How many atoms are in 3.3 moles of copper atoms?
a. 1.9 x 10 atoms
b. 2.0 x 10^23 atoms
c. 2.0 x 10^24 atoms
d. 2.0 x 10^-23 atoms

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

Choose all that apply. when creating a graph, you should: determine the x- and y- variables label the scale on the x- and y- axes plot the data points draw a line of best fit to represent the data trend

Which of these best describes an ionic bond?