20) Write the empirical formulas for the following compound:HH-0-A) C,H¿O2B) CH,0C) CH,O21) Write a sentence that describes how to determine the number of moles of a compound in a known mass of thecompound if we know its molecular formula.A) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the molar massof the compound by the mass of compound.B) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass ofcompound by the molar mass of the compound.C) Use the molecular formula to find the molar mass; to obtain the number of moles, multiply the mass ofcompound with the molar mass of the compound.22) Compare 1 mole of H, 1 mole of O, and 1 mole of F2. Which has the largest number of molecules? Which hasthe greatest mass?A) All three have the same number of molecules, since a mole is defined as a specific number of particles.B) O2 has the largest number of molecules.C) H2 has the largest number of molecules.23) Calculate the molar mass of the following compound: hydrogen fluoride, HFA) 1.01 g/molB) 19.00 g/molC) 20.01 g/mol

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Chemistry

20) Write the empirical formulas for the following compound: HH C-0-C HH A) C,HO2 B) CH;0 C) C2H,0

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter5: Stoichiometry

Section: Chapter Questions

Problem 180IP: Tetrodotoxin is a toxic chemical found in fugu pufferfish, a popular but rare delicacy in Japan....

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

20) Write the empirical formulas for the following compound:
HH
-0-
A) C,H¿O2
B) CH,0
C) CH,O
21) Write a sentence that describes how to determine the number of moles of a compound in a known mass of the
compound if we know its molecular formula.
A) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the molar mass
of the compound by the mass of compound.
B) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of
compound by the molar mass of the compound.
C) Use the molecular formula to find the molar mass; to obtain the number of moles, multiply the mass of
compound with the molar mass of the compound.
22) Compare 1 mole of H, 1 mole of O, and 1 mole of F2. Which has the largest number of molecules? Which has
the greatest mass?
A) All three have the same number of molecules, since a mole is defined as a specific number of particles.
B) O2 has the largest number of molecules.
C) H2 has the largest number of molecules.
23) Calculate the molar mass of the following compound: hydrogen fluoride, HF
A) 1.01 g/mol
B) 19.00 g/mol
C) 20.01 g/mol

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