How much elements are in the periodic table?

If you were to react 4.3 miles of magnesium phosphide how many moles of potassium would you need?

What do elements of the same group have in common

When energy is added whitch bond is created. atp, adp, or amp?

A sample of oxygen at room temperature occupies a volume of 500. l at 1.75 atm. what would be the volume of this gas at 2.50 atm at the same temperature?

Which one of the following classes of organic compound does not contain the carbonyl (C=O) group? A) aldehydesB) carboxylic acidsC) ketonesD) alcoholsE) esters

A 10.0 gram sample of h2o at 23.0c absorbs 209 joules of heat. what is the final temperature

What does the sum of the protons and neutrons in an atom equal

Which gas sample at STP has the same total number of molecules as 2.0 liters of CO2 (g) at STP

Benzene contains only carbon and hydrogen and has a molar mass of 78.1 g/mol. Analysis shows the compound to be 7.44% hydrogen by mass. Find the empirical and molecular Formula of benzene.

What is the Lewis structures for Ca (OH) 2