propanoyl chloride reacts with LiAlH4, what will be the product
3. 78 mL of 2.5 M phosphoric acid is neutralized with 500 mL of potassium hydroxide. What is the
concentration of the base?
What is 0.29km in mm
Need some help with this Chem Question :)
Answer:
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
Explanation:
The activity series helps us to easily define whether or not a reaction will occur.
Elements at the top of the activity series are highly reactive and will always displace those at the bottom of the series in any reaction.
With the above information in mind, let us answer the questions given above.
Ag + NaNO₃ —> Na + AgNO₃
The above reaction will not occur because Na is higher than Ag in the activity series. Thus, Ag cannot displace Na from solution.
Pb + Mg(NO₃)₂ —> Pb(NO₃)₂ + Mg
The above reaction will not occur because Mg is higher than Pb in the activity series. Thus, Pb cannot displace Mg from solution.
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
The above reaction will occur because Mg is higher than Fe in the activity series. Thus, Mg will displace Fe from solution.
Cu + Mg(NO₃)₂ —> Cu(NO₃)₂ + Mg
The above reaction will not occur because Mg is higher than Cu in the activity series. Thus, Cu cannot displace Mg from solution.
From the above illustration, only
Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂
Will occur.
( Endocytosis / Exocytosis ) is the movement of substances out of a cell by vesicular transport.
Answer:
Exocytosis
Explanation:
Some molecules are simply too big to move via a transport protein or the plasma membrane. To carry these macromolecules in or out of the cell, cells employ two more active transport pathways. Macromolecules or big particles are transported across the plasma membrane via Vesicles transport or other cytoplasmic structures. They are of two types, Endocytosis and Exocytosis
From the given information, Exocytosis is the right answer.
It is the process of vesicles combining with the plasma membrane thereby releasing their contents to the exterior of the cell. When a cell creates components for export, such as proteins, or when it gets rid of a waste product or a toxin, exocytosis occurs. Exocytosis is the process by which newly generated membrane proteins and membrane lipids are transported on top of the plasma membrane.
33. The compound C2H2 belongs to the series of
hydrocarbons with the general formula
A CH,
B C2 H2o
C. C,H2n-2
D. C2.H2n-2
Answer:D
Explanation:
A researcher accidentally spilled some sand into his beaker containing crystalline compound X. Knowing what he did about melting points, he was not worried about obtaining the melting point of compound X with a few grains of sand present. Why
Answer:
See explanation
Explanation:
If we look at the structure of X, we will discover that X is an organic compound. The compound will certainly have a much lower melting point than sand.
This is because, sand is composed of high melting point inorganic materials.
Hence, even though the researcher accidentally spilled some sand into the the beaker containing the crystalline substance X, he does not need to be perturbed since the melting point of X is much lower than that of sand
Small quantities of hydrogen gas can be prepared in the lab by addition of hydrochloric acid to zinc. The gas is typically collected over water. What volume of hydrogen can be collected from 0.625g Zn
Answer:
0.214 L
Explanation:
Step 1: Write the balanced equation
This is a single displacement reaction.
Zn(s) + 2 HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)
Step 2: Calculate the moles corresponding to 0.625 g of Zn
The molar mass of Zn is 65.38 g/mol.
0.625 g × 1 mol/65.38 g = 9.56 × 10⁻³ mol
Step 3: Calculate the moles of H₂ produced from 9.56 × 10⁻³ moles of Zn
The molar ratio of Zn to H₂ is 1:1. The moles of H₂ produced are 1/1 × 9.56 × 10⁻³ mol = 9.56 × 10⁻³ mol.
Step 4: Calculate the volume occupied by 9.56 × 10⁻³ moles of hydrogen
Assuming standard pressure and temperature, 1 mole of hydrogen occupies 22.4 L.
