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Chemistry

2 answers:

creativ13 [48]4 years ago

7 0

Answer:

Only Student B

Explanation:

Her answer shows an octet around the N.

It uses dots to represent the lone pair and lines to represent the three bonding pairs.

The answer of Student B shows the correct number of electrons, but it uses arrows to represent the covalent bonds.

Lewis structures use only dots or lines to represent covalent bonds.

fredd [130]4 years ago

6 0

Answer:

Is B, it is B because you don't need arrows on it.

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How do you determine the number of protons in an element

QveST [7]

Answer:

You determine the number of protons by its atomic number, just like electrons.

I am joyous to assist you anytime.

3 0

3 years ago

You are given a cube of lead that is 1.000 cm on each side. The density of lead is 11.35. How many atoms of lead are in the samp

aliya0001 [1]

11.35 g atoms of lead are in the sample.

What does density mean?

The density of an area refers to the quantity of things—which may include people, animals, plants, or objects—there are in it.
Divide the number of objects by the area's measurement to determine density.
A country's population density is calculated by dividing its total population by its area, expressed in square kilometers or miles.

We can calculate the volume of the cube by cubing the side of the cube.

Volume of cube = ( 1.000 cm)³

= 1.000 cm³

We can now determine the amount of lead in the cube by multiplying by the density. Because we know we have a 1.000 cubic centimeter and that lead has a density of 11.35 grams per cubic centimeter, we have 11.35 grams of lead.

= ( 1.000 cm³) ( 11.35 $\frac{g}{cm^{3} }$ )