Now Let's Try Some Homework Questions:
5.	Which formula represents a binary compound?        (1)Ne      (2)Br2      (3)C3H8      (4)H2SO4
6.	Given the equation: 2Na + 2H2O 2NaOH + H2 which substance in this equation is a binary compound?        (1)Na      (2)H2      (3)H2 O      (4)NaOH
7.	When sugar is dissolved in water, the resulting solution is classified as a        (1)homogeneous mixture        (2)heterogeneous mixture        (3)homogeneous compound        (4)heterogeneous compound
8.	Compared to the average kinetic energy of 1 mole of water at 0C, the average kinetic energy of 1 mole of water at 298 K is        (1)the same, and the number of molecules is the same        (2)the same, but the number of molecules is greater        (3)greater, and the number of molecules is greater        (4)greater, but the number of molecules is the same
9.	How many kilocalories are equivalent to 10 calories?        (1)0.001 kcal        (2)0.01 kcal        (3)1000 kcal        (4)10,000 kcal
10.	What is the total number of calories of heat energy absorbed by 15 grams of water when it is heated from 30C to 40C?        (1)10      (2)15      (3)25      (4)150
11.	Solid X is placed in contact with solid Y. Heat will flow spontaneously from X to Y when        (1)X is 20C and Y is 20C        (2)X is 10C and Y is 5C        (3)X is -25C and Y is -10C        (4)X is 25C and Y is 30C
12.	The boiling point of water at standard pressure is        (1)0.000 K      (2)100 K      (3)273 K      (4)373 K
13.	The minimum number of fixed points required to establish the Celsius temperature scale for a thermometer is        (1)1      (2)2      (3)3      (4)4
14.	The temperature of a sample of a substance changes from 10C to 20C. How many Kelvin degrees does the temperature change?        (1)10      (2)20      (3)283      (4)293