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Alik [6]
4 years ago
7

18 POINTS I'LL DO BRAINLIEST Which is the best reason for not using a moving car as a reference point?

Chemistry
1 answer:
Butoxors [25]4 years ago
8 0

Answer: D

Explanation:you would want to use a stagnant object for point of reference

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How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?
frozen [14]

Hey there!

The number of molecules is the same.

One mole of a type of molecule is <u><em>always</em></u> 6.022 x 10²³ molecules, so no matter what the type of molecule is there will be the same amount of molecules.

The mass, volume, or other properties can be different, but the number of molecules will be the same.

Hope this helps!

7 0
4 years ago
PLZ SOMEONE HELP THANKS:))))<br> materials and conclude which is best to use. Full explanation
grin007 [14]

Answer:

For quick facts use reference materials such as encyclopedias, almanacs, or dictionaries. For credible and reputable information, use online databases of academic journals, or peer-reviewed journal articles that are written by scholars and researchers for a specific discipline.

3 0
3 years ago
What reactants form a combustion reaction?
blsea [12.9K]

<u>Answer</u><u>:</u>

Hydrocarbon and oxygen

<u>Explanation</u><u>:</u>

"a substance reacts with oxygen gas, it must involve O² as one of the reactants."

Using this, we can confirm Hydrocarbon and oxygen is a valid one.

6 0
3 years ago
Are phase changes physical or chemical changes? why?
Studentka2010 [4]
Physical! Because they do not modify the nature of the substance ( if you look at the chemical level) and it is reversible

Vapor is H20
Water is H20
Ice is H20

A chemical changes is not reversible
Burning wood for example! And the reactants interact together to form a new product.
6 0
3 years ago
Read 2 more answers
The Kp for the reaction below is 1.49 × 108 at 100.0°C:
kicyunya [14]
The rate constants, K, can be expressed in many different terms. In this case, Kp is the equilibrium constant expressed in terms of gas partial pressure. The formula for this is:
Kp = [P(product C) × P(product D)] / [P(reactant A) × P(reactant B)]
As there is only one product, we will use only its pressure in the numerator. 
Kp = [P(COCl2)] / [P(CO) × P(Cl2)]
P(COCl2) = 1.49 × 10⁸ × 2.22 × 10⁻⁴ × 2.22 × 10⁻⁴
P(COCl2) = 7.34 atm
6 0
3 years ago
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