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rusak2 [61]
3 years ago
8

An element has an atomic number of 83. The number of protons and electrons in a neutral atom of the element are ____.

Chemistry
1 answer:
Diano4ka-milaya [45]3 years ago
5 0
83. The protons and electrons will be the same as the atomic number, and the atomic mass minus the atomic number is the number of neutrons.<span />
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2. Which of the following solution contains more salt?<br> A. 3M<br> B. 1M<br> C. 0.5M<br> D. 0.25M
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Answer: 0.25M

Explanation: Because of the highest concentration of water and, if they are all the same volume, the greatest amount of water assuming it is a solid solute in a water solution.

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3 years ago
A mineral sample has a mass of 75 g. When the sample is dropped
Elena-2011 [213]

Answer:

3.75 g/mL

Explanation:

Density can be calculated using the following formula:

Density = mass (g) / volume (mL)

You have been given the mass of the mineral sample (75 g). To find the volume, you need to determine the amount of space that the sample takes up when it is placed in the water. This can be done by subtracting the initial water volume from the final water volume.

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Density = 75 g / 20 mL

Density = 3.75 g/mL

5 0
2 years ago
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Explain why the observation that the sun sets in the west could be called a scientific law.
tatiyna
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3 years ago
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What is the temperature at which the substance can be both in the solid and the liquid phase?
Anestetic [448]

Answer: Gas–liquid–solid triple point

The single combination of pressure and temperature at which liquid water, solid ice, and water vapor can coexist in a stable equilibrium occurs at approximately 273.1575 K (0.0075 °C; 32.0135 °F) and a partial vapor pressure of 611.657 pascals (6.11657 mbar; 0.00603659 atm).

Explanation:

It represents the equilibrium between the liquid and gas phases. The point on this curve where the vapor pressure is 1 atm is the normal boiling point of the substance. The vapor-pressure curve ends at the critical point (B), which is at the critical temperature and critical pressure of the substance.

3 0
4 years ago
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