Assuming an ebullioscopic constant of 0.512 °C/m for the water, If you add 30.0g of salt to 3.75kg of water, the boiling-point elevation will be 0.140 °C and the boiling-point of the solution will be 100.14 °C.
What is the boiling-point elevation?Boiling-point elevation describes the phenomenon that the boiling point of a liquid will be higher when another compound is added, meaning that a solution has a higher boiling point than a pure solvent.
Step 1: Calculate the molality of the solution.We will use the definition of molality.
b = mass solute / molar mass solute × kg solvent
b = 30.0 g / (58.44 g/mol) × 3.75 kg = 0.137 m
Step 2: Calculate the boiling-point elevation.We will use the following expression.
ΔT = Kb × m × i
ΔT = 0.512 °C/m × 0.137 m × 2 = 0.140 °C
where
ΔT is the boiling-point elevationKb is the ebullioscopic constant.b is the molality.i is the Van't Hoff factor (i = 2 for NaCl).The normal boiling-point for water is 100 °C. The boiling-point of the solution will be:
100 °C + 0.140 °C = 100.14 °C
Assuming an ebullioscopic constant of 0.512 °C/m for the water, If you add 30.0g of salt to 3.75kg of water, the boiling-point elevation will be 0.140 °C and the boiling-point of the solution will be 100.14 °C.
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What is the ph of the solution formed by mixing 25. 0 ml of a 0. 15 m solution of nh3 with 25. 0 ml of 0. 12 m hcl? (kb for nh3 = 1. 8 10–5 )
Answer:
Explanation:
the answer is 8.66
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The pH of the solution formed by mixing 25. 0 ml of a 0. 15 m solution of NH₃ with 25. 0 ml of 0. 12 m HCl is 8.66.
What is pH?pH is potential hydrogen. It is the measurement of the acidity and basicity of any solution.
The solution of NH₃ is 25. 0 ml of a 0. 15 m
The solution of HCl is 25. 0 ml of 0. 12 m hcl
The pkb value is [tex]1.8 \times 10^-^5[/tex]
Putting the value in the formula
[tex]pOH=pKb +log[NH_3][HCl]\\\\ pOH = 1.8 \times 10^-^5+ log \dfrac{25.0 \times 0.15}{ 25.0 \times 0.12} \\\\ pOH = 1.8\times10^-^5+ log1.25 \\\\pOH = 1.8\times 10^-^5 + 1.25 = 3.05\\\\ pH = 14 - pOH = 14 - 1.25 = 8.66[/tex]
Thus, the pH of the solution formed by mixing 25. 0 ml of a 0. 15 m solution of NH₃ with 25. 0 ml of 0. 12 m HCl is 8.66.
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What’s an example of a single displacement reaction in everyday life
Answer:
Any time a simple metal reacts with an acid it is a single displacement reaction.
Explanation:
how many inches are there in 62.8 cm?
Answer:
24.7
Explanation:
Answer: ~24.72in
Explanation:
1 inch = 2.54 centimeters
divide 62.8cm by 2.54 which gives us approximately 24.72in.
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Balance the chemical equation
Balanced equation: 2 HI --> I2 + H2
Explanation:
HI-
H = 1 x 2 = 2
I = 1 x 2 = 2
H2-
H = 2
I = 2
what do you get when you mix H2O And Co3987b2
Answer:Potassium metal reacts very rapidly with water to form a colourless solution of potassium hydroxide (KOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is exothermic.
Explanation:
650.0 mL of a gas is under a pressure of 840.0 torr. What would the volume of
the gas be at a pressure of 1150.0 torr?
Answer:
Explanation:using the ideal gas formula, calculate the volume of 1.5omoles of a gas at 115kPA and a temperature of 298k?
How does acid react to water mixed with clorine eyedrops
Answer: Chlorine gas is produced when sulfuric acid is mixed with chlorine bleach.
Explanation: This reaction is a function of the change in pH of the solution from alkaline to acidic combined with the strong oxidant properties of hypochlorous acid.
Make sure to reword this in your words!!!Consider the reaction 2NaN3 → 2Na + 3N2, which is the first reaction that occurs when an air bag expands in a car undergoing a collision. This reaction happens very quickly, as you might suspect.
A graph showing the amount of nitrogen gas (N2) could be best described as which sentence?
A.) The graph line’s general trend is decreasing from left to right.
B.) The graph line’s general trend is absolutely horizontal.
C.) The graph line’s general trend is nearly horizontal.
D.) The graph line’s general trend is increasing from left to right.
Answer:
D) The Graph line’s general trend is increasing from left to right.
Explanation:
N2, a product, will increase over time which means the line of the graph would go up over time. Time increases from left to right so the correct answer is D.
The graph that describes the reaction will have a trend in which the graph is decreasing from left to right.
What is a collision?A collision occurs when two particle bump into each other. We know that a reaction takes place when there is an effective collision between the reacting particles.
In this case, the graph that describes the reaction will have a trend in which the graph is decreasing from left to right.
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Which images show chemical reactions?
Explanation:
image 3 and 4show chemical reactionsAnswer:
image 3 and 4show chemical reactions
Explanation:
what causes the outer layer of star to expand?
