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SVETLANKA909090 [29]
3 years ago
9

Use the following graph of a car traveling on a straight northerly path to answer this question. At what time would the

Chemistry
1 answer:
BARSIC [14]3 years ago
6 0

Answer:

B 144.0 s is the best answer of this question

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How many carbon atoms are there in 45g of carbon?
nevsk [136]

Answer: 2.26x 10²⁴ atoms C

Explanation: To get the number of atoms,

First we convert mass of C to moles

45g C x 1mole C / 12 g C

= 3.75 moles C

Cancel g of C

Next convert moles of C to atoms using Avogadro's Number.

3.75 moles C x 6.022x10²³ atoms C / 1 mole C

Cancel out the units of moles C.

= 2.26x 10²⁴ atoms of C

3 0
3 years ago
Why is photosynthesis an endothermic reaction?
diamong [38]

Answer: Option (c) is the correct answer.

Explanation:

Photosynthesis is a process in which sunlight, carbon dioxide, and water is used by the plants to make their on food.  

Plants absorb energy in the form of heat from the sunlight and thus produce glucose and oxygen from carbon dioxide and water. This absorbed energy is then used to start various chemical and biochemical reactions in the plants.

Hence, photosynthesis is an endothermic reaction.

Thus, we can conclude that a large amount of energy is required to activate the reaction.

4 0
3 years ago
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What does gravity mapping show?
Sati [7]
The Answer is C . The differences in the magnetic force from place to place .
5 0
3 years ago
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A wave with a height of 10 feet and wavelength of 20 feet has a wave base of
SCORPION-xisa [38]
<h3><u>Answer;</u></h3>

10 ft

<h3><u>Explanation;</u></h3>

The wave base of a wave is the depth at which there is no more perturbation of the medium caused by the wave. The wave base of a wave is determined to be half the wavelength of the wave itself.

Therefore;

Wave base = wavelength/2

                   = 20 ft/2

                  <u> = 10 ft</u>

4 0
3 years ago
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Which of the following is an example of a conversion from electrical energy to sound energy? microphone radio generator windmill
9966 [12]
Speakers converts electrical energy into sound energy.  So I think it would be radio. Hope this helps

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3 years ago
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