Chemistry, 23.09.2019 15:10 kklove6700
The melting of wax is a physical change, yet the burning of wax is a chemical change. what is the essential difference between the physical change and the chemical change of wax in a burning candle?
a. the burning of wax forms new compounds, while the melting of wax does not.
b. a higher temperature is needed to burn wax than to melt wax.
c. melted wax can be separated into other substances, while solid wax cannot.
d. melted wax is a different phase of matter than solid wax.
Answers: 1
Chemistry, 21.06.2019 21:40
During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.
Answers: 2
Chemistry, 22.06.2019 05:30
Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases
Answers: 2
Chemistry, 22.06.2019 15:40
Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n
Answers: 2
Chemistry, 22.06.2019 18:00
Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?
Answers: 2
The melting of wax is a physical change, yet the burning of wax is a chemical change. what is the es...
Chemistry, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31
History, 28.01.2020 02:31
Mathematics, 28.01.2020 02:31