What is the frequency of a photon with an energy of 1.99 × 10(19)j?
(h = 6.63 × 101356_files/i0050001.jpg j·s)

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.