What might cause the percent yield of sodium chloride to be less than 100%? How about when it is more than 100%?

which of these is a chemical change? A. melting ice B. making powdered juice C. cutting paper D. sodium hydroxide

An atom of argon rarely bonds to an atom of another element because an argon atom has (1) 8 valence electrons (2) 2 electrons in the first shell (3) 3 electron shells (4) 22 neutrons

How many moles of iodine are in 0.333 mol of CaO (I03) 2?

Match with the correct definition. A. Each electron state can hold no more than two electrons, which must have opposite spins. B. Electron sharing between two adjacent atoms such that each atom assumes a stable electron configuration. C.

Which lists the main components of Darwin's theory of evolution? Random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change.

Which of the following is an example of heat transfer by conduction? A. The upstairs of a house being warmer than the downstairs B. Burning your finger on a hot match C. The sun warming your skin D. Being warmed by a fire on a cold night

How much did John save in his 401 (k) in the 2014 tax year?

Explain why the chemical released from the injured fish may not cause in a wa why the chemical released from the injured fish may not cause in alarm response in other fish species

hat historical figure was responsible for developing the system for categorizing living things that is still used today? A) Sir Isaac Newton B) Carolus Linnaeus C) Benjamin Franklin D) Galileo

Suppose you have made the following hypothesis: Sharks are most common near coral reefs, because there are more fish there to eat. Suppose you observed 10 sharks on a coral reef in the Caribbean, and 15 sharks in the open ocean 50 miles away.