Answer:
The following statements apply to the general experimental procedure for determining the heat of reaction:
A. Measurements of the temperature of the solution in the calorimeter should be taken at regular intervals for several minutes before the reactant is added.
B. The solution in the calorimeter should not be stirred during the experiment because stirring will slow the reaction
D. Temperature readings need to be taken at regular intervals after the highest temperature reading is observed to determine the rate of heat loss from the calorimeter.
Explanation:
If you are requesting a definition of chemistry, here it is per use of google--
The branch of science that deals with the identification of the substances of which matter is composed; the investigation of their properties and the ways in which they interact, combine, and change; and the use of these processes to form new substances.
Answer:
Pb(s)------>Pb2+(aq)
Explanation:
If you look at the oxidation numbers Pb increases from 0 to +2 while Cu decreases from +2 to 0.Hence,Pb is the reducing agent and Cu2+ is the oxidizing agent.
Also, a thing to note is that the oxidation number of any solid is always 0.
~Hope this helps:)
The answer is- Gasoline - homogeneous, Soil- heterogeneous, Cranberry juice - homogeneous and Salt water-homogeneous.
Mixture: The substance that has two or more elements or compounds mixed together without binding them chemically is known as mixture.
The constituents of mixture can be separated by various methods.
What are homogeneous and heterogeneous mixture?
- Homogeneous mixtures- Homogeneous mixtures are those that have same composition throughout its mass and there are no visible boundaries between its components.
- Heterogeneous mixtures- When solute particles are not mixed uniformly in the solvent particles, then a heterogenous mixture is obtained.
- Gasoline: It is a homogeneous mixture of various hydrocarbons.
- Soil: Soil is a heterogenous mixture and its various components can be seen clearly.
- Cranberry juice: It is also a homogeneous mixture as cranberry and water are mixed uniformly.
- Salt water is also a homogeneous mixture as salt and water are mixed uniformly.
To learn more about mixtures visit:
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All acids or acidic compounds react with metals which produces hydrogen.
Acids are also great conductors or electricity and are corrosive which leads them to “eat away” at most things that come into contact with acid.
