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A sample of a compound is found to contain 1.011 g of chromium and 0.467 g of oxygen. What is the empirical formula for this compound?
Calculate the final temperature when 50 mL of water at 80 c are added to 25 mL of water at 25 C
Einstein reasoned that the absorbed photon must have the minimum energy required to dislodge an electron from the metal surface. This energy is called the work function () of that metal.
Suppose an adult is encased in a thermally insulating barrier so that all the heat evolved by metabolism of foodstuffs is retained by the body. What temperature does her body reach after 3.0 hours
56.0 mL of a 1.20 M solution is diluted to a volume of 248 mL. A 124-mL portion of that solution is diluted using 157 mL of water. What is the final concentration?
Calculate the amount of heat energy in joules required to heat 50.0g of each substance from 25.0 c to 37.0 c
What is the "mass per volume" percent sodium hypochlorite content of your household bleach product?
What mass of Al2O3 in grams can be made by reaacting 4.6 g AL with excess oxygen?
A solution transmittance is 35% at 260 nm. What will the solution absorbance be if you dilute 25.0 ml
A membrane distillation unit is used to remove water and lactose from milk. In the unit warm milk flows through the inside of a bundle of fibres and a cold fluid which consists of water and lactose flows on the outside of the fibres.
On what basis can we justify the assumption that the entropies of deprotonation of the ground and excited state 2-naphthol molecules are equal.
a mixture of ar and n2 gases has a density of 1.592 gl at stp. what is the mole fraction of each
Assuming the density of acetic acid solution is 1.0 g/mL, determine the volume of the acetic acid solution necessary to neutralize 25.0 mL of 0.10 M NaOH.
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