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katrin2010 [14]
4 years ago
13

What year did mendeleev organized his periodic table in order of increasing atomic number

Chemistry
1 answer:
ELEN [110]4 years ago
6 0

Mendeleev organized his periodic table in order of increasing atomic number in 1869.

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Which type of bonding is found in all molecular substances?
Dmitrij [34]
The answer is covalent bonding. Molecular compounds are made of 2 or more nonmetals, and are therefore covalent. That is why another name for "molecular compound" is "covalent compound".
Answer: (1) covalent bonding

Hope this helped!! :D

4 0
3 years ago
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A solution is made by dissolving 0.656 mol of nonelectrolyte solute in 869 g of benzene. calculate the freezing point, tf, and b
solmaris [256]
Answer is: the freezing point is 1.63°C and boiling point is 82.01°C.<span>.

1) n(</span><span>nonelectrolyte solute) = 0.656 mol.
</span>m(C₆H₆ - benzene) = 869 g ÷ 1000 g/kg.
m(C₆H₆) = 0.869 kg.<span>
b(solution) = n(</span>nonelectrolyte solute) ÷ m(C₆H₆).<span>
b(solution) = 0.656 mol ÷ 0.869 kg.
b(solution) = 0.754 mol/kg.

2) ΔT = Kf(benzene) · b(solution).
ΔT = 5.12°C/m · 0.754 m.
ΔT = 3.865°C.
Tf = 5.50°C - 3.865°C.
Tf = 1.63°C.
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3) ΔTb = Kb(benzene) · b(solution).
ΔTb = 2.53°C/m · 0.754 m.
ΔTb = 1.91°C.
Tb = 80.1°C + 1.91°C.
Tb = 82.01°C.<span>

</span>
4 0
3 years ago
Identify the number of significant figures in each measurement.
Zepler [3.9K]
0.052301= 6 sig. figure
400 cm. = 3 significant figures
50.0. =. 3. Significant figure
4500.01=. 6 significant figure
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3 years ago
After mixing sand with water, after awhile it settles to the bottom. WHY?
BigorU [14]

Answer:

Because the water is filled up with the sand every where

Explanation:

So the exess sand goes to the bottem

4 0
4 years ago
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An atom with 5 protons, 6 neutrons, and 5 electrons has an atomic mass of amu.
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Answer:

Explanation: 11

7 0
3 years ago
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