The minimum volume of 0.2M sodium sulfide that will precipitate out aluminum from 50.0 mL, 0.25 M aluminum nitrate would be 0.094 L or 94 mL
Stoichiometric calculationFrom the equation of the reaction:
[tex]2Al(NO_3)_3 + 3Na_2S ---> Al_2S_3 + 6NaNO_3[/tex]
Mole ratio of Na2S and Al(NO3)3 = 3:2
Mole of 50.0 mL, 0.25 M Al(NO3)3 = 50/1000 x 0.25
= 0.0125 mole
Equivalent mole of Na2S = 3/2 x 0.0125
= 0.0188 mole
Volume of 0.2M, 0.0188 mole Na2S = 0.0188/0.2
= 0.094 L or 94 mL
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Based on this information, do you think that the mole should be considered a base unit in the Sl system? Explain why or why not.
Answer:
I jus had this but i forgot srry!
Explanation:
2. Sodium Bicarbonate decomposes when heated to form sodium carbonate, water, and
carbon dioxide gas. If 1.8 moles of carbon dioxide are produced, how many moles of
sodium bicarbonate were decomposed?
Answer:
3.6 moles of sodium bicarbonate were decomposed.
Explanation:
The decomposition of sodium bicarbonate (NaHCO₃) to form sodium carbonate (Na₂CO₃), water, and carbon dioxide gas can be represented by the following balanced chemical equation:
[tex]\displaystyle 2\text{NaHCO$_3$}_\text{(s)} \longrightarrow \text{Na$_2$CO$_3$} + \text{H$_2$O}_\text{($\ell$)} + \text{CO$_2$}_{\text{(g)}}[/tex]
We want to determine the amount of sodium bicarbonate decomposed when 1.8 moles of carbon dioxde is produced.
From the equation, we can see that the mole ratio between carbon dioxide and sodium bicarbonate is 1:2. That is, there is one mole of carbon dioxide produced for every two moles of sodium bicarbonate.
Therefore:
[tex]\displaystyle 1.8\text{ mol CO$_2$} \cdot \frac{2\text{ mol NaHCO$_3$}}{1\text{ mol CO$_2$}} = 3.6\text{ NaHCO$_3$}[/tex]
In conclusion, 3.6 moles of sodium bicarbonate were decomposed.
Calculate the molality of chloride ions in an aqueous solution of magnesium chloride in which the mole fraction of magnesium chloride is 0.0400 .
The molality of chloride ions is 4.63kg/L
Data;
Mole Fraction = 0.0400Molality of Chloride ions = ?Molality of Chloride ionsMole Fraction of MgCl2 = 0.04
The sum of mole fraction = 1
Mole fraction of water = 1 - 0.04 = 0.96
since the total number of moles = 1
Number of moles of MgCl2 = mole fraction * total number of moles
Number of moles of MgCl2
[tex]0.04 * 1 = 0.04 moles[/tex]
Number of moles of water =
[tex]0.96 * 1 = 0.96 moles[/tex]
1 moles of MgCl2 = 2 moles of Chloride ions
Number of moles of chloride ions
[tex]2 * 0.04 = 0.08 moles[/tex]
Number of moles of water = 0.96moles
mass of water = molecular weight * number of moles
mass of water =
[tex]18 * 0.96 = 17.28g[/tex]
let's convert this to kilogram
[tex]1000g = 1kg\\17.28g = x\\x = 0.01728kg\\[/tex]
The molality of the ions in the solution is
[tex]M = \frac{mass of solute}{volume of solution} \\M = \frac{0.08}{0.01728} =4.63 kg/L[/tex]
The molality of chloride ions is 4.63kg/L
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I need help. A chemist wants to dilute 100.0 ml of 2.50 M Sulfuric acid to 0.50 M Sulfuric acid. To what volume must it be diluted?
Taking into account the definition of dilution, to a volume of 500 mL, a solution of 100.0 mL of 2.50 M Sulfuric acid must be diluted to 0.50 M Sulfuric acid.
DilutionWhen it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.
Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.
In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.
