The density of a pure substance is its mass per unit volume. The density of ethylene glycol has been measured to be . Calculate the mass of of ethylene glycol. Be sure your answer has a unit symbol and the correct number of significant digits. Solution:

The clouds are grey and ground is wet. a quantitative b qualitative

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?