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Jordin
Questions (8)
Crude oil is a mixture of many different components. The extraction of crude oil from the Earth is important, but its refinement
3 answers
566 views
What led to the end of Egypt's power in the Nile River valley
2 answers
637 views
Calculate the enthalpy change for the reaction:
2S(s) + 3O2(g) --> 2SO3(g) Use the following thermochemical equations: Reaction
2 answers
7,384 views
Copper metal can be obtained by heating copper oxide in the presence of carbon monoxide, CO, according to the reaction:
CuO(s) +
2 answers
1,236 views
The unbalanced equation for the combustion of ethanol is as follows:
C2H5OH(l) + O2(g) �¨ CO2(g) + H2O(g) How much heat, in kJ,
1 answer
860 views
A 2.25 g sample of hydrazine, N2H4, is burned in a bomb calorimeter that contains 6,402.45 g of H2O, and the temperature
1 answer
935 views
When 25.0 g of ethanol vapor condenses, 23.6 kJ of heat is released. How much heat is required in kJ to vaporize 254 g of
1 answer
1,414 views
A 0.2528 g sample of a mixture containing sodium carbonate and sand requires 12.32 mL of 0.2409 M HCl(aq). Assuming that the
4 answers
1,200 views
Answers (5)
2.4 meters
the answer is C.
ya Mum.
Oh ok, I see what I did now. Thank you for the help! : )
Thank you! So, is this correct? moles HCl = M x L = .2409 X .01232 = .00297 moles Na2CO3 = 1/2 moles HCl (from the equation). = .00297 / 2 = .00148 g Na2CO3 = moles x molar mass .00148 X 106 = .157 %Na2CO3 = (mass Na2CO3/mass sample)*100 = ?? .157 / .2528
