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fgiga [73]
4 years ago
15

What is an indicator that a chemical change has occurred?

Chemistry
2 answers:
LenaWriter [7]4 years ago
7 0

Answer: a change in energy

Explanation:

Aleks04 [339]4 years ago
6 0

Answer:

That something has changed chemically

Explanation:

Uh...Google it

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3 years ago
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What type of reaction is represented by the following example? 2CO2 (g) + 4H2O (l) + 1452 kJ 2CH3OH (l) (g) + 3O2 (g) exothermic
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endothermic  

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3 years ago
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Write three disadvantages of hard water.​
frez [133]

The three disadvantages of hard water are:

1. Hard water is unsuitable for washing because soap does not readily create a lather in it.

2. Soap may react and produce, wasting the soap.

3. Due to the development of calcium and magnesium carbonates, tea kettles will get furred.

<h3>Hard water</h3>

Water that contains a lot of minerals is referred to as hard water. In limestone, chalk, or gypsum deposits, which are mostly composed of calcium and magnesium carbonates, bicarbonates, and sulphates, hard water is created as a result of percolation. A moderate health advantage from drinking hard water is possible. In industrial settings where water hardness is regulated to prevent expensive breakdowns in boilers, cooling towers, and other water-handling equipment, it can present serious issues. Hard water is frequently detected in home settings by the build-up of lime scale in kettles and water heaters as well as by the absence of foam when soap is agitated in water. Wherever there is a worry about water hardness, water softening is frequently employed to lessen the negative impacts of hard water.

write three disadvantages of hard water.​

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8 0
1 year ago
Why do some elements that are classified as metals not look metallic?
Shkiper50 [21]

Answer:

So, that students like us get confuse!!!

Explanation:

6 0
3 years ago
Pick a key concept that you understand well and explain it in a way that an elementary school student could understand.
Gwar [14]
Colors!!
We know about all the colors in the rain bow but do you know how most of them are made?

Red and blue and yellow can make sooooo many different colors if you mix them together.

For example red + blue = purple! This is because red, blue and yellow are primary colors and these colors are colors that can make up other colors.
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4 years ago
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