Which of the following describes the melting point of a solid? A. The temperature at which intermolecular forces become stronger
than kinetic energy
B. The temperature at which molecular motion is unaffected by
intermolecular forces
C. The temperature at which the effects of heating exceed the
effects of pressure
D. The temperature at which the kinetic energy overcomes the
intermolecular forces

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

What is the molar mass of a gas that has density of 2.054 g/l