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Answer:
1.39 × 10²³ molecules of CaCl₂
Explanation:
Given data:
Number of moles of CaCl₂ = 0.23 mol
Number of molecules = ?
Solution:
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 molecules
0.23 mol × 6.022 × 10²³ molecules / 1mol
1.39 × 10²³ molecules
Answer:
Explanation:
Since no information was provided about the can of soda, let's take an example of 1 can of 12 fl oz (368 g) Coca-Cola.
The nutrition facts state that it contains 33 g of sugar. In order to calculate the number of molecules, we firstly need to know the molecular formula of sugar. Sugar can be represented by .
Our first step is to find the molar mass of sugar:
Secondly, dividing mass of sugar, , by the molar mass will yield the number of moles of sugar:
Finally, multiplying moles by the Avogadro's constant will yield the number of molecules:
Answer:
3.01 × 10^24 atoms of vitamin D
Explanation:
The number of atoms, molecules or ions present in a substance is given by the Avogadro's number which is 6.02 × 10^23.
Hence;
1 molecule of vitamin D contains 6.02 ×10^23 atoms
5 molecules of vitamin D contains 5 × 6.02 ×10^23/1
= 3.01 × 10^24 atoms of vitamin D
Explanation:
The given data is as follows.
P = 1.13 atm, V = 43.8 L
T = = (22.4 + 273) K = 295.4 K
Now, using the ideal gas equation we will find the number of moles as follows.
PV = nRT
n =
n = 2.042 mol
Thus, we can conclude that 2.042 mol of must decompose.