A star has a mass of 204 1030 kg three-quarters of which is
A star has a mass of 2.04 1030 kg, three-quarters of which is hydrogen. The mass of a hydrogen atom is 1.67 10-27 kg. How many hydrogen atoms does the Sun contain? Use powers-of-ten notation.
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write the balanced molecular equation for the reaction that occurs when h2so4 reacts with naoh in aqueous solutionwrite
if 0250 l of aqueous solution with a density of 100 gml contains 137 micrograms of pesticide express the concentration
a container in the shape of a cube 96 cm on each edge contains air with equivalent molar mass 289 gmol at atmospheric
write the net ionic equation for the reaction that takes place when the following aqueous solutions are mixed if you
a star has a mass of 204 1030 kg three-quarters of which is hydrogen the mass of a hydrogen atom is 167 10-27 kg how
a sample of lead has a mass of 4500 kg and a density of 1130 104 kgm3 at 0degc assume the average linear expansion
a pendulum of length l 840 m with a bob of mass m 180 kg is pulled aside until the bob is a distance l 672 m above
a thin piece of metal foil is 1328 ft long and 555 inches wide the density of the metal is 8638 gcm3 and the specific
a horizontal rope is tied from a house to a pulley and down to a paint bucket filled with sand the paint bucket
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