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maryanne
Questions (7)
23. Lois built a rectangular flower bed. She used four boards for the border of the flower bed. Two of the boards were 4 feet
2 answers
831 views
28.06 mL to grams
1 answer
325 views
to DrBob222 wouldn't it be like this then 4.86L/12.75kg*1000cm^3/1L*(1kg/1000g)^3
1 answer
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An aluminum engine block has a volume of 4.86 L and a mass of 12.75 kg. What is the density of the aluminum in grams per cubic
2 answers
615 views
What is the total resistance in a parallel circuit with a 10 ohm lamp and a 15 ohm lamp?
1 answer
1,170 views
i have one more question:
I know this one has to do with hess's law but i'm not sure of how to get the enthalpy of vaporization
2 answers
731 views
A 1.50g sample of NH4NO3(s) is added to 35.0g of water in a foam cup and stirred intil it dissolves. The temperature of the
7 answers
3,706 views
Answers (5)
I am unable to make the figure (with both boards) to begin with...
thanx so much!
ya you're right i accidently put the wrong value in!
i have one more question: I know this one has to do with hess's law but i'm not sure of how to get the enthalpy of vaporization? Clculate the enthalpy of vaporization of solid potassium bromide to a gas of ions, the process KBr--->K{+1}(g)+Br{-1}(g), from
I got: delta H= 482.79J 482.79/150gNH4NO3 x 80gNH4NO3/mol NH4NO3 =2574.88J/mol =2.575 kJ/mol Is this right?
