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inna [77]
3 years ago
13

This problem is from a New York Times article. Researchers tested a group of 28 doctors. The doctors were told that a 5-year-old

child suffering a potentially fatal allergic reaction to peanuts needed an emergency injection of 0.12 mg of epinephrine. The bottle of epinephrine is labeled 1 mg in 1 mL of solution. What volume of this solution would you inject if you were the doctor
Chemistry
1 answer:
telo118 [61]3 years ago
7 0

Answer:

0.12 mL of the epinephrine solution.

Explanation:

We have:

A bottle of epinephrine labeled 1 mg in 1 mL of solution,

We need to prepare:

An injection of 0.12 mg of epinephrine

Hence:

\frac{1 mL}{1 mg}*0.12 mg = 0.12 mL

Therefore, to prepare an injection of 0.12 mg of epinephrine labeled 1 mg in 1 mL we need to inject 0.12 mL of the epinephrine solution.          

I hope it helps you!

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QUICK PLEASE
Trava [24]

Answer: 2.52 M

Explanation:

The product of molarity (moles/litre) and volume in litres yields moles, and the numbers of moles in two solutions means dilute and concentrated are equal, which is expressed by the following equation: 

M_1V_1=M_2V_2

$$Given that\\M $1=12.0 \mathrm{M}$ or mole $/ \mathrm{L}$\\$\mathrm{V} 1=420 \mathrm{ml}$\\$\mathrm{M} 2=$ ?\\$\mathrm{V} 2=2.0 \mathrm{~L}$ or $2000 \mathrm{ml}$\\\\$\mathrm{M} 1 \mathrm{~V} 1=\mathrm{M} 2 \mathrm{~V} 2$\\$\mathrm{M} 2=\mathrm{M} 1 \mathrm{~V} 1 / \mathrm{V} 2$\\$=12.0 * 420 / 2000$\\$=2.52 \ \mathrm{M}$

3 0
2 years ago
A pendulum bob at its highest point has a certain amount of potential energy. As it falls, what does the potential energy get tr
Lisa [10]
Good

Because is that true
3 0
3 years ago
Hydroxyapatite, Ca 10 ( PO 4 ) 6 ( OH ) 2 , has a solubility constant of Ksp = 2.34 × 10 − 59 , and dissociates according to Ca
GenaCL600 [577]

Answer: 4M

Explanation:

5 0
3 years ago
Nitrogen (N2) and hydrogen (H2) react to form ammonia (NH3). Consider a mixture of six nitrogen molecules and six hydrogen molec
Nezavi [6.7K]

Answer:

a)  No molecules of hydrogen

b) four molecules of ammonia

c) four left molecules of nitrogen.

Explanation:

The balanced reaction between nitrogen and hydrogen molecules to give ammonia molecules is:

N_{2}(g)+3H_{2}(g) -->2NH_{3}

Thus one molecule of nitrogen will react with three molecules of hydrogen to give two molecules of ammonia.

We have six molecules of each nitrogen and hydrogen in the closed container and they undergo complete reaction it means the limiting reagent is hydrogen. For six molecules of nitrogen, eighteen molecules of hydrogen will be required.

So six molecules of hydrogen will react with two molecules of nitrogen to give four molecules of ammonia.

The product mixture will have

a) No molecules of hydrogen

b) four molecules of ammonia

c) four left molecules of nitrogen.

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Which of these is not an example of a molecule?
r-ruslan [8.4K]

Answer:

D

Explanation:

5 0
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