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natka813 [3]
3 years ago
7

Water is known as the "universal solvent." What is the best synonym for "solvent?"

Chemistry
1 answer:
svetoff [14.1K]3 years ago
6 0
Solvent- generally in liquid form – are used to dissolve, suspend or extract other materials, usually without chemically changing either the solvents or the other materials. this means the answer is A
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12oz of water initially at 75oF is mixed with 20oz of water intiially at 140oF. What is the final temperature?
Kaylis [27]

Answer:

115.625^{\circ}\text{F}

Explanation:

m_1 = First mass of water = 12 oz

m_2 = Second mass of water = 20 oz

\Delta T_1 = Temperature difference of the solution with respect to the first mass of water = (T-75)^{\circ}\text{F}

\Delta T_2 = Temperature difference of the solution with respect to the second mass of water = (T-75)^{\circ}\text{F}

c = Specific heat of water

As heat gain and loss in the system is equal we have

m_1c\Delta T_1=m_2c\Delta T_2\\\Rightarrow m_1\Delta T_1=m_2\Delta T_2\\\Rightarrow 12(T-75)=20(140-T)\\\Rightarrow 12T-900=2800-20T\\\Rightarrow 12T+20T=2800+900\\\Rightarrow 32T=3700\\\Rightarrow T=\dfrac{3700}{32}\\\Rightarrow T=115.625^{\circ}\text{F}

The final temperature of the solution is 115.625^{\circ}\text{F}.

3 0
2 years ago
Why do my teacher's overload me with work?
Studentka2010 [4]

Answer:

for you to get smarter

Explanation:

8 0
2 years ago
Swer questions 12 B D 12 Classify each model A-D as either an ele- ment, a compound, or a mixture. Explain your reasoning for ea
MrRissso [65]

Answer:

13-b

Explanation:

because 13-b is close to a and 12

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2 years ago
Before applying the corkscrew, Lucas discovers a bit of mold on the cork of a bottle of Pinot Noir. Lucas should A. ignore the m
Alenkinab [10]
<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>
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Do you agree or disagree for each one of them and provide evidence why??​
sergiy2304 [10]

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.
6 0
2 years ago
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