___ 24. Properties such as melting point, density, ___ 29. Which of these elements is most and electrical conductivity are examples of similar chemically to phosphorus? A) nuclear properties A) N B) physical properties B) Si C) chemical properties C) S D) C ___ 25. Which of these is an example of an alloy? ___ 30. Horizontal rows of elements in the A) nylon periodic table are called B) wood C) glass A) periods D) brass B) octaves C) triads D) families ___ 26. How many moles of sulfur are present in a 16-g sample of sulfur? ___ 31. Given the balanced equation for the reaction producing ammonia: A) 0.50 mol B) 2.0 mol C) 32 mol  N2 + 3H2 2NH3 D) 0.25 mol How many moles of N2 are needed to Produce 6 moles of NH3? ___ 27. When an ion of copper in the ore 2 chalcocite gains electrons, the Cu2+ ion is 3 6 A) fused 9 B) reduced C) ionized D) oxidized ___ 32. How many moles of hydrogen atoms are in 4 moles of H2O? ___ 28. A metal is usually obtained from its ore by a process called A) 12 B) 4 A) casting C) 8 B) oxidation D) 2 C) reduction D) melting
___ 24. Properties such as melting point, density, and electrical conductivity are examples of A) nuclear properties B) physical properties C) chemical properties ___ 25. Which of these is an example of an alloy? A) nylon B) wood C) glass D) brass ___ 26. How many moles of sulfur are present in a 16-g sample of sulfur? A) 0.50 mol B) 2.0 mol C) 32 mol D) 0.25 mol ___ 27. When an ion of copper in the ore chalcocite gains electrons, the Cu2+ ion is A) fused B) reduced C) ionized D) oxidized ___ 28. A metal is usually obtained from its ore by a process called A) casting B) oxidation C) reduction D) melting ___ 29. Which of these elements is most similar chemically to phosphorus? A) N B) Si C) S D) C ___ 30. Horizontal rows of elements in the periodic table are called A) periods B) octaves C) triads D) families ___ 31. Given the balanced equation for the reaction producing ammonia: N2 + 3H2  2NH3 How many moles of N2 are needed to Produce 6 moles of NH3? 2 3 6 9 ___ 32. How many moles of hydrogen atoms are in 4 moles of H2O? A) 12 B) 4 C) 8 D) 2
Water%20Section%20CD%20Test.docx