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Alja [10]
3 years ago
13

How do you know when a substance is boiling?

Chemistry
2 answers:
IrinaVladis [17]3 years ago
4 0
When the substance is creating gases. Sometimes when it’s bubbling up
Lunna [17]3 years ago
3 0

When you are boiling eggs for example the pot with water is hot and you can see bubbles in the pot. This is called boiling water. When the eggs are in there they are boiling to make hard boiled eggs. Depending on how long it is in there determines the outcome. On the surface of the egg shell you may also notice little bubbles all around the shell which means it is boiling.

Hope this helps! :3

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What is the molarity of a solution with 2.1 mol of HCl in 400 mL of water? (M = mol/L)
natka813 [3]

Answer:

A

Explanation:

6 0
3 years ago
The pk of CH NH,+ equals 10.6; the pK_of (CH3)2NH,* equals 10.7. Which is the stronger base, CH NH, or (CH3)2NH²
FrozenT [24]

Explanation:

Relation between pK_{a} and pK_{b} is as follows.

                          pK_{a} + pK_{b} = 14

Hence, putting the given values of pK_{a} in order to calculate the value of pK_{b} as follows.

 For CH_{3}NH^{+}_{3} : pK_{a} + pK_{b} = 14

                       10.6 + pK_{b} = 14

                           pK_{b} = 14 - 10.6

                                         = 3.4

For (CH_{3})_{2}NH^{+}_{2} : pK_{a} + pK_{b} = 14

                           10.7 + pK_{b} = 14

                           pK_{b} = 14 - 10.7

                                         = 3.3

Hence, smaller is the value of pK_{b} of a specie more will be the value of its K_{b}. Therefore, stronger will be the base.

Thus, we can conclude that (CH_{3})_{2}NH^{+}_{2} will be the stronger base.

4 0
3 years ago
A solid is the only form of matter true or false
SVEN [57.7K]
False, there are five forms of matter; solid, liquid, glass, plasma, and <span>Bose-Einstein condensates.
hope this helps :)</span>
7 0
3 years ago
Read 2 more answers
A sealed helium balloon with an internal pressure of 1.00 atm and a volume of 4.50 L at 293 K is moved. What volume will the bal
bixtya [17]

Answer:

6.48 L

Explanation:

From the question,

Applying

PV/T = P'V'/T'......................... Equation 1

P = initial pressure of the helium balloon, V =  Initial volume of the balloon, T = Initial temperature of the balloon, P' = Final pressure of the balloon, T' = Final temperature of the balloon, V' = Final volume of the balloon.

make V' the subject of the equation

V' = PVT'/P'T......................... Equation 2

Given: P = 1 atm, V = 4.5 L, T' = 253 K, T= 293 K, P' = 0.6 atm

Substitute these values into equation 2

V' = (4.5×1×253)/(0.6×293)

V' = 1138.5/175.8

V' = 6.48 L

8 0
3 years ago
In the rock cycle, where is the energy being released?
Talja [164]

Answer:

the two major sources of energy for the rock cycle are also shown; the sun provides energy for surface processes such as weathering, erosion, and transport, and the Earth's internal heat provides energy for processes like subduction, melting, and metamorphism.

3 0
3 years ago
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