How many Mn atoms are found in the following compound?
3Cr(MnO4)6

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

Helium decays to form lithium. which equation correctly describes this decay?

How is the way a mixture is combined different from how a compound is combined?