Chemistry College

The density of platinum is 21.45 g/cm3 at 20 ∘c. calculate the mass of 80.00 cm3 of platinum at this temperature.

Answers

Answer 1
The formula for density = mass/volume.
We know the density (21.45 g/cm³)
We know the volume (80.00 cm³) of the sample
We don't know the mass, so first - solve the equation for mass:

D=m/v  [multiply v to both sides to isolate m]
Dv=m

Now, insert the known value and units...make sure the units cancel properly:
21.45 g/cm³ x 80.00 cm³ = 1716 g

Answer 2

Final answer:

The mass of 80.00 cm3 of platinum at 20 ℃, given its density of 21.45 g/cm3, is calculated to be 1716 grams (1.716 kilograms) using the formula Mass = Density × Volume.

Explanation:

To calculate the mass of 80.00 cm³ of platinum at a temperature of 20 ℃, given that the density of platinum is 21.45 g/cm³, we use the formula for density:

Density = Mass / Volume.

Rearranging this formula to find mass gives us Mass = Density × Volume.

Substituting the known values:

Density = 21.45 g/cm³Volume = 80.00 cm³

Gives us:

Mass = 21.45 g/cm3 × 80.00 cm³ = 1716 g or 1.716 kg.

Thus, the mass of 80.00 cm³ of platinum at 20 ℃ is 1716 grams or 1.716 kilograms.

Related Questions

A neutral atom contains 5 neutrons and 4 protons. How many electrons does it contain?

Answers

the answer is it has 4 electrons. If an atom is neutral than the electrons and protons will be equal.
Final answer:

A neutral atom with 4 protons contains 4 electrons because, in a neutral atom, the number of protons and electrons are equal.

Explanation:

In chemistry, a neutral atom is one where the number of protons and electrons are equal. Protons carry a positive charge while electrons carry a negative charge. When these charges balance out, the atom is neutral. Hence, in the case of this atom with 4 protons, it must also have 4 electrons to keep it neutral. it means that it had no overall change So, the answer is that a neutral atom with 4 protons contains 4 electrons.

Learn more about Neutral Atom here:

https://brainly.com/question/34033125

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