9.56 × 10⁻³ mol × 22.4 L/1 mol = 0.214 L
PLEASE ANSWER ASAP I WILL GIVE YOU BRAINLIEST AND GIVE FREEE POINTSSS AFTER
Describe each of the following types of reactions and give one example of each: combustion, synthesis, decomposition, single replacement, double replacement.
Explanation:
Combustion Reaction:-A kind of chemical reaction in which a reaction between any combustible substance and an oxidizer takes place in order to form an oxidized product.
Eg: Fuel + O2 → CO2 + H2O.
The burning of charcoal is a combustion reaction.
Synthesis Reaction:-A synthesis reaction occurs when two or more reactants combine to form a single product.
Eg: Na + Cl → NaCl
An example of a synthesis reaction is the combination of sodium (Na) and chlorine (Cl) to produce sodium chloride (NaCl).
Decomposition Reaction:-A decomposition reaction occurs when one reactant breaks down into two or more products.
Eg: NaCl → Na + Cl
An example of a decomposition reaction is the breakdown of Sodium chloride to give sodium and chloride.
Single Replacement Reaction:-A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.
Eg: Zn + 2 HCl → 2 ZnCl + H2
The reaction between zinc metal and hydrochloric acid to produce zinc chloride and hydrogen gas is an example of a single-displacement reaction.
Double Replacement Reaction:-A double replacement reaction is a type of chemical reaction that occurs when two reactants exchange cations or anions to yield two new products.
Eg: AgNO 3 + NaCl → AgCl + NaNO
The reaction between silver nitrate and sodium chloride to produce silver chloride and sodium nitrate is an example of a double-displacement reaction.
True or false
Bases will have a relatively high concentration of hydroxide ions and a pH around 10.
Answer:
false
Explanation:
It is because the pH for Hydroxide ions is 7
Answer:
True
Explanation:
Acids have a low concentration of hydroxide ions and a pH of 1-6, while bases have a high concentration of hydroxide ions and a pH of 8-14
Someone plssss help meeee !!!! How much energy is required to vaporize 112 g of water? ???
Answer:
6.05 × 10⁴ cal
Explanation:
Step 1: Given and required data
Mass of water (m): 112 g
Enthalpy of vaporization of water (ΔHvap): 540 cal/g
Step 2: Calculate how much energy is required to vaporize 112 g of water
Vaporization is a physical change in which a substance goes from the liquid state to the gaseous state. We can calculate the energy required (Q) using the following expression.
Q = ΔHvap × m
Q = 540 cal/g × 112 g = 6.05 × 10⁴ cal
Which of the following can be mixed in solution with H2CO3 to make a buffer?
Answer:
Sodium hydroxide solution.
Explanation:
because it is a strong base. Since carbonic acid is a weak acid, a solution formed resists change in pH on addition hence buffer formed.
Sodium hydroxide solution can be can be mixed in solution with H2CO3 to make a buffer.
What is buffer?A buffer would be a solution that could withstand pH changes when acidic as well as basic components are added.
What is solution ?The term "solution" was most frequently associated with the liquid form of matter, however gases as well as solids can also form solutions.
A traditional buffer is made up of a weak acid including its conjugate salts, such as carbonic acid (H2CO3) as well as sodium bicarbonate (NaHCO3) or sodium bicarbonate with calcium carbonate.
Sodium hydroxide solution can be can be mixed in solution with H2CO3 to make a buffer.
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Acetylenic fatty acids are found in many tropical plants. Compound B, C18H32O2, is one such compound; it absorbs 2 equivalents of H2 when treated with H2 over a Pd/C catalyst. Ozonolysis of compound B produces the following products: nonanedioic acid (HOOC(CH2)7COOH) nonanoic acid (HOOC(CH2)7CH3) Draw the structure of compound B.
Answer:no
Explanatio:
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Phosphorus pentachloride decomposes according to the chemical equation
PCI (9) PCI, (g) + Cl, (9) K = 1.80 at 250 °C
A 0.3723 mol sample of PCI; (g) is injected into an empty 4.25 L reaction vessel held at 250 °C.
