Biology, 28.07.2019 06:00 helpmeplzandty
What must happen before a chemical reaction can begin? the activation energy must be exceeded. the activation energy must be reached. the concentrations of products and reactants must be equal. the concentration of reactant molecules must be reduced.
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Biology, 22.06.2019 20:00
Which does not describe a physical change happening to water? water evaporating in the sun water reacting with nitrogen gas water freezing and being broken apart with a knife water heating up on a stove
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Biology, 22.06.2019 21:00
Brass gets discoloured in air because of the presence of which of the following gases in air? a. oxygen b. hydrogen sulphide c. carbon dioxide d. nitrogen
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Biology, 22.06.2019 21:00
Me what would happen if a plant could carry out photosynthesis, but not respiration? question 1 options: it would have no food. it would have too much water. it would be unable to capture the energy in sunlight. it could make food but not break it down for energy.
Answers: 1
What must happen before a chemical reaction can begin? the activation energy must be exceeded. the...
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