65)A 66)C 68)A 70)D reaction takes place (C) sulfuric ackd can oxidine small amo
ID: 1040006 • Letter: 6
Question
65)A 66)C 68)A 70)D reaction takes place (C) sulfuric ackd can oxidine small amounts of wa D) water can oxidine sufuric acid. 64. In the thind step of a maltistep systhesis, a reaction misture must be held at 100 C. Which equipment is the most realistic and efficient to use in doing this in the lab? (A) boiling water bath (B) burner and dhermometer (C) electric hot plate D) heat lamp Which should be used to precisely deliver 25.00m. 65. A temperatare change causes the volume of a solution to increase. This change will cause (A) the molarity and the molality to increase. (B) (C) (D) 25 mlgraduated cylinde 25 ml. Erlenmeyer flask 25 ml. pipet (B) the molarity and the molality to decrease (C) the molarity to decrease but not change the molality D) the molarity to increase but not change the molality. Shown are concentration vs 1.5 66. Two students were assigned to determine the mass of a time plots for the t gaseous ate reaction 2NO + Which curves show the variation of NO and Op with time? 1.0 one kilogram standard mass by taking three readings each Jean's Data 1003 g 1004 g 1005g Terry's Data 993 g 1007 g 0.5 1000 If a comparison is made between the two sets of data (A) Jean's data are more accurate and more precise (B) Terry's data are more accurate and more precise (C) Jean's data are more accurate, but Terry's are more NO (D) Terry's data are more accurate, but Jean's are moreExplanation / Answer
Answer 65. C)
The change in temperature will cause the volume to increase, hence the molarity to decrease. But the molality will remain the same as the mass of the solution still remains the same.
Molarity= Number of moles/Volume in litres.
Molality= Number of moles/Mass of solution in kgs.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.