Chemistry, 24.01.2020 23:31 anyone2562
The flame in a torch used to cut metal is produced by burning acetylene (c2h2) in pure oxygen. assuming the combustion of 1 mole of acetylene releases 1251 kj of heat, what mass of acetylene is needed to cut through a piece of steel if the process requires 20.7 Γ 104 kj of heat?
Answers: 2
Chemistry, 22.06.2019 15:00
What does the symbol (βhfus) indicate in a phase change?
Answers: 1
Chemistry, 22.06.2019 15:20
Select the most likely product for this reaction: koh(aq) + co2(g) β ? k2co3(aq) + h2o(1) k(s) + h2(g) + o2(g) k(s) + co3(9) +h2
Answers: 2
Chemistry, 22.06.2019 22:30
Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt
Answers: 1
Chemistry, 23.06.2019 07:00
The following transition occurs at a molecular level for a substance. what transition corresponds to this change in microscopic structure? the carbon dioxide molecules on the left are in a regular, tightly packed pattern. after heating, it becomes much lower density. a. melting b. boiling c. sublimation d. freezing
Answers: 1
The flame in a torch used to cut metal is produced by burning acetylene (c2h2) in pure oxygen. assum...
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