Calculate the concentrations of PCI; (g) and PCI, (9) at equilibrium.
[PCI) =
M
[PC1,1 =
M
Answer:
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Please help me out for this question.
Answer:
I wish i could help but I don't understand it .so maybe someone can come and help u
Answer:
b
Explanation:
What what I put to answer this?
Which is equal to a temperature of 50°F?
Answer:
10⁰C
Explanation:
10⁰C is equal to 50⁰F
How many molecules are contained in 52.5 moles of C2H8?
please explain if you can
Answer:
3.1621 × 10²⁵ molecules
Explanation:
From the given information:
Moles of C2H8 = 52.5 moles
number of moles = mass/molar mass
molar mass of C2H8 = (6 *2) + (1*8)
= 12 + 8
= 20 g/mol
∴
52.5 moles = mass of C2H8 / 20 g/mol
mass of C2H8 = 52.5 moles × 20 g/mol
mass of C2H8 = 1050 grams
Recall that;
1 mole = 6.023 × 10²³ molecules
∴ 52.5 moles of C2H8 = (52.5 × 6.023 × 10²³) molecules
=3.1621 × 10²⁵ molecules
What is the PH of a solution with a concentration of 5.2 x 10-8 M H3O?
Answer:
7.28Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log [ { H_3O}^{+}][/tex]
From the question we have
[tex]ph = - log(5.2 \times {10}^{ - 8} ) \\ = 7.28399[/tex]
We have the final answer as
7.28Hope this helps you
HURRY! Carbon and oxygen combine to form carbon dioxide. What are the products, or what is the product, in this chemical reaction?
-carbon and oxygen
-carbon dioxide
-carbon only
-oxygen only
Answer:
Carbon dioxide.
Explanation:
Hope this will help
What is the molar mass of a substance
A) the mass in grams of one mole of a substance
B) the number of particles in one gram of a substance
C) the number of moles in one gram of a substance
D) the mass in grams of one particle of a substance
thank you :)
Answer:
A) the mass in grams of one mole of a substance.
Explanation:
The molar mass of a substance is the mass in grams of 1 mole of the substance. As shown in this video, we can obtain a substance's molar mass by summing the molar masses of its component atoms. We can then use the calculated molar mass to convert between mass and number of moles of the substance.
PLS HELP ME WITH THESE TWO QUESTIONS WILL MARK U AS BRAINLIEST !!
Answer:
See explanation
Explanation:
From the parameters provided;
V=?
n= 1.46 moles
P= 0.982 ATM
T= 13°C + 273 = 286 K
R = 0.0821 L.atm/mol.K
From
PV= nRT
V= nRT/P
V= 1.46 × 0.0821 × 286/0.982
V= 34.9 L
b) Boyle's law states that, the pressure of a given mass of gas is inversely proportional to its volume at constant temperature and pressure. This statement is a correct postulation about ideal gases which can be arrived at from the kinetic theory of gases.
How much energy would it take to freeze 12.5 g of water?
The amount of energy needed to freeze 12.5 grams of water into ice is equals to 14.295 kilo joules.
How do we calculate energy?Energy required to freeze water will be calculated by using the following equation as:
Q = mcT, where
m = mass of water = 12.5g = 0.0125kg
c = specific heat of water = 4.187 kJ/kg.K
T = temperature to freeze = 0 degree C = 273.15 K
On putting values we get,
Q = (0.0125)(4.187)(273.15)
Q = 14.295 kJ
Hence required amount of energy is 14.295 kJ.
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A gas mixture being used to simulate the atmosphere of another planet consists of 320 mg of methane, 175 mg of argon, and 225 mg of nitrogen. Th e partial pressure of nitrogen at 300 K is 15.2 kPa. Calculate (a) the volume and (b) the total pressure of the mixture.
