Which element was first discovered in space before it was discovered on earth?

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

What must happen before a body cell can begin mitotic cell division

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2