Calculate how many moles are present in 545 cm3 CH4 at STP.

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution

What is bromine+calcium iodide--> calcium bromide +iodine balanced

What are fossils of organisms that existed over a wide area but only for a limited time period called?