Determine the mass in grams of 10.0 mol of oxygen. the molar mass of oxygen is 16.00 g/mol

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

When the earth was formed and cooled, why did nickel and iron end up in the center of the earth while basalt and granite ended up in the outer layers

Which term describes a fracture in the earth at which land stays in the same place? a. joint b. fault c. split d. hinge