The rate order for the first decomposition of NaO5 is 4.8*10^-4 S^-1. (a). What is the half life of the reaction. (b). If the initial pressure was 500 mmHg. what will be the pressure after (1). 10 seconds (2). 10 minutes.​

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

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

Who discovered a pattern to the elements in 1869?