Answer:
The total pressure is 61.4 kPa, and the volume is 1.31 L.
Explanation:
Based on the given information, a gas mixture comprising 320 mg or 0.320 grams of CH4, 175 mg or 0.175 grams of Ar, and 225 or 0.225 grams of N. The number of moles of the gases presents within the mixture can be determined by using the formula,
Number of moles = Mass/ molecular mass
The molecular mass of methane is 16.04 grams per mole, the molecular mass of Argon is 40 grams per mole, and the molecular mass of Nitrogen is 28.02 grams per mole.
Now, the number of moles of CH4 is,
= 0.320 grams/ 16.04 grams per mole
= 0.0199 moles
The number of moles of Ar is,
= 0.175 grams/40 grams per mole
= 0.0044 moles
The number of moles of N2 is,
= 0.225 grams/28.02 grams per mole
= 0.0080 moles
The partial pressure of nitrogen given is 15.2 kPa or 0.15 atm. Thus, the partial pressure of other two gases will be,
CH4 = (15.2 kPa) (0.0199 moles)/(0.0080 moles)
= 37.8 kPa
Ar = (15.2 kPa) (0.0044 moles)/(0.0080 moles)
= 8.36 kPa
Therefore, the total pressure is 15.2 + 37.8 + 8.36 = 61.4 kPa or 0.606 atm
The total volume can be determined by using the formula,
V = nRT/P
Here n is the total number of moles of the gas, which is 0.0323 moles.
Now putting the values we get,
V = (0.0323 moles) (0.0826 atm*L/mol*K)(300 K)/(0.606 atm)
V = 1.31 L
Use the following balanced equation to answer the questions below.
Which statement about the relationship between laws, hypothesis, and theories is true?
The question is incomplete, the complete question is;
Which statement about the relationship between laws, hypotheses, and theories is true?
A.
Laws that remain true over an extended period of time are considered theories.
B.
A theory that holds true for a long time is considered a law.
C.
If a law is not contradicted after a lot of testing, it may be considered a hypothesis.
D.
If a hypothesis is not contradicted after a lot of testing, it may be considered a law.
Answer:
If a hypothesis is not contradicted after a lot of testing, it may be considered a law.
Explanation:
A hypothesis is an intelligent guess which is put forward to explain a particular scientific observation. Hypothesis are temporary explanations that must be subjected to rigorous scientific investigation.
If a hypothesis holds true for some time it is regarded as a theory. The theory is also subjected to further rigorous scientific experiments to see if it can be regarded as a law.
If the statement of the hypothesis is not contradicted after a lot of testing, it may be considered a law.
45. The reaction Cl2(g) 2Cl(g) is A. Exothermic because breaking bonds requires energy B. Exothermic because breaking bonds releases energy C. Endothermic because breaking bonds requires energy D. Endothermic because breaking bonds releases energy
Answer:
C. Endothermic because breaking bonds require energy
Explanation:
The reaction as follows is given in this question:
Cl2(g) → 2Cl(g)
According to this equation, chlorine molecule (Cl2) is broken down into chlorine atoms (2Cl) by breaking the bonds that holds the two atoms in the molecule together. Breaking of chemical bonds require energy input to occur.
An endothermic reaction is a reaction in which energy is absorbed or used up rather than released. Based on this definition, the reaction involving the breaking of bonds in chlorine molecule is an ENDOTHERMIC REACTION because breaking bonds require energy.
Would an electron in the 1s orbital of lithium require the same energy to move to a higher energy level as an electron in the
1s orbital of silver?
Answer:
See explanation
Explanation:
We must remember that the energy required to move an electron from the 1s orbital to a higher energy level depends on the size of the nuclear charge.
The higher the nuclear charge, the more closely held the 1s electron of the atom is to the nucleus and the more difficult it is to excite this electron.
