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zubka84 [21]
3 years ago
14

Which correctly describes the reaction between potassium and excess water?

Chemistry
1 answer:
nika2105 [10]3 years ago
7 0
Balanced chemical reaction: 2K(s) + 2H₂O(l) → 2KOH(aq) + H₂(g).

KOH is inorganic compound p<span>otassium hydroxide, a strong base.
H</span>₂ is hydrogen gas.
In balanced chemical reaction number of atoms on both side of chemical reaction must be same. There are two potassium atoms, four hydrogen atoms and two oxygen atoms on both side of reaction.
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The answer 
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XY  +  ZT --------------- XT + YZ  
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5 0
3 years ago
A sample of a substance has a mass of 27.3 grams and a volume of 7.0 centimeters3. The density of this substance is
lora16 [44]

Answer:

The density of the substance is 3.9 grams per cubic centimeter.

Explanation:

Given mass=27.3 grams

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Density of a substance can be calculated by dividing mass of substance by volume of a substance  

Density\ =\ \frac{mass}{volume}

\\Therefore\ density\ =\ \frac{27.3}{7} \ =\ 3.9\ \frac{gm}{cm^3}

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What does magnesium carbonate and hydrochloric acid make?
Lelechka [254]

Answer:

Magnesium carbonate reacts with hydrochloric acid to produce magnesium chloride, carbon dioxide, and water.

Explanation:

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