Answer:
Kr has one more electron than br and so, the nuclear charge increase, which means the nuclear attraction between the nucleus and outer most electron will increase and so will be harder to remove the electron from Kr than Br, so Kr has higher 1st ionisation.
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Answer:
the pressure exerted in pascals is 0.5 Pa
Explanation:
The computation of the pressure exerted in pascals is shown below:
As we know that
Pressure = force ÷ area
= 25 ÷ 50
= 0.5 Pa
Hence, the pressure exerted in pascals is 0.5 Pa
We simply applied the above formula so that the correct pressure could come
Answer:
Propane and butane are pure substances, which means that each one of them is made of only one type of molecule—propane molecules or butane molecules. In contrast, gasoline, diesel, and kerosene are not pure substances; they are mixtures of more than one substance.
Explanation:
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Answer:
1) adding ice
2) adding heat
3) altering amount of water
4) using a different kind of cocoa mix
Explanation:
Dissolution of a substance in another can be affected by temperature changes, concentration and the type of mix we are using.
The higher the temperature, the more readily a compound will dissolve in another. The rate of dissolution of a solute in a solvent is affected by prevailing temperature at hand.
The more the water which is the solvent, the more the solute that can be dissolved in it. Reaction rate is directly proportional to concentration.
A different cocoa mix might dissolve better in this case also.
They differ in number of electrons because ions lose or gain electrons
