A sample of calcium oxide (CaO) has a mass of 2.80 g. The molar mass of CaO is 56.08 g/mol. How many moles of CaO does this sample contain?

When a certain rock formed, it contained 12 mg 40k. the rock now contains 3 mg 40k. the half-life of 40k is 1.3 billion years.

What is the weight in grams of 3.36 x 10^23 molecules of Copper Sulfate?

The photo above shows a landform surrounded by water on 3 sides. we can describe this landform as an

1. Which is composed of matter? (6P21) A. Electricity B. An atom C. Light D. heat

Which of the following does not participate in, nor is a component of, the electron transport chain? (Remember that molecules can have more than one name) Coenzyme A Non-heme, iron sulfur proteins Coenzyme Q Cytochrome c1 NADH.

The most important reason why solid sodium hydroxide is not used as a primary standard is

plate a and plate b are both continental plates. what is ghe most likely result if the two plates collide?

According to the second law of thermodynamics, the entropy of any system always increases. According to the second law of thermodynamics, the entropy of any system always increases. True False

If the density of Cu is 8.96g/cm cubed, what is the volume of 28kg of Cu?

A piece of iron can change in different ways. How is iron bending different from iron rusting?