General Chemistry Answers

What pressure will be exerted by 0.041 mole of gas contained in an 500 vessel at 310 K?

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Given: 2X(g) ⇌ Y(g) + Z(g) Ke = 15

If 2.0 mol of Y and 2.0 mol of Z are injected into an empty 4.0 L container, then find the resulting

equilibrium concentration of X.

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127 grams of copper completely reacts with silver nitrate in the reaction Cu + 2 AgNO₃ -> CuNO₃)₂ + 2 Ag

what mass of silver is produced?

127 grams of copper completely reacts with silver nitrate in the reaction Cu + 2 AgNO₃ -> CuNO₃)₂ + 2 Ag

how many moles of AgNO₃ are consumed?

127 grams of copper completely reacts with silver nitrate in the reaction Cu + 2 AgNO₃ -> CuNO₃)₂ + 2 Ag

how many moles of copper are consumed?

i. State THREE (3) properties of covalent compounds.

ii. Draw the Lewis structure for the molecule of ammonia (NH₃).

iii. State the geometry of, and the bond angles in, the ammonia (NH₃) molecule.

iv. PH₃ has the same geometry as NH₃, however, the bond angle in PH₃ is less than that in NH₃. Provide an explanation for this observation. 

State the geometry of, and the bond angles in, the ammonia (NH3) molecule. 

PH3 has the same geometry as NH3, however, the bond angle in PH3 is less than that in NH3. Provide an explanation for this observation. 

The reaction of methane with fluorine occurs by the following equation: CH4 (g) + 2F2 (g) → CF4 (g) + 2H2 (g) iii. Calculate the enthalpy change (ΔH) of the reaction, given the average bond dissociation energies (D) in the table below. Bond C-F C-H F-F H-H D (kJ mol-1 ) 450 410 158 436

Using the following standard reduction potentials:

Ag⁺ (aq) + e^- ⇌ Ag (s) E^o = +0.80 V

Pb²⁺ (aq) + 2e^- ⇌ Pb (s) E^o = -0.13 V

i. Write a balanced redox reaction that represents the overall cell reaction for the feasible galvanic cell.

ii. Calculate the standard cell potential.

iii. Draw a fully labelled galvanic cell for this redox system. Your labels should show (but not limited to): the electron and ion flow; the anode and cathode, the half cells where oxidation and reduction take place.