Answer:
Molarity: 0.522M
Percentage by mass: 2.36 (w/w) %
Explanation:
Formic acid, HCOOH reacts with NaOH as follows:
HCOOH + NaOH → NaCOOH + H₂O
To solve this question we must find the moles of NaOH added = Moles formic acid. Taken into account the dilution that was made we can find the moles -And molarity of formic acid and its percentage by mass as follows:
Moles NaOH = Moles HCOOH:
0.01580L * (0.1322mol / L) =0.002089 moles HCOOH
Moles in the original solution:
0.002089 moles HCOOH * (25mL / 10mL) = 0.005222 moles HCOOH
Molarity of the solution:
0.005222 moles HCOOH / 0.01000L =
0.522MMass HCOOH in 1L -Molar mass: 46.03g/mol-
0.522moles * (46.03g / mol) = 24.04g HCOOH
Mass solution:
1L = 1000mL * (1.02g / mL) = 1020g solution
Mass percent:
24.04g HCOOH / 1020g solution * 100
2.36 (w/w) %
What are the IUPAC name?
Answer:
IUPAC
Explanation:
International Union of Pure and Applied Chemistry
what is the definition of isomerism
Answer:
Isomerism is the phenomenon in which more than one compounds have the same chemical formula but different chemical structures. Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule are called isomers. Therefore, the compounds that exhibit isomerism are known as isomers.
The word “isomer” is derived from the Greek words “isos” and “meros”, which mean “equal parts”. This term was coined by the Swedish chemist Jacob Berzelius in the year 1830.
Explanation:
How many grams of chlorine are required in order to consume 100g of sodium chloride?
Answer:
92.1 g
Explanation:
Answer: 92.1 grams
I hope this helped :3
what are factors that affecting the boiling point of liquid?
Calculate the molar mass of Ca3(PO4)2
934.32 g Ca3(PO4)2 =______
moles Ca3(PO4)2
Answer:
Molar mass of Ca₃(PO₄)₂ = 310.18 g/mol934.32 g Ca₃(PO₄)₂ = 3.01 moles Ca₃(PO₄)₂Explanation:
The molar mass (MM) of Ca₃(PO₄)₂ can be calculated as follows:
MM of Ca₃(PO₄)₂ = (MM of Ca)*3 + [(MM of P) +(MM of O)*4]*2MM of Ca₃(PO₄)₂ = 310.18 g/molNow we can convert 934.32 g of Ca₃(PO₄)₂ into moles:
934.32 g ÷ 310.18 g/mol = 3.01 molesHypothetical element A has three stable isotopes. The first isotope has a mass of 35.01 amu and an abundance of 35.00%. The second isotope has a mass of 36.01 amu and an abundance of 15.00%. The third isotope has a mass of 37.02 amu and an abundance of 50.00%. What is the atomic mass of element A
Answer:
36.16 amu
Explanation:
From the question given above, the following data were obtained:
1st Isotope:
Mass of 1st isotope = 35.01 amu
Abundance of 1st isotope = 35%
2nd isotope:
Mass of 2nd isotope = 36.01 amu
Abundance of 2nd isotope = 15%
3rd isotope:
Mass of 3rd isotope = 37.02 amu
Abundance of 3rd isotope = 50%
Atomic mass of element A =?
The atomic mass of element A can be obtained as follow:
Atomic mass = [(mass of 1st × Abundance)/100] + [(mass of 2nd × Abundance)/100] + [(mass of 3rd × Abundance)/100]
= [(35.01 × 35)/100] + [(36.01 × 15)/100] + [(37.02 × 50)/100]
= 12.25 + 5.40 + 18.51
= 36.16 amu
Thus, the atomic mass of element A is 36.16 amu
from E=mc²=hv show that wavelength=h/mv
Explanation:
To show - from E=mc²=hv show that wavelength=h/mv
Proof -
Given that,
E = mc²
E = hν
By equating both the equations, we get
mc² = hν
Because real particles do not travel at the speed of light, De Broglie submitted velocity ( v ) for the speed of light ( c ).
mv² = hν
Through the equation λ , de Broglie substituted v/λ for ν and arrived at the final expression that relates wavelength and particle with speed.
mv² = hv/λ
⇒λ = hv/mv²
⇒λ = h/mv
Hence showed.
