Lakshmi has a sample of ammonium nitrate (nh4no3) that has a mass of 40.10 g. she knows that the molar mass of nh4no3 is 80.0432 g/mol. to the correct number of significant digits, how many moles of nh4no3 does the sample contain?

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

Express the following number in scientific notation. 0.026890 =

The minerals found in bones are deposited by living cells called