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pochemuha
3 years ago
5

4. Which of the following statements

Chemistry
2 answers:
Gnesinka [82]3 years ago
6 0

Answer:

The answer is B

Explanation:

hammer [34]3 years ago
3 0

Answer: Only the nervous and endocrine systems are involved in maintaining homeostasis.

Explanation: Hope this helped you

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During the phase change from solid ice to liquid water, which bonds/forces are being weakened?
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A bag of gumdrops contains 17 orange gumdrops, 10 yellow gumdrops, and 17 black gumdrops.
Leviafan [203]

What is the question?

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Will mark as Brainliest.
xeze [42]
Spontaneous reaction.


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3 years ago
A plant fertilizer contains 15% by mass nitrogen (N). In a container of soluble plant food, there are 12.2 oz of fertilizer. How
ale4655 [162]
51.86 grams would be in the container.

One ounce is an equivalent of 28.34 grams, so times that by 12.2
.
12.2 * 28.34 = 345.75.

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3 years ago
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4.Calculate the volume of 40g of Helium (He) at rtp.
Oksana_A [137]

Answer:

2.24dm³

Explanation:

Given parameters:

Mass of He = 40g

Unknown:

Volume of Helium  = ?

Solution:

To solve this problem, we convert the given mass to number of moles.

   Number of moles  = \frac{mass}{molar mass}  

   molar mass of He  = 4g/mol

  Number of moles  = \frac{4}{40}   = 0.1mole

So;

                  1 mole of gas at rtp occupies a volume of 22.4dm³

                0.1 mole of He will occupy a volume of 0.1 x 22.4 = 2.24dm³

4 0
3 years ago
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