The temperature of a 46.9 L sample of NO is changed, causing a change in pressure from 647.7 kPa to 1,090.7 kPa. If its new temperature is 215.1 K and its new volume is 70.2 L, what was its original temperature in kelvins?

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

How many neutrons does a atom of cobalt have?

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.