Calculate the mass in grams of Cu in brass. Zn has 125g. Cu makes up 67%....
0.25 points Question 2 67 CU %= whole A typical sample of brass is 67% copper and 33% zinc. How many moles of zinc are dissolved in grams of copper? 0.33 moles 0.50 moles 0.67moles 1.0 moles 0.25 points Question 3 When dealing with solutions which of the following laws is not applicable? nition of Energy Question 1 Which of the following techniques can be used to decrease the stability of an aqueous colloidal dispersion? addition of a material which...
Suppose you have a brass surface (~67% Cu(s), 33% Zn(s)) from which a serial number has been filed away. What would happen if this surface was treated with nitric acid (HNO3)?
Cartridge brass is an alloy with a composition of 30 wt% Zn and 70 wt% Cu. The alloy has the FCC structure, and you can assume that the Zn and Cu are randomly distributed over all of the available lattice sites. The density is 8470 kg/m^3. Estimate the lattice parameter of the alloy.
Mixture rules A 70% Cu-30% Zn brass electrical component has been made of powdered metal and contains 15 vol.% porosity. Assume that the pores are dispersed randomly. Given that the resistivity of 70% Cu-30% Zn brass is 62 n m, calculate the effective resistivity of the brass component using the simple conductivity mixture rule, Equation 2.32, and the Reynolds and Hough rule. (1 ) Pet=Pe (1-Xa) (Pa> 10p) [2.32] Mixture rule
A brass alloy contains 82.5% copper, Cu, by mass with the remainder of the alloy being zinc, Zn. Determine the number of moles of zinc in 41.2 g of the brass alloy. moles of Zn = Determine the number of atoms of zinc in 41.2 g of the brass alloy. atoms of Zn =
Dimensional Analysis: Calculate the density of a liquid, in grams/cm^3, if it has a mass of 23.2 grams and occupies a container with dimensions of 1.3cm x 5.6cm x 2.3in.
A bullet with mass 67 grams hits a pendulum with length 30 cm and mass 204 grams and lodges in it. When the bullet hits the pendulum it swings up from the equilibrium position and reaches an angle 25 degrees at its maximum. What is the bullet’s velocity in meters per second?
calculate the mass in grams for each of the following 0.75 mole of Cu
A zinc-copper battery is constructed as follows: Zn | Zn+2(0.10 M) || Cu+2 (2.50 M)| Cu The mass of each electrode is 200.0 g. Each half cell contains 1.00 liter of solution. a) Calculate the cell potential when this battery is first connected. b) Calculate the cell potential after a current of 10.0 amperes has flowed for 10.0 hours. c) Calculate the mass of each electrode after 10.0 hours. d) What is the total life span of this battery, delivering...
+ Calculate the change in the standard free energy for the following reaction: Zn + Cu?+ Zn²+ (aq) + Cu (3) Standard Reduction Potentials (5) (aq) + 2e → = -0.763 V (aq) + 2e → Cu (s) Ered = 0.337 V (aq) → → Zn (5) Ered Zn2+ Cu2+ A. - 212 kJ/mol B. 175 kJ/mol C. 81.0 kJ /mol OD. - 106 kJ / mol