To accomplish a satisfactory separation, a slow, even distillation is required since only under these circumstances can vapor and liquid in the distillation apparatus be in balance with one another.
What justifies using a slow fractional distillation process? What would occur if it was completed too soon?The best equilibration and heat transport can essentially be achieved through slow, steady distillation. If you heat the mixture too quickly, the vapors could not condense as quickly as you'd want, wasting some of the column. Packaging supplies are also essential. Packing materials with a large surface area give surfaces on which condensation can happen.
How does too-rapid distillation affect the process?Additionally, bumping may happen if the distillation proceeds too quickly. -The target liquid's vapors condense too soon and fall back into column.
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What volume, in liters, of 0.500 M HNO3 is necessary to react with 25.0 mL of 0.0500 M Ca(OH)2 solution to the endpoint? HNO3 + Ca(OH)2. --> Ca(NO3)2 + H2O
Answer:
0.00500L are necessaries
Explanation:
Based on the balanced chemical reaction:
2HNO3 + Ca(OH)2. --> Ca(NO3)2 + 2H2O
2 moles of nitric acid react with 1 mole of calcium hydroxide
To solve this question we must find the moles of Ca(OH)2. Then, convert this moles to moles of HNO3 using the chemical reaction and to liters:
Moles Ca(OH)2:
0.025L * (0.0500mol / L) = 0.00125 moles Ca(OH)2
Moles HNO3:
0.00125 moles Ca(OH)2 * (2 moles HNO3 / 1mol Ca(OH)2) = 0.0025 moles HNO3
Liters HNO3:
0.0025 moles HNO3 * (1L / 0.500moles) = 0.00500L are necessaries
How much energy is used to heat 250 g of ice from –15°C to steam at 105°C? (Hint: 5 steps, all positive)
Answer:
Explanation: Q1 = mc(ice) ΔT (ice warms)
Q2 = ms (ice melts)
Q3 = mc((water) ΔT (water warms)
Q4 = mr (water boils)
Q5 = mc(vapour)ΔT
A material in which electrons are able to move easily or freely is a(n)
A none of these
В electric field
C insulator
D conductor
Answer:b
Explanation:
If a sample of oxygen gas has a pressure of 810 torr at 298 K, what will be its
pressure if its temperature is raised to 330K?
Answer:
The pressure is = 897 torr
Explanation:
does the mercury not have fixed shape and volume at 20 degree
Answer:
Mercury doesn't have a fixed shape
How do i describe endothermic and exothermic changes in matter?
Which statement describes sunspots? A.Sunspots have a bright white appearance. B.Sunspots occur in the radiative zone of the sun. C.Sunspots occur in areas of extremely low magnetic fields. D.Sunspots have lower temperatures than their surroundings.
Answer:
The statements that describe sunspots is;
D. Sunspots have lower temperatures than their surroundings
Explanation:
Sunspots is a phenomenon that involves temporary appearance of dark areas on the Sun's surface, which are regions of concentrated magnetic field flux which inhibit heat transfer by convection and are therefore cooler than other parts of the Sun. Due to the presence of magnetic field magnetic
Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection. Opposite magnetic polarity sunspots usually appear as a pair.
Therefore, the statement that best describe sunspots is that a sunspot is a region of reduced temperature compared to surrounding areas on the Sun's surface.
state ay three ways of increasing solubility
Can somebody help me pls pls pls pls pls
Answer:
1.5e + 24 I think, hope this can help
7. Given the balanced equation:
As a sample of I2(s) sublimes to I2(g), the entropy of the sample
Magnetic poles are called domains.
True
False
Answer:
false
Explanation:
the magnetic domains in the area around a magnet where the force acts.
what happens when a species is moved from its natural environment?
Answer:
What may happen is everything where they used to live may change. Like The food cycle or the ecosystem. Here's a example. We took wolves from their natural environment and there was a big impact on what they did. Elks is what they ate all the time and kept their population low enough to where the environment can thrive but when they took the wolves the elks started to eat the berries in which Grizzly Bears need to feast on for their hibernation and they ate shrubs and other plant like stuff to which stuff couldn't grow anymore. The Elk population when from 5000 to 30000 from when they took the wolves that day. Another thing is how beavers build dams to keep water from going to certain places which help humans out too, but all the time the Elks would drink water and leave waste inside the water to where fish and other species inside the water started dying out. So beavers couldn't build. So this is my example of what may happen if a species is moved from their natural ground cause they could also ruin a food chain somewhere else.
Explanation:
Hope this helps
4. Calculate the heat energy needed to heat 25.0 g of water from 13.0°C to 18.0°C. Use chart above for specific heat of water. Use units and show all work.
