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Gold forms a substitutional solid solution with silver. Compute the weight percent of gold that must be added to silver to yield an alloy that contains 6.5 × 1021 Au atoms per cubic centimeter. The densities of pure Au and Ag are 19.32 and 10.49 g/cm3, respectively. Also, the atomic weights for gold and silver are 196.97 and 107.87 g/mol, respectively.
A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml .(a)find the mean volume and deviation from the mean for each and calculate the average deviation from the mean (b) calculate the relative deviation (in %) for this set of data. Relative deviation (%) ..
when 25.0 ml of 0.500m h2so4 is added to 25.0ml of 1.00m koh in a coffee cup calorimeter at 23.5 degrees cel the
A 0.08468 g sample of gas occupies 10.0-mL at 291.0 K and 1.10 atm. Upon further analysis, the compound is found to be 13.068% C and 86.932% Br. What is the molecular formula of the compound
the xy-plane and the C-atom skeleton lies on the x axis, what is the hybridization of C for the right-side CH2 group?
A student measures the volume of water delivered by a 1 mL volumetric pipette several times and records measurements of 1.00, 0.97, 1.03, 1.01 and 1.03 mL. What is the average of the five measurements. Report your answer to 5 significant figures a..
A solution is initially 2.5 x 10-3 M in Cu+ and 2.5 x 10-3 in Pb 2+. Iodine ion is gradually added to the solution. Determine the concentrations of Cu+, Pb +2, and I- at the point of maximum separation. The solubility products of CuI and PbI2 are ..
The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrofluoric acid.F2(g) + NH3(g) -> N2F4(g) + HF(g)
She claims that the uncertainty of the bacterium's position is greater than the microscope's viewing field, and the bacterium is thus impossible to locate. What is the uncertainty of the position of the bacterium?
A student standardizes his NaOH titrant solution with KHP. He performs three titrations - in each trial, the mass of KHP (204.22 g/mol) used is 1.500 g. The average amount of NaOH used in the standardization is 29.3 mL +/- 0.06 mL.
In a calibration of a calorimeter, 50.0 g of water at 60.0 c is added to 50.0 g of water at 20.0 c to give a mixture at 39.0 c. what is the heat capacity of the calormieter used in this experiment. If calorimeter has a mass of 5.4 g, what is it sp..
how many moles of sodium hypobromite rm nabro should be added to 1.00 rm l of 5.0times10-2 m hypobromous acid rm hbro
A tank contains helium for filling balloons. It holds 6.75 L of He at 49.6 atm and 25.1 °C. What would be the volume of this helium at 1.66 atm and 10.7 °C
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