Answer:
Length = 393pm, Density = 21.3 g/cm^3.
Explanation:
From the question above, we have the following parameters or data which is going to aid in solving the above Question.
=> The radius of a platinum atom = 139 pm.
Therefore, the length can be calculated by making use of the formula given below:
Length = 2 √( 2r) = 2 × √ (2 × 139 × 10^-12m ) = 393 × 10^-10 m = 393pm.
The density can be calculated by making use of the chemical formula given below:
Density = mass ÷ volume = (195.064/ 6.02 × 10^23) ÷ (3.93 × 10^-10/ 10^-2) = 21.3 g/cm^3.
Length = 393pm, Density = 21.3 g/cm^3.
Length = 2 √( 2r) = 2 × √ (2 × 139 × 10^-12m )
= 393 × 10^-10 m
= 393pm.
Now
The density should be
We know that
Density = mass ÷ volume
= (195.064/ 6.02 × 10^23) ÷ (3.93 × 10^-10/ 10^-2)
= 21.3 g/cm^3.
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