Specific heat of common metals (J/g°C)
iron lead magnesium silver
0.449 0.128 1.024 0.233
aluminum
0.900
zinc
0.387
a) A piece of unknown metal with a mass of 92.9 g is heated with 1.28 kJ of energy.
The metal is solid throughout the experiment and the temperature changes from to
22.0°C to 81.1°C. What is the specific heat of the metal?
Answer here J/g°C
b) Which of the following choices could be the identity of the unknown metal?

Ibeg i need 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?