Answer: I go search some information
Explanation:I come back with a answer
please help me out with this question! don’t attach any files
Answer:
b
Explanation:
which star is mostly like Earth's sun? A)Blue Giant B) Red Giant C) Main sequence D) White Dwarf?
Answer:
C) main sequence
Explanation:
Currently, the Sun is a main sequence star. In roughly 5 billion years from now, the Sun will transition into a red giant.
What does pollution mainly come from
Answer:
Pollution comes from factories, careless humans, chemicals, non-biodegradable trash.
Explanation:
During
the
school
year,
1.3
x
102
students
participate
in
football,
and
.5
x
102
participate
in
soccer.
What
is
the
total
number
of
students
that
participate
in
football
in what order were the sun and earth created according to both the younger theory and the older theory
answer: the earth orbits around the sun for 365 while getting older to the young theory.
Answer:
The older theory was that the sun (and other planets) revolved around earth and the new theory is that the earth (and other planets) revolved around the sun.
Explanation:
Examine the structure of glucose and galactose which oh group determines that they both are the d isomers
Answer:
See Explanation
Explanation:
Stereoisomers are isomers that have the same atom to atom connectivity but differ in the arrangement of atoms or groups in space.
Glucose and galactose are stereoisomers that have more than one stereogenic center but differ in the configuration of atoms and groups about one of the stereogenic centers. This kind of stereoisomers are also called epimers.
Glucose and galactose differ in the orientation of -H and -OH at carbon-4.
If you have 12 atoms of hydrogen before a chemical reaction, how many atoms of hydrogen will be present after the chemical reaction?
Answer:
it is 12
Explanation:
because matter can put be created or destroyed
TRUE or FALSE: Traits that an organism has can be influenced by factors in the environment.
Answer:
True
Explanation:
Hope this helps
why is pluto classified as a dwarf planet?
Answer:
pluto is considered a dwarf planet because it did not meet the three criteria the IAU uses to define a full sized planet
Explanation:
H2CO: → H2O + CO2
Answer the following question about the equation above.
1. How many atoms of Hydrogen are in the reactant?
2. How many atoms of Carbon are in the reactant?
3. How many atoms of Oxygen are in the reactant?
4. How many atoms of Hydrogen are in the product?
5. How many atoms of Oxygen are in the product?
6. How many atoms of Carbon are in the product?
7. Does the number of atoms of each element on the reactant side match that of the product side?
Answer:
1) 2
2) 1
3)1
4) 2
5)3
6)1
7)yes except Oxygen
What is the mass of an object with a net force of 10 N accelerating at 2 m/s^2??
Answer:
5kg
Explanation:
Force = Mass x acceleration
F = ma
m = F/a = 10N/2m/s^2
m = 10/2 = 5kg
The standard unit for mass = Kilogram
Overflow during a heavy rainstorm from a wastewater treatment plant would result in
A. polluted runoff into nearby ponds.
B. flooding in the local aquifer.
C. weakened housing foundations.
D. over-treated drinking water.
Answer: a.polluted runoff into nearby ponds
Explanation:
Answer:
Aa
Explanation:
Balance the following chemical equation:
C2H60+02 → CO2 + H2O
Answer: C2h6O + 3O2 → 2CO2 + 3H2O
Explanation:
what element has 5 protons, 7 electrons, and 6 neutrons
Answer: Boron
Explanation: lol
Answer:
Boron. (What kind of name is that?????????????)
Explanation:
Calculate the answer. Express it in scientific notation. All answers should have the correct number of significant figures.
(1.632) (4.0 x 104) =
(1.632) (4.0 x 104)
= (1.632)(416)
=678.912
6.8* 10^2.
Not sure if it's the right sig figs.
Answer:
417.632 (i dont know if u need to round or somehting but this is what i think is right)
Explanation:
4.0 x 104 = 416
(1.632) (416) = 417.632
Based on this diagram, which type of stars would belong to spectral class M and have the
highest luminosity?
Answer:J , the answer is super giants
in an electroplating apparatus, where does the oxidation reaction occur?
a. on the surface of the battery
b. on the surface of the cathode
c. in the solution
d. on the surface of the anode
Answer:
I believe it’s on the surface of the anode!
Explanation:
Electroplating apparatuses are the devices used in the electroplating of metals. The oxidation reaction occurs on the anode of the plate. Thus, option d is correct.
What is oxidation?Oxidation is the process of the redox reaction in which the atoms or the ions lose their electron to the positive anode. The negative of the ionic species gets attracted to the positive of the anode.
The negative ions act as charges deposited on the positively charged anode and conduct electric current. The oxidation of the species will always occur at the anode of the electrochemical cell.
Therefore, option d. oxidation occurs at the surface of the anode.
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