[hema.s]

3. Bromine is a red liquid at 25° C. Its density is 3.12 g/cm3. What is the volume of 46.5 g of liquid bromine?
a) 12.9 cm3
b) 14.9 cm3
c) 15.9 cm3
d) 17.9 cm3

11. How many bonds around Oxygen atom in, ClO3-?
a) 1
b) 4
c) 2
d) 5


19. If the initial pressure of a 2.00 L gas sample is 2.50 atm, what will the pressure be if the volume is changed to 6.00 L at constant temperature?
a) 0.600 atm
b) 1.50 atm
c) 3.34 atm
d) 3.75 atm



^ الللي يعرف الحل يوضح :(