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34kurt
4 years ago
9

Which best explains how photosynthesis is helpful to humans? It reduces the amount of harmful rays released by the sun. It incre

ases the levels of carbon dioxide in the air. It provides oxygen for humans to breathe. It produces proteins, which humans can eat.
Chemistry
2 answers:
masya89 [10]4 years ago
8 0

Answer:I believe that the answer is c

Explanation: photosynthesis gives us oxygen to breath therefore it is helpful to humans

inysia [295]4 years ago
8 0

Answer:

c

Explanation:

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The independent variable is not dependent on the other observed variable in an experiment. So In this case, it is the amount of sugar as it does not change by the other variable in the experiment, i.e. the number of bees that visit the sample.

The other options are irrelevant in this experiment because they are not being studied.

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explain how solar radiation and convection currents on Earth. Describe how solar radiation and convection currents work together
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Convection is the transfer of heat energy in a fluid. ... Air in the atmosphere acts as a fluid. The sun's radiation strikes the ground, thus warming the rocks.

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3 years ago
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3 years ago
A sample of methane occupies a volume of 174.0 mL at 25 C and exerts a pressure of 1030.0 mmHg if the volume of the gas is allow
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The pressure will be 0,37 atm.

Explanation:

We use the Boyle Mariotte´s formula,where for a given mass of gas, at constant temperature, the pressure and temperature vary inversely proportionally. We see here that the initial and final temperature does not vary (298K).

We convert the unit Celsius into Kelvin (0 ° C = 273K) and the unite mmHg into atm (760mmHg=1 atm):

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We convert unit of volume from ml to L: 174/1000=0,174L and 650/1000=0,650L

P1xV1= P2xV2

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P2= (1,39 atm x 0,174L)/0,650L= 0,37 atm

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