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Tom [10]
3 years ago
8

Can some one help whith these

Chemistry
2 answers:
Dmitry [639]3 years ago
7 0

Answer:

hlo we can't see ur pdf so sry

plz mark me as a brainliest

MA_775_DIABLO [31]3 years ago
5 0

Answer:

what is this pdf I cannot see your question

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Question 8
nexus9112 [7]
72 degrees C (minus 273)
6 0
3 years ago
Express in scientific notation. Remember, M must be a number such that 1 -<br><br><br> 0.000000000000013= ____
Alex

Answer:

A) 1.3 * 10^-13

Explanation:

0.000000000000013 = 1.3 * 10^-13

5 0
2 years ago
7. Given the balanced equation:
Vika [28.1K]
Gas molecules have more freedom in motion—and gases can be thought of as more “disordered”—than molecules of a solid, which are rigidly held in place. When it comes to phases, the entropy increases as you go from a solid to liquid to gas (the gaseous state having the greatest entropy and the solid state having the least).

So, as a sample of solid iodine sublimes to form gaseous iodine, the entropy of the sample increases.
4 0
3 years ago
Which of the following is true regarding the law of conservation of mass
Luda [366]
These are the answer options of this question and the comments about their validity:

<span>A) It dictates that the number of molecules on each side of a chemical equation must be the same.

False: the number of molecules can change. Take this simple reaction for example:

2H2(g) +  O2 -> 2H2O

You start with 3 molecules, 2 molecules of H2 and 1 molecule of O2, and end with 2 molecules of water. Then the number of molecules of each side is different.



B) It dictates that the number of atoms of each element must be the same on both sides of a chemical equation.

TRUE: in a chemical reaction the atoms remain being the same at start and at the end of the process. Given that each atom has a characteristic mass, their conservation implies the law of conservation mass.


C) It states that the mass of the reactants must remain constant in order for a chemical reaction to proceed.

FALSE. The mass of the reactants changes during a chemical reaction, while they transform into the products.

D) It does not apply to chemical reactions.

FALSE: It is an important law used in the calculus related with chemical reactions.
</span>
3 0
3 years ago
What do you think the body does to try and maintain its balanced pH considering the wide range of acidic and basic substances in
sleet_krkn [62]
The lungs control your body's pH balance by releasing carbon dioxide. Carbon dioxide is a slightly acidic compound. ... Your brain constantly monitors this in order to maintain the proper pH balance in your body. The kidneys help the lungs maintain acid-base balance by excreting acids or bases into the blood.

Sorry if it’s wrong I’m not that sir and best luck with your studying
4 0
3 years ago
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