH/CH3COO-; Ka = 1.8 × 10-5 Carbonic Aci
lana66690 [7]
Acetic acid is the closest to 4.5 in my opinion.
8 0
3 years ago
What is the ph of with a 4.6 x 10-6 M hydroxide ion concentration?
Lunna [17]
<h3>Answer:</h3>

pH = 8.66

<h3>Explanation:</h3>
  • The pH refers to the acidity or alkalinity of a solution.
  • It is calculated by getting the negative logarithm of Hydrogen ions concentration.
  • pH=-log[H⁺]

In this case;

we are given [OH⁻] as 4.6 x 10^-6 M

We are required to calculate the pH

We need to know that;

pH + pOH = 14

pOH = -log[OH⁻]

To get the pH we can calculate the pOH first,

pOH = -log[4.6 x 10^-6 M]

        = 5.34

but, pH + pOH = 14

Therefore, pH = 14 - pOH

                        = 14 - 5.34

                        = 8.66

Therefore, the pH of the solution is 8.66

4 0
3 years ago
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