A penny has a total mass of 3.1 grams. Zinc makes up 2.9 g of the penny. What is the percentage of zinc in the penny?

A student wonders whether a piece of jewelry is made of pure silver. She determines that its mass is 3.25 g. Then she drops it into a 10 mL graduated cylinder partially filled with water and determines that its volume is 0.428 mL.

What pressure would be needed to fit 35.0 g of N2 gas into a 195 mL flask of 0degrees C

Identify the following as an example of a physical property or a chemical property. A bar of lead is more easily bent (malleable) than a bar of aluminum of the same size.

The solid sink to the bottom when placed in a container of water. what does this tell you about it's density

What are examples of potential energy?

Which element is the least metallic between cadmium, silver, zinc, or iron?

Describe the motion of molecules in an ice cube an in a radiator in winter

True or False. Heat is always transferred from warmer objects to cooler objects.

Which of the following statements is true? Question 5 options: Nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not.

In which group is an element that has an outer-level electron configuration consisting of one electron in the nd orbital and two electrons in the ns orbital?