Which of the following statements about the mole is FALSE? a. The size of a mole of atoms has a reasonable mass.
b. A mole of a monatomic element corresponds to one Avogadro's number of atoms.
c. One mole of a monatomic element has a mass equal to its atomic mass expressed in grams.
d. One mole of water contains 1/2 mole of oxygen atoms.
e. None of the above
Answers
It is false that d. One mole of water contains 1/2 mole of oxygen atoms.
Let's consider which of the following statements about the mole is false.
a. The size of a mole of atoms has a reasonable mass. TRUE. For instance, 1 mole of Na has a mass of 23 grams.
b. A mole of a monatomic element corresponds to one Avogadro's number of atoms. TRUE. A mole of atoms contains 6.02 × 10²³ atoms (Avogadro's number).
c. One mole of a monatomic element has a mass equal to its atomic mass expressed in grams. TRUE. For instance, the molar mass of Na is 23 g/mol and the atomic mass is 23 amu.
d. One mole of water contains 1/2 mole of oxygen atoms. FALSE. The molar ratio of H₂O to O is 1:1. Thus, 1 mole of H₂O contains 1 mole of O.
It is false that d. One mole of water contains 1/2 mole of oxygen atoms.
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Answer:
The answer is D.
Explanation:
Hope this helps.
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I hope that's help !
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Explanation:
It is known that one mole of chromium or molar mass of chromium is 51.99 g/mol.
It is given that number of moles is 11.9 moles.
Therefore, calculate the mass of chromium in grams as follows.
No. of moles =
mass in grams = No. of moles × Molar mass
= 11.9 moles × 51.99 g/mol
= 618.68 g
Thus, we can conclude that there are 618.68 g in 11.9 moles of chromium.
1mole ----- 52g Cr
11,9moles --- x
x = 11,9*52/1 = 618,8[g]
Yellow
Green
Blue
Answers
Answer:
Red
Explanation:
Red is diffracted the most due to its long wavelength. Compared to violet which is the shortest and is diffracted the least.
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