Answer:
3.74 x 10²² particles
Explanation:
Given parameters:
Mass of compound = 1.43g
Molar mass of compound = 23g
Unknown:
Number of particles of sodium = ?
Solution:
To find the number of particles of Na in the compound, we need to obtain the mass of sodium from the total mass given;
Mass of sodium = 
= 
= 1.43g
Now find the number of moles of this amount of Na in the sample;
Number of moles = 
= 
= 0.062mole
Now;
1 mole of substance = 6.02 x 10²³ particles
0.062 mole of substance = 0.062 x 6.02 x 10²³ particles
= 3.74 x 10²² particles
Answer: option A. acidic
Explanation: acidic solution is characterized by the presence of Hydrogen ion.
Formula= P4O6
You are going to want to flip the elements subscripts with one another.
P6O4
P will just stay as phosphorus, but since oxygen has 4 atoms, itbwill become tetroxide
The compound that has been capable to shift the equilibrium with common ion effect has been 
. Thus, option D is correct.
The complete equation for the decomposition of calcium carbonate has been:
The equilibrium has been the state in the reaction, when the number of products and has been equivalent to the number of reactants. The increase or decrease in the concentration of any of the reactant or product results in the shift in the equilibrium.
For the given reaction, the addition of Calcium or carbonate ions to the solution results in the increase in the product concentration with the common ion effect, and thereby shifts the equilibrium condition.
The ions liberated by the following compounds has been:
The compound, that has been capable of liberating the carbonate ions in the medium has been . Thus, it results in the shift of the equilibrium due to common ion effect. Hence, option D is correct.
For more information about common ion effect, refer to the link:
brainly.com/question/4090548
The percent abundance of the post-1982 pennies is 56%.
<h3>What is percent abundance?</h3>
Percent abundance is the percentage amount of all naturally occurring isotopes of an element.
<h3> Percent abundance of the post-1982 pennies</h3>
The percent abundance of the post-1982 pennies is calculated as follows;
percent abundance = number of post-1982 pennies / total number of pennies x 100%
percent abundance = (28) / (50) x 100%
percent abundance = 56%
Thus, the percent abundance of the post-1982 pennies is 56%.
Learn more about percent abundance here: brainly.com/question/6844925
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