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Dima020 [189]
3 years ago
5

PLEASE HLEP I WILL GIVE BRAINLIEST

Chemistry
2 answers:
Leno4ka [110]3 years ago
8 0
D will be the answer !!!!!!:))
denis23 [38]3 years ago
5 0
D is the correct answer
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How many moles are in 20 grams of Ar?​
pashok25 [27]

Answer:

moles Ar in 20g = 0.500 mole Ar

Explanation:

moles = grams given / formula weight = 20g / 39.948g·mol⁻¹ = 0.500 mole Ar

7 0
3 years ago
Số oxi hóa của các nguyên tố: Fe(OH)2; Fe(OH)3; FexOy; Zn(OH)2 là gì
BARSIC [14]

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2 years ago
65 g of hydrogen chloride (hcl) is dissolved in water to make 5.0 l of solution. what is the ph of the resulting hydrochloric ac
sashaice [31]
65 grams of HCl = 65/36.5 moles of HCl = 1.78 moles
1.78 moles of HCl dissolved to make a 5 litres of solution has a concentration of 1.78/5 = 0.36 mol/dm^3 (Note: 1 litre = 1 cubic decimetre)

In a strong acid, such as HCl, [H+] = [acid], so [H+] = 0.36

To calculate pH, we have to take the negative logarithm of the concentration of protons

So, -log(0.36) = 0.45

Hope I helped!! xx
7 0
3 years ago
The compound whose molecules have the highest average kinetic energy is?
KIM [24]

Answer:

C)

Explanation:

The warmer the molecules, the higher the average kinetic energy.

"As stated in the kinetic-molecular theory, the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles. This is registered as an increase in the temperature of the substance." -lumen learning

(I know for sure but what think... hope this helped)  

3 0
2 years ago
Help fast please it's timed ​
lys-0071 [83]

Answer: B its most likely

6 0
3 years ago
Read 2 more answers
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