What is a metal oxide + acid
Metal oxide + acid —> __+__
Answer:
Metal oxide + acid —> salt + water
Explanation:
Select ALL of the abiotic factors
lesson 5.01
Question 1 options:
air
light
fungi
soil
salinity
Answer:
I think it should be
salinity and
light
Deep sea divers can experience the bends due to an increased amount of nitrogen in the blood
with higher pressure if they dive deeper than 40 meters and come up too fast. If at 1.05 atm
(surface conditions) the solubility of nitrogen, N2, is 21.1 mg/L, what is the solubility at this 40m
depth where the pressure is 4.97 atm?
a. 21.1 mg/L
b. 42.2 mg/L
C. 49.9 mg/L
d. 99.9 mg/L
b is the correct answer
Answer: D. 99.9mg/L
Explanation:
21.1x4.97/1.05=99.9
Which substance has Delta.Hf defined as 0 kJ/mol?
A. H2O (s)
B. Ne (l)
C. F2 (g)
D. CO2 (g)
Answer:
its actually c
Explanation:
If 50 mL of pure acetone is mixed with 450 mL of water, what is the percent by volume of acetone?
Answer:
10%
Explanation:
The percent by volume of acetone is given by the following formula:
% v/v = Volume of acetone / Total Volume * 100%
Now we calculate the total volume of the solution:
Total Volume = Volume of Acetone + Volume of Water
Total Volume = 50 mL + 450 mL = 500 mL
Then we calculate the percent by volume:
% v/v = 50 mL / 500 mL * 100 % = 10%
Consider the role of third world countries in this system. How would they benefit or not benefit from a cap and trade system?
Answer:
they would benefit
Explanation:
they would benefit because we can move more machines that reduce pollution in those countries.
How much is 1 mole of something?
Answer: D.
Explanation:
6.02 * 10^-23
Which of the following is most easily oxidized?
A. Ni2+
B. Fe3+
C. H+
D. Fe2+
Answer:
B: Fe3+
Explanation:
Usually in oxidation reactions, the oxidation number of a monatomic ion is the same as the charge on the ion, for example: oxidation number for Na^(+) is +1 , while in S^(2-), oxidation number is -2.
Now, from the activity series of metals in aqueous solution which I attached, we will see that iron (Fe) is easily oxidized than Nickel (Ni2+) and hydrogen (H+).
So we are left with Fe^(2+) and Fe^(3+).
Now, an increase in oxidation number means the more likely to be oxidized.
Thus, Fe^(3+) is the most easily oxidized.
(i)What happens when an aqueous solution of sodium sulphate reacts with an aqueous
solution of barium chloride ? (i) Write the balanced chemical equation for the reaction which takes place.(ii) Name the type of chemical reaction which occurs. Define.
Explanation:
2nacl+baso4
the orginal equation is
Na2so4+Bacl2
then na react with cl and ba react with so4
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When two nitrogen atoms combine, they form a
A) Compound
B) Liquid
C) mixture
D) Molecule
Answer:
I guess the answer is compound
Explanation:
Coz compound it is on there playing with me again Go ahead and paste it in the class
Is anyone good at chemistry if so Is it possible could someone help me please
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344.0 / 68.8 = 5 (no.of half life that have elapsed)
Mass remains = (1/2)^n × (original mass)
= (1/2)^5 × 200
= (0.5) ^5 × 200
= 0.03125 × 200
= 6.25 grams
Why is it necessary to keep the total number of drops in the test tubes
consistent?
Answer:
I don't know if this is right but..
