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What is the maximum concentration of Mg2+ ion that can remain dissolved in a solution that contains 0.7719 M NH3 and 0.3031 M NH4Cl?
Ksp for Mg(OH)2 is 1.5 × 10^-11Kb for NH3 is 1.8 × 10^-5
the system achieves thermoequilibrium at atmospheric pressure. Assume no heat loss to the surroundings. What is the final temperature of the combined metal sheets?
When a 2.41x102 g strip of zinc is dropped into a large beaker containing excess hydrochloric acid, how many grams of gas are formed.
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.508g/L at 25C and 721mmHg?
Mehtanol-water solutions behave as essentially ideal solutions (the activity coefficients which measure deviation from ideality are equal to or close to one).
Assuming the density of water is 1.00g/mL at ambient temperature, what is the exact volume (in mL) of the 250-mL Erlenmeyer flask?
what is the total number of joules of heat energy absorbed when the temperature if 200.0g of water is raised from 10 degrees celcius to 40 degrees celcius.
Some sugar substitutes are made from derivatives of sucrose. SucraloseTM is a sweetener found in soft drinks and low-calorie foods such as yogurt.
If 25 mL of 7.0 M H_2SO_4 was spilled, what is the minimum mass of NaHCO_3 that must be added to the spill to neutralize the acid?
ow many stereo-isomers would there be if a molecule had four chiral centres, Rank the different carbocations in order of their stability.
If 85 J of heat are added to a pure gold coin with a mass of 15g , What is its temperature change? Specific heat capacity of gold is 0.128.
A piece of a newly synthesized material of mass 25.0 g at 80.0C is placed in a calorimeter containing 100.0 g of water at 20.0C. If the final temperature of the system is 24 0C
A sample of concrete contains cement, gravel, crushed rocks, sand, and water. Each of these contains different metals and minerals and hence has different colors and different properties. Which term or terms could be used to describe this sample o..
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