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Akimi4 [234]
3 years ago
5

What number would you write before water in the formula for calcium carbonate nonahydrate? 4 5 7 9

Chemistry
1 answer:
Sunny_sXe [5.5K]3 years ago
7 0
Nonahydrate means that there will be 9 water molecules attached to calcium carbonate

The correct answer is 9.
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3. Dorji was provided with four colourless solutions. He was asked to
givi [52]

Answer:

First, we can test Solution 1. We know that Sodium Hydroxide is a strong base. If we test acids on blue litmus paper, they will turn red. If we test bases on red litmus paper, they will turn blue.  So, you can test all the of the solutions- water, sodium hydroxide and hydrochloric acid with blue and red litmus paper. HCl, Hydrochloric acid is an acid, so it will turn blue litmus paper red. It will not turn red litmus blue. The acids will turn blue litmus paper red. The bases will turn red litmus paper blue. Only water is a neutral liquid, which will not turn blue litmus paper red or red litmus paper blue. It will not change the colour of it. Thus, if you test all the solutions with blue and red litmus paper, you will know which solution is water.  Water is the only one which is neutral. It is the only solution which cannot change the colour of any litmus paper. Thus, you can identify it very easily.  

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3 years ago
at what height is an object that has a mass of 16kg, if it’s gravitational potential energy is 7500J?
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Answer:

46.875

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h=46.875

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3 years ago
How many sulfur atoms are in 0.45 mol BaSO4??
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