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Sever21 [200]
3 years ago
7

I need help with this question... phenobarbital elixir contains 2 grams in 1 liter of elixir. How many milligrams of phenobarbit

al are contained in 1 teaspoon of elixir?
Mathematics
2 answers:
posledela3 years ago
8 0

To solve this problem, all we need is the conversion factor.

We know that there are:

1 liter = 202.884 teaspoons

 

Therefore the mass of Phenobarbital is:

mass = (2 grams / 1 Liter) * (1 teaspoon) * (1 Liter / 202.884 teaspoons)

<span>mass = 0.00986 g = 9.86 x 10^-3 g = 9.86 mg</span>

Bas_tet [7]3 years ago
3 0

Answer:

9.86 milligrams

Step-by-step explanation:

It is given that 1 liter f elixir contains 2 grams of phenobarbital elixir.

Since 202.884 teaspoons = 1 liter

so 1 teaspoon of elixir =  \frac{1}{202.884} liter

∵ 1 liter of elixir contains phenobarbital = 2 gms.

∴  \frac{1}{202.884} liter of elixir contains phenobarbital =  \frac{2*1}{202.884} = 0.009858 grams

or 0.009858 × 10³ milligrams

 = 9.86 milligrams.

Therefore, 9.86 milligrams of phenobarbital will be required.

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2 years ago
Abby is surveying people in the city about their interest in a new shopping mall. She found that 180 people, or 37.5% of those s
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3 years ago
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Answer:

a.) The sum of the weights of the two in insects is 0.0031 grams. (0.0031 grams)

b.) The fly is 0.0013 grams heavier than the gnat. (0.0013 grams)

Step-by-step explanation:

2.2 * 10^-3 = 2.2 * 1/1000 which is 2.2/1000.

9 * 10^-4 = 9 * 1/10000 = 9/10000

To add 9/10000 to 2.2/1000 we have to find the common denominator, which will be 10000.

So we do:

2.2/1000 * 10/10 = 22/10000

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The sum of the weights of the two in insects is 0.0031 grams.

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7 0
3 years ago
What is the measure of A? And B
sladkih [1.3K]

Answer:

A = 72°

B = 108°

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5y - 3y = 27 + 3

2y = 30

y = 30/2

y = 15

A = 5y - 3

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A = 72°

A + B = 180°

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