3 years ago

Please help with 4 and 5!

Chemistry

1 answer:

Rashid [163]3 years ago

5 0

B,c hop you git a good grad

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An element's atomic number is 87. how many protons would an atom of this element have

andreev551 [17]

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You find a compound composed only of element X and chlorine and you know that the compound is 13.10% X by mass. Each molecule of

8_murik_8 [283]

Answer:

Explanation:

So, the formula for the compound should be:

$XCl_{6}$

Now we assume that we have 1 mol of substance, so we can make calculations to know the molar mass of element X, as follows:

$M_{Cl}=35.45g/mol\\$

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As we used 1 mol, we know that the molar mass is 32.06g/mol

So the element has a molar mass of 32.06 g/mol and an oxidation state of +6, with this information, we can assure that the element X is sulfur, so the compound is $SCl_{6}$

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At what point does salt melt

fredd [130]

Salt melts at 116°c.

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Explain why calcium (Ca) has a greater atomic radius than magnesium (Mg).

g100num [7]

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Magnesium nucleus will attract the electrons more toward it and therefore, shrinking the size of the atom. Magnesium atom is smaller than Calcium atom because Calcium has more electron ( 20e− ) which will occupy more energy levels ( n=4 for Calcium versus n=3 for Magnesium)

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