Concept explainers
(a)
Interpretation:
Amount in moles, number of molecules and formula units present in
(a)
Explanation of Solution
Number of moles of alumina:
Formula of alumina is given as
Thus the number of moles of alumina in
Number of molecules in alumina:
One mole of any substance contains
Thus the number of molecules of alumina in
Number of formula units:
As this is given species is a compound, the number of formula units will be equal to the number of molecules. Therefore, the number of formula units in
(b)
Interpretation:
Amount in moles, number of molecules and formula units present in
(b)
Explanation of Solution
Number of moles of hydrogen fluoride:
Formula of hydrogen fluoride is given as
Thus the number of moles of hydrogen fluoride in
Number of molecules in hydrogen fluoride:
One mole of any substance contains
Thus the number of molecules of hydrogen fluoride in
Number of formula units:
As this is given species is a compound, the number of formula units will be equal to the number of molecules. Therefore, the number of formula units in
(c)
Interpretation:
Amount in moles, number of molecules and formula units present in
(c)
Explanation of Solution
Number of moles of hydrogen peroxide:
Formula of hydrogen peroxide is given as
Thus the number of moles of hydrogen peroxide in
Number of molecules in hydrogen peroxide:
One mole of any substance contains
Thus the number of molecules of hydrogen peroxide in
Number of formula units:
As this is given species is a compound, the number of formula units will be equal to the number of molecules. Therefore, the number of formula units in
(d)
Interpretation:
Amount in moles, number of molecules and formula units present in
(d)
Explanation of Solution
Number of moles of glucose:
Formula of glucose is given as
Thus the number of moles of glucose in
Number of molecules in glucose:
One mole of any substance contains
Thus the number of molecules of glucose in
Number of formula units:
As this is given species is a compound, the number of formula units will be equal to the number of molecules. Therefore, the number of formula units in
(e)
Interpretation:
Amount in moles, number of molecules and atoms present in
(e)
Explanation of Solution
Number of moles of nitrogen:
The mass of nitrogen atom is
Thus the number of moles of nitrogen atoms in
Two atoms of nitrogen combines to give a molecule of nitrogen. Therefore, the number of moles of nitrogen molecule is calculated as shown below;
Thus the number of moles of nitrogen molecules in
Number of atoms or molecules in nitrogen:
One mole of any substance contains
Thus the number of atoms of nitrogen in
Two atoms of nitrogen combines to give a molecule of nitrogen. Therefore, the number of nitrogen molecule is calculated as shown below;
Thus the number of nitrogen molecules in
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Chapter F Solutions
EBK CHEMICAL PRINCIPLES
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- Many cereals are made with high moisture content so that the cereal can be formed into various shapes before it is dried. A cereal product containing 58% H2O by mass is produced at the rate of 1000. kg/h. What mass of water must be evaporated per hour if the final product contains only 20.% water?arrow_forward4.104 When 2.750 g of the oxide Pb3O4 is heated to a high temperature, it decomposes to produce 0.0640 g of oxygen gas and 2.686 g of some new lead oxide compound. How can you use these data to determine the formula of the new compound?arrow_forwardAssume that the radius of Earth is 6400 km, the crust is 50. km thick, the density of the crust is 3.5 g/cm3, and 25.7% of the crust is silicon by mass. Calculate the total mass of silicon in the crust of Earth.arrow_forward
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