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Natalka [10]
3 years ago
5

Na2CO3 + 2HCl -> CO2 + H2O + 2NaCl 5.30g of NaCl was produced from 9.30g of Na2CO3. HCl was present in excess. What is the %

yield of NaCl?
Chemistry
1 answer:
Delvig [45]3 years ago
7 0

Answer:

ghello

Explanation:

lolllo

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Helium gas diffuses 4 times as fast as an unknown gas. What is relative molecular mass of the gas​
Inessa05 [86]

The relative molecular mass of the gas​ : 64 g/mol

<h3>Further explanation</h3>

Given

Helium rate = 4x an unknown gas

Required

The relative molecular mass of the gas​

Solution

Graham's Law

\tt \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }

r₁=4 x r₂

r₁ = Helium rate

r₂ = unknown gas rate

M₁= relative molecular mass of Helium = 4 g/mol

M₂ = relative molecular mass of the gas​

Input the value :

\tt \dfrac{4r_2}{r_2}=\sqrt{\dfrac{M_2}{4} }\\\\16=\dfrac{M_2}{4}\\\\M_2=64~g/mol

7 0
3 years ago
♡
Oksi-84 [34.3K]

Your question has been heard loud and clear.

Both scientific laws and scientific theories are not based on hypothesis.

Because , scientific laws are proven and so they are real not hypothetical.

Whereas scientifc theories can be hypothetical.

Thank you

4 0
3 years ago
A forest is cut down to make room for a housing development. Which population is most likely to survive? A. raccoons, which can
Basile [38]
A. Raccoons. They will be able to survive in a housing area just as well, or even better then they had in the forrest.

I hope that helped! :D
5 0
4 years ago
What is the similarity between pure substances and mixtures?
Firlakuza [10]
Mixtures are made up of 2 or more pure substances. pure substance is just its self and a mixture is multiple substances.
6 0
2 years ago
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According to the modern atomic model, electrons in an atom are always
babymother [125]
The electrons always orbit around the nucleus, forming what is called an electron cloud. :)
8 0
3 years ago
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