The difference in number of protons between phosphorus and lithium.

A pure gold ring with a volume of 1.79 cm^3 is initially at 17.4 ∘C. When it is put on, it warms to 28.5 ∘C. How much heat did the ring absorb? (density of gold = 19.3 g/cm^3)

21% of oxygen in air with barometric pressure of 625. what's partial pressure

four gases were combined in a glass cylinder with these partial pressures:3.5 atm N2,2.8 atm, 0.25 atm At and 0.15 atm He. What is the mole fraction in the mixture? What is the mole fraction of Ar in the mixture?

Why does burning coal produce more heat energy than burning paper

Which element is likely to be the most reactive? 1bromine 2chlorine 3fluorine 4iodine

Convert 0.00290 decigrams per milliters to nanograms per kiloliters

Is the periodic table of the elements all of the atoms known to exist?

You hold a handful of rocks and a handful of feathers. The rocks feel heavier than the feathers, even though you hold the same amount of both.

Find the mass of 1.112 moles HF?

Consider the formation of glucose from carbon dioxide and water, that is the reaction of the photosynthesis process: