![subject](/tpl/images/cats/himiya.png)
Chemistry, 20.07.2019 02:30 mariahdixon80
Agroup of chemistry students had to identify six white powders. the students used a variety of tests to identify the powders. they computed the density of each powder. they checked to see if any dissolved in water. one of the powders did not dissolve in water and they thought it was cornstarch. someone knew that cornstarch felt slippery and reacted with iodine. the students put a few drops of iodine on each white powder. one powder turned black; they guessed that it was cornstarch. they heated the powders in a bunsen burner flame to see if any would melt. one did and they guessed it might be a sugar. which test result indicated a chemical change had taken place? a) dissolves in water b) feels slippery in water c) melts when heated in a flame d) turns black when iodine is added
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Chemistry
![image](/tpl/images/cats/himiya.png)
Chemistry, 21.06.2019 13:30, astultz309459
What is the molecular formula of a hydrocarbon with m+ = 166? (write the formula with no subscripts, e. g. c4h10.) what is the sum of rings and double bonds in this compound?
Answers: 1
![image](/tpl/images/cats/himiya.png)
Chemistry, 21.06.2019 14:00, fgcherubin
Consider the balanced equation below. n2h4 + 2h2o2 n2 + 4h2o what are the mole ratios of hydrazine (n2h4) to hydrogen peroxide (h2o2) and hydrazine to water? 1: 2 and 1: 4 1: 3 and 1: 4 1: 2 and 3: 5 1: 3 and 3: 5
Answers: 3
![image](/tpl/images/cats/himiya.png)
![image](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 23:00, lufung8627
Consider the reaction: 2al(s) + fe2o3(s) → al2o3(s) + 2fe(s) the δhf for fe2o3(s) = -824.3 kj/mole. the δhf for al2o3(s) = -1675.7 kj/mole. finish the equation. δhrxn = [(1)( kj/mole) + (2)( kj/mole)] - [(1)( kj/mole) + (2) ( kj/mole)]
Answers: 1
You know the right answer?
Agroup of chemistry students had to identify six white powders. the students used a variety of tests...
Questions in other subjects:
![Konu](/tpl/images/cats/biologiya.png)
Biology, 01.01.2021 22:10
![Konu](/tpl/images/cats/informatica.png)
Computers and Technology, 01.01.2021 22:10
![Konu](/tpl/images/cats/fizika.png)
![Konu](/tpl/images/cats/health.png)
Health, 01.01.2021 22:10
![Konu](/tpl/images/cats/mir.png)
![Konu](/tpl/images/cats/ekonomika.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 01.01.2021 22:20
![Konu](/tpl/images/cats/istoriya.png)
![Konu](/tpl/images/cats/istoriya.png)