ITUS PIOLO 54. An unknown isotope has a half-life of 20 seconds. How much of your original sample will remain after 1 minute if
you started with 1500 grams of the isotope? I
Help please

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp

1. true or false: minerals are inorganic. true false 2. inorganic means that something has never been found alive 3. halite is another name for and is a mineral with a cubic crystal pattern. table salt rock salt