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mrs_skeptik [129]
2 years ago
15

What part of the leaf is responsible for absorbing the sun’s energy?

Chemistry
1 answer:
never [62]2 years ago
3 0

Answer:chlorophyll

Explanation:

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Which buffer system is found in the human body?
AveGali [126]

Answer:

Bicarbonate buffer system

Explanation:

The human body uses a bicarbonate buffer system to maintain blood pH at a reasonable level. Without it, we'd be dead.

7 0
3 years ago
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When a counterfeit detection pen is used on an authentic bill, what color does it turn?
NeX [460]

Answer:

Explanation:

the answer is C, sometimes it can be brown

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3 years ago
Explain why water and sodium oxide will have very different properties
Softa [21]

Water and sodium oxide have different properties because of their nature as explained below.

<h3><u>Explanation:</u></h3>

Sodium oxide is a oxide of metallic sodium, while water is an oxide of hydrogen. So sodium oxide is a metallic oxide, while water is a non metallic oxide. Sodium oxide is a basic oxide, while water is neutral. As state of matter is concerned, sodium oxide is solid in normal room temperature, while water is liquid in normal room temperature. Water is a polar covalent molecule with partial charges on oxygen, but sodium oxide is an ionic molecule.

So all these factors contribute to very different properties of both sodium oxide and water.

4 0
3 years ago
A certain drug has a half-life in the body of 3.5h. Suppose a patient takes one 200.Mg pill at :500PM and another identical pill
tekilochka [14]

Answer:

The amount of drug left in his body at 7:00 pm is 315.7 mg.

Explanation:

First, we need to find the amount of drug in the body at 90 min by using the exponential decay equation:

N_{t} = N_{0}e^{-\lambda t}

Where:

λ: is the decay constant = ln(2)/t_{1/2}

t_{1/2}: is the half-life of the drug = 3.5 h

N(t): is the quantity of the drug at time t

N₀: is the initial quantity

After 90 min and before he takes the other 200 mg pill, we have:

N_{t} = 200e^{-\frac{ln(2)}{3.5 h}*90 min*\frac{1 h}{60 min}} = 148.6 mg

Now, at 7:00 pm we have:

t = 7:00 pm - (5:00 pm + 90 min) = 30 min

N_{t} = (200 + 148.6)e^{-\frac{ln(2)}{3.5 h}*30 min*\frac{1 h}{60 min}} = 315.7 mg    

Therefore, the amount of drug left in his body at 7:00 pm is 315.7 mg (from an initial amount of 400 mg).

I hope it helps you!

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2 years ago
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C :) shshdjehwjdjdjsjsjsbsbbsdp
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2 years ago
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