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A street merchant is trying to sell you a 14 karat gold bracelet for 450$ ( 100% pure gold is 24 karats). The gold is alloyed with copper. Before buying the item you weigh it out to be 110 grams, you also measure its water displacement as 7.59ml. what is the percent composition of the gold bracelet? should you call the cops? Density of gold is 19.3 g/ml and the density of copper is 8.92 g/ml.
Why is methyl m-nitrobenzoate formed in the nitration of methyl benzoate instead of o- and p- What product would you expect if methyl benzoate underwent dinitration
Calculate the weight of potassium chlorate required to prepare 380 mL of wet oxygen collected over water at 20 Celcius and 750 mm of Hg.
Draw a resonance structure, complete with all formal charges and lone (unshared) electron pairs, that shows the resonance interaction of the acetyl with the ortho position in acetophenone
Calculate [Cr3+] in equilibrium with Cr(OH)4- when 0.01 mol of Cr(NO3)3 is dissolved in a liter of solution buffered at pH 10.0
compute the change in temperature for 4.50 grams of calcium chloride cacl2 dissolved in 90.0 ml of water h2o. assume
What is the volume of added base at the equivalence point for HCl. What is the volume of added base at the equivalence point for HF
The products include Cr3+ ion and I2. What was reduced in the reaction and what was the reducing agent?
A 2L cylinder of gas contains 2.4 moles of gas at 34 degrees Celsius. What is the pressure?
How many grams of MgCl2 would be needed to prepare 1.000 L of a solution that is 236 ppm in Mg2+ ions? Note: there is one Mg2+ ion in every MgCl2. Report your answer to the correct number of sig figs.
Pre-Lab Assignment- Understanding Activity 3 in this manual and significant figures and uncertainty in measurements in general will help you answer the last two questions
Determine the concentration of CO32- ions in a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1 = 4.3 x 10-7 and Ka2 = 5.6 x 10-11."
Calculate concentrations of H30+ and the pH of each acidic solution. Since HCl is a monoprotic acid, the H30+ concentrations are equivalent to HCl. First do equation: (M con)(V con)=(M dil)(V dil)
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