Which unstable element is used to determine the age of volcanic rock?

argon

carbon-14

potassium

carbon-12

A reaction was performed in which 3.7 g of benzoic acid was reacted with excess methanol to make 2.1 g of methyl benzoate. Calculate the theoretical yield and percent yield for this reaction.

Which element is most likely to gain electrons in a chemical reaction? 1) Kr 2) Br 3) Ca 4) Ba

When an atom of n-14 is bombarded by an alpha particle, the single product is? a. 18/9 n b. 5/10 b c. 18/9 f d. 19/7 n?

What are some patterns that we can use in order to predict reactivity in elements based on the periodic table

Aside from carbon and hydrogen, which are always present in organic molecules, what are some other substances they may contain?

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum