Open Question
Ammonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil. (7.1, 7.2)c. How many moles of ammonium sulfate contain 7.4 x 10²⁵ atoms of N?
6. Chemical Reactions & Quantities
Mole Concept
Struggling with GOB Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Calculate the number of oxygen atoms found in 783.9 g NiCl2 • 6 H2O.
A
1.192 x 1025 O atoms
B
2.314 x 1025 O atoms
C
5.833 x 1026 O atoms
D
8.849 x 1026 O atoms
Verified step by step guidance1
Determine the molar mass of NiCl2 • 6 H2O by adding the atomic masses of all atoms in the compound: Ni, Cl, H, and O.
Calculate the number of moles of NiCl2 • 6 H2O in 783.9 g by dividing the mass by the molar mass of the compound.
Recognize that each formula unit of NiCl2 • 6 H2O contains 6 water molecules, and each water molecule contains 1 oxygen atom, resulting in 6 oxygen atoms per formula unit.
Multiply the number of moles of NiCl2 • 6 H2O by Avogadro's number (6.022 x 10^23) to find the number of formula units.
Multiply the number of formula units by 6 to find the total number of oxygen atoms in the sample.
Related Videos
Related Practice
