The consideration element is the correct answer.
The exchange of the value is called consideration. The exchange of money is known as value for anything such as services/property, exchange of property, or services.
There are many types of considerations that are given below:
a promise.an act other than a promise,forbearance,money, a small change in a legal connection between the parties,other property.The four important elements of a contract are given below:
Offer & Acceptance,Consideration,Legal Capacity,Legality.If any of the given elements is missing then the contract is voided, and the parties released from the agreement.
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What type of response to chemical exposure is an immediate or rapid harmful reaction?.
An acute effect is an immediate or rapid harmful reaction to a exposure.
A chronic effect is a permanent/ long-lasting consequence from exposure to a single dose or to repeated lower doses of a harmful substance.
What is an acute effect?
Acute (short-term) effects show up immediately or soon after exposure to the chemical. They may be minor, like nose or throat irritation, or they could be serious, like eye damage or passing out from chemical vapors. It is an adverse effect on a human or animal body, with severe symptoms developing rapidly and coming quickly to a crisis.
What is a acute effect example?
Examples of acute health effects include dizziness, skin irritation, and throat irritation. Keep in mind that a chemical may cause both acute and chronic effects.
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Write a balanced overall reaction from these unbalanced half-reactions. sn⟶sn2 ag ⟶ag
The balanced overall reaction from these unbalanced half-reactions is given in following steps ,
Step 1 : [tex]Sn[/tex] → [tex]Sn^{+2}+ 2e^{-}[/tex]
Step 2 : [tex]Ag^{+}[/tex] + [tex]e^{-}[/tex] → [tex]Ag[/tex]
[tex]2Ag^{+} + 2e^{-}[/tex] → [tex]2Ag[/tex]
Overall reaction : [tex]Sn[/tex] + [tex]2Ag^{+}[/tex] → [tex]Sn^{+2}[/tex] + [tex]2Ag[/tex]
The equation in which number of atoms of elements in reactant side is equal to the number of atoms of elements in product side is called balanced chemical equation .
This step is oxidation half-reaction in which loss of electron is takes place .
Second steps is reduction reaction in which fain of electrons is takes place. We multiple second half-reaction by two to make equal number of electrons in both steps to cancel out the electrons from the equation.
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Chemical reactions can be detected by: _________
a) color change from reactants to products
b) the production of a precipitate
c) a change in temperature
d) an increase of surface area
(A) Color changes from reactant to products.
The rate of a chemical reaction is calculated by dividing the rate of change in a reactant or product's concentration by the coefficient from the equation's balanced state.
2N2O5(g) → 4NO2(G) + O2(g)
A change in color and the appearance of bubbles are two indications of a chemical shift.In a chemical process, the makeup of the components changes; in a physical change, the appearance, smell, or straightforward exhibition of a sample of matter changes without changing its composition.
Despite the fact that we refer to them as physical "reactions," nothing is actually changing. A change in the substance in question's elemental composition is necessary for a reaction to occur. Therefore, from now on, we will simply refer to bodily "reactions" as physical changes.
Physical modifications must only cause a variation in display without altering the composition. Typical modifications include, but are not limited to:
Texture\Color\Temperature\Shape
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3. 4 g of a nonelectrolyte dissolved in 78. 3 g of water produces a solution that freezes at −4. 5∘c. what is the molar mass of this solute? kf=1. 86∘cm?
3. 4 g of a nonelectrolyte dissolved in 78. 3 g of water produces a solution. The molar mass of the solute will be 17.94.
What is molar mass?
Molar mass of a substance is its mass in grams in per mole of a solution.
Freezing point: Freezing point of a substance is a temperature at which a liquid starts to solidify.
Depression in the freezing point can be calculated
[Depression in freezing point of pure solvent—Freezing point of solution] =[(0) - (-4.5)] °C =4.5 °C
molar mass = Number of moles of solute m / Mass of solvent in Kg
3.4g / M x 1/ 0.0783 kg = 43.42
Substitute AT by 4.5°C , Kr by 1.86 °C/m, and m by 43.42 m in equation (1) as follows:
1.86 x 43.42 / 4.5 = 17.94
Therefore, molar mass of solute to be 17.94.
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O.25 moles of SO₂ will contain
A.2.5055*10^23
B.1.5055*10^23
C.3.5055*10^23
D.4.5055*10^23
Explanation:
number of mole s of H
2
= 0.25 moles
number of molecules = moles * Avogadro’s Number
number of molecules = 0.25×(6.022×10
23
)
number of molecules = 1.505×10
23
single molecule of hydrogen contains two H-atoms. So,
number of atoms = 2×(1.505×10
23
) = 3.01×10
23
What is observed when magnesium is reacted with hydrochloric acid? choose all that apply
It is observed that when magnesium reacts with hydrochloric acid, it produces visible bubbles of hydrogen gas.
