What conclusion may be made based on this graph?
2 answers:
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Answer:
0.97 kg, 1.0kg
Explanation:
As you have mentioned in the question, to convert kilo-gram to grams, this conversion is used, 1 kilogram = 1,000 grams
Initially, when one has to convert from one unit to another, there is a lot of confusion. To avoid any such, multiply and divide the number with units to which it has to be converted.
Here,
970 g =
This makes no difference to the number.
970 g =
As, 1 kg= 1,000 g
970 g =
970 g = 0.97 kg
Rounding this off to the nearest tenth of a kilogram.
The tenths place is immediately to the right of the decimal point.
Here, 9 is at the tenth's place. Round the tenth's place up if the digit at hundredth's place is greater than or equal to 5. Since, 7 > 5, up the number at tenth's place.
So, answer is 1.0 kg
The order of frequency is d < a < c < b
eV
where z = atomic mass number
n = energy level
For hydrogen z = 1
Therefore, Energy for n = 1
eV
= -13.6 eV
for n = 2
eV
= -3.40 eV
for n = 3
eV
= -1.51 eV
for n = 4
eV
= -0.85 eV
for n = 5
eV
= -0.544 eV
n = 2 to n = 4 (absorption)
ΔE = E4 - E2 = -0.85 - (-3.40) = 2.55 eV
n = 2 to n = 1 (emission)
ΔE = E1 - E2 = -13.6 - (-3.40) = -10.2eV
The negative sign indicates that emission will take place.
n = 2 to n = 5 (absorption)
ΔE = E5 - E2 = -0.544 - (-3.40) = 2.856 eV
n = 4 to n = 3 (emission)
ΔE = E3 - E4 = -1.51 - (-0.85) = -0.66 eV
We know that
E = h * υ
Therefore, Energy is proportional to frequency.
So increasing the order of energy is
E4 < E1 < E3 < E2
order of frequency is
d < a < c < b
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