What is the technical name for a thunderstorm cloud?

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

Look at the map above. which of the following statement is true

Which statement best describes how chemical equations demonstrate conservation of mass?