Hence, it requires more energy to excite the 1s electron of silver having a larger size of nuclear charge than it is to excite a 1s electron in lithium.
by acid-base reaction explain why thymol is sparingly soluble in water but soluble in 1M NaOH solution
Answer:
Sulphanilic acid is insoluble in both water as well as in acid because it can not form hydrogen bonding with the water molecule. But it is soluble in aqueous mineral acid like HF,HCl,HNO3 because they are able to form a hydrogen bond with mineral acids. Was this answer helpful?
g A solution of permanganate is standardized by titration with oxalic acid, . To react completely with mol of oxalic acid required 22.69 mL of permanganate solution. The unbalanced chemical equation for the reaction in acidic solution is
The question is incomplete, the complete question is:
A solution of permanganate is standardized by titration with oxalic acid. To react completely with 0.0018 mol of oxalic acid required 22.69 mL of permanganate solution. The unbalanced chemical equation for the reaction in acidic solution is:
[tex]MnO_4^-(aq)+H_2C_2O_4(aq)\stackrel{\mathrm{Acidic}}{\longrightarrow} Mn^{2+}(aq)+CO_2(g)[/tex]
Determine the concentration of the permanganate solution in molarity.
Answer: The molarity of permanganate solution is 0.0317 M
Explanation:
The balanced chemical equation follows:
[tex]2MnO_4^-(aq)+6H^+(aq)+5H_2C_2O_4(aq)\stackrel{\mathrm{Acidic}}{\longrightarrow} 2Mn^{2+}(aq)+8H_2O(l)+10CO_2(g)[/tex]
Given values:
Moles of oxalic acid = 0.0018 moles
By the stoichiometry of the reaction:
If 5 moles of oxalic acid reacts with 2 moles of permanganate solution
So, 0.0018 moles of oxalic acid will react with = [tex]\frac{2}{5}\times 0.0018=0.00072mol[/tex] of permanganate solution
The formula used to calculate molarity:
[tex]\text{Molarity of solution}=\frac{\text{Moles of solute}\times 1000}{ \text{Volume of solution (mL)}}[/tex] .....(1)
Given values:
Moles of permanganate solution = 0.00072 moles
Volume of solution = 22.69 mL
Putting values in equation 1, we get:
[tex]\text{Molarity of permanganate solution}=\frac{0.00072\times 1000}{22.69}\\\\\text{Molarity of permanganate solution}=0.0317M[/tex]
Hence, the molarity of permanganate solution is 0.0317 M
The concentration of the permanganate solution in molarity is 0.0317 M
We'll begin by calculating the number of mole of permanganate needed to react with 0.0018 mole of oxalic acid.
2MnO₄¯(aq) + 5H₂C₂O₄(aq) + 6H⁺(aq) —> 2Mn²⁺(s) + 10CO₂(g) + 8H₂O(l)
From the balanced equation above,
5 moles of H₂C₂O₄ reacted with 2 moles of MnO₄¯
Therefore,
0.0018 mole of H₂C₂O₄ will react with = (0.0018 × 2) / 5 = 0.00072 mole of MnO₄¯
Finally, we shall determine the molarity of the permanganate solution.Mole of MnO₄¯ = 0.00072 mole
Volume = 22.69 mL = 22.69 / 0.02269 L
Molarity of MnO₄¯ =Molarity = mole / Volume
Molarity of MnO₄¯ = 0.00072 / 0.02269
Molarity of MnO₄¯ = 0.0317 MTherefore, the molarity of the permanganate solution is 0.0317 M
Complete question:
A solution of permanganate is standardized by titration with oxalic acid. To react completely with 0.0018 mol of oxalic acid required 22.69 mL of permanganate solution. The unbalanced chemical equation for the reaction in acidic solution is:
MnO₄¯(aq) + H₂C₂O₄(aq) —> Mn²⁺(s) + CO₂(g)
Determine the concentration of the permanganate solution in molarity.
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