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Lemur [1.5K]
3 years ago
5

The radius of a strontium atom is 215 pm. How many strontium atoms would have to be laid side by side to span a distance of 4.19

mm?
Chemistry
1 answer:
Solnce55 [7]3 years ago
8 0

Answer:

0.97 ×  10⁹ strontium atoms

Explanation:

if       1 pm is equal with 10⁻⁹ mm

then  215 pm are equal to X mm

X = (215 ×  10⁻⁹) / 1 = 215 ×  10⁻⁹ mm

Now the diameter of the strontium atom is twice the radius:

diameter = 215 ×  10⁻⁹ × 2 = 430 ×  10⁻⁹ mm

if           1 strontium atom have a diameter of 430 ×  10⁻⁹ mm

then      X strontium atom are needed to be laid said by side to span a distance of 419 mm

X = (419 × 1) / (430 ×  10⁻⁹) mm = 0.97 ×  10⁹ strontium atoms

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A block of metal has a width of 3.2 cm , a length of 17.1 cm , and height of 4.6 cm . Its mass is 1.4 kg . Calculate the density
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The Density of  the metal  is 5.6 g/cm³

<h3>What is the density of a substance?</h3>

The density of a substance is the ratio of the mass and the volume of the substance.

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