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4vir4ik [10]
2 years ago
6

How will adding NaCl affect the freezing point of a solution?

Chemistry
1 answer:
zaharov [31]2 years ago
7 0
Answer is: adding NaCl will lower the freezing point of a solution. A solution (in this example solution of sodium chloride) freezes at a lower temperature than does the pure solvent (deionized water). The higher the solute concentration (sodium chloride), freezing point depression of the solution will be greater.
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A bus travels 20km in 30minutes what is the average speed of the bus?
Vera_Pavlovna [14]

Answer:

40km/hr

Explanation:

Speed = Distance ÷ Time and since they both have different units we have to change one of them. Therefore if we change 30 minutes to half an hour we say 20km ÷ ¹/2

7 0
2 years ago
The ΔHcomb value for anethole is -5539 kJ/mol. Assume 0.840 g of anethole is combusted in a calorimeter whose heat capacity (Cal
bonufazy [111]

Answer:

Final temperature of calorimeter is 25.36^{0}\textrm{C}

Explanation:

Molar mass of anethole = 148.2 g/mol

So, 0.840 g of anethole = \frac{0.840}{148.2}moles of anethole = 0.00567 moles of anethole

1 mol of anethole releases 5539 kJ of heat upon combustion

So, 0.00567 moles of anethole release (5539\times 0.00567)kJ of heat or 31.41 kJ of heat

6.60 kJ of heat increases 1^{0}\textrm{C} temperature of calorimeter.

So, 31.41 kJ of heat increases (\frac{1}{6.60}\times 31.41)^{0}\textrm{C} or 4.76^{0}\textrm{C} temperature of calorimeter

So, the final temperature of calorimeter = (20.6+4.76)^{0}\textrm{C}=25.36^{0}\textrm{C}

3 0
3 years ago
According to the MyPyramid plan, which foods should be the smallest portion of a teen’s diet?
Jobisdone [24]
The answer is GRAINS 


i realy hope this helped 


7 0
3 years ago
Read 2 more answers
Which of the primary component of natural gas? ​
kipiarov [429]
The answer is Methane!
4 0
3 years ago
One liter of water at 10 degrees celsius is added to one liter of water at 80 degrees celsius. what is the final temperature of
notka56 [123]
Find the average of these 2 temperatures, since they have the same volume.

(80 + 10) ÷ 2 = 90 ÷ 2 = 45°C

You can only use this method of averaging them out because they have the same volumes :)
3 0
3 years ago
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