Question

A When 88.583 and 74.18 are added, the answer should be based on < Enter the answer with the correct number of digits. 88.583 + 74.18 b. When 57.337 is divided by 46.157 the answer should be based on > Enter the answer with the correct number of digits. 57.337 : 46.157 =

a. When 89.55 and 86.910 are multiplied, the answer should have Enter the answer with the correct number of digits. 89.55 X 86.910 b. When 89.55 and 86.910 are added, the answer should have Enter the answer with the correct number of digits 89.55 + 86.910 = 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 4.34 mm2 atoms The mass of a single chromium atom is 8.64*10-23 grams. How many chromium atoms would there be in 319 milligrams of chromium? atoms

Answer 1

In these calculations, we deal with addition, division, multiplication, and conversion of units to calculate the sums, quotients, and number of atoms.

When 88.583 and 74.18 are added:

88.583 + 74.18 = 162.763

When 57.337 is divided by 46.157:

57.337 : 46.157 = 1.24

When 89.55 and 86.910 are multiplied:

89.55 x 86.910 = 7779.2605

When 89.55 and 86.910 are added:

89.55 + 86.910 = 176.460

The radius of a strontium atom is 215 pm. To span a distance of 4.34 mm, we need to convert millimeters to picometers and divide 4.34 mm by the radius of a strontium atom: (4.34 mm * 10000000 pm/mm) / 215 pm = 20186 atoms

The mass of a single chromium atom is
`8.64*10^-23` grams. To calculate the number of chromium atoms in 319 milligrams, we need to convert milligrams to grams and divide the mass by the mass of a single chromium atom: (
`319 mg * 10^-3 g/mg`) / (
`8.64*10^-23 g/atom`) =
`3.69*10^19`atoms