The relative formula mass of calcium carbonate is 100. What is the mass of carbon present in 100 g of calcium carbonate?

Why should you avoid wearing baggy clothes in the lab?

Katy works at a pet store, and is in charge of tracking the cat food supply for the morning, afternoon, and evening shifts.

How do humans worm up

What is common about the elements of a period? Select all that apply. They have the same number of electron energy levels. They have similar chemical characteristics. They have similar physical characteristics.

Steve works at a gas station in an urban area. He is constantly exposed to particulate material emitted from vehicles. For this reason, Steve is likely to suffer from which of these? A. asthma B. obesity C. diabetes D. hearing defect

Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to 1/4.00 of the original amount. How long ago was this plant alive?

Balance this equation---> Fe (s) + O2 (g) - - - >FeO (s) (s) = solid (g) = gas

During an endothermic phase change, what happens to the potential energy and the kinetic energy?

What is the difference between pure substance, element, and compund

Butane gas is used as the fuel in disposable lighters. It burn in oxygen to form carbon dioxide gas and water vapor. What mass of carbon dioxide is produced when 53.3 g of butane is burned in 103.9 g of oxygen