What are the affects of coffee for an average 12 year old?

62 grams of Zn (C2H3O2) 4 are dissolved to make a 1.5 M solution. How many milliliters of water are needed?

You have 4.872 x 1034 atoms of Copper. How many moles is this?

No pure elements are liquids at room temperature.

Formula for 2 hydrogen and 1 oxygen

you measure the depth to the bottom with a lead line and find out the bottom is 6000 meters deep. How many seconds would it take for a seconds would it take for a sound signal to leave the ship, bounce off the bottom and return to ship?

Which is a pure substance A) mixture B) solution C) element

Samuel adds a teaspoon of salt to a glass of water. He notices that the song disappears. Samuel takes a sip to discover that the water taste salty. What kind of change has occurred?

How are the physical and chemical properties of atoms represented on the periodic table of elements

how do we know isotopes exist?

Is albinism a dominant or recessive trait