Anew penny has a mass of 2.49 g and a volume of 0.349 cm3. is the penny made of pure copper?

Answer explain why it is not possible to deduce a complete order of reactivity.

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car

Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass