Answer: 0.16 M
Explanation:
molarity is a way to measure the concentration of solutions, the equation is the amount of solute in mol / liter of solution:
mol (solute) / L (solution)
the first thing you want to do is convert grams to moles:
20g NaF • 1 mol
———— = 0.47632464 mol
41.98817 g (molar mass of NaF)
then you just want to follow with the rest of the equation:
0.47632464 mol NaF / 3.0 L = 0.15877488 or 0.16 M (sigfigs)
hope this helps :)
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.
Select all the correct answers. Which sentences describe an advantage of using a hydrogen fuel cell instead of burning fossil fuels?
Advantages:-
Fossil fuels like methane(Natural gas) on combustion releases carbon dioxide which is a major air pollutant.On the other hand hydrogen fuels don't do pollution much or in negligible amount.So hydrogen fuels are better
Answer:
The reaction of hydrogen and oxygen conveniently takes place inside a fuel cell.
Someday, it may be possible to produce hydrogen fuel using sunlight and water.
The reaction of hydrogen and oxygen doesn’t create products that negatively affect the environment.
Explanation:
PLATO
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.
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
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
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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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
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
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
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:
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.
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.
A cheese puff contains 15 g of carbohydrate. If carbohydrates have a caloric value of 4 kcal/g, how many kcal are obtained from the carbohydrate in the cheese puff?
Will Mark Brainliest
Help Plss!!
hope it helps
cheese puff contains 15 g of carbohydrates
caloric value of carbohydrates=4kcal/g
1kcal=1000cal
4kcal/g= 4000cal/15g
ans. 266.6
kcal= 0.267 kcal.
Explain the importance of organisms that convert nitrogen from its diatomic form into other compounds?
Explanation:
Bacteria play a key role in the nitrogen cycle.
Nitrogen-fixing microorganisms capture atmospheric nitrogen by converting it to ammonia— NH3start text, N, H, end text, start subscript, 3, end subscript—which can be taken up by plants and used to make organic molecules.
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
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
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.
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
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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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:
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.
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.
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:
Consider the reaction below. HClO3 NH3 Right arrow. NH4 ClO3– Which is a base-conjugate acid pair? NH3 and ClO3– NH3 and NH4 HClO3 and NH3 HClO3 and NH4.
Bronsted-Lowry acid-base theory states about the donation or the acceptance of the protons by the chemical species. [tex]\rm NH_{3}[/tex] and [tex]\rm NH_{4}^{+}[/tex] are the base/conjugate acid pair.
What are the acid and base pairs of the lowry theory?According to this theory, the bases are the proton [tex](\rm H^{+})[/tex] acceptors and acids are proton contributors, the reaction between the species of the acids and bases results in the proton transfer.
An acid that donates or loses the proton to form an ion or molecule forms a conjugate base while the base that accepts proton are called conjugate acids. It can be shown as,
[tex]\rm acid + base \rightleftarrows conjugate\; base + conjugate \;acid[/tex]
In the reaction of [tex]\rm HClO_{3}[/tex] and [tex]\rm NH_{3}[/tex] the chloric acid acts like acid and donates proton while ammonia acts as a base because it accepts the proton.
Therefore, option B. [tex]\rm NH_{4}^{+}[/tex] is the conjugate acid of the ammonia and[tex]\rm ClO_{3}^{-}[/tex] is the conjugate base of chloric acid.
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Answer:
B.) NH3 and NH4+
Explanation:
"What can I say except your welcome" -Maui, 2016
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:
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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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.
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.
How much H₂ is needed to react with 6.58 g of O₂ in this reaction?
H₂ + O₂ --> H₂O
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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