2 years ago

The surface forces that change the surface of the earth are:

Chemistry

1 answer:

pshichka [43]2 years ago

5 0

Number one victory royal yaaa

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. how many lone pairs of electrons are present in the lewis structure of calcium sulfide?

miv72 [106K]

Answer:
Four

Explanation:
Calcium Sulfide is an ionic compound made up of Ca²⁺ and S²⁻.
Ca²⁺ is formed as,

Ca → Ca²⁺ + 2 e⁻

These two electrons are accepte by Sulfur as,

S + 2 e⁻ → S²⁻

So, before accepting 2 electrons S was having six valence electrons, after accepting two electrons from Ca it has 8 electrons which are present in four pairs as shown below,

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3 years ago

An insoluble solid is placed in water and the system allowed to reach equilibrium. The ratio of the rate at which ions join the

solmaris [256]

Answer:

One

Explanation:

Because it reaches an equibrum state so it's equals to one

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2 years ago

Atoms of Ca and F would be expected to react in a ratio of

Gemiola [76]

Answer:

A 1:1

Explanation:

i thinks it's right

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2 years ago

Complete them with correct formulas Then balance them

otez555 [7]

Answer:

1. 2Ca + N $_{2}$ → 2CaN

2. 4Li + O $_{2}$ → 2Li $_{2}$ O

3. 2KCl + BaF $_2$ → 2KF + BaCl $_2$

4. CH $_4$ + 2O $_2$ → CO $_2$ + 2H $_2$ O

Be sure to balance the number of atoms on both sides of each equation only by adding coefficients to the compounds!!!! Those without a coefficient are meant to have a coefficient of 1.

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2 years ago

Oxygen has 8 plus-charged protons. The number of minus-charged electrons is

DiKsa [7]

A single oxygen has atomic number 8 that means the nuclei of all oxygen atoms have eight protons. The number of minus-charged electron is two but the number of electrons is 10. To gain a minus two-charge ion, it must have two more negative electrons than positive charged protons. With this, the ion has 10 electrons, which give it a -2 net charge.

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3 years ago