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Consider a piece of gold jewelry that weighs 9.95 and has a volume of 0.695 . The jewelry contains only gold and silver, which have densities of 19.3 and 10.5 , respectively. If the total volume of the jewelry is the sum of the volumes of the gold and silver that it contains, calculate the percentage of gold (by mass) in the jewelry.
A gas has a volume of 4.00 L at 0 degrees C. What final temperature, in degrees C, is needed to cause the volume of the gas to change to the following, if "n" and "P" are not changed? a) 100. L; b) 1200 mL; c) 250 L; d) 50.0 mL.
Draw a Lewis structure for ammonia NH3-.Show all unshared pairs and formal charges, if any. Assume that bonding follows the octet rule.
Calculating concentration of an ion, Given the concentration of hydroxide ions, use the ion product constant of water to calculate the concentration of the other ion at 298 K
What would be the product of triphenylbromomethane with water if it was reacted in acetone/methanol
The concentration of O2 in water required to support aerobic aquatic life is 4.0 mg L-1. What is the partial pressure in torr of O2 in the atmosphere that corresponds to this concentration. The Henry's law constant for O2 in water is 3.27 x 107 to..
how many millimeters of 5M NaOH are needed to neutralize 40mL of 2M H2SO4
Which description best characterizes the length of a hydrogen bond between water molecules?
This is a fact that Bromine(Br) is larger than chlorine(Cl) but indication of equilibrium constant suggests that a bromo substituent has a less preference for the equatorial position than chloro substituent? Explain it briefly?
Chemical reaction calculations, 1. Unbalanced equation SOCL2(1) + H2O(1) --- SO2(g) + HCl(g). How many molecules of H2O can 35.0 grams of thionyl chloride remove?
what will the pH be after mixing the 100 ml of HCl solution and the solid NaOH together? Assume the addition of NaOH does not change the volume. (Molar Mass NaOH= 40.00 g/mole : Molar Mass HCl = 36.46 g/mole
A sample of vapor occupies a volume of 125 mL at 100 degrees C and 748 torr. What is the volume of the same sample under STP conditions?
What is the final temperature in a squeezed cold pack that contains 40.0 g of NH4NO3 dissolved in 135 mL of water? Assume a specific heat of 4.18 J/(g·°C) for the solution, an initial temperature of 25.0°C, and no heat transfer between the cold pa..
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