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2 years ago

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

Chemistry

2 answers:

Setler [38]2 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]2 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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If you have a room that is 14 feet wide, 20.5 feet long, with 10 foot ceilings. What is the total

nikdorinn [45]

Answer:

i got 6

Explanation:

Because 14 feet divide by 20.5 gives you 0.6

so it 0.6 times 10 =6

4 0

1 year ago

Read 2 more answers

How long would it take for Hydrogen Peroxide to break down naturally (without an enzyme)

iogann1982 [59]

Answer:

Hydrogen peroxide is a very pale blue liquid at room temperature. A French scientist called Louis Auguste Thenard discovered the compound in 1818. Hydrogen peroxide can easily break down, or decompose, into water and oxygen by breaking up into two very reactive parts – either 2OHs or an H and HO2:

Explanation:

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2 years ago

Some commercially available algaecides for swimming pools claim to contain 7% copper. Could the method used in this experiment t

AleksandrR [38]

Answer:

Explanation:

7% copper implies 7 w/v%(weight/volume %) of copper. This implies a 100 mL algaecide arrangement contains 7 grams of copper.
Henceforth we have a thought of the measure of copper that ought to be available in a given example of algaecide.
Indeed, even a 1 mL algaecide test is sufficient to discover the percentage of copper in it.
so a 25mL sample of algaecide must have around 1.75g of copper.

4 0

3 years ago

How can an experiment support or fail support a hypothesis

melomori [17]

If a hypothesis is stated and outcome of the experiment is what was predicted, then it supports the hypothesis. if the experiment does not support the hypothesis, then the outcome was not what was predicted.

3 0

2 years ago

Since density depends on the mass and volume of an object, we need both of these values combined in the correct way to solve for

alukav5142 [94]

Answer:

7.86 g/cm³

Explanation:

11.0 kg = 11,000 g

The density in g/cm³ is ...

(11,000 g)/(1,400 cm³) = 7.86 g/cm³

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2 years ago