Answer/Explanation:
Stars spend the majority of their lifespan medling hydrogen nuclei together to form helium. When the hydrogen that in the core of the star begins to run out, the star will start using hydrogen away from its core and this is what causes the star's outer layer to expand and slowly cool down.
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-No one
How can solar flares affect the oceans?
Explanation:
it can damage satellites cuase there in space and are not protected by earth
A sample of nitrogen occupies 10.0 liters at 25oC , what would be the new volume at 20oC?
Apply Charles law
[tex]\\ \bf\bull\rightarrowtail V1T2=V_2T1[/tex]
[tex]\\ \bf\bull\rightarrowtail 10(20)=25V_2[/tex]
[tex]\\ \bf\bull\rightarrowtail 200=25V_2[/tex]
[tex]\\ \bf\bull\rightarrowtail V_2=8L[/tex]
Answer:
hope it's helpful to you
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According to Robert Boyle, which of the following is not an acid’s property?
a) turns blue Litmus red
b) sour in taste
c) neutralize bases
d) bitter in taste
Answer:
Bitter in taste
Explanation:
Acids according to Robert Boyle taste sour not bitter.
They are corrosiveThey can act as neutralize basesAccording to Robert Boyle, the option which is not an acid’s property include the following: d) bitter in taste.
What is an acidic solution?In Chemistry, an acidic solution can be defined as a type of aqueous solution that has a high concentration of hydrogen ions (H⁺), which is typically greater than that of pure water.
According to Robert Boyle, the properties of acids include the following:
They turn a blue Litmus paper red.
They are corrosive
They can act as neutralize bases.
They are sour in taste
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Can someone please predict the products for these two? Also explain to me how you predicted it, thank you.
1) C₂H₂ + O₂ -->
2) C₂H₁₂ + O₂ -->
Why does knowing types of mixtures help you to identify a substance?
Answer:
This is my own explanation:
Explanation:
It is important to know the mixtures you input together because you may determine the type of substance you produced from different elements and several combinations of matter. This assists in identifying your specific substance.
I have 5 questions that need help to answer 1) What are covalent bonds and how do they form ? 2) How do you know which elements and how many of each are in a compound ?
3) How can you find how many valence electrons an atom has ?
4) How many valence electrons do atoms need to be happy? Which elements are the exceptions?
Answer:
covalent bond- a chemical bond that is the sharing of electron pairs between atoms
As consumption of a synthetic material increases, the associated negative impacts to Earth required to produce the material increase.
Is this a true or false question? If so, then this would be a true statement. Synthetic materials are made in factories, and the usage of factories increases the risks of harmful gases and chemicals that negatively impacts Earth.
It is generally true that as consumption of a synthetic material increases, the associated negative impacts to Earth needed to produce the material also increase.
Why the given sentence is true?This is because the production of synthetic materials often requires the extraction and processing of non-renewable resources, such as petroleum, which can have a range of negative environmental impacts, including habitat destruction, air and water pollution, and greenhouse gas emissions.
Additionally, the disposal of synthetic materials can also lead to environmental problems, such as the accumulation of non-biodegradable waste in landfills and oceans.
However, it is important to note that not all synthetic materials have the same environmental impacts, and some materials may be more sustainable than others depending on their production methods and intended use. Hence, the given sentence is true.
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Your question is incomplete, most probably the full question is this:
True or false. As consumption of a synthetic material increases, the associated negative impacts to Earth required to produce the material increase.
How many grams of bicarbonate will produce 40. Ml of co2 gas?
The reaction equation must first be put down and the stiochiometry is used to calculate the mass of the bicarbonate produced as 0.11 g.
What is a reaction?A reaction refers to the transformation of reactants into products. We have the equation of this reaction as;
CO2 + H2O ---->H2CO3
If 1 mole of CO2 gas occupies 22400mL
x moles of CO2 occupies 40 mL
x = 0.0018 moles
If 1 mole of CO2 yields 1 mole of bicarbonate
0.0018 moles yields 0.0018 moles of bicarbonate
Mass of bicarbonate = 0.0018 moles * 61 g/mol = 0.11 g
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_______ oxides are oxides of certain non metals
acidic in naturenature
Generally, Oxides of non-metals are acidic in nature. When non-metals are reacted with water it forms an acidic solution. The common oxides of Sulphur, Selenium, and Bromine are strongly acidic.
ILL BRAINLIST ITS URGENTTT!!!!
Investigate the rate of success that CCS projects have shown and predict it’s viability as a method of reducing carbon emissions to achieve our target of zero emissions by 2050.
Answer:
With the European Climate Law, the EU committing to carbon neutrality by 2050. What does that mean in practice?
Climate change is already affecting the entire world, with extreme weather conditions such as drought, heat waves, heavy rain, floods and landslides becoming more frequent, including in Europe. Other consequences of the rapidly changing climate include rising sea levels, ocean acidification and loss of biodiversity.
In order to limit global warming to 1.5 degrees Celsius – a threshold the Intergovernmental Panel for Climate Change (IPCC) suggests is safe – carbon neutrality by mid-21st century is essential. This target is also laid down in the Paris agreement signed by 195 countries, including the EU.
