Calculate the volume of nitrogen dioxide produced at 712.5 torr and 23.3°C by the reaction of 7.85 cm3 copper (density = 8.95 g/cm3) with 207.3 mL of concentrated nitric acid if the acid has a density of 1.42 g/cm3 and contains 68.0% HNO3 by mass). Cu(s) + 4HNO3(aq) → Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l)

why do atoms aproach each other?

Why is copper sulfate (CuSO4 ) not commonly found as a naturally-occurring copper ore mineral, even though it is easily made during leaching of other copper minerals?

4.60 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.10 M, where it remained constant.

A(s) <===> B(g) + C(g)

Then, the container volume was doubled and equilibrium was re-established. How many moles of A remain?

Saturated steam at 100 C is heated to 400 C. Use the steam table to determine the required heat input if continuous stream flowing at 150 kg/min undergoes this process at constant pressure.

Consider the reaction

2AgNO3(aq) + H2SO4(aq) -> Ag2SO4(s) + 2HNO3(aq)

You combine 2.33ml of 1.77M AgNO3(aq) and 1.77mL of 2.33M H2SO4(aq) and the react according to the reaction above. a)How many grams of Ag2SO4(s) could you make? b) How many individual units of the polyatomic species, NO3-, would be in solution?

Please answer both questions.

One millimole of Ni(NO₃)₂ dissolves in 270.0 mL of a solution that is 0.400 M in ammonia.
The formation constant of Ni(NH₃)₆²⁺ is 5.5×10⁸.

1. What is the initial concentration of Ni(NO₃)₂ in the solution?

2. What is the equilibrium concentration of Ni²⁺(aq ) in the solution?

I'm confused on how bonding works with metalloids. Will it be an ionic or covalent bond? For example P and As

Sketch the appearance of the 1 H-NMR spectrum of diethyl ether using J = 6.97 Hz and the data in Q2 in a spectrometer operating at (a) 350 MHz, (b) 650 MHz.

Consider the reaction shown. Suppose Meredith started with 0.51 g of sodium bromide, and 0.46 mL of 2,3-dimethylbutane for her reaction. Assuming the 2,3-dimethylbutane is the limiting reactant, how many grams, in theory, of 2,3-dibromo-2,3-dimethylbutane can be formed in the reaction?

Q2: When 500.0 mL of 2.00 M Ba(NO3)2 solution at 25.0 °C is mixed with 500.0 mL of 2.00 M Na2SO4 solution at 22.0°C in a coffee-cup calorimeter, the white solid BaSO4 forms, and the temperature increases to 28.2°C. Assume that the calorimeter is insulated and has negligible heat capacity, the specific heat capacity of the solution is 4.184 J/g°C, and the density of the final solution is 1.0 g/mL. Answer the questions below using the Balanced Equation: Ba(NO3)2 (aq)+ Na2SO4 > BaSO4 (s) + 2NaNO3 (aq). Answer to correct amount of Significant Figures

Determine the heat of the reaction in J

Determine the pH of an aqueous solution of Fe(CN)₆^3-, prepared using FeCl₃ and NaCN with formal concentrations of 0.001832 M and 0.5120 M.

logK_f(Fe(CN)₆^3-) = 43.6 K_a(HCN) = 6.2x10^-10

Balance these equations for reactions occurring in a basic solution. Don't include physical states for your answer.

CrO₂^- + S₂O₈^2- → CrO₄^2- + SO₄^2-

Au + CN^- + O₂ → Au(CN)₄^- + OH^-

Calculate the pH of the solution after the addition of the following amounts of 0.0536 M HNO3 to a 60.0 mL solution of 0.0750 M aziridine. The pKa of aziridinium is 8.04.

a) 0.00 mL of HNO3; Ph=

b)8.28mL of HNO3; Ph=

c) 42.0ml of HNO3

d) 84.0 mL of HNO3; Ph=

f) 88.5 mL of HNO3; Ph=