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

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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The answer is D.

Explanation:

Hope this helps.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

the ratio of the conjugate base to the acid required to attain the desired ph.