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Aleonysh [2.5K]
3 years ago
14

PLEASE PLEASE PLEASE PLEASE HELP CHOOSE TWO DONT GUEES PLEASE ITS MY ONLY HOPE.

Chemistry
2 answers:
hichkok12 [17]3 years ago
7 0
I think it's A and B! I haven't done the rock cycle in forever but c has nothing to do with rocks and i don't think it's d! Hopefully this helps!
balu736 [363]3 years ago
6 0
A I don’t know how to explain it but I just know that it’s A
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Can you Convert 75°F to °C
Leya [2.2K]

Answer: 23.8889

Explanation:

(75°F − 32) × 5/9 = 23.889°C

5 0
3 years ago
If 40.0 grams of zinc react with excess hydrochloric acid, how many grams of zinc chloride will be produced?
ludmilkaskok [199]

Answer:

Attached is the solution to the question

Explanation:

6 0
3 years ago
How fast must a 56.5-g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green li
nikklg [1K]

Answer:vv

v=2.17\times 10^{-26}\ m/s

Explanation:

The expression for the deBroglie wavelength is:

\lambda=\frac {h}{m\times v}

Where,  

\lambda is the deBroglie wavelength  

h is Plank's constant having value 6.626\times 10^{-34}\ Js

m is the mass of = 56.5\ g=0.0565\ kg

v is the speed.

Wavelength = 5400 Å = 5400\times 10^{-10}\ m

Applying in the equation as:-

5400\times 10^{-10}=\frac{6.626\times 10^{-34}}{0.0565\times v}

v=\frac{331300000}{10^{34}\times \:1.5255}\ m/s

v=2.17\times 10^{-26}\ m/s

7 0
3 years ago
When the equation below is completely balanced, what will be the coefficient for Fe2O3?
Mrac [35]
What’s the equation?
5 0
3 years ago
Which of these statements best explains why chemistry is reliable?
Dominik [7]

Answer:

It gives the same result when an experiment is repeated.

Explanation:

Below are the possible answers to the question:

<em>It is biased. </em>

<em>It cannot be verified. </em>

<em>It cannot add new evidence to existing evidence. </em>

<em>It gives the same result when an experiment is repeated.</em>

<em />

<em>The correct answer would be that </em><em>it gives the same result when an experiment is repeated.</em>

If a reaction is conducted in chemistry and certain results are obtained, once a detailed procedure of the experiment is known along with all the chemicals involved, such reaction/experiment can be repeated anywhere in the world and the same result would be obtained.

<u>The repeatability of experiments always makes the experiments to be reliable.</u> Hence, chemistry is reliable because it gives the same result without any variation when experiments are repeated under similar conditions.

7 0
3 years ago
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