What is the ratio of ground-state nickel atoms (in which e is defined as zero) to nickel atoms that are in the first excited state of 201 cm21 at 298 k? (the spectrum of ni atoms is complicated by the existence of such an excited state. does your answer explain why? ) assume the two states have the same degeneracies.

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

May someone me with these science questions