Answer:
Explanation:
= First mass of water = 12 oz
= Second mass of water = 20 oz
= Temperature difference of the solution with respect to the first mass of water = 
= Temperature difference of the solution with respect to the second mass of water =
c = Specific heat of water
As heat gain and loss in the system is equal we have
The final temperature of the solution is .
Answer:
13-b
Explanation:
because 13-b is close to a and 12
<span>The question says,'before applying the corkscrew, Lucas discovers a bit of mold on the cork of a bottle of Pinot Noir. Lucas should............. The correct option is B. The standard method of removing mold from wine cork is to dampen a clean napkin with water and use it to wipe the mold away from the cork. The cork should then be removed and the outside and the inside of the wine neck must be cleaned thoroughly as well.</span>
Answer:
Disagree
Agree
Agree
Disagree
Explanation:
A chemical change is one in which a new kind of substance is formed. It is always accompanied by energy changes.
- It is wrong to assert that all chemical changes are dangerous. In our body system, chemical changes are constantly happening.
- Chemical changes shows the law of conservation of mass in that the amount of reactants and products are always the same.
- Chemical reactions occur when two substances are chemically combined together.
- Not all dissolution reaction are chemical changes. For example, when sugar dissolves in water, it is not a chemical change.
