How can we separate a homogeneous mixture?
Methods:
evaporation
distillation
chromatography
Explanation:
There are three common methods to separate a homogeneous mixture, which are evaporation, distillation, chromatography.
Lets look more deeper into the best method:
Evaporation is typically considered to be the best method where we heat the mixture until no more liquid remains. The salts will be visible and left out, separated.
A mixture contains 5.00 g each of O2, N2, CO2, and Ne gas. Calculate the volume of
this mixture at STP
The volume of this mixture at STP is mathematically given as
v=15.59L
What is the volume of this mixture at STP?Question Parameters:
A mixture contains 5.00 g
Generally, the equation for the number of moles is mathematically given as
n=mass/molar mass
For O2
nO=5/32
nO=0.156mol
For N2
nN=5/28.02
nN=0.178
For CO2
nCO2=0.114mol
For Ne
nNe=0.248
In conclusion, total moles present
nT=0.156mol+0.178+0.114mol+0.248
nT=0.696
Hence, volume at stp
V=0.696*22.4
v=15.59L
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What is the mass number of an isotope that has two neutrons
Answer:
mass number = 3
Explanation:
Hydrogen is the only chemical species that has an isotope with 2 neutrons. Since all hydrogen atoms only have 1 proton, the mass number of hydrogen isotope with 2 nuetrons would be 3. The mass number is equal to number of protons + neutrons (+ electrons but they have virtually no mass so they can be excluded).
C₂H60
Which is the correct empirical formula
What is the limiting reactant if 12 moles of p4 react with 15 moles of o2?.
Answer:
see explanation
Explanation:
To determine limiting reactant divide mole quantities of reactants by the respective coefficient in the balanced equation. The smaller value is the limiting reactant.
P₄ + 5O₂ => 2P₂O₅
12/1 = 12 15/5 = 3
O₂ is the limiting reactant. P₄ will be in excess when rxn stops.
elements on the far right of the periodic table are classified as:
Answer:
Noble gases
Explanation:
^^
Answer:
noble gases
Explanation:
brainliest, 5 stars & a thanks pls
Please help me with number 4 and 5 on my study guide
Answer:
help with problem 4
Explanation:
4. protons are equal to atomic numbers. neutrons are atomic mass minus atomic number. electrons are equal to protons.
5. I don't know, sorry.
What type of reaction is this: 2CaO - 2Ca + O2
Answer:
White or gray, odorless lumps or granular powder.
How many moles of aluminum are equivalent to 4.816x10^24 atoms?
Please help ASAPPPPP
Guys i need your advice i got D+ in chemistry should i tell my parents?
Answer:
yes
Explanation:
its the correct thing to do
What is the chemical formula for the most common fragment of formic acid?.
How do I convert 35 degrees Celsius into Fahrenheit?.
Answer:
Multiply the temperature in degrees Celsius by 2, and then add 30 to get the estimated bro.
Explanation:
Type the correct answer in the box. Calculate the molar mass of aluminum oxide (Al2O3). Express your answer to four significant figures. The molar mass of Al2O3 is grams.
Molar mass can be given as the mass of each constitutive element in the formula unit. The molar mass of aluminum oxide is 101.957 grams.
What is a formula unit?Formula unit can be defined as the one unit of the molecular formula of the compound. It describes the number of atoms of each element present in the compound.
The formula unit for Aluminum oxide is [tex]\rm Al_2O_3[/tex]. The molar mass has been the sum of the mass of aluminum and oxygen.
The molar mass of aluminum oxide has been given as:
[tex]\rm Molar\;mass=2\;\times\;Al+3\;\times\;O\\Molar\;mass=2\;\times\;26.98\;+\;3\;\times\;15.99\;grams\\Molar\;mass=101.957\;grams[/tex]
The molar mass of aluminum oxide is 101.957 grams.
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If water is added to 50 ml of a 0. 04 M solution so that it fills a 200 ml beaker, what is the final concentration? M.
Where do convection currents form?
A. In areas where the land surface is mostly flat
B. Between areas with differing amounts of cloud cover
C. In areas where the temperature does not vary
D. Between areas with differing air densities
Answer:
I think it's C
Convection currents are identified in Earth's mantle. Heated mantle material is shown rising from deep inside the mantle, while cooler mantle material sinks, creating a convection current. It is thought that this type of current is responsible for the movements of the plates of Earth's crust.
Which of these is an example of the conversion of elastic potential energy into kinetic energy?
Answer:
a rubber band
Explanation:
how many grams of oxygen are in 180 g of water
Answer:
The balanced equation tells you 1 mole of oxygen gives you 2 moles of water, so you will get 10 moles of water, which is 180 g. 5 moles oxygen *(2-mole water / 1-mole oxygen) * 18 g / mol water = 180 g water.
balance this eqaution:
Answer:
H₂ + CuO → Cu + H₂O
Explanation:
We want to balance the given equation;
H₂ + CuO → Cu(OH)₂ + H₂O
To balance this we have to make sure the number of each element on the left is equal to the number of each element on the right.
Thus, the correct balanced equation is;
H₂ + CuO → Cu + H₂O
As astronomers have learned more about the structure of the sun, they have found that it
As astronomers have learned more about the structure of the sun, they have found that sun has six layers.
Structure of sun
The structure of the sun consist of six layers. The corona, chromosphere, and photosphere are the three layers present in the outer layer of the sun whereas the other three layers i.e. convective zone, radiative zone, and core, comprise the inner layers.