A vigorous reaction will occur giving rise of heat as it is an exothermic reaction. If heat is applied then it should be more vigorous.
Reaction is as follows:
Mg(s) + HCl (aq) --> MgCl2 (aq) + H2(g)
Magnesium reacts easily with HCl to produce H2 gas and magnesium ions, Mg2+, and heat. The reaction is exothermic, so it heats up quickly.
Mg(s) + HCl (aq) --> MgCl2(aq) + H2(g)
The net ionic equation :
Mg(s) + 2H+ --> Mg2 + H2(g)
If water is removed from the solution then white crystals of Mgcl2 is obtained.
Or in simple words,
2Mg + 2HCl -> 2Mg+ + 2Cl- + H2(gas)
The magnesium is attacked by the hydrochloric acid resulting in the magnesium dissolving into the solution resulting in a solution of magnesium chloride in hydrochloric acid and the production of hydrogen gas.
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For the energy diagram of the chemical reaction depicted here, which statement is the best conclusion?
The reaction is endothermic.
The reaction is endothermic.
The reaction will proceed without the input of energy.
The reaction will proceed without the input of energy.
The reaction is exothermic.
The reaction is exothermic.
The activation energy is not represented on the graph.
The reaction shown here is an exothermic reaction.
What is an exothermic reaction?An exothermic reaction is one in which the energy of the reactants is greater than the energy of the products. This implies that energy is given out in the process. Whether a reaction is endothermic or exothermic shows in the nature of the reaction profile curve.
For an endothermic reaction, the part of the diagram that represents the energy of the products is higher than the part that represents the energy of the reactants. This is clear from the image attached here.
If we look at the reaction graph very well, we will observe that the energy of the reactants is far above that of the products. Thus it follows that the reaction shown here is an exothermic reaction.
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What type of bond is joining the two hydrogen atoms?
a. two hydrogen atoms sharing a pair of electrons.
b. covalent hydrogen hydrophobic ionic hydrophilic
Covalent hydrogen bond is joining the two hydrogen atoms.
The simplest material with a covalent hydrogen bond is the hydrogen molecule. Two hydrogen atoms, each with one electron in a 1s orbital, combine to produce it. The two electrons in the covalent link are shared by both hydrogen atoms, and each one takes on an electron configuration like that of helium.The hydrogen atom's single electron shell, which contains space for two electrons, is where the electrons are located. The same nature of the hydrogen atoms prevents either from stealing an electron from the other in order to complete its own electron shell and create an ionic bond. The two electrons are thus shared by the two hydrogen atoms in a covalent link.learn more about Covalent hydrogen bond here: https://brainly.com/question/20607646
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1.50 moles of N2 at 825 mmhg and 303 K are contained in a 34.3 L bottle. What is the pressure of the system if an additional 1.00 mole of gas is added to the bottle and the temperature is reduced to 273 K?
Answer:
1240 mmHg
Explanation:
Since volume is being held constant, we can use the following variation of the Ideal Gas Law to find the new pressure.
[tex]\frac{P_1}{T_1N_1}=\frac{P_2}{T_2N_2}[/tex]
In the equation, "P₁", "T₁", and "N₁" represent the initial pressure, temperature, and moles. "P₂", "T₂", and "N₂" represent the final pressure, temperature, and moles. Your answer should have 3 sig figs to match the sig figs of the given values.
P₁ = 825 mmHg P₂ = ? mmHg
T₁ = 303 K T₂ = 273 K
N₁ = 1.50 moles N₂ = 1.50 + 1.00 = 2.50 moles
[tex]\frac{P_1}{T_1N_1}=\frac{P_2}{T_2N_2}[/tex] <----- Formula
[tex]\frac{825 mmHg}{(303K)(1.50 moles)}=\frac{P_2}{(273 K)(2.50 moles)}[/tex] <----- Insert values
[tex]\frac{825 mmHg}{454.5}=\frac{P_2}{682.5}[/tex] <----- Simplify denominators
[tex]1.815=\frac{P_2}{682.5}[/tex] <----- Simplify left side
[tex]1238.86 mmHg={P_2}[/tex] <----- Multiply both sides by 682.5
[tex]1240 mmHg={P_2}[/tex] <----- Apply sig figs
Answer:1240
Explanation:
The decomposition of an insecticide in water at 12 °C follows first-order kinetics with a rate constant of 1.45 yr¹. A drum of this insecticide leaks into a lake, resulting in a concentration of 419 nM. What will be the insecticide concentration in the lake in 3.9 years? Enter your answer in nanomoles (nM), to two significant figures.
