Answer:
A. a wild dog that finds and mates with a domestic dog.
Explanation:
Answer :
An egg cooking is an endothermic reaction.
A candle burning and Plaster & water combining and becoming warm are exothermic reaction.
Salt being added to water, with no change in temperature neither endothermic nor exothermic reaction.
Explanation :
- Endothermic reaction : It is a type of reaction in which energy is absorbed in the form of heat from the surroundings.
- Exothermic reaction : It is a type of reaction in which energy is released in the form of heat from the system.
An egg cooking : In this process, the energy is absorbed in the form of heat.
A candle burning and Plaster & water combining and becoming warm : In both the process, the energy is released in the form of heat.
Salt being added to water, with no change in temperature : In this process, neither energy released nor absorbed.
Pasteur said that heating the wine at about 120°F would make sure that the wine would not turn sour, so the option is A.
Here's the information link: http://www.faqs.org/health/bios/83/Louis-Pasteur.html
The H+ in a solution that has a Ph of 8.73 is calculate as follows
Ph is always = - log (H+)
H+ = 10^-Ph
H+ is therefore = 10 ^- 8.73
H+ = 1.86 x10^-9 M
Answer:
Decomposition of hydrogen peroxide: 2H2O2 --> O2(g) + 2H2O(l) How many molecules of water are produced from the decomposition of 3.4g of hydrogen peroxide, H2O2
Explanation:
We are looking at the decomposition of hydrogen peroxide into water and oxygen gas:
2H2O2 --> 2H2O + O2
We are starting with 3.4 g of H2O2. First we need to convert this to moles. The molecular weight of H2O2 is 34 g/mol
3.4 g *...