DDT is used as insecticides its molar mass is 354.5 g/mol .When DDT was analyzed by chemist he found that it contains 47.4 % carbon. How many carbon atoms are there in DDT?

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

How many atoms or molecules are there in a mole of a substance?

How many atomic mass units are equal to 1.672×10−24 g of protons?