Explanation:
It is important to keep the volume of the reactant constant because it ensures that the temperature change was the result of the reactants consumed
Why it is necessary to keep the to drops in the test tubes consistent is:
To be able to achieve your desire results, it is imperative that you follow the procedure and use the drops specified because any other drop may shift the equilibrium to the right and this will increase the rate of reaction leading to more collisions of that reactant in a specific time period and therefore alter (slow or increase) the chemical reaction.In a chemical reaction, the reactants, are undergoing chemical reaction which therefore brings about a products. The reaction rate shows how quickly or slowly the reaction takes place.Conclusively, Why it is necessary to keep the to drops in the test tubes consistent is:
To be able to achieve your desire results, it is imperative that you follow the procedure and use the drop specified because any other drop may shift the equilibrium to the right and this will increase the rate of reaction leading to more collisions of that reactant in a specific time period.Learn more from
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A 2.00 L flask is filled with propane gas (C3H8) at a pressure of 1.10 atm and a temperature of 258 K. What is the mass of propane in the flask?
Answer:
m = 4.58 g.
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to realize this problem is solved via the ideal gas equation:
[tex]PV=nRT[/tex]
As we can calculate the moles of propane given the pressure, temperature and volume as shown below:
[tex]n=\frac{PV}{RT} \\\\n=\frac{1.10atm*2.00L}{0.08206\frac{atm*L}{mol*K}*258K} \\\\n=0.104mol[/tex]
Finally, since the molar mass of propane is 44.1 g/mol, we calculate the mass by following the shown below mole-mass conversion factor:
[tex]m=0.104mol*\frac{44.1g}{1mol}\\\\m= 4.58g[/tex]
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Why is elemental zinc considered a pure substance
A) it is a metal
B) it is a mixture of different atoms
C) it must be created in a lab
D) all elements are considered pure substances
Answer:
D
Explanation:
Answer:
D
Explanation:
Because it is true
34. Which statement describes what occurs in the
following redox reaction?
Cu(s) + 2Ag (aq) → Cu2+ (aq) + 2Ag(s)
(1) Only mass is conserved.
(2) Only charge is conserved.
3 Both mass and charge are conserved.
(4) Neither mass nor charge is conserved.
Answer:
3 Both mass and charge are conserved.
Explanation:
The equation of the reaction is;
Cu(s) + 2Ag+ (aq) → Cu2+ (aq) + 2Ag(s)
A redox reaction is an acronym for oxidation-reduction reaction. This refers to a reaction in which the oxidation number of one specie is increased while the oxidation number of the other specie is decreased.
This means that one specie looses electrons while the other specie gains electrons. Here, Cu(s) looses electrons while Ag+(aq) gains electrons from left to right in the reaction.
In a redox reaction, both mass and charge are conserved. This means that the total mass and charge on the reactants side is the same as the total mass and charge on the products side.
mechanism of the reaction citric acid with sodium bicarbonate?
Explanation:
When citric acid and baking soda react with one another, they change chemi- cally and form sodium ions, citric acid ions, carbon dioxide gas, and water. ... It also makes up the bubbles in carbonated drinks and is a gas we naturally exhale. Carbon dioxide gas is safe in the quantities produced in the activities.
Which of the following statements about the pH of 0.010 M HClO4 is correct?
pH=2.00, because [H+]=1.0×10−2M.
A: p H equals 2.00 , because the molar concentration of H with a positive 1 charge equals 1.0 times 10 to the negative 2 power molar .
pH=2.00, because [H+]=2.0×10−2M.
B: p H equals 2.00 , because the molar concentration of H with a positive 1 charge equals 1.0 times 10 to the negative 2 power molar .
pH>2.00, because HClO4 is a strong acid.
C: p H is greater than 2.00 , because H C l O 4 is a strong acid.
pH<2.00, because HClO4 is a weak acid.
