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__________-orbitals are spherically symmetrical.

How many orbitals are allowed in a subshell if l = 2?

The value of ΔH° for the reaction below is -186 kJ. Calculate the heat (kJ) released from the reaction of 25 g of Cl2.H2 (g) + Cl2 (g) → 2HCl (g)

Which of the following has a ΔH°f= 0 kJ/mol?

A 22.44 g sample of iron absorbs 180.8 J of heat, upon which the temperature of the sample increases from 21.1°C to 39.0°C. What is the specific heat of iron (J/g°C)?

An endothermic reaction causes the surroundings to 

If [a] g MgO is combined with 100.0 mL of 1.00 M HCl in a coffee cup calorimeter, the temperature of the HCl solution increases from 24.2 °C to [b]°C. Assume that the specific heat of the HCl solution is 4.18 J/g·°C and its density is 1.00 g/mL.Calculate ΔH rxn for the reaction, in kJ per mole of MgO. (Enter numerical value only, with proper number of significant figures and no units)

How much energy is required to change the temperature of 15.0 g Fe from 18.5 °C to 56.8 °C?  The specific heat of iron is 0.451 J/g·°C.

Given the thermochemical equation: 2Cu2O(s) –> 4Cu(s) + O2(g)             ΔH= +333.8 kJ/mol Calculate the mass of copper produced when 1.47 x 104 kJ is consumed in this reaction.

The value of ΔH° for the reaction below is -186 kJ. Calculate the heat (kJ) released from the reaction of 25 g of Cl2.H2 (g) + Cl2 (g) → 2HCl (g)