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Lostsunrise [7]
3 years ago
9

Explain why it is dangerous to burn a carbon-based fuel, such as propane or methane, in a closed room or building.

Chemistry
1 answer:
klasskru [66]3 years ago
6 0
Setting a fire too or burning substances such as propane or methane in a closed room/building can very easily cause an open flame or fire to the area because they are flammable substances 
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Which of the following is a product of aerobic respiration?
sasho [114]

Answer:

The product of aerobic respiration is Carbon dioxide.

Explanation:

  • The process of breaking down glucose to produce energy and waste products is called respiration. Livings beings need respiration process to generate energy so  that they can survive.
  • The types of respiration are : Anaerobic and aerobic respiration.
  • Aerobic respiration takes place in presence of oxygen and produces large amount of energy.
  • The final product of aerobic respiration are carbon dioxide, water and 38 ATP of energy.
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3 years ago
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An aqueous solution contains 32.7% KCl (wt/wt%). what is the mole fraction of KCl in the solution
inna [77]

The mole fraction of KCl in the solution is 0.1051

calculation

mole fraction of KCl in solution = moles of KCl / total number of moles(moles of KCl +moles of H2O)

moles=mass/molar mass

mass of KCl=32.7g

molar mass of KCl= 39 +35.5

moles of KCl is therefore= 32.7g/74.5 g/mol=0.439 moles

find the moles of H2O= mass of H2O/molar mass

mass of H2O=100-32.7=67.3g

molar mass of H2O=( 1 x2) +16=18 g/mol

moles = 67.3/18 =3.739 moles

total moles=3.739+0.439=4.178 moles

mole fraction is therefore=0.439/4.178=0.1051

5 0
3 years ago
Which answer below correctly identifies the type of change and the explanation for the boiling of water?
Feliz [49]

Answer:

physical change because even though gas formation was observed the water was undergoing a state change which means that it's original properties are preserved

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Write the balance nuclear equation showing the decay of zinc-69 to gallium-69
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It is a beta decay equation unknown

Explanation:

none

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Which of the following is an example that includes evidence of a chemical reaction?
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It is c took the test
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