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Shtirlitz [24]
3 years ago
15

Why do ice cubes formed from water of a glacier freeze at a higher temperature than ice cubes formed from water of an undergroun

d aquifer?
Chemistry
2 answers:
allsm [11]3 years ago
7 0
Water of an underground aquifer is likely to have more minerals dissolved in it. 
<span>for each mole of ions & molecules in 1 kilogram of water, the water freezes 1.86 degrees Celsius colder than zero C. T</span><span>he water form glacial melt should have less minerals and should freeze closer to that of pure water at zero celsius. </span>
Pavel [41]3 years ago
6 0
If they are underground they are closer to the earths core where it is hotter
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Which of the following statements is true about a hypothesis?
Tatiana [17]
A hypothesis is a prediction of what you believe to be true.
8 0
3 years ago
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If equal volumes of 0.1 M HCl and 0.2 M TRIS (base form) are mixed together. The pKa of TRIS is 8.30. Which of the following sta
blondinia [14]

Answer:

option D is correct

D. This solution is a good buffer.

Explanation:

TRIS (HOCH_{2})_{3}CNH_{2}

if TRIS is react with HCL it will form salt

(HOCH_{2})_{3}CNH_{2} + HCL ⇆   (HOCH_{2})_{3}NH_{3}CL

Let the reference volume is 100

Mole of TRIS is =  100 × 0.2 = 20

Mole of HCL is =  100 × 0.1 = 10

In the reaction all of the HCL will Consumed,10 moles of the salt will form

and 10 mole of TRIS will left

hence , Final product will be salt +TRIS(9 base)

H = Pk_{a} + log (base/ acid)

8.3 + log(10/10)

8.3

6 0
3 years ago
Chlorofluorocarbons (CFCs) are no longer used as refrigerants because they destroy the ozone layer. Trichlorofluoromethane (CCl₃
Daniel [21]

Answer:

The molar entropy of the evaporation of Trichlorofluoromethan is 83.516 J/molK.

Explanation:

Entropy :It is defined as amount of energy which is unable to do work or the measurement of randomness or disorderedness in a system.

S=\frac{Q}{T(Kelvins)}

Molar heat of molar vaporization of Trichlorofluoromethane = 24.8 kJ/mol

Temperature at which Trichlorofluoromethan boils , T= 296.95 K

The molar entropy of the evaporation of Trichlorofluoromethan :

=\frac{24.8 kJ/mol}{296.95 K}=0.083516 kJ/mol K = 83.516 J/molK

The molar entropy of the evaporation of Trichlorofluoromethan is 83.516 J/molK.

8 0
3 years ago
A piece of an unknown substance weighing 124.0 grams is heated in boiling water to 100.0oc. when the substance is placed in a ca
MakcuM [25]

The heat cause 300g water temperature increase from 20 to 26 celcius. The heat transferred would be: 300g * (26 °C -20 °C) *4.2 joule/gram °C= 7560J

The unknown substance is added to the water, so its final temperature should be the same as the water. The calculation would be:

7560J= 124g * (100-26)* specific heat

specific heat= 7560J / 124g / 74 °C= 0.8238 J/gram °C

3 0
4 years ago
A box has a mass of 150kg. If a net force of 3000N acts on the box, what is the box's acceleration?
zhannawk [14.2K]

Answer:

3000 ÷ 150

Explanation:

acceleration = N/kg

4 0
3 years ago
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