What is the heat, q q , in joules transferred by a chemical reaction to the reservoir of a calorimeter containing 105 g 105 g of dilute aqueous solution ( c = 4.184 J/g⋅ºC c = 4.184 J/g·ºC ) if the reaction causes the temperature of the reservoir to rise from 21.0 ºC 21.0 ºC to 25.0 ºC 25.0 ºC ?

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

Which statement names the physical property of wood a. wood is softer than coal b. wood does not rust c. wood can rot d. wood can burn

Which statement best describes the he properties of iconic compounds ?