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2 years ago

What is the volume of 3.89 grams of helium gas?

Chemistry

1 answer:

lukranit [14]2 years ago

7 0

Answer: There are 971.77 millimoles in 3.89 grams of Helium

Explanation:

i think its right im not really sure

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An ideal gas is in a sealed rigid container. The average kinetic energy of the gas molecules depends most on An ideal gas is in

sergejj [24]

Answer:

The temperature of the gas.

Explanation:

According to the kinetic molecular theory, the molecules of a substance are in constant random motion.

If an ideal gas is contained is a sealed rigid container, the average velocity of the gas molecules is dependent of the temperature of the gas.

Recall that temperature is defined as the average kinetic energy of the molecules of a body.

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2 years ago

If 185 mg of acetaminophen were obtained from a tablet containing 350 mg of acetamino- phen, what would be the weight percentage

Alex73 [517]

Percentage recovery gives us an idea of the amount of pure substance recovered after the chemical reaction. Percentage recovery can be more than 100 % or less than 100 %. Usually, in any experiment performed the weight percentage recovery will be less than 100. Percent recovery values greater than 100 show that the recovered compound is contaminated.

Amount of acetaminophen initially taken = 350 mg

Amount of acetaminophen obtained after recovery =185 mg

$Weight percentage recovery =\frac{mass recovered}{mass originally taken}*100$

= $\frac{185 mg}{350 mg}*100$

= 52.9%

8 0

2 years ago

What is the mass of a magnesium block that measures 2.00 cm

skad [1K]

Answer:

m = 31.284 grams

Explanation:

Given that,

The dimension of a magnesium block is 2.00 cm x 3.00 cm x 3.00 cm.

The density of magnesium is, d = 1.738 g/cm³

We need to find the mass of the magnesium block. We know that the density of an object is given by its mass per unit its volume. So,

$d=\dfrac{m}{V}\\\\\text{Where m=mass}\\\\m=d\times V\\\\m=1.738\ g/cm^3\times (2\times 3\times 3)\ cm^3\\\\m=31.284\ \text{grams}$

So, the mass of the block is 31.284 grams.

5 0

2 years ago

A general chemistry student found a chunk of metal in the basement of a friend's house. To figure out what it was, she tried the

mr_godi [17]

Answer:

do you have options for this

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2 years ago

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Honeybee venom is a solution that contains formic acid, which gives the venom an approximate ph of 5.0. which substance is more

Genrish500 [490]

Those substances which has pH less than 5 are more acidic than Honeybee Venom. Some of them are listed below along with their pH scale,

1) <span>Acid rain and Tomato Juice has a pH of 4.

2) Soda and Orange Juice has a pH of 3.

3) Vinegar and Lemon Juice has pH of 2.

4) Gastric acid has a pH of 1.

5) Battery Acids have pH of zero.</span>

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2 years ago