a. Cyclopropane, C_3H_6, is an anesthetic given by inhalation. How many grams ar

Question

a. Cyclopropane, C_3H_6, is an anesthetic given by inhalation. How many grams are in 0.25 mole of cyclopropane? b. The sedative Demerol hydrochloride has the formula C_15H_22ClNO_2. How many grams are in 0.025 mole of Demerol hydrochloride? How many moles are contained in each of the following? 50.0 g of Ag 0.200 g of C 15.0 g of NH_3 75.0 g of SO_2 How many moles are contained in each of following? 25.0 g of Ca 5.00 g of S 40.0 g of H2_O 100.0 g of O_2 Calculate the number of moles in 25.0 g of each of the following: Ne O_2 Al(OH)_3 Ga_2S_3 Calculate the number of moles in 4.00 g of each of the following: He SnO_2 Cr(OH)_3 Ca_3N_2 How many moles of S are in each of the following quantities? 25 g of S 125 g of SO_2 2.0 moles of Al_2S_3

Explanation / Answer

7.18)

(a) molar mass of cyclopropane (C3H6) = 42 gm/mole

moles = mass / molar mass

thus, mass = molar mass x moles = (42 gm/mole) x 0.25 mole = 10.5 gm

(b) molar mass of Demerol hydrochloride (C15H12ClNO2)= 273.5 gm/mole

moles = mass / molar mass

thus, mass = molar mass x moles = (273.5 gm/mole) x 0.025 mole = 6.83 gm

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