How many grams are in 4.5 moles of Li2O?
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Based on the equation below, which of the following statements best describes what should be observed as the reaction takes place?Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g) Select one or more: a. Chlorine forming a solid precipitate b. Bubbles forming from hydrogen gas production c. Solid zinc dissolving d. Bubbles forming from chlorine gas production
shininess and ductility
conductivity, malleability, and shininess
ductility, conductivity, and malleability
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Answer: malleability and ductility
Explanation:-
Malleability is the property of metals to be beaten into sheets. Ductility is the property of metals to be drawn into wires.The delocalized sea of electrons enable the metal atoms to roll over each other when stress is applied and thus they can be converted to sheets or wires.
Shininess of metals is because electrons on the surface can bounce back light at the same frequency as the light hits the surface.
When a wire is connected to a metal, the delocalized electrons are drawn to the positive pole and thus helps in the conduction of electricity.
The metallic properties that are caused by atoms rolling over each other in metallic bonds are malleability and ductility.the atoms that are being rolled over are delocalized electrons in the sea of electrons in the metallic bond enable them to roll over when stress is applied.
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Answer:
At very low temperatures, gases expand less for a given pressure change than they do at high temperatures
The question's incomplete unfortunately, which observations?
b. atomic mass.
c. molecular size.
d. molecular mass.
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b. Zero
c. No right choice.
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a. Negative
Explanation:
We have to look at its oxidation (burning, explosion) of TNT:
4 C₇H₅N₃O₆ + 21 O₂ → 28 CO₂ + 10 H₂O + 6 N₂ + heat
So trinitrotoluene need more oxygen atoms that is have to be fully oxidized so the oxygen balance will be negative.
An empirical formula with which you calculate the oxygen balance percent (OB %) is:
OB % = (-1600 / molecular wight) × [2X + (Y/2) + M - Z)
were
X = number of carbon atoms
Y = number of hydrogen atoms
M = number of metal atoms
Z = number of oxygen atoms
For TNT:
OB % = (-1600 / 227.13) × [2×7 + (5/2) + 0 - 6)
OB % = -73.97 %
So the oxygen balance percent is negative.
Learn more about:
oxidation of TNT
#learnwithBrainly
872.4 mm =
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Answer:
Explanation:
The answer is in three significant figures because that is the least number of significant figures in any of the numbers involved in the calculation
(6.32 x 10-4) ÷ 12.64
5.00 x 10^-5
1 m
1.000 mm
= 0.025 mm
1.000 mm
O 25.000 mm; because 25 m x = 25,000 mm
1 m
25.000 mm; because 25 m X
100 mm
= 2500 mm
1 m
O 0.025 mm; because 25 m x
1 m
100 mm
= 0.25 mm
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Answer:
25000 mm: because 25 m × 1000 mm /1 m = 25000 mm
Explanation:
We can convert 25 m to millimetre (mm) by doing the following:
Recall:
1 m = 1000 mm
Therefore,
25 m = 25 m × 1000 mm /1 m = 25000 mm
25 m = 25000 mm
Thus, 25 m is equivalent to 25000 mm