Chemistry, 28.01.2020 01:31 arlabbe0606
Question 12 a chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. the concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. here's how the student prepared the solution: the label on the graduated cylinder says: empty weight: 8.2g she put some solid sodium thiosulfate into the graduated cylinder and weighed it. with the sodium thiosulfate added, the cylinder weighed 76.148g . she added water to the graduated cylinder and dissolved the sodium thiosulfate completely. then she read the total volume of the solution from the markings on the graduated cylinder. the total volume of the solution was 172.7ml . what concentration should the student write down in her lab notebook? be sure your answer has the correct number of significant digits.
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Chemistry, 22.06.2019 05:00
Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.
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Chemistry, 22.06.2019 11:00
Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.
Answers: 1
Chemistry, 22.06.2019 21:50
Given the data below for the reaction, 2 a + 2 b + 4 c => d + e + 3 f, the reaction is fill in the [ ] order in a, fill in the [ ] order in b, fill in the [ ] order in c and fill in the [ ] order overall. (use the words "first, second, third, fourth" to fill each blank)experimentinitial conc of a, mol/l initial conc of b, mol/l initial conc of c, mol/l initial rate, mol/l.s1 0.1 0.1 0.2 2 x 10-32 0.2 0.3 0.2 6 x 10-33 0.3 0.1 0.2 2 x 10-34 0.4 0.3 0.4 1.2 x 10-2
Answers: 2
Chemistry, 23.06.2019 00:00
2-bromo-2-methylbutane undergoes an e1 elimination reaction in the presence of ethanol. in the next reaction only one of the possible products is represented. although the product shown is not the major product of the reaction, notice that there is more than one way it can be produced. complete the mechanism and draw the missing substances.
Answers: 1
Question 12 a chemistry student must write down in her lab notebook the concentration of a solution...
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