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2 years ago

What type of element is Hydrogen? Where do you see hydrogen present?

Chemistry

1 answer:

PSYCHO15rus [73]2 years ago

8 0

/~\ The correct answer is:

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Hydrogen is a chemical and is found in the sun and most of the stars, and the planet Jupiter is composed mostly of hydrogen. On Earth, hydrogen is found in the greatest quantities as water.

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I hope this helps! /~\

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What does the prefix trans-indicate?

Mariana [72]

It means to change, and form means shape. So to transform is to change shape.

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2 years ago

Name three sources of CO2

dangina [55]

Answer:

1.Respiration of animals and plants.

2.The burning of fossil fuels.

3.Bacteria decompose corpses.

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2 years ago

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Consider the double replacement reaction given below: HgNO3(aq) + KBr(aq) → HgBr (??) + KNO3(??)The state of matter for HgBr wou

Andreas93 [3]

Answer: The state of maater for HgBr is solid.

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.

The balanced chemical equation is:

$HgNO_3(aq)+KBr(aq)\rightarrow HgBr(s)+KNO_3(aq)$

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2 years ago

How much energy is required to raise 10 grams of water by 10 degrees Celsius? (in Joules)

Georgia [21]

Answer:

420j

Explanation:

Heat capacity =10*4.2*10

=420j

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2 years ago

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When the equation __H2O2 --> __H2O + __O2 Is completely balanced, the sum of all the coefficients will be A) 5 B) 8 C) 3 D) 4

kkurt [141]

Answer:

A)5

Explanation:

2H2O2 --> 2H2O + 1O2

2+2+1=5

sum=5

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2 years ago