Answer:
0.5 × 10²³ atoms of iodine
Explanation:
Given data:
Mass of calcium iodide = 12.75 g
Number of atoms of iodine = ?
Solution:
First of all we will calculate the number of moles of calcium iodide.
Number of moles = mass/ molar mass
Number of moles = 12.75 g/ 293.9 g/mol
Number of moles = 0.04 mol
In one mole of calcium iodide there are two moles of iodine.
Thus in 0.04 moles:
0.04 mol × 2 = 0.08 moles of iodine
Now we will use the Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
0.08 moles of iodine × 6.022 × 10²³ atoms / 1 mol
0.5 × 10²³ atoms of iodine.
Answer:
¹³C Atoms = 246
Solution:
The Natural Abundance of Carbon Isotopes is as follow;
¹²C Natural Abundance = 98.93 %
¹³C Natural Abundance = 1.07 %
¹⁴C Natural Abundance = 1 ppt
The Number of ¹³C atoms is calculated as,
¹³C Atoms = (2.3 × 10⁴ × 1.07 %) ÷ 100 %
¹³C Atoms = 246
Answer:
allows the atoms of different elements to bond together to form new substances
Answer:
if you check there penetrating power it is not equal so you have to consider that when talking about there electrophilic rxn in of furan.
Explanation:
they both travel at the speed of light 3.0 *10^8m/s, and their varying wavelengths
Answer:
See below.
Explanation:
A lot of heat is produced in this reaction so much that the sodium catches fire. If there is a lot of water and just a small piece of sodium it will not catch fire. Potassium reacts more vigorously than sodium and will always catch fire.