An empty 250 milliliter beaker has a mass of 60 grams. When 100 milliliters of oil is added to the beaker, the total mass is 140 grams. the density of the oil is approimately

Index fossils are found throughout the world and come from organisms which existed during limited periods of geologic time. Which of the following best describes what index fossils can be used to determine? A. the age of a layer of rock B.

What are the four types of chemical reactions

A neutral atom of chlorine (CI) has an average mass of 35 amu and 17 electrons. How many neutrons does it have?

1. An acetic acid solution that is 60.0% HC2H302 (by mass) contains 60.0 g acetic acid and 100.0 g water 60.0 g acetic acid and 40.0 g water 60 moles of acetic acid 60.0 g acetic acid and 60.0 g water

Describe the chemical reaction that generates heat in the human body

For most compounds with a single keto group in the molecule, equilibrium favors the keto form over the enol form of the compound. this is due largely to what?

The partial negative charge in a molecule of water occurs because the electrons shared between the oxygen and hydrogen stoms spend more time around the oxygen atom nucleus than around the hydrogen atom nucleus?

An electron moved from a higher energy level to a lower energy level. What most likely happened during the transition?

As the average kinetic energy of the particles in a gas increases, which of the following occurs? The temperature of the gas increases. The temperature of the gas decreases. The number of particles increases. The number of particles decreases.

What is the type of strong chemical bond between carbon, hydrogen, and oxygen atoms in a single organic molecule?