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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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What is the difference between a mixture and compound
bonufazy [111]
A compound is made up of a single type of molecule. A mixture, on the other hand, is made up of different substances that can be distinguished from one another.
As an example:
Water (pure water) is a compound since it's only made up of water molecules
Seawater is a mixture since it is made up of water molecules and soluble salts
3 0
3 years ago
Đốt cháy hoàn toàn 0,1 mol axit đơn chức cần V lít O2 ở đktc. Thu được 0,3 mol CO2 và 0,2 mol h20 vậy giá trị V là
maria [59]

Answer:

Complete combustion of 0.1mol of monocarboxylic acid requires V litres of O2 at dtc. and the reaction produces 0.3mol of CO2 and 0.2mol of H2O.

What is the value of V?

Explanation:

The balanced chemical equation of the reaction is

HCOOH+O_2     -> 2CO_2+2H_2O\\

1mol. of acid reacts with 1mol of O_2 and produce 2mol. of CO2 and 2mol. of H2O.

Given,

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0.1mol of acid requires 0.1mol of oxygen.

Since, 1mol of oxygen at STP occupies 22.4L of volume.

Hence, the volume occupied by 0.1mol of oxygen is -- 2.24L

Answer is:

The value of V is 2.24L.

3 0
3 years ago
Why does the heat capacity decreases as atomic mass increases?
Alisiya [41]
The general trend for a substance's heat capacity and atomic mass is that they are inversely proportional. This is because denser or larger atoms have particles that are closer to each other. The close proximity of these particles make it easier to transfer heat because of their increased vibration, making the heat capacity required smaller. 
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3 years ago
Which two from this group have an identical number of energy levels?
storchak [24]

Answer: C

Explanation: Took the test

5 0
3 years ago
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Mandarinka [93]
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