Answer is valence electron, they all have total of 2 valence electron.
remember group number = valence electron
The pipette that accurately measures 0.8mL of fluid is P1000 micropipette.
It is given that:-
The volume of fluid = 0.8mL
We know that,
1 mL = 1000 microliter.
Hence,
0.8 mL = 0.8*1000 microliter = 800 microliter
We know that, a P1000 micropipette's volume ranges between 200 microliter to 1000 micro liter.
As,
200 < 800 < 100
Hence, P1000 micropipette is the right instrument.
The accuracy of this pipette decreases as volume decreases. Since the value 800 is near the maximum volume 1000 of the pipette, the accuracy of the pipette will be within a few percentages of the actual value.
To learn more about pipette, here:-
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I think it goes like this.
mass = 78.6 g
molar mass = 60.1 g/mol
amount (in mols) = mass/mol
78.6 g / 60.1 g/mol = 1.30782 mol
^^rounded to 3 sig figs, final answer = 1.31mol
Answer: so the answer would likely be
Explanation:
Answer:
- <u><em>You should expect that the ionic bond in LiBr is stronger than the bond in KBr.</em></u>
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Explanation:
The<em> ionic bonds</em> are formed by the electrostatic attraction between the ions, cations and anions.
In KBr the cation is K⁺ and the anion is Br⁻.
In LiBr the cation is Li⁺ and the anion is Br⁻.
You must expect that the bond strength depends mainly on the charges present on each ion and the distance between them.
Nevertheless, the effect of the distance between the radius dominate the trendency of the bond strength, which makes that the ionic strength trend be related to the ionic radius trend.
Lithium is a smaller ion than Potassium (both are in the same group and Lithium is above Potassium).
Thus, you should expect that the Li ion is closer to the Br ion than what the K ion is to the Br ion and expect that the bond between a Li ion and the Br ion be stronger than the bond between the K ion and the Br ion.
