Answer:
magnesium has a greater effective nuclear charge than sodium.
Explanation:
Hi,
14H
15B
16J
17A
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Answer:
4.83 km
Explanation:
Let's consider the following subtraction.
4.910 km - 0.08 km
For an addition or a subtraction, the rule for significant figures is as follows: <em>limit the reported answer to the rightmost column that all numbers have significant figures in common</em>, in this case, 2 figures after the decimal point.
4.910 km - 0.08 km = 4.83 km
Answer : 6.41 moles of silicon are in the sample.
Solution : Given,
Moles of magnesium = 9.62 moles
The given chemical formula for talc is, 
From the given chemical formula we conclude that
The stoichiometry of magnesium and silicon is 3 : 2
3 moles of magnesium is equivalent to 2 moles of silicon
9.62 moles of magnesium will be equivalent to
moles of silicon
Therefore, the number of silicon present in sample are 6.41 moles.
It is the 4th one that is correct and balanced