The concentration in the next 3.9 years is obtained as 1.5 nM.
What is first order kinetics?We know from first order kinetics that the relationship between the concentration and the time is exponential and leads to a straight line graph of the equation;
ln[A] = ln[A]o - kt
[A] = ?
[A]o = 419 nM
k = 1.45 yr¹
t = 3.9 years
ln[A] = ln(419) - (1.45 * 3.9)
[A] = e^ ln(419) - (1.45 * 3.9)
[A] = e^6.04 - 5.655
[A] = 1.5 nM
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How many moles of argon are in 13.9 g of argon?
Answer:
0.348 moles Ar
Explanation:
You can determine the moles of argon (Ar) by multiplying the given mass by the atomic mass of argon. This number gives the mass in grams per 1 mole. It is important to arrange the conversion in a way that allows for the cancellation of units. The final answer should have 3 significant figures to match the sig figs of the given value (13.9 = 3 sig figs).
Atomic Mass (Ar): 39.948 g/mol
13.9 g Ar 1 mole
----------------- x ------------------ = 0.348 moles Ar
39.948 g
13. Which compound reacts third fastest with fuming sulfuric acid? a. Toluene b. Chlorobenzene d. Nitrobenzene e. Benzene c. Aniline.
Toluene compound reacts third fastest with fuming sulfuric acid.
The reaction is attached in figure -
When nitration of toluene is carried out in presence of fuming nitric acid and fuming sulfuric acid under 333 K temperature , 2, 4, 6-trinitro toluene is the final product .This 2, 4, 6-trinitro toluene is also called TNT. TNT is used as explosive.What is toluene?
Toluene is a common ingredient in degreasers. It's a colorless liquid with a sweet smell and taste. It evaporates quickly. Toluene is found naturally in crude oil, and is used in oil refining and the manufacturing of paints, lacquers, explosives (TNT) and glues.What is a toluene used for?
Toluene is found naturally in crude oil, and is used in oil refining and the manufacturing of paints, lacquers, explosives (TNT) and glues. In homes, toluene may be found in paint thinners, paintbrush cleaners, nail polish, glues, inks and stain removers.Learn more about Toluene
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Which of the following pairs of elements can combine to form an ionic compound?
A hydrogen and carbon
B aluminium and magnesium
C silicon and chlorine
D magnesium and sulphur
Answer:
D.) magnesium and sulphur
Explanation:
Generally, ionic bonds form between a metal and a nonmetal.
Generally, covalent bonds form between two nonmetals.
Generally, metallic bonds form between two metals.
Nonmetals are located on the right side of the periodic table (apart from the noble gases in the final column). Hydrogen is also a nonmetal. Metals are every other element in the periodic table.
A.) Hydrogen (nonmetal) and carbon (nonmetal) = covalent
B.) Aluminum (metal) and magnesium (metal) = metallic
C.) Silicon (nonmetal) and chlorine (nonmetal) = covalent
D.) Magnesium (metal) and sulphur (nonmetal) = ionic
A solution is 0. 0480 m lif. What is the molarity of the solution if the density is 1. 10 g/ml?.
The molarity of the solution is 0.528 mol/l.
What is molarity?
The molarity of any solution is the number of moles per liter of the solution.
Given,
The molality of the solution is 0.0480 m Lif
The density of the solution is 1.10 g/ml
Step 1: 0.0480 moles of LiF were present in 1 kg solvent.
Mass of 0.0480 moles of LiF = 0.0480 mol × 26 g/mol = 1.248 g
Mass of the solution (m)= 1 kg (solvent) + 1.248 g(solute)
m = 1000 g + 1.248 g = 1001.248 g
Step 2: Find the volume of the solution
Step 3: Calculating the molarity
Thus, the molarity of the solution is 0.528 mol/l.
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When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is also formed?
When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced, the new isotope will be C-6.
In research, the physicist James Chadwick attacked Beryllium using alpha particles produced by the nuclear reactions of polonium naturally. High radiation penetration through some kind of lead shield was seen, which the then-current particle theories were unable to account for.
There was indeed the production of a carbon-12 nucleus as well as the production of a neutron whenever one blasted beryllium with alpha particles.
