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Mamont248 [21]
4 years ago
12

In a science experiment, Which is the variable that the scientists are measuring or testing?

Chemistry
1 answer:
Musya8 [376]4 years ago
8 0

Answer:

The independent  variable

Explanation:

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An element's atomic number is 63. How many protons would an atom of this element have?
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Atomic number of an element correlates to the number of protons an atom of that element will have. An atom of this element would have 63 protons.
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3 years ago
What is matter?
Oduvanchick [21]

Answer:

C. anything that has mass and takes up space

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3 years ago
A gas with a volume of 4.0L at a pressure of 205kPa is allowed to expand to a volume of 12.0L. What is the pressure in the conta
mr Goodwill [35]

Answer:

68.3 kilo Pascal is the pressure in the container.

Explanation:

To calculate the new pressure , we use the equation given by Boyle's law. This law states that pressure is inversely proportional to the volume of the gas at constant temperature.

The equation given by this law is:

P_1V_1=P_2V_2

where,

P_1\text{ and }V_1 are initial pressure and volume.

P_2\text{ and }V_2 are final pressure and volume.

We are given:

P_1=205kPa\\V_1=4.0 L\\P_2=?\\V_2=12.0 L

Putting values in above equation, we get:

P_2=\frac{P_1V_1}{V_2}

=\frac{205 kPa\times 4.0 L}{12.0 L}=68.3 kPa

68.3 kilo Pascal is the pressure in the container.

5 0
3 years ago
Both the brain and the spinal cord are protected by _____.
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It is a watery fluid called <span>cerebrospinal fluid. Answer C :)
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The chemical equation for the formation of ammonia is unbalanced.
galben [10]

Answer:

The answer to your question is 2 molecules

Explanation:

Unbalanced chemical reaction

                   H₂(g)   +   N₂(g)   ⇒   NH₃ (g)

         Reactants         Elements          Products

                2                      H                       3

                2                      N                       1

Balanced chemical reaction

                   3H₂(g)   +   N₂(g)   ⇒   2NH₃ (g)

         Reactants         Elements          Products

                6                      H                       6

                2                      N                       2

From the balanced chemical reaction we conclude that when 3 molecules of hydrogen react with one molecule of nitrogen, 2 molecules of ammonia will be formed.

4 0
4 years ago
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