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how the nervous system organs are interrelated (with the body as a whole)
The brain sends messages traveling the spinal cord to peripheral nerves through the body that serve to control the muscles and central organs. The relation to the body and large as differently recognized from the mind nervous system is made of specialized cells transmitting nerve impulses; a nerve cell. The Central nervous system with the parts of the body that interact within the outside world.
consider the two setups below. in setup 1, conducting bodies A and B have the same temperature, while in setup 2, conducting bodies C and D have different temperatures-C is hotter than D.All the bodies are made of the same material.
a. will heat transfer occur in both setups?why?
b. in the setup(s) where heat transfer can occur, draw an arrow in the diagram(s) to represent the direction of heat flow between the two bodies.
c. will heat perpetually flow between the two bodies in each setup?why?
The heat transfer will only occur in setup 2 and heat will only flow from C to D.
Heat energy
In a mixture between two substances of different temperatures, there is heat transfer, in which the one with a lower temperature receives this heat and the one with a higher temperature loses the heat.
In a system, the value of heat lost and received is equal.
So, heat will only flow in setup 2 since it is the only one that has two bodies with different temperatures, and it will flow from C to D because C has a higher temperature.
The representation of heat transfer can be done as follows:
C ⇒ D
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A fecal transplant can work to cure a patient infected with a very harmful bacteria, such as C. difficile, in many
different ways
Subclaim 1: Bacteria from the fecal transplant can fill up the space in the gut, limiting the food and space for
invading harmful bacteria.
Revise your paragraph that supports the subclaim above. Include evidence and explain how your evidence supports
this subclaim.
Answer:
I believe it is subclaim 1. If you think it through enough, it starts to make sense, that's how I got the answer. Have a nice day, God bless.
Which of these are examples of negative tropism? (Select all that apply.)
a plant’s roots growing down into the soil due to gravitropism
a plant’s stem growing upward out of the ground due to gravitropism
a plant’s leaves growing toward the direction of the sun due to phototropism
a plant’s roots growing toward a water source due to hydrotropism
a plant’s leaves growing away from the sunlight due to phototropism
a plant’s roots growing away from a water source due to hydrotropism
Answer:a plant’s stem growing upward out of the ground due to gravitropism
a plant’s leaves growing away from the sunlight due to phototropism
a plant’s roots growing away from a water source due to hydrotropism
Explanation:
Answer keeps getting marked wrong! need some guidance..
what is the mass in grams of 8000. mL of alcohol is the density of 0.79 g/mL? Use sig figs please
Answer:
Explanation:
The volume of ethanol is V =8000 ml
The density if the ethanol is ρ=0.79g/mL
density = mass/volume which can be rewritten as
mass = density x volume
Using given volume and density, the mass of ethanol is computed
mass = (8000 mL) x (0.79 g/mL)
mass = 6320 g
Thus, the mass of ethanol is 6320 grams.
In one or two sentences, describe what would happen to the frequency of this wave if the wavelength is increased to 10m but the speed stays the same at 600 m/s
When the wavelength increases, wave frequency decreases so if the if the wavelength is increased to 10m then the frequency will be decrease at the same rate.
Relationship of wavelength and frequencyFrequency and wavelength have inverse relationship to each other. The wave with the greatest frequency has the shortest wavelength. If the frequency increases twice it means one-half the wavelength so we can conclude that if the wavelength is increased to 10m then the frequency will be decrease at the same rate.
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Constellations pls they are easy but not many photos are the same pls thank you
Answer:
What I would do is search about Constellations and the name of them. And where they are located.
Explanation:
hope this helps
Some hypothetical alloy is composed of 12. 5 wt% of metal a and 87. 5 wt% of metal b. If the densities of metals a and b are 4. 27 and 6. 35 g/cm3, respectively, whereas their respective atomic weights are 61. 4 and 125. 7 g/mol, determine whether the crystal structure for this alloy is simple cubic, face-centered cubic, or body-centered cubic. Assume a unit cell edge length of 0. 395 nm.
Answer:
The number of
atoms in the unit cell is 2
Explanation:
5.00 g of solid silver nitrate AgNO3 is added to 100ml of deionized H2O to make a substance that can test the presence of chlorine in water. Identify in the word problem each of the following: (1pt each).
What is the solvent?
What is the solute?
What is the solution?
The solvent will be the deionized water, the solute will be the AgNO3, and the solution is the substance that can test the presence of chlorine water.
Solvent, solute, and solutionA solvent is a liquid that can dissolve other substances
A solute is a solid capable of dissolving in relevant solvents
A solution is a mixture of solvent and dissolved solutes
In this case, the solvent that is capable of dissolving the solute is deionized water. The solute is the silver nitrate, while the solution would be a solution of silver nitrate.
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How many moles of nitrogen are needed to inflate a 58 L airbag? How much sodium azide is needed to decompose this amount of nitrogen. I will give brainliest.
Answer:
A handful (130 grams) of sodium azide will produce 67 liters of nitrogen gas--which is enough to inflate a normal air bag. 0.03 SECOND is all it takes to inflate an air bag.
Based on the balanced equation reactants to product ratio are 2:3 for Azide: Nitrogen gas. This means for every 3 moles of Nitrogen gas produces, 2 moles of Sodium Azide are needed
Explanation:
