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3 years ago

How much calcium can be recovered from 75.0g of calcium fluoride

Chemistry

1 answer:

7nadin3 [17]3 years ago

3 0

38.46g

Explanation:

Given parameters:

Mass of CaF₂ = 75.0g

Unknown:

Mass of calcium that can be recovered = ?

Solution:

This is a mass percentage problem and we need to solve it accordingly.

To solve this problem;

Find the molar mass of CaF₂

Find the ratio between the molar mass of Ca and that of CaF₂

Multiply by the given mass

Molar mass of CaF₂ = 40 + (2 x 19) = 78g/mol

Mass of calcium = $\frac{40}{78}$ x 75 = 38.46g

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Mass percentage brainly.com/question/8170905

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Answer:

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The isotope 106 46Pd (106 on top and 46 on bottom)

vazorg [7]

Answer:

4. 60 neutrons.

Explanation:

The given isotopes;

¹⁰⁶₄₆Pd

In this isotope, we can deduce that the mass number is the superscript and the atomic number is the subscript;

Mass number = 106

Atomic number = 46

Mass number is the number of protons and neutrons in an atom;

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So, Number of protons = 46

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3 years ago

Looking at the Periodic Table, how can you determine if an element is a metal, metalloid or nonmetal?

Digiron [165]

Answer:

It depends on where it's located on the periodic table.

Explanation:

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3 years ago

How many hydrogen atoms are in each molecule of trisilylamine?

lord [1]

Answer:

9

Explanation:

The amine functional group is obtained by subsititution of one or more hydrogen atoms in the ammonia compound.

Ammonia is NH₃.

Then,

by substituting one hydrogen you obtain R - NH₂.

by substituting two hydrogens you obtain R' - NH - R''

by subsituting the three hydrogens you obtain:

R'''

R' - N - R''

In this case, the three subsitutuents are silyl groups. The silyl group is derived form silane and is SiH₃. So, the tcompound trisilylamine is:

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Thus, you can count 3 hydrogen atoms for every silylgroup for a total of 9 hydrogen atoms in each molecule of trisilylamine.

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3 years ago