Chemistry Answers

what mass of lead (ii) iodide will be formed when 20.0 g of lead (ii) nitrate is added to 33.0g of potassium iodide? which is the limiting reactant?

How much energy was transferred during the phase change shown on the

cooling curve above? Use the phase diagram and table of values below to

help you answer the question.

How many moles of N

N are in 0.024 mol

mol of quinine?

Show two ways from which you can use to prepare propiophenone

what can be observed when you mix copper and copper sulphate

How has Kekulé’s model of benzene been proved wrong? Make sure to reference Bond Length, Bond Enthalpies, Hybridisation, Reactivity and Electron Density

Describe the method for experimental determination of energy changes

accompanying chemical reactions under constant volume conditions.

I have a balloon that can hold 100 liters of air.if I blow up this balloon with 3 moles of oxygen gas at a pressure of 1 atmosphere, what is the temperature of the ballon

Use the thermochemical equations shown below to determine the enthalpy for this reaction: 2 H₂O_(g) + 2 Cl_2(g) → 4 HCl_(g) + O_2(g) 

ΔH_rxn =   

Information:

COCl_2(g) + H₂O_(l) → CH₂Cl_2(l) + O_2(g) 

ΔH = 19 kJ

H₂O(g) →H₂O(l) 

ΔH = -44 kJ

HCl_(g) →1/2 H_2(g) +1/2 Cl_2(g) 

ΔH = 92 kJ

CH₂Cl_2(l) + H_2(g) + 3/2 O_2(g) → COCl_2(g) + 2 H₂O_(l) 

ΔH= -161kJ

find the vapor pressure of a solution containing 35.0g calcium chloride (CaCl2) in 750.0g water. Note that the P_water= 47.1 torr at 37.0 C