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11 Nov 2019
A. A sample of ammonia (NH3) has a mass of 56.6 g. How many molecules are in this sample? a. 3.32 molecules b. 17.03 x 104 molecules c. 6.78 x 1023 molecules d. 2.00 x 1024 molecules e. 1.78 x 10molecules B. For which compound does 0.256 mole weigh 12.8 g? a. C,H,O b. CO2 c. CH,CI d. C,Ho e. None of these C. One molecule weighs 2.03 x 10 Its molar mass is a. 48.0 g/mole b. 92.1 g/mole c. 114 g/mole d. 122 g/mole e. None of the above D. The limiting reactant in a reaction a. has the lowest coefficient in a balanced equation b. is the reactant for which you have the fewest number of moles c. has the lowest ratio of moles available coefficient in the balanced equation d. has the lowest ratio of coefficient in the balanced equation moles available e. none of these E. Which of the following substances contains the greatest mass percent of oxygen? a. 1 moles H,O b. 2 moles of CS c. 3 moles of NaNO d. 4 moles of NH OH e. 5 moles of NaH F. Balanced chemical equations imply which of the following? a. Numbers of molecules are conserved in chemical change. b. Numbers of atoms are conserved in chemical change. c·Volume is conserved in chemical change d. Exactly two of the above statements are true e. More than two of the above statements are true
A. A sample of ammonia (NH3) has a mass of 56.6 g. How many molecules are in this sample? a. 3.32 molecules b. 17.03 x 104 molecules c. 6.78 x 1023 molecules d. 2.00 x 1024 molecules e. 1.78 x 10molecules B. For which compound does 0.256 mole weigh 12.8 g? a. C,H,O b. CO2 c. CH,CI d. C,Ho e. None of these C. One molecule weighs 2.03 x 10 Its molar mass is a. 48.0 g/mole b. 92.1 g/mole c. 114 g/mole d. 122 g/mole e. None of the above D. The limiting reactant in a reaction a. has the lowest coefficient in a balanced equation b. is the reactant for which you have the fewest number of moles c. has the lowest ratio of moles available coefficient in the balanced equation d. has the lowest ratio of coefficient in the balanced equation moles available e. none of these E. Which of the following substances contains the greatest mass percent of oxygen? a. 1 moles H,O b. 2 moles of CS c. 3 moles of NaNO d. 4 moles of NH OH e. 5 moles of NaH F. Balanced chemical equations imply which of the following? a. Numbers of molecules are conserved in chemical change. b. Numbers of atoms are conserved in chemical change. c·Volume is conserved in chemical change d. Exactly two of the above statements are true e. More than two of the above statements are true
Tod ThielLv2
11 Nov 2019