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zhannawk [14.2K]
4 years ago
12

Express the sum of 1111 km and 222 km using the correct number of significant digits

Chemistry
2 answers:
kenny6666 [7]4 years ago
6 0

1333 KM is the sum,

Elza [17]4 years ago
6 0

Best Answer:  The answer is 1333. For addition / subtraction, the number of sig figs does not necessarily have to equal the number containing the fewest number of sig figs.


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Balance<br> Fe(s) + Ca(NO3)2(aq)-&gt;
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Fe(s)+Ca(NO₃)₂(aq)⇒no reaction

<h3>Further explanation</h3>

In voltaic series  

Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au  

The more to the left, the metal is more reactive (easily release electrons) and the stronger reducing agent  

The more to the right, the metal is less reactive (harder to release electrons) and the stronger oxidizing agent  

So that the element located on the left can push the element on the right in the redox reaction  

Reaction

Fe(s)+Ca(NO₃)₂(aq)⇒no reaction

Fe cannot reduce Ca because Ca is more reactive, so the reaction does not occur

On the contrary, this reaction can occur

3Ca(s) + 2Fe(NO₃)₃(aq) = 3Ca(NO₃)₂(aq) + 2Fe(s)

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3 years ago
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18.01528 g/mol

Explanation:

Using the equation to figure this out

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brainly.com/question/10193078

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