Historically, the left hemisphere was seen as the dominant hemisphere of the brain.
Hope I helped! :)
Answer:
ok
Explanation:
Element %composition Mol. mass No. of C atoms Simplest Rounding
ratio off
C 82.76 12 6.89 1× 2 2
H 17.24 1 17.24 2.5× 2 5
Number of carbon atoms present =
12
82.76
=6.89
Number of hydrogen atoms present =
1
17.24
=17.24
simplest ratio =
6.89
6.89
=1
simplest ratio =
6.89
17.24
=2.5
∴ Empirical fromula is C
2
H
5
Empirical formula mass= 2×12+5 = 29
∴ V.D. = 29
Mol. mass = 2 × V.D.
=58
n=
Empiricalformulamass
Molecularmass
=
29
58
=2
∴ Molecular formula = C
4
H
10
<em>pls mark me as braillant</em>
Calcium ions have a charge of “2+”because they are in group two (column number 2)
Skip over the transition metals
Fluoride ions would have a charge of
“1-” because they are all the way near the end of the table in the second last group (group 7)
Hope that helps :)
Mass is never lost or gained in chemical reactions. So we can say that mass is always conserved. In other words, the total mass of products at the end of the reaction is equal to the total mass of the reactants at the beginning.
This fact allows you to work out the mass of one substance in a reaction if the masses of the other substances are known.
Considering the definition of percent by volume concentration, the correct answer is option D: the percent by volume concentration of the solution is 1.50%
Percent by volume concentration is a measure of concentration that indicates the volume of solute per 100 volume units of the solution. This value is calculated by dividing the volume of the solute by the total volume of the solution, and multiplying by 100 to express it as a percentage:
![percent by volume concentration=\frac{volume of solute}{total volume of the solution}x100](https://tex.z-dn.net/?f=percent%20by%20volume%20concentration%3D%5Cfrac%7Bvolume%20of%20solute%7D%7Btotal%20volume%20of%20the%20solution%7Dx100)
In this case, you know:
- volume of solute= 3 mL
- total volume of the solution= 200 mL
Replacing in the definition of percent by volume concentration:
![percent by volume concentration=\frac{3 mL}{200 mL}x100](https://tex.z-dn.net/?f=percent%20by%20volume%20concentration%3D%5Cfrac%7B3%20mL%7D%7B200%20mL%7Dx100)
Solving:
percent by volume concentration=0.015×100
percent by volume concentration=1.50
Finally, the correct answer is option D: the percent by volume concentration of the solution is 1.50%
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