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adoni [48]
3 years ago
13

High temperature refrigeration is that produced by ____. A. heat from a furnace B. an air-conditioning system C. the vegetable c

ooling system of a refrigerator D. the freezer section of a refrigerator
Chemistry
1 answer:
seropon [69]3 years ago
4 0

Answer:

B. an air-conditioning system.

Explanation:

Refrigeration is defined as a process of cooling a system to lower temperature below the surrounding temperature while the removed heat is rejected at higher temperatures.

Heat pumps use the heat output of the refrigeration process, which may also be designed to be reversible, but are otherwise similar to air conditioning units.

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Which compound would have the lowest melting point?
IRINA_888 [86]
The chemical with the lowest point is helium
7 0
3 years ago
6)
MrMuchimi

Answer:

(4) Water, stirring, and filtering  

Explanation:

The added water will dissolve the sugar but not the sand. When you filter the mixture, the sand will be trapped in the filter paper and the dissolved sugar will pass through the pores of the paper.

(1) and (2) are wrong. You don't separate a mixture of sugar and sand by adding more sand. Furthermore, neither substance will boil at 100 °C.

(3) is wrong. You can dissolve the sugar in water but, if you boil the water away, the sugar and sand will still be together.

7 0
4 years ago
What would be the mass, in grams, of 3.50 x 1025 molecules of chlorine?<br><br> Show your work
Maurinko [17]

Answer:

2059.645g Cl

Explanation:

A mole of any element contains 6.022e23 molecules, so we will divide the given amount of molecules by 6.022e23.

3.5e25 / 6.022e23 = 5.81e1

5.81e1 = 58.1 mol Cl

Now that we have found the amount of moles of Chlorine, we will multiply the number of moles by the molar mass of Chlorine, which is 35.45g/mol.

35.45(58.1) = 2059.645g Cl

4 0
3 years ago
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