A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, the molarity is 0.003 M.
What does Beer-Lambert law state?The Beer-Lambert law states that for a given material sample, path length and concentration of the sample are directly proportional to the absorbance of the light.
A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, we can calculate the molarity of the solution using the following expression.
A = ε × b × c
c = A / ε × b
c = 0.2 / (59 cm⁻¹ M⁻¹) × 1 cm = 0.003 M
where,
A is the absorbance.ε is the path length.b is the molar absorptivity coefficient.c is the molar concentration.A solution has an absorbance of 0.2 with a path length of 1 cm. Given the molar absorptivity coefficient is 59 cm⁻¹ M⁻¹, the molarity is 0.003 M.
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2 Cuso, +4 KI → 2 Cul +2 K,SO, + 12 9.
When 6.76 g of Cuso, reacts with 9.82 g of KI, how many grams of I, will be produced? 10. What is the limiting reactant?
How many grams of copper (1) iodide is made?
What mass of excess reactant remains?
If 3.5grams of iodine is produced, what is the percent yield?
SEP Define a Problem The test tubes
contain water (A) and three copper
sulfate solutions (B-D) with increasing
concentration. Why is it difficult to say
whether solution C is a concentrated
solution or a dilute solution? How can we
better define the problem?
We can better define the problem by saying that solution is concentrated or diluted with respect to solution B or D respectively.
ConcentrationThe concentration of solution C lies somewhere between that of B and D.
Thus, if we are to qualify the concentration of solution C with respect to that of B, we will say it is concentrated.
If we are to qualify the concentration of solution C with respect to that of D, we will say solution C is diluted.
More on concentration can be found here: https://brainly.com/question/7127950
Please help me please
Answer:
I can help you with that... I cannot screenshot your question... what you can do is send me that PDF
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Calculate the molarity of 6.14 g of LiNO3 in 505 mL of solution.
Answer: 0.18
Explanation:
the molarity equation is moles of solute over L of solution:
mol (solute)/L (solution
so you need to convert 6.14g of LiNO3 into moles so:
6.14g LiNO3 • 1 mol
———— = 0.0890552 mol
68.946g LiNO3 (molar mass)
then you need to convert 505ml to L:
505/1000= 0.505
then you just follow the equation
0.0890552 mol / 0.505 L = 0.17634694 or 0.18 for sigfigs
0.18 M
hope this helps :)
A gas occupies 200cm^3 at 15°c and 750mmHg
What volume will it occupy at 50°C and 700mmHg
Answer:
357.14 cm^3
Explanation:
From Law of Proportions,
P1V1/T1 = P2V2/T2
750 x 200 / 15 = 700 x V2 / 50
50 x 200 = 14 x V2
V2 = 10000 / 14
= 5000 / 14
= 357.14
From the reaction given, which of the following is a conjugate acid-base pair. pls help.
I don't do physics in school guyz so please
When 3 moles of nitrogen monoxide are formed, how many moles of oxygen reacted?
4 NH3(g) + 5O2 (g) 4 NO (g) + 6 H2O (1)
->
Answer:
3.75
Explanation:
it's gonna be a decimal number,cus from the formula 5moles produce 4moles of NO
so if 3 moles we're to be produced,it will be 3x5 divide by 4
why do we measure the mass of ten pennies instead of the mass of one penny ?
How many kilocalories of heat are needed to melt 65.0 g of ice at 0 °C?
Answer:
21.7 kj
Explanation:
The heat required to change the phase of a matter is calculated by using the latent heat formula, Q=ML, where M is the mass released or absorbed during the phase change and L is the latent heat of a material. Since ice is melted into water, this process is technically called the heat of endorthermic phase change that is Q_in=ml
The latent heat of water is 334 kg/kj. In order to melt 65. 0g of ice Q=0.065 x 334kj/kg =21.71 of heat required
Which of the following best defines Avogadro's number?
Mass, in grams, of each particle of the substance
Number of particles in one mole of a pure substance
O Mass, in grams, of the nucleus of the substance's atoms
Total mass, in grams, of all the particles in one mole of the substance
Avogadro's number is the number of particles in one mole of a pure substance.
What is Avogadro's number?The Avogadro number or constant was ned after an Italian scientist that discovered it and He is called Amedeo Avogadro. It is the the number of particles in one mole of a substance or it can be refer to the proportionality factor that of a number of constituent particles in a sample with the amount of substance contained in the sample. Its SI unit = 6.02214076×10²³ mol⁻¹.
Therefore, Avogadro's number is the number of particles in one mole of a pure substance.
Learn more about Avogadro number from the link below.
https://brainly.com/question/10614569
Describing types of chemical bonds Match each bond with the rearrangement of the valance electrons needed to form that bond metallic bond ionic bond covalent bond sharing of electrons sharing of many electrons transferring of electrons
Answer:
metallic bond —> sharing of many electrons
covalent bond —> sharing of electrons
ionic bond —> transferring of electrons
Explanation:
im not 100% sure this is right but i hope it still helps!
