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hram777 [196]
2 years ago
9

What two things must occur in order for a light ray to refract when it strikes

Chemistry
1 answer:
gregori [183]2 years ago
8 0
SURE I DONT LNOW bzbdhff
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Calculate the total quantity of heat required to convert 25.0 g of liquid ccl4(l from 35.0°c to gaseous ccl4 at 76.8°c (the norm
GREYUIT [131]

The solution would be like this for this specific problem:

<span>25.0 g CCl4 x (1 mole CCl4 / 153.8 g CCl4) = 0.163 moles CCl4 

 </span>(29.82 kJ / mole)(0.163 moles) = 4.86 kJ 

total heat = 1.11 kJ + 4.86 kJ = 5.97 kJ 

<span>I hope this helps and if you have any further questions, please don’t hesitate to ask again. </span>

6 0
3 years ago
Which substance is an Arrhenius acid?<br>a. H2<br>b.HCI<br>c. KCI<br>d, NH,3​
GenaCL600 [577]

Answer:

Hcl

Explanation:

Arrhenius acid - produce H+

Arrhenius base - produce oh -

we can see here in the option B give us H+ which is arrhenius acid

4 0
3 years ago
When does a change in energy occur?
MrRa [10]
3. in every chemical or physical change
6 0
3 years ago
List the 5 signs of a CHEMICAL REACTION
SVETLANKA909090 [29]
Color change, formation of a precipitation, formation of a gas, odor change, temperature change
6 0
3 years ago
How many grams nano3 add to 500g of h20 prepare solution .5 molal nano3?
Scilla [17]
Answer is: mass of sodium nitrate is 21,25 g.
m(H₂O) = 500 g · 1 kg/1000 g = 0,5 kg.
b(solution) = 0,500 m = 0,500 mol/kg.
m(NaNO₃) = ?
b(solution) = n(NaNO₃) ÷ m(H₂O).
n(NaNO₃) = 0,500 mol/kg · 0,5 kg.
n(NaNO₃) = 0,25 mol.
m(NaNO₃) = n(NaNO₃) · M(NaNO₃).
m(NaNO₃) = 0,25 mol · 85 g/mol.
m(NaNO₃) = 21,25 g.
8 0
3 years ago
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