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Ira Lisetskai [31]
3 years ago
9

Pls help me. Show proof on why it’s that answer.

Chemistry
1 answer:
djverab [1.8K]3 years ago
7 0
Prevent additional sources of pollution because if the water gets polluted it can not be used and/or it won’t be pure/clean anymore.
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What is the mass, in grams, of 28.58 mL of acetone?
Vedmedyk [2.9K]
<span>If you look up the density of Acetone (Propanone in IUPAC names) you will find it is 0.7925g/cm3. This is the same as 0.7925g/ml. 

You can calculate mass using the equation:- mass = density x volume 
In your example mass = 0.7925 x 28.40 = 22.51g</span><span>
I think That's right. Hope this helps!!! Good luck!</span>
7 0
3 years ago
Read 2 more answers
Solve the following division problem: (3.4 x 10^7)/(6.8 x 10^3) =
eduard

Answer:

5000

Explanation:

8 0
2 years ago
Can someone please help me answer these questions and I’ll give you brainlest!!!!!
pickupchik [31]

Explanation:

first of all open the menu

5 0
2 years ago
Which of the following describes an endothermic reaction?
Alenkinab [10]
The endothermic reaction would be D. Batter becomes a pancake when heated. This is because the batter is absorbing the heat in order to turn into a pancake.

Answer is D. Batter becomes a pancake when heated.


Please vote brainliest thank you!
4 0
2 years ago
12. What is the frequency of a photon with an energy of 3.03 x 10-19 J?
bazaltina [42]

Answer:

u=4.57x10^5GHz

Explanation:

Hello.

In this case, given the formula:

E=h*u

Whereas E is the energy, h the Planck's constant and u the frequency of the photon. Thus, solving for it, we obtain:

u=\frac{E}{h}=\frac{3.03x10^{-19}J}{6.63x10^{-34}J*s}\\  \\u=4.57x10^{14}s^{-1}

Or also:

u=4.57x10^{14}Hz*\frac{1GHz}{1x10^9Hz}\\ \\u=4.57x10^5GHz

Best regards.

5 0
3 years ago
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