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ra1l [238]
3 years ago
10

Can you always tell by looking at a substance if it is pure or not? ​

Chemistry
1 answer:
Hunter-Best [27]3 years ago
5 0

Answer:

nope

Explanation:

bcoz every thing we look that isn't real. some substance are chemically changed and some are physically changed.if the physical change occurs then it is temporary change and if chemical change occurs it is permanent change.

Conclusion:I can think this much with my tiny mind.

THANK YOU

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3 0
2 years ago
38.25 grams of silicon is combined with 14.33 grams of nitrogen gas. How many grams of silicon nitride can be formed if nitrogen
zhuklara [117]
3Si + 2N2 --> Si3N4 (as given) 

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= 8.066g (4 significant figures) 

(hopefully it is right, but double check in case i did something wrong) :) 
6 0
3 years ago
2.50 grams F2= _____ grams of F2
Setler79 [48]

Answer:

i think maybe 94.99201599999999

Explanation:

3 0
2 years ago
Which properties determines the element that an atom Is?
balandron [24]

Answer:

The answer would be C. Number of protons in the atom.

Explanation:

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