The reaction of alpha decay can be written as:
[tex]Be^{9} _{4} + He^{4} _{2}[/tex] → [tex]C^{12} _{6} + n^{1} _{0}[/tex]
Therefore, when atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced, the new isotope will be C-6.
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Why do you not need to perform the titration while the sample is at its original temperature?
We do not perform the titration while the sample is at its original temperature because reaction is too slow at original temperature and requires high activation energy.
A titration is a method where the concentration of an unknown solution is ascertained by comparing it to a solution of known concentration. The analyte (the unknown solution) is typically added in a known amount to the titrant (the known solution) from a buret until the reaction is finished.
The slow energy step in the reaction process may require a high activation energy, and the proportion of activated molecules needed to reach this reaction at room temperature or original temperature is too low, so most molecules cannot cross this peak. As a result, the reaction at room temperature proceeds very slowly (the final product is not reached). Heat can enhance the proportion of active molecules and catalyse a larger-scale reaction.
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1.07 option 1 -- laboratory techniques lab report anybody got this lab filled out for me?
For this reason, chromatographic methods such as liquid, gas, or high-performance liquid chromatography are typically used in laboratories, with spectroscopic methods such as UV-visible spectroscopy, NMR, or MS being used for detection.
What purpose do laboratory methods serve?The use of laboratory methods is crucial to a researcher's career. These abilities are essential for carrying out various studies and examinations. One cannot use these strategies in projects or research without the necessary understanding. The majority of experiments require these procedures.
An lab report is what?A lab report describes an experiment and any findings that were made as a result of the experiment. The three major goals of a lab report are to: clearly explain the results of an experiment by giving data. talk about the outcomes.
What is the name of a lab report?Experimental reports, commonly referred to as "lab reports," are summaries of the writers' own empirical study. An experimental report should be viewed as a "narrative" of your research that guides the reader through your experiment.
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One d orbital can
hold ___ electrons.
A. 2
B. 6
C. 10
D. 14
[tex]{ \red{ \tt{option \: (c)}}}[/tex]
Explanation:
One d orbital can hold 10 electrons.
The maximum number of electrons which can be hold by one d orbital is 10 electrons. It can hold less than 10 electrons in it's orbit but not more than 10 electrons. It's impossible to hold and never possible to hold more than 10 electrons in d orbital.
A sugar crystal contains approximately 1. 9×1017 sucrose (c12h22o11c12h22o11) molecules. part a what is its mass in mgmg ? express your ans
Sucrose is a disaccharide, which is a sugar molecule formed from two monosaccharides. In this case, the two monosaccharides are fructose and glucose.
Answer and Explanation:
The number of molecules a" role="presentation" style="display: inline-block; line-height: 0; text-indent: 0px; text-align: left; text-transform: none; font-style: normal; font-weight: 400; font-size: 16.66px; letter-spacing: normal; overflow-wrap: normal; word-spacing: 0px; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; color: rgb(0, 0, 0); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; position: relative;">aa is related to a quantity of moles n" role="presentation" style="display: inline-block; line-height: 0; text-indent: 0px; text-align: left; text-transform: none; font-style: normal; font-weight: 400; font-size: 16.66px; letter-spacing: normal; overflow-wrap: normal; word-spacing: 0px; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; margin: 0px; padding: 1px 0px; color: rgb(0, 0, 0); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; position: relative;">nn of any substance by Avogadro's number {eq}N_A = \rm 6.022\times...
Write a balanced chemical equation for the standard formation reaction of liquid acetic acid hch3co2.
The balanced chemical equation for the standard formation reaction of liquid acetic acid is given as ,
[tex]2C(gr) +2H_{2} (g) +O_{2} (g)[/tex] → [tex]CH_{3} COOH(l)[/tex]
The reaction that form the products from their elements in their standard state is called formation of reaction .The acetic acid consist C , H , and O , So, determine their standard state . Carbon is graphite at 25°C and 1 atm , whereas hydrogen and oxygen are diatomic gases . Hence , we start with unbalanced reaction.