A small-sized woman has 6.4 x 10-3 moles of hemoglobin (molar mass of hemoglobin = 64, 456 g/mol) in her blood. Show your work
How many hemoglobin molecules are in this person’s body?
What is the mass (g) of hemoglobin molecules in this person’s body?
Answer:
Explanation:
Interesting question - especially if you are afflicted by something like Leukemia where it pays to know everything you can about Hemoglobin.
Molecules
1 mole of anything has 6.02 * 10^23 in this case molecules
6.4*10^-3 moles has x number of molecules
Set up the proportion
1/6.4*10^-3 = 6.02 * 10^23 molecule / x Cross Multiply
x = 6.4*10^-3 * 6.02 * 10^23
x = 3.853*10^21 molecules
Mass Hemoglobin
1 mol of hemoglobin is 64456 grams
6.4*10^-3 moles = x grams Cross multiply
x = 64456 * 6.4*10^-3
x = 412.5 grams of hemoglobin in this woman's body.
If you are American and think in pounds, then this is roughly a pound of hemoglobin.
Considering that you need hemoglobin to carry oxygen around to various organs, it is not an awful lot. That's the miracle of the human body.
A sample of Ne gas occupies 0.220L at 0.86 atm. What will be its volume at 29.4kPa?
Answer:
0.66 L
Explanation:
Here it's given that a sample of Neon occupies a volume of 0.220 L at 0.86 atm . And we need to find out its volume at 29.4 kPa .
If we assume temperature to be constant , then we can apply Boyle's Law , which states that ,
" For a fixed amount of gas at constant temperature , pressure is inversely proportional to the volume . "
Mathematically ,
[tex] P \propto \dfrac{1}{V}[/tex]
Taking k as constant ,
[tex] P =\dfrac{k}{V}[/tex]
And we can say that ,
[tex] P_1 V_1 = P_2V_2[/tex]
Here ,
P_1 = 0.87 atm P_2 = 29.4 kPa = 29400 PaAs we know that ,
[tex] 0.987 atm = 10^5\ Pa [/tex]
So ,
[tex] 29400 Pa = 0.29 \ atm [/tex]
V_1 = 0.220 L V_2 = ?So that ,
[tex] (0.87 atm )(0.220L) = (0.29atm)(V_2)\\[/tex]
[tex] V_2 = \dfrac{0.87 \times 0.220}{0.29} L [/tex]
Simplify ,
[tex] V_2 = 0.66\ L [/tex]
Hence the new Volume of the gas is 0.66 L .
I hope this helps.
The volume of a container increases from 5L to 9L. What is the final pressure if the original pressure was 11 atm
Answer:
6.11 atm
Explanation:
P1V1=P2V2
(11)(5) = (P2)(9)
55/9 = 6.11 atm = P2
why are atoms so picky on who they bond with
Explanation:
Atoms are not really picky. They actually bond with other atoms to form an octect state. Let's take an example of an atom with, say, 2 valence electrons. This atom will have to bond with an atom which has 6 valence electrons to reach its octect state (6 + 2 = 8 =》 octect state is from L shell and above).
Hope it helps ⚜
5227 grams of iron is how many moles?
Answer:
93.7
Explanation:
moles = mass ÷ relative atomic mass
mass = 5227g, relative atomic mass of Fe = 55.8
moles = 5227 ÷ 55.8 = 93.7 (1dp)
A method of calculating the amounts of reactants needed to produce desired amounts of products is called
Describe the relationship between the mole and molar mass. Be prepared to describe the process for converting between moles and molar mass.
Answer:
The molar mass of any substance is the mass in grams of one mole of representative particles of that substance. ... In such a conversion, we use the molar mass of a substance as a conversion factor to convert mole units into mass units (or, conversely, mass units into mole units).
Explanation:
Answer:
conversion factor to convert mole units into mass units
Explanation:
thats the answer, ur welcome!!!!
What is the percent composition of oxygen in lithium oxide?
Answer: 72.71%
Explanation:
What is the mass of an object that has a volume of 12cm3 and a density of 1.5g/cm3
Answer:
18g
Explanation:
D=m/v
D= Density (g/mL) OR (g/cm^3)
m= mass (g)
v= volume (mL)
Use the Desity formula to find the mass by rearranging the formula so that m = D*v
Simply multiply the density by the volume
1.5*12 =18g
because it is the mass you’re looking for.
Is Aspartame (C14H18N2O5) held together through ionic or covalent bonds? Explain your reasoning.
Answer:
Covalent
Explanation:
There are 14 carbon atoms which are much more.Carbon has tetravalent structure and valency is 4 .Carbon never forms ionic compounds .So it's Covalent bonded compound.what is non electrlyte
What is the molecular formula of a molecule that has a molecular mass of 180.8 g/mol and an empirical formula of CH2O?
Answer:
The compound is "C6H12O6"
