A blank is a substance that is made by combining two substances
1 answer:
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Answer:
<u>2.26 </u>
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Explanation:
First you should know what are significant figures,
1 . All non - zero digits are significant.
2 . The zero between two non- zero are significant.Ex 302 has 3 significant figures.
3. The zero before the decimal and before any non-zero digit is non significant. Example : 0.003 has only 1 significant figure.
4. The zero after non zero are non - significant . But the zeros after the decimal point are significant.
300 has only 1 significant figure
300.0 has 4 significant figure
The least number of significant figures present in the number should be there in the final answer of the calculation.
Look at the number having minimum significant digits :
It is 3 (every number has 3- significant figures ) So the answer should also contain 3 - significant figures.
First solve the numerator part
Round off this number to 3 significant figures.
Answer is =<u> 2.26</u>
It has 3 - significant digit since all the digits are non-zero.
Answer:
0.2g of hydrogen is needed to produce 1.80g of water
Explanation:
No. of moles of water
From given values,
Weight of water
Molecular weight of water
No. of moles of water
From equation, it is clear that 2 moles of water can be formed by 2 moles of
Hence, 0.1 mole of water can be formed from 0.1 mole of
Now,
No. of moles of