A dilution is mathematically expressed as:
Ci×Vi = Cf×Vf
where
Ci: initial concentrationVi: initial volumeCf: final concentrationVf: final volumeFinal volumeIn this case, you know:
Ci= 2.50 MVi= 100 mLCf= 0.50 MVf= ?Replacing in the definition of dilution:
2.50 M× 100 mL= 0.50 M× Vf
Solving:
(2.50 M× 100 mL)÷ 0.50 M= Vf
500 mL= Vf
In summary, to a volume of 500 mL, a solution of 100.0 mL of 2.50 M Sulfuric acid must be diluted to 0.50 M Sulfuric acid.
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Donna is drinking alcohol with her friend Allan. They have both consumed the same amount of alcohol so far. It is likely that Donna's blood alcohol concentration (BAC) will be about a. the same as Allen's. b. 10% lower than Allen's. c. 10% higher than Allen's.
It is likely that Donna's blood alcohol concentration (BAC) will be about
10% higher than Allen's.
What is Concentration?This is defined as the abundance of a constituent divided by the total
volume of a mixture.
During drinking, the concentration of alcohol is dependent on a lot of
factors such as the internal constituent of the body which is why Donna
will most likely have a higher alcohol concentration.
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the radio waves from your cell phone go through the air and are received by a ??
Answer:
An antenna
Explanation:
Radio waves are received by antennas
If you had a mixture of butyric acid and hexane, how would you separate the two compounds?.
Answer:
First of all take separatory funnel.
Add the mixture of compounds into it.
Pour Water into it.
Add NaOH base. This will result in following reaction.
CH₃CH₂CH₂COOH + NaOH → CH₃CH₂CH₂COONa + H₂O
The resulting salt (CH₃CH₂CH₂COONa) is is soluble in water.
The water is the bottom layer (more density) and contains sodium butyrate.
Pour out the water from separatory funnel.
The organic layer (hexane) is left behind.
Now, take the aquous layer and neutralize it using HCl.
Once, neutralized remove the water.
Which scientist researched and described the results of genetic crosses?
Question 1 options:
Alfred Wegner
Gregor Mendel
Marie Curie
Santa Clause
Gregor Mendel researched and described the results of genetic crosses. He is considered the father of genetics.
Who was Gregor Mendel?Gregor Mendel was a botanist who made different genetic crosses using pea plants as a model organism.
Gregor Mendel observed as phenotypic traits were transmitted to the pea descendence in the F1 and F2 generation.
Gregor Mendel developed fundamental laws in genetics such as independent assortment and segregation.
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Water contains hydrogen and oxygen. Hydrogen is an explosive gas, while oxygen is a flammable gas. Will the physical properties of water be similar? Why or why not?
Answer:
hope you like it
Explanation:
No, your refreshing glass of water won't spontaneously combust. Water is made up of two elements, hydrogen and oxygen. Hydrogen is flammable, but oxygen is not. ... You can, however, break it down into hydrogen and oxygen by putting energy into it, in the form of an electric current.
Hey yall any answers
Answer:
January = 45
May = 80
Explanation:
45 + 8 = 53
53 + 8 = 61
61 + 8 = 69 Round 70
70 + 8 = 78 Round 80
[RevyBreeze]
Answer: i might 45 and 110 because i think that it is adding or something
Explanation:
Where can you change the atom/molecules used in the simulation? Which atoms/molecules are
available for you to choose?
Answer:
When two or more atoms are chemically joined together, this is called a molecule. In some cases, such as hydrogen and oxygen, the molecule is made entirely of the same atom, such as hydrogen gas (a molecule) is made entirely of two hydrogen atoms. Here, converting molecules to atoms is as simple as dividing by two.
Atoms can join together - they form bonds together - to make MOLECULES. For example, two atoms of hydrogen hook together to form a molecule of hydrogen
How much H₂ is needed to react with 6.58 g of O₂ in this reaction?
H₂ + O₂ --> H₂O
When carbohydrates
are
digested by the body, what molecule do they become?
Answer:
Glucose
Explanation:
Both simple and complex carbohydrates break down into glucose (aka blood sugar). A simple carb is one that's comprised of one or two sugar molecules, while a complex carb contains three or more sugar molecules.
