Why is oxygen written with a subscript 2 in CO2?
.
A. Its mass is twice as great as the reactants'.

B. Each molecule of carbon dioxide has two oxygen atoms.

C. Its mass increases by two times as a result of the reaction.

D. Carbon always bonds to two oxygen atoms.

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?

Butadiene undergoes a reaction at a certain temperature in the gas phase as follows: 2c4h6(g) --> c8h12(g) the following data were collected for this reaction: time (min) [c4h6] (m) 0 0.36 15 0.30 30 0.25 48 0.19 75 0. determine the order of the reaction and the rate constant. 1st order and k = 4.3x10 -4 s-1 1st order and k = 2.3x10-4 s-1 2nd order and k = 4.3x10-4 s-1 2nd order and k = 2.3x10-4 s-1 zero and k = 4.3x10-4 s-1

Which metal exist in liquid state and can be cut with knife ?