[tex]C(gr) +H_{2} (g) +O_{2} (g)[/tex] → [tex]CH_{3} COOH(l)[/tex]
The balanced chemical equation for the standard formation reaction of liquid acetic acid as,
[tex]2C(gr) +2H_{2} (g) +O_{2} (g)[/tex] → [tex]CH_{3} COOH(l)[/tex]
The combustion of liquid acetic acid is given as,
[tex]CH_{3} COOH(l) + 2O(g)[/tex] → [tex]2CO_{2}((g) +2H_{2} O(l)[/tex] ΔH =-873
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Type the correct answer in each box. which chemical symbols will complete the equation for this single displacement reaction? 2nabr cl2 → 2 2
Chemical symbols that will complete the equation are 2NaCl + Br2
The balanced Chemical reaction is -
[tex]2NaBr[/tex] + [tex]Cl_{2}[/tex] → [tex]2NaCl[/tex] + [tex]Br_{2}[/tex]
Chlorine ([tex]Cl_{2}[/tex]) is more reactive than bromine([tex]Br_{2}[/tex]). So, chlorine displaces bromine from its compound.
What is a Single Displacement Reaction?A single displacement reaction is type of reaction in which element react with compound and take place of other element in that compound.There are three primary sorts of single not set in stone by the reactivity series: Metal Replacement: where metal will dislodge another metal. Hydrogen Replacement: where hydrogen gas is created through relocation by a metal. Halogen Replacement: when a halogen takes part in relocation.Mostly the more reactive element displaces the less reactive elements from its compound.To learn more about single displacement reaction from the given link
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How much would the boiling point of water increase if mol of NaCl added 1 kg of water (Kb= 0.51 degrees Celsius /(mol/kg) for water i=2 for NaCl
The boiling point of water would increase by 1°C if 1 mol of NaCl added 1 kg of water.
What would be the change in the boiling point of water when NaCl is added to it?The addition of solute substances to solvent such as water results in a change in the boiling points and freezing points of the solvents.
The formula to calculate the change in temperature is given below:
ΔT = Kbmi
Where;
m is molality of the solution
Kb and i are constants.
Solving for change in temperature:
m = 1 mol/kg
ΔT = 0.51 * 1 * 2
ΔT = 1°C
The normal boiling point of water is 100°C
The new boiling point of the solution = (100 + 1) = 101 °C
In conclusion, addition of solute to solvent will result in change in the boiling point of the solvent.
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Why isn't the ph at the equivalence point always equal to 7 in a neutralization titration?
The pH at the equivalence point always not equal to 7 in a neutralization titration when titration occur between weak acid and weak base , strong acid and weak base or strong base weak acid. The reason behind it is given as,
At equivalence point the product is present by reacting from acid and base. So, when weak acid titrate with strong base then the solution will be weak base at equivalence point.When strong acid is neutralize with strong base then it form neutral product at the equivalence point. Hence the final conclusion is that the pH of the solution in which titration is takes place between strong acid and strong base is 7 that is neutral left titration between all type of acids and bases ha pH not equal to 7 .
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What molarity should the stock solution be if you want to dilute 25. 0 ml to 2. 00 l and have the final concentration be 0. 103 m?
The stock solution should have a molarity of 8.24M.
Proportional sets. C₁V₁=C₂V₂ is used to calculate an unknown quantity where two solutions/mixtures are proportional.
It follows that the initial concentration times the initial volume will equal the final concentration times the final volume because the sum does not vary.
Using the formula as follows;
C₁V₁ = C₂V₂
Where;
C₁ = initial concentration of the stock solution
C₂ = final concentration of the stock solution
V₁ = initial volume of the stock solution
V₂ = final volume of the stock solution
According to the information given in this question,
V₁ = 25mL = 25/1000 = 0.025L
V₂ = 2L
C₁ =?
C₂ = 0.103M
Using the formula; C₁V₁ = C₂V₂
C₁ = C₂V₂/V₁
C₁ = (0.103 × 2) / 0.025
C₁ = 0.206 / 0.025
C₁ = 8.24 M
Therefore, the stock solution should have a molarity of 8.24M.
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Sodium hydrogen carbonate were disolved in 10cm cubed of water in a boiling tube . Lemon juice was then added dropwise with shaking until there was no further observable change. Explain the observation which was made in the boiling tube when the reaction was in progress.
The observation is the evolution of carbon dioxide gas.
Acid-base reactionSodium hydrogen carbonate is a base while lemon juice contains an acid known as citric acid.
Thus, the reaction in the illustration is involving an acid and a base.
Sodium hydrogen carbonate goes by the formula: NaHCO₃
Citric acid goes by the formula: C₆H₈O₇
The reaction between the two goes thus:
[tex]3 NaHCO_3 + C_6H_8O_7 --- > 3 H_2O + 3 CO_2 + Na_3C_6H_5O_7[/tex]
The carbon dioxide gas is evolved from the reaction vessel in the form of bubbles.
