Since, density is directly proportional to mass. So, an ext is the massive of an element much more will it is in its density.

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Mass that magnesium is 24.305 g/mol.

Mass that barium is 137.327 g/mol.

Mass the beryllium is 9.012 g/mol

Mass of radium is 226 g/mol.

Hence, radium has an ext mass as such it will have actually the greatest thickness at STP.

has actually the greatest thickness at STP.

Further Explanation:

Ideal gas law is the equation that state for any hypothetical gas. The expression for the ideal gas equation is together follows:

…… (1)

Here,

P is the pressure.

V is the volume.

T is the absolute temperature.

n is the number of moles.

R is the global gas constant.

The formula to calculate the number of moles is together follows:

...... (2)

Here,

n is the number of moles.

m is the mass.

M is the molar mass.

Substitute the value of n indigenous equation (2) in equation (1).

…… (3)

Rearrange equation (3) as follows:

…… (4)

The formula to calculate thickness is together follows:

...... (5)

Here,

is the density.

m is the mass.

V is the volume.

Substitute equation (5) in equation (4).

…… (6)

Rearrange equation (6) to calculate the density.

...... (7)

At STP, T and P stay constant, R is already a constant. So follow to equation (7), density of substance is straight proportional come the molar fixed of the substance.

The molar mass of scandium is 44.96 g/mol.

The molar fixed of selenium is 78.97 g/mol.

The molar fixed of silicon is 28.09 g/mol.

The molar massive of salt is 22.99 g/mol.

The molar massive of selenium is the highest amongst the given facets so its density will be the greatest.

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1. Which statement is true because that Boyle’s law:

2. Calculation of volume the gas: