CHEMISTRY HIGH SCHOOL

Is combustion an example of the law of conservation of matter and why?

Answers

Answer 1
Answer:

Answer:

Explanation:

The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted.

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According to the Arrhenius Theory a base reacts with an acid to produce

Balance this equation please.

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2K + 2H2O = 2KOH + H2
2K + 2H2O = 2KOH + H2  Actually Really what That other guy said

How many meters in 1000 mm

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1000 mm equals 1 meter
1000 mm equals 1 meter. 

What was the minimum temperature to the nearest degree for the thermometer shown here? / a. +16ºC b. +4ºC c. -13ºC d. -6ºC

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A figure of the thermometer for this problem is not given so I cannot really give a specific answer. Maybe this would help. The minimum temperature would be the lowest reading possible in the thermometer. Most probably it is option C or D. Hope this helps.

Answer:

A figure of the thermometer for this problem is not given so I cannot really give a specific answer. Maybe this would help. The minimum temperature would be the lowest reading possible in the thermometer. Most probably it is option C or D. Hope this helps.

Oceans, lakes, ice caps, streams, and clouds are considered to part of what?A. Biosphere
B. Athenosphere
C. Hydrosphere
D. Geosphere

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Hydrosphere is the correct option.Oceans, lakes, icecaps, streams and clouds are considered to be part of hydrosphere. The correctoption in regards to the given question is option “C”.Hydrosphere includes the total mass of water on the surface,underground or over the surface of earth. About 75% of the earth’s surface arecovered by oceans and so a huge part of our planet is covered in water and so hydrosphereis an important aspect. Hope I have answered your question as per your asking.
Answer=C

The hydrosphere is the total amount of water on the planet, encompassing water underground, on the surface of the planet, and in the air. This would include oceans, lakes, ice caps, streams and clouds.

Which solution reacts with LiOH(aq) to produce a salt and water?

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2 LiOH + H₂SO₄= 2 H₂O + Li₂SO₄

is sulfuric acid ( H₂SO₄) producing H₂O and Li₂SO₄ ( Lithium sulfate)

hope this helps!

2.0 g of H2 gas reacts with 32 g of O2 gas to form water. Assuming the reaction goes to completion, how many grams of water will be produced?

Answers

In order to solve this problem, the balanced chemical equation of the reaction must be used. This gives the equation:

2H2 + O2 --> 2H2O

Next, the moles of the reactants must be used in order to apply their stoichiometric relationships. Note that 1 mole of oxygen needs 2 moles of hydrogen for the reaction proceed. Since there is only 1 mole of H2, only 0.5 moles of oxygen are consumed.

moles H2 = 2 g/ 2g/mol = 1 mole H2
moles O2 = 32 g/ 32g/mol = 1 mole O2

        2H2 + O2 --> 2H2O
i          1       1           0
c         1      0.5         1
e         0      0.5        1
 
 Assuming the reaction will proceed, there will be an excess of 0.5 mol O2 and a product of 1 mol H2O. This gives 18 grams of water. 
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