Who arranged the elements according to atomic mass, and used the arrangement to predict the properties of missing elements. a john dalton
b henry mosely
c dmitri mendeleev
d antoine lavoisier

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium