How many chloride ions are there in 4 mol of CaCl2

48.176 ×10²³ chloride ions

Explanation:

Given data:

Number of chloride ions = ?

Number of moles of CaCl₂= 4 mol

Solution:

One mole of CaCl₂ contain 2 moles of chloride ions.

CaCl₂      →     Ca²⁺ + 2Cl⁻

4 moles of CaCl₂ contain,

4 ×2 = 8 moles of chloride ions

Number of chloride ions:

1 mole = 6.022×10²³ ions

8 mol × 6.022×10²³ ions/ 1 mol

48.176 ×10²³ ions

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.