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A gas bottle contains 8. 61×1023 oxygen molecules at a temperature of 359. 0 k. what is the thermal energy of the gas? (you might need to know boltzmann's constant: kb = 1. 38×10-23 j/k. )
A gas bottle contains 8. 61×1023 oxygen molecules at a temperature of 359. 0 k then the thermal energy of the gas is 6.35KJ.
What is thermal energy?Thermal energy is the energy contained within a system which is responsible for its temperature. Heat is also termed as flow of thermal energy.
Thermal energy is directly proportional to the temperature. As temperature increase thermal energy increases.
Given,
temperature = 395K
Number of oxygen molecules= 8.61 × 10^(23)
Firstly we will calculate the number of moles = N/A
where A is the avagadro number = 6.022 × 10^(23)
number of moles = 8.61 × 10^(23)/6.022 ×10^(23)
number of moles = 1.42moles
Using the energy equation,
E = 3/2 × nRT
where R is the gas constant = 8.314J/molK
E = 3/2 × 1.42 × 8.314 × 359
= 6357.4J
= 6.35KJ
Thus, we found that the thermal energy of the gas is 6.35KJ.
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A piece of metal was heated and then put it into 100.0 mL of water, initially at 21.2 *C. The metal and water were allowed to come to an equilibrium temperature, determined to be 32.0 *C. How much energy did the water absorb? (look at picture)
Answer:
4510 J
Explanation:
To calculate the energy of the water, you need to use the following equation:
Q = mcΔT
In this equation,
-----> Q = energy/heat (J)
-----> m = mass (g)
-----> c = specific heat capacity (J/g°C)
-----> ΔT = change in temperature (°C)
First, you need to determine the mass of the water. To do this, you need to multiply the given volume by the density of water (1.00 g/mL).
100.0 mL H₂O 1.00 g
------------------------ x ------------ = 100.0 g H₂O
1 mL
Now, you can plug the given values into the equation and solve for "Q" (Q = [tex]q_H_2_O[/tex]). The final answer should have 3 significant figures to match the given values with the lowest number of sig figs.
Q = ? J c = 4.18 J/g°C
m = 100.0 g ΔT = 32.0 °C - 21.2 °C = 10.8 °C
Q = mcΔT
Q = (100.0 g)(4.18 J/g°C)(10.8 °C)
Q = 4510 J
4510Answer:
Explanation:
The solutions that are used in this experiment have alcohols as both the solvent and the reactant. How is the excess alcohol removed?.
Excess alcohol is removed by Vacuum filtration.
What is vacuum filtration?Vacuum filtration is a methodology where a tension differential is kept up with across the channel medium by clearing the air beneath the channel paper. Vacuum filtration gives a power on the arrangement notwithstanding that of gravity and builds the pace of filtration. Vacuum filtration is the standard strategy utilized for isolating a strong fluid blend when the objective is to hold the strong (for instance in crystallization).How do you dry a product after vacuum filtration?The strong can be dried rapidly by washing the strong with an unpredictable fluid (methanol, CH3)2CO, or ether are normal) that the strong won't break up in. In the event that the filtrate is to be gathered, change the getting jar prior to washing.To learn more about vacuum filtration from the given link
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Heliox is a mixture of helium and oxygen gas used to help patients with breathing difficulties. It is also used for scuba diving. The total pressure in a tank of heliox is 208 atm. If the mole fraction of o2 is 0. 220, what is the partial pressure of he in the tank?.
It should be remembered that the mole fraction of any component making up a system is 1.
A mole fraction is what?the proportion of the moles of one component to the total moles of all the components in a solution or other mixture.
What is mole fraction and an example of it?The ratio of molecules of one component in a mixture is known as a mole fraction. For instance, if the methane mole fraction in a gas is 0.90, then this implies that 90% of the molecules are methane. The mixture also contains 90% methane since the amount fractions resemble mole fractions.
How is the mole fraction determined?By dividing the moles of the solute by the total moles of the substances in the solution, you may determine the mole fraction of the solute.
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Apples tend to be more acidic than cherries. that means that cherries then to have a
Answer:
Higher pH (more alkaline)
Explanation:
The pH scale measures on a scale of 0 to 14 the acidity or basicness of whatever is being tested.
The lower the pH, the more acidic it will be. Acids are scaled as being anything having a pH of lower than 7.
The higher the pH, the more alkaline (or basic) it will be. Bases are scaled as being anything having a pH of higher than 7.
Substances that are at a pH of 7 are considered neutral, like water (H2O)
