Why are x-rays powerful enough to pass through some substances (like skin muscle) but not others (like bone)?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it

Find the number of moles of argon in 364g of argon.