2 years ago

Arrange the following elements based on their size (atomic radii) from largest to smallest: Ca, Ge, Br, K, Kr

Chemistry

1 answer:

Lady bird [3.3K]2 years ago

7 0

Answer: K, Ca, Ge, Br, Kr

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What is the percent composition of the u.s quarter, which has the mass of 5.670g

Vitek1552 [10]

The percent composition of each element can be calculated as follows:
% composition = (mass of element / total mass) * 100

The total mass of the quarter is given to be 5.670 grams
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Substitute in the above equation to get the mass percentage of each element as follows:
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2 years ago

How many moles of silicon are in 5.9 X 10 to the 24 power atoms of silicon

Dimas [21]

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Explanation:

1 mole = Avogardo's Number <<6.022 E 23 <<particles, atoms, etc.>>
This problem can be solved using dimensional analysis by multiplying atoms (5.9E24 atoms) by (1) mole and then dividing the number by Avogardo's number (6.022 E 23 atoms).
Note: E = * 10