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2 years ago

20 Which of these statements about plants are true?

Chemistry

1 answer:

solong [7]2 years ago

6 0

Answer:

C) 2 and 4 only

Explanation:

plants are the producers in a food chain

plants use sunlight for photosynthesis

You might be interested in

How does H2So4 break up to h+ & hso4 - ?

Katena32 [7]

H2So4 is a strong acid and a strong electrolyte which means that when this dissociates in water, the dissociation process is complete. The first dissociation is

H2 SO4 = H + HSO4-

This can further release H+ and dissociate SO4- instead already

4 0

3 years ago

How many liters of a 1.5 M solution can you make if you have .50 mol of KCl?

vaieri [72.5K]

Answer:

The answer to your question is 0.33 liters

Explanation:

Data

Volume = ?

Molarity = 1.5 M

number of moles = 0.5

Formula

$Molarity = \frac{number of moles }{volume}$

Solve for V

$Volume = \frac{number of moles}{molarity}$

Substitution

$Volume = \frac{0.5}{1.5}$

Simplification and result

Volume = 0.33 l

7 0

3 years ago

a pro golfer hits 45.0-gram golf ball, giving its speed of 75.0 m/s. what is the momenntum has the golfer given to the ball

AfilCa [17]

Momentum = mass x velocity. 45g = 0.045kg. 0.045 x 75 = 3.375 kgm/s

6 0

3 years ago

What type of organic molecule comprises the majority of a potato?

vladimir1956 [14]

Your answer should be Polysaccharides

MARK ME BRAINLIEST PLEASE!!!!!!!

8 0

3 years ago

A small hole in the wing of a space shuttle requires a 15.9 cm2 patch.

Rzqust [24]

The patch area in square kilometers is 1.59*10⁻⁹ km₂

Why?

This is an unit conversion problem. We have to convert from cm² to km². We can do that by knowing that there are 100 cm in 1 m, and 1000 m in 1 km, so 100000 cm=1km. Knowing that we can apply the following conversion factor:

$15.9 cm^{2} * (\frac{1 km}{100000 cm} )^{2}=0.00000000159 km^{2}$

Now to convert this value to scientific notation, we have to move the decimal point to the right until we get a whole number, and the exponent of the number 10 is going to be the number of spaces we moved to the right (negative), so the final answer is:

$0.00000000159 km^{2}=1.59*10^{-9} km^{2}$

Have a nice day!

#LearnwithBrainly

8 0

3 years ago