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3 years ago

In calcium fluoride, what is the closets noble gas that each ion becomes?

Chemistry

1 answer:

alekssr [168]3 years ago

4 0

Calcium fluoride: CaF₂
Ca(2+) >>> Ar (argon)
F(-) >>> Ne (neon)

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Which of these has a neutral ph? select one:<br> a. distilled water<br> b. salt water<br> c. milk?

lapo4ka [179]

Distilled water has the a neutral ph. Pure water always has a ph of 7.

5 0

3 years ago

How many grams of water are produced when 35.8 grams of Calcium hydroxide reacts with lots of Hydrochloric acid?

Veseljchak [2.6K]

Are produced 72 grams of water in this reaction.

<h3>Mole calculation</h3>

To find the value of moles of a product from the number of moles of a reactant, it is necessary to observe the stoichiometric ratio between them:

$Ca(OH)_2 + 2HCl = > 2H_2O + CaCl_2$

Analyzing the reaction, it is possible to see that the stoichiometric ratio is 1:2, so we can perform the following expression:

$MM_{Ca(OH)_2} = 74.1g/mol$

$MM = \frac{g}{mol}$

$74.1 = \frac{35.8}{mol}\\mol = 2$

So, if there are 2 mols of Ca(OH)2:

Ca(OH)2 | H2O

$\frac{1mol}{2mol} =\frac{2mol}{xmol}$

$x = 4mol$

Finally, just find the number of grams of water using your molar mass:

$MM_{H_2O} = 18g/mol$

$18= \frac{m}{4}\\m = 72g$

So, 72 grams are produced of water in this reaction.

Learn more about mole calculation in: brainly.com/question/2845237

5 0

2 years ago

In supersonic flights, molecules break apart and react chemically. Which of

Lina20 [59]

A or D I think...sorry if it’s wrong

3 0

3 years ago

Read 2 more answers

Determining wether the molecule is polar or non polar

Rainbow [258]

Answer:

1) polar

2)polar (not too sure about this one)

3)nonpolar

7 0

4 years ago

Observe: Set up the Gizmo to observe freezing. What do you notice about the temperature while the water is in the process of fre

kaheart [24]

Answer:

In cases where the water freezes, a release of energy occurs to the environment, therefore energy is lost, and it begins to "cool down".

The term cooling in chemical science today is not well seen since it is not considered that this exists, but would be replaced by the term "absence or loss of heat".

It is considered that a body cools when its temperature decreases, and if it continues to decrease as in the case of water, a point will reach the freezing point, which in this case that of water is 0 degrees Celsius, therefore when the cooling overcomes this thermal barrier the water solidifies "freezing"

Explanation:

In the case of pure water (H2O), the freezing point is 0 ° C. This means that, as long as it is at a temperature above 0ºC and below 100ºC (since that is its boiling point), the water will be in a liquid state.

8 0

3 years ago