3. A measurement of the freezing temperature of a solution allowsyou to calculate the concentration of the solution. What else do you need to measure to determine the molar mass of the solid added to the solvent

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

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Which of the following units is not an official si unit? mole liter kilogram ampere