In December 2019, the European Commission presented the European Green Deal, its flagship plan that aims to make Europe climate neutral by 2050. This target will be reached through the European Climate Law that sets climate neutrality into binding EU legislation.
Explanation:
ok bet i got u
The sum of the kinetic energies and potential energies of all of the molecules
in a substance is called the ___ energy of the substance.
Answer:
The sum of the kinetic energies and potential energies of all of the molecules in a substance is called the thermal energy of the substance.
hello, I need help with this question
Answer:
carnivores organism get their energy from eating other organisms..
Complete and balance the equation for the reaction of sodium with water.
Na+_H2O+ H2
2Na + 2H2O → 2NaOH + H2
The balanced equation
Help ASAP!!! I need it now i have to write similar test tmrw
Answer and explanation:
(c)
A represents the activation energy (the minimum amount of energy needed to start a reaction).
B represents the overall change in energy (the difference between the energy of the reactants and products).
(d)
The reaction profile diagram shows that the reaction is exothermic because the energy change is negative (the products have less energy than the reactants) which shows that energy is lost or given out to the surroundings.
(e)
HCl gas doesn't conduct electricity, but hydrochloric acid does because in HCl, there are hydrogen ions that are free to move so they can carry a charge.
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Why might a company decide against using hydroelectric energy as an alternative energy resource?
Because gathering it leaves a negative impact on natural habitats.
Calculate the molarity of each of the following solutions. Use the periodic table if necessary. A salt solution with a volume of 250 mL that contains 0. 70 mol NaCl. M.
The molarity of the NaCl in the 250 ml slat solution is 2.8M.
What is molarity?
The molarity of a solution is defined as the concentration of a solute per unit volume of the solution.
Given, the volume of the solution is 250 ml converted into l 0.25
The number of moles of NaCl is 0.70.
By the formula of molarity
[tex]M = \dfrac{n}{V}\\\\\\M = \dfrac{0.70}{0.25} = 2.8 M[/tex]
Thus, the molarity is 2.8 M.
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What term describes a solution in which the dissolved solute is in equilibrium with the undissolved solute?
Saturated solution refer to a solution in which the dissolved solute is in equilibrium with the undissolved solute.
What is a saturated solution?A saturated solution is a chemical solution that contain maximum amount of a solute which is dissolved in the solvent. The addition of anotheg solute will not dissolve in a saturated solution. The amount of solute that can be dissolved in a solvent to form a saturated solution depends on a variety of factors.
Therefore, Saturated solution refer to a solution in which the dissolved solute is in equilibrium with the undissolved solute
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The term that describes a solution in which the dissolved solute is in equilibrium with the undissolved solute is saturated solution.
What is a saturated solution?A saturated solution is one in which there is so much solute that it would not dissolve if there was anymore.
When a saturated solution comes into contact with more solute, the extra solute does not dissolve or deposit.
Thus, the term that describes a solution in which the dissolved solute is in equilibrium with the undissolved solute is saturated solution.
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The antibiotic prontosil, developed by bayer pharmaceuticals in 1932, was used in saving the life of president roosevelt's son from severe strep throat in 1936. protonsil consists of two nitrogens bonded together in a double bond. the left nitrogen is bonded to a benzene ring where the para position contains a sulfur double bonded to two oxygen atoms and single bonded to n h 2. the right nitrogen is bonded to a benzene ring where one ortho and the para position each have an n h 2 substituent. substituent prontosil is an azo dye, which can be prepared from an aryldiazonium ion and an aromatic compound. draw the structures of the diazonium ion and the coupling component for this drug
Prontosil is a compound produced by the coupled reaction of an aryldiazonium ion and an aromatic compound.
What are diazonium compounds?
These are organic compounds in which there are ionic interactions between the azo group (-N₂⁺) and an anion X⁻.
The general structure is RN₂⁺X⁻.
R is the lateral chain that might be an aromatic ring, among other options.N₂⁺ is the azo groupX⁻ is the anionThe azo group characterizes as being unstable and reactive. This property is because one of the N atoms has a positive charge.
-N⁺≡ N
What is the coupling reaction of aryldiazonium compounds?Aryldiazonium salt reactions can occur in two ways,
Substitution reactionsCoupling reactionsCoupling reactions are the aromatic electrophilic substitution, where the aryldiazonium ion acts as an electrophile for an activated aromatic compound to attack it.
The coupling reaction occurs at the azo group level.
In the exposed example,
the benzene ring with sulfur bonded to oxygen atoms is the coupling componentthe benzene ring with NH₂ and the azo group is the diazonium ionIn the attached files you will find the drawings.
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Write a full note on Infectious diseases. please I need it now and no links please thanks
Answer:
diseases where microbes are the immediate cause are called infectious diseases. Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful.
What impact will sea level rise have on farming and water supply?
I
Even a small increase can have devastating effects on coastal habitats farther inland, it can cause destructive erosion, wetland flooding, aquifer and agricultural soil contamination with salt, and lost habitat for fish, birds, and plants.
Explanation:
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