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3 years ago

What is the name of a binary compound made up of selenium and potassium ?

Chemistry

1 answer:

natima [27]3 years ago

3 0

Answer:

A.dipotassium monoselendie.

Explanation:

The binary compound formed a dipotassium monoselenide;

K₂Se

This is an ionic compound;

The combining power of potassium is +1

Combining power of Selenium is -2

K Se

Combining power 1 2

Exchange of valency 2 1

Molecular formula: K₂Se

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Magnesium and oxygen are likely to form a covalent bond between them. True or false??

zalisa [80]

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4 years ago

What is the molar mass of (NH), CO?<br> 138g<br> 788<br> 968<br> 1448

aleksandr82 [10.1K]

Answer:

The molar mass of $(NH_{4})_{2}CO_{3}$ is 96.8 g/mol

Explanation:

The given molecular formula - $(NH_{4})_{2}CO_{3}$

Individual molar masses of each element in the compound is as follows.

Molar mass of nitrogen - 14.01 g/mol

Molar mass of of hydrogen = 1.008g/mol

Molar mass of carbon = 12.01 g/mol

Molar mass of oxygen =16.00 g/mol

Molar mass of $(NH_{4})_{2}CO_{3}$ is

$2\times[1(14.01)+4(1.008)]+1(12.01)+3(16.00)= 96.8g/mol$

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3 years ago

What mineral is the hardest known substance in nature?

shusha [124]

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Hope this helps.

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3 years ago

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If you start a chemical reaction with 5 atoms of hydrogen, how many hydrogen atoms will you have when it is finished? Group of a

mote1985 [20]

Answer:

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Explanation:

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We finish with what we start with in a chemical reaction. Although new species might form, the number of atoms on both sides of the expression will still be maintained.

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