17) Carbon-14 has a half-life of 5730 years. If a scientist determines that the mass of carbon-14 in a fossil has decreased from 0.100 g to 0.025 g, how old
is the fossil?
age of fossil =

Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2al(s)+3cl2(g)→2alcl3(s) what is the maximum mass of aluminum chloride that can be formed when reacting 32.0 g of aluminum with 37.0 g of chlorine? express your answer to three significant figures and include the appropriate units.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

How do dying stars contribute to the formation of planets