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Elina [12.6K]
3 years ago
15

Explain why plants need sunlight?

Chemistry
2 answers:
kolbaska11 [484]3 years ago
4 0
Plants need sunlight for photosynthesis.
torisob [31]3 years ago
3 0
Plants need sunlight in order to make photosynthesis.
They need it in order to make their energy, so it is basically their food source.
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A scientist formulates the following hypothesis: If plants of the same species
Blababa [14]

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Growth rate

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According to the hypothesis provided for this investigation, the scientist wants to determine if the amount of fertilizer plants of the same species receive will affect their growth rate when planted in the same condition. This shows that the independent variable is the amount of fertilizer to be used while the RESPONDING VARIABLE OR DEPENDENT VARIABLE is the GROWTH RATE OF THE PLANTS because it responds to the amount of fertilizer.

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3 years ago
A gas sample occupies 5.38L at 36.0C. what is its temperature if volume is changed to 4.86L
Alina [70]

Answer: 2.5°C

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Initial volume V1 = 5.38 liters

Initial temperature T1 = 36.0°C

Convert temperature in Celsius to Kelvin

(32°C + 273= 305K)

Final temperature T2 = ?

Final volume V2 = 4.68 liters

According to Charle's law, the volume of a fixed mass of a gas is directly proportional to the temperature.

Thus, Charles' Law is expressed as: V1/T1 = V2/T2

5.38/305 = 4.86/T2

To get the value of T2, cross multiply

5.38 x T2 = 4.86 x 305

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Divide both sides by 5.38

5.38T2/5.38 = 1482.3/5.38

T2 = 275.5K

Convert 275.5K to Celsius

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Thus, the final temperature is 2.5°C

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