The element "X" is "O" (oxygen).
<h3>Calculation:</h3>
Given,
Chemical formula = Na₂CX₃
Formula mass = 106 amu
Molar mass of Na = 23 amu
Molar mass of C = 12 amu
To find,
Element X =?
We will equate the equation as follows,
2(23) + 12 + 3(y) = 106
46 + 12 + 3y =106
58 + 3y = 106
3y = 106 - 58
3y = 48
y = 48/3
y = 16
We know that Oxygen has molecular mass of 16. Therefore the element "X" is "O".
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Lithium: 0.98
beryllium: 1.57
boron:2.04
carbon:2.55
nitrogen:3.04
lithium is the answer. it means that the atoms in the left side of the periodic table have the lowest electronegativity value
and the right side atoms have the highest
hope this helps
B). 2 Hours
Explanation if the older brother can run 6 MPH and it’s takes him a hour and twenty minutes you automatically can say it’s at least 6 miles then you have to see how many he can run in 20 minutes which is roughly 2 miles so that would mean he run for 8 miles if the younger brother can run 4 MPH then you just have to add that by 2 too see how long it will take to run 8
Answer:
0.674M of NaOH
Explanation:
Molarity, M, is an unit of concentration defined as ratio between moles of solute and liters of solution.
In the problem, sodium hydroxide (NaOH) is the solute (Less quantity) that is dissolved in 3.77 liters of water, probably.
Thus, molarity of 2.54 mol NaOH in 3.77L is:
2.54mol NaOH / 3.77L = <em>0.674M of NaOH</em>