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Harlamova29_29 [7]
3 years ago
14

Choose all the answers that apply.

Chemistry
2 answers:
zmey [24]3 years ago
5 0
Calcium is a non metal

Genrish500 [490]3 years ago
3 0
1: Calcium is a nonmetal
2: fills its shell by giving up two electrons
3: becomes a positively charged ion
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Which of the following is a major difference between elliptical galaxies and spiral galaxies?
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Its A because I did it on connexus

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A cast fossil is formed when
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Last week you reacted magnesium with a hydrochloric acid aqueous solution and hydrogen gas was produced. Let's say that you coll
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Answer:

69.8 kilo Pasacl is the pressure of the hydrogen gas.

Explanation:

Mg+2HCl\rightarrow MgCl_2+H_2

Pressure at which hydrogen gas collected = p = 101.2 kilo Pascals

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The pressure of hydrogen gas = P

The pressure at which gas was collected was sum of vapor pressure of water and hydrogen gas.

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69.8 kilo Pasacl is the pressure of the hydrogen gas.

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3 years ago
Is the following relation a function?​
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Explanation:

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4 years ago
what is the pH of a solution that results when 0.010mol HNO3 is added to 500.ml of a solution that is 0.10M in aqueous ammonia a
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Answer : The  

pH of a solution is, 8.56

Explanation : Given,

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First we have to calculate the value of pK_b.

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Now we have to calculate the pOH of buffer.

Using Henderson Hesselbach equation :

pOH=pK_b+\log \frac{[Salt]}{[Base]}

Now put all the given values in this expression, we get:

pOH=4.7+\log (\frac{0.55}{0.10})

pOH=5.44

The pOH of buffer is 5.44

Now we have to calculate the pH of a solution.

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Thus, the pH of a solution is, 8.56

8 0
3 years ago
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