Answer:
Option B: p H equals 2.00 , because the molar concentration of H with a positive 1 charge equals 1.0 times 10 to the negative 2 power molar .
pH = 2 because [H⁺] = 1×10¯² M
Explanation:
To know which option is correct, we shall determine the pH of the 0.010 M HClO₄ solution. This can be obtained as follow:
We'll begin by calculating the concentration of the hydrogen ion [H⁺] in the solution. This is illustrated below:
HClO₄ is a strong acid and will dessociates as follow:
HClO₄ (aq) —> H⁺ (aq) + ClO₄¯ (aq)
From the balanced equation above,
1 mole of HClO₄ produced 1 mole H⁺.
Therefore, 0.010 M HClO₄ will also produce 0.010 M H⁺.
Finally we shall determine the pH of the solution. This can be obtained as follow:
Concentration of the hydrogen ion [H⁺] = 0.010 = 1×10¯² M
pH =?
pH = –Log [H⁺]
pH = –Log 1×10¯²
pH = 2
Thus,
The pH = 2
because,
[H⁺] = 1×10¯² M
Thus, option B gives the correct answer to the question.
Based on the definition of pH, pH of 0.010 M solution of HClO4 equals 2.00, because the molar concentration of H with a positive 1 charge equals 1.0 times 10 to the negative 2 power molar.
What is pH?The pH of a solution is the negative logarithm of the hydrogen ion concentration of a solution.
pH of a solution is a measure of the acidity of the solution.
pH = - log[H+]where
[H+] is hydrogen ion concentrationFor the 0.010 M solution of HClO4, [H+} = 0.01 M
pH = -log(0.01)
pH = 2.00
Therefore, pH of 0.010 M solution of HClO4 equals 2.00, because the molar concentration of H with a positive 1 charge equals 1.0 times 10 to the negative 2 power molar.
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I
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Answer:
ummm u ok?
Explanation:
7. What is the pH of [OH-] = 1.0 * 10-5 solution?
О
1
5
14
9
Answer:
I'd 9 Coz is better than anything else I help so u need to other people that question don't be jealous of them
One liter of a gas is in a sealed chamber containing a moveable piston. If the piston is moved so that the volume of the gas is compressed to a volume of one-half liter, what will happen to the pressure on the gas? (Assume the temperature is constant and no gas particles are lost.)
Answer:
One liter of a gas is in a sealed chamber containing a moveable piston. ... It would be impossible to move the piston since gases are not compressible. The pressure will be twice the original value.
Explanation:
ch3cooh number of bonding pairs and lone pairs.
Answer:
whats the question?
Explanation:
Give the Shorthand Electron Configuration for the following elements:
Nickel
Group of answer choices
[Kr] 3d8 4s2
[Ne] 3d6 4s2
[Ar] 3d8 4s2
answer of this question is [Ar]3d8 4s2
Answer: [Ar] 3d8 4s2
Explanation: Wikipedia
Titan, the largest moon of Saturn, has an atmosphere that is about 94% nitrogen (N2) and 6% methane (CH4). The molecular mass of nitrogen is 4.651e-26kg and the molecular mass of methane is 2.663e-26kg. The acceleration due to gravity at the surface is about 1.35 m/s^2. For this problem, assume that Titan's atmosphere is in thermal equilibrium at 100 K. What fraction of the atmosphere is methane at altitude 2 km
Answer:
9.493 e-01
Explanation:
Given that Titan's temperature at thermal equilibrium = 100 K
Determine the fraction of the atmosphere that is methane
at an altitude of 2 km
applying Ideal gas law
P = Po e^ -Z/k ---- ( 1 )
In this question Z = M₀ g z ( replace -Z in equation 1 with M₀gz )
P = Po e^- M₀gz / RT ------ ( 2 )
where : Mo = 16 * 10^ -3 kg/mol , g = 1.35 m/s^2 , z = 2 * 10^3 m , R = 8.3 J/mol.k , T = 100 k
insert values Back to equation 2
P = Po e^-0.052
P = 0.9493 Po
hence the fraction of the atmosphere that is methane
= P / Po = 9.493 * 10^-1
= 9.493 e-01