Chemistry, 29.08.2019 17:30, jocelyntucker
After completing an experiment to determine gravimetrically the percentage of water in a hydrate, a student reported a value of 38 percent. the correct value for the percentage of water in the hydrate is 51 percent. which of the following is the most likely explanation for this difference?
a) strong initial heating caused some of the hydrate sample to splatter out b) the dehydrated sample absorbed moisture after heating c) the amount of the hydrate sample used was too small d) the crucible was not heated to constant mass before use e) excess heating caused the dehydrated sample to decompose
Answers: 1
Chemistry, 21.06.2019 18:10, hannacarroll2539
The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?
Answers: 1
Chemistry, 22.06.2019 21:30, rondonalba
Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet
Answers: 2
After completing an experiment to determine gravimetrically the percentage of water in a hydrate, a...
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