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Makovka662 [10]
3 years ago
10

The empirical formula for carbohydrates is CH2O. The molecular weight for a particular carbohydrate is 90.09 grams. What is the

molecular formula for that carbohydrate? (atomic masses: C =12.0107; H = 1.00794; O = 15.9994)
Chemistry
1 answer:
baherus [9]3 years ago
6 0
We find the weight of the empirical formula:
12.0107 + 2 x 1.00794 + 15.9994
= 30.03

Now, we divide the molecular weight by the weight of the empirical formula to find the number of times the empirical formula repeats:
90.09 / 30.03
= 3

The formula is 3(CH₂O)
C₃H₆O₃
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What does a useful scientific explanation include ??
ArbitrLikvidat [17]

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Explanation:

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In compliance with conservation of energy, Einstein explained that in the photoelectric effect, the energy of a photon (hv) abso
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Answer:

 a) 1.866 × 10 ⁻¹⁹ J      b)   3.685 × 10⁻¹⁹ J

Explanation:

the constants involved are

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a) the Ek ( kinetic energy of the dislodged electron) = 0.5 mu²

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where Ek = 1.866 × 10 ⁻¹⁹ J

v ( threshold frequency ) = c / λ where c is the speed of light and λ is the wavelength of light = 358.1 nm = 3.581 × 10⁻⁷ m

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Φ = 5.551 × 10⁻¹⁹ J - 1.866 × 10 ⁻¹⁹ J = 3.685 × 10⁻¹⁹ J

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