56.4 g of Selenium combine completely with 17.4 of Magnesium. Find the percent composition of the substance

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

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

Why is nh3 classified as a polar molecule