Chemistry, 02.04.2021 02:00 aidanwindsor1738
Once all safety equipment is in place, each student places a piece of aluminum foil into a test tube of hydrochloric acid. After a few seconds, the aluminum foil disappears and the bottom of the test tube feels hot. The balanced chemical reaction demonstrated in the investigation is shown below.
6HCl + 2Al à 3H2 + 2AlCl3
What evidence of a chemical reaction should the students cite for this investigation?
F. Change in color
G. Production of a gas
H. Increase in temperature
J. Formation of a precipitate
Answers: 1
Another question on Chemistry
Chemistry, 21.06.2019 20:30
14. complete and balance the equations for the single displacement reactions. a. zn + pb(no3)2 -> b. al + niso4 -> 15. complete and balance the equations for the double displacement reactions. a. agno3(aq) + nacl(aq) -> b. mg(no3)2(aq) + koh(aq) -> 16. complete and balance the equations for the combustion reactions. a. __ ch4 + o2 -> b. __ c3h6 + o2 -> c. + o2 ->
Answers: 2
Chemistry, 22.06.2019 10:50
8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm
Answers: 1
Chemistry, 22.06.2019 18:00
The fact that the total amount of energy in a system remains constant is a(n)
Answers: 1
You know the right answer?
Once all safety equipment is in place, each student places a piece of aluminum foil into a test tube...
Questions
Mathematics, 28.12.2019 21:31
Health, 28.12.2019 21:31
Mathematics, 28.12.2019 21:31
Mathematics, 28.12.2019 21:31
History, 28.12.2019 21:31
Mathematics, 28.12.2019 21:31
