Chemistry, 27.07.2019 03:30 trinitymarielouis
Astudent poured 50.0 ml of 1.25 mol/l nitric acid - hno3- into a polystyrene cup and recorded that the temperature was 23.5°c. she then added 50.0 ml of 1.25 mol/l potassium hydroxide-koh- and found the temperature rose to 32.4°c. i. write a chemical equation representing the neutralisation reaction of the two chemicals. 2 marks) ii. calculate the enthalpy of neutralisation, given that the specific heat of water is 4.18 j/goc and the density of the solutions was 1.00 g/ml. 4 marks] b) in a laboratory experiment, 2.20 g of propanone - c3hso- was burned completely in oxygen. the heat from this combustion was used to raise the temperature of 100g of water from 18.9°c to 96.3°c calculate the enthalpy of combustion of propanone in kj/mol.
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Chemistry, 22.06.2019 17:30, katherineweightman
What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.
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Chemistry, 23.06.2019 01:30, bgarrison364
What is produced from neutralization of an acid and a base? a. hydronium ions b. citric acid c. salt and water
Answers: 1
Astudent poured 50.0 ml of 1.25 mol/l nitric acid - hno3- into a polystyrene cup and recorded that t...
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