A chemist weighed out 2.5 g of magnesium. Calculate the number of moles of magnesium she weighed out. Be sure your answer has the correct number of significant digits.

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change. when the temperature in a room increases from 25°c to 33°c, changes from a solid to a liquid. in a lab, methane and nitrogen are cooled from -170°c to -200°c. the methane freezes and the nitrogen . when gold is heated to 2,856°c it changes from a liquid to a .

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

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?