How many moles are in 3.84 grams of calcium chloride?
1 answer:
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Answer:
Explanation:
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In this case, when performing mathematical operations with numbers in scientific notation, the first step is to write them in standard notation:
550 - 65.0
Thus, the result without any significant figures-based analysis is:
615.0
However, since 550 is significant to the ones and 65.0 to the tenths, we need to round the result to the bigger significance, in this case to the ones; therefore the appropriate result would be:
615
That in scientific notation would be:
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Answer:
7.53*10^23 atoms
Explanation:
Using stoichiometry convert moles of silver to moles of copper. Based on the equation, for every 2 moles of silver, 1 mole of copper is produced.
Then, convert moles to atoms with Avogadro's number.
Your answer should be 7.53*10^23 atoms.