HOPE IT HELPS! BE SAFE :)
Answer:
Glucose
Explanation:
Both simple and complex carbohydrates break down into glucose.
10. The energy in a spinning ferris wheel
a. Potential energy
b. Kinetic energy
Answer:
kinetic energy is the right answer
Answer: the answer is B
Explanation: its a spinning Ferris wheel meaning its in motion
Why is lifting a box off the ground considered work but carrying a box is not ?
Answer:
In this case the gravitational force is conservative, but the force you exert is not. So, as you lift the box, the work done by non-conservative forces (you) is not zero, and as a result, the total energy of the box increases.
But, Lifting a box is not scientifically considered "work"
Explanation: You do no work against gravity because you are not moving any distance (more accurately displacement) in the direction of the force i.e. the force and displacement are perpendicular once you have lifted the boxes. As work done = force x displacement parallel to the force, no work is done.
Hope This Helps :)
How many calories are required to raise 50 g of water 100 degrees celsius?
Pls Help!!!!!
Answer:
energy known as the latent heat of vaporization is required to break the hydrogen bonds. At 100 °C, 540 calories per gram of water are needed to convert one gram of liquid water to one gram of water vapour under normal pressure.
Explanation:
it was easy
Ram's father have 3 childrens first is lina and second is pina who is third
Answer: Ram
Explanation:
Because as you mentioned in the beginning it is Ram's father
Trevor was able to collect what appeared to be blood and sweat from a kitchen counter. What type of evidence does this BEST represent
A. trace evidence
B. biological evidence
C. ammunitions evidence
D. impression evidence
Answer:
Biological Evidence
Explanation:
Both blood and sweat are fluids within the body, therefore, both are biological substances.
Tetrachloroethene, C2Cl4 is a solvent used in many dry cleaning processes. Write the empirical formula for tetrachloroethene.
Answer:
CCl2 is the empirical formula. (the lowest whole-number ratio of the elements)
Explanation:
Oxygen ENTERS the body through the...
1.The circulatory system
2.The Digestive system
3.The respiratory system
4. The cells in the body
Answer:
Respiratory System
Explanation:
It connects with the lungs. The oxygen enters the body through the capillaries which are a part of the respiratory system.
Hurry please!!!
Why is the production of genetically modified crops considered controversial?
AD
Genetically modified crops may have the same appearance as normal crops.
(В)
Genetically modified crops are less expensive to grow than normal crops.
©
Genetically modified crops may cause unforeseen health consequences.
D
Genetically modified crops can only be grown in warm climates.
HELP PLSS!!! I want a answer by the end of the day pls!!! Determine if the following statement is true or false and explain why: Heating a material will not destroy matter.(1 point)
True. Heating will always convert some matter into another substance, but the Law of Conservation of Mass states that matter may not be destroyed.
True. Heating will always convert some matter into another substance, but the Law of Conservation of Mass states that matter may not be destroyed.
False. Heating will always convert some matter into another substance, and this process results in matter being destroyed in order to form the new substance.
False. Heating will always convert some matter into another substance, and this process results in matter being destroyed in order to form the new substance.
True. Heating may convert some matter into another substance, but the Law of Conservation of Mass states that matter may not be destroyed.
True. Heating may convert some matter into another substance, but the Law of Conservation of Mass states that matter may not be destroyed.
False. Heating may convert some matter into another substance, and this process results in matter being destroyed in order to form the new substance.
Answer:
True. Heating may convert some matter into another substance, but the Law of Conservation of Mass states that matter may not be destroyed.
Explanation:
the answer is C
Carlos is making phosphorus trichloride using the equation below. He uses 15. 5 g of phosphorus and collects 50. 9 g of phosphorus chloride. 2P 3Cl2 2PCl3 How much chlorine reacted with the phosphorus? 15. 5 g 17. 7 g 35. 4 g 66. 4 g.
Answer:
B
Explanation:
Explain how can we apply the phase changes in our life?
Answer:
Examples of Phase Changes
For example, you have probably witnessed freezing, melting, and vaporization just by making ice, melting ice, and boiling water.
Explanation:
hope it will help you have a great day bye and Mark brainlist if the answer is correct
[tex]kai6417 \: [/tex]
#carry on learning
Explanation:
freezing occurs when are liquid changes to a solid.
melting occurs when a solid changes directly to a liquid
What is the ground-state electron configuration of a neutral atom of manganese?.
Explanation:
elctronic configuration of manganese
Mn=1s²2s²2p⁶3s²3p⁶4s²3d⁵
ground state
Mn=Ar3d⁵4s²
note that Ar is argon
Atoms with different numbers of neutrons in their nucleus are:.
Answer: They are referred to as isotopes, which are a form of an element that has different numbers of neutrons in their nucleus.
Sodium bicarbonate (baking soda), NaHCO,, can be purified by dissolving it in
hot water (60 °C), filtering to remove insoluble impurities, cooling to 0 °C to
precipitate solid Nalco, and then filtering to remove the solid, leaving
soluble impurities in solution. Any Nauco, that remains in solution is not?
recovered. The solubility of Nauco, in hot water of 60 °C is 164 g/L. Its
solubility in cold water of 0°C is 69 g/1. What is the percent yield of NaHCO,
when it is purified by this method?
Answer:
the other person is right
Explanation:
they're also wrong
Answer:
58% or 55.34%
Explanati
Water is added to liquid isopropanol (a polar liquid) to form a solution of rubbing alcohol. Describe what happens on the molecular level as the water dissolves in the isopropanol. Select the correct step order from the drop-down menu for each step listed. The polar isopropanol molecules are attracted to the polar water molecules at the surface of the water. The water molecules spread evenly throughout the solution. The water molecules are carried into the solution. The isopropanol molecules surround the water molecules.
Isopropanol molecules are attracted to water at the surface and surround them. The water gets carried in and gets spread evenly in the solution.
What is the mechanism of water dissolution?A solution is formed when the water and the isopropanol get mixed and dissolved. Isopropanol is a polar solute that dissolves the water molecule in it to form a solution.
The polar molecules of the isopropanol get attracted towards the polar water molecules and start surrounding the water molecules.
The water molecules get carried in the isopropanol in the solution and get evenly dispersed in the solution.
Therefore, water and isopropanol form the solution.
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Answer:
The polar isopropanol molecules are attracted to the polar water molecules at the surface of the water.
✔ 1
The water molecules spread evenly throughout the solution.
✔ 4
The water molecules are carried into the solution.
✔ 3
The isopropanol molecules surround the water molecules.
✔ 2
Explanation:
The polar isopropanol molecules are attracted to the polar water molecules at the surface of the water.
✔ 1
The water molecules spread evenly throughout the solution.
✔ 4
The water molecules are carried into the solution.
✔ 3
The isopropanol molecules surround the water molecules.
✔ 2
what is the product after the chemical reaction
Answer: a. 2 C3H7OH + 9 O2 → 6 CO2(g) + 8 H2O(g)
b. C6H12O6 + 6 O2 → 6CO2(g) + 6 H2O(g)
Explanation:
Alcohols and sugars combust or when burned with oxygen forms carbon dioxide and water.
Which statement is correct about the theory of combustion? (1 point)
A. The law of conservation of mass provided justification for the theory of combustion.
B. The theory of phlogiston provided justification for the theory of combustion.
C. The theory of phlogiston became the theory of combustion.
D.The law of conservation of mass became the theory of combustion.
The theory of phlogiston was the first to explain combustion process. J.J Becher was proposed this theory and states the existence of phlogisticated substances contain phlogiston and that they dephlogisticate when burned.
What is combustion ?Combustion is the reaction of gases with atmospheric oxygen producing carbon dioxide and water. Gases like hydrocarbons easily undergoes combustion reaction.
Combustion is an exothermic reaction. Thus, heat is evolved to the surrounding. The conservation of mass is not only for combustion but it is the theory of every reaction.
The phlogiston idea, a debunked scientific hypothesis, suggested that combustible bodies contained a fire-like substance called phlogiston, which was produced after combustion.
Johann Joachim Becher originally put out the concept in 1667, and Georg Ernst Stahl later formalized it. The Phlogiston theory sought to explain a variety of chemical reactions, including burning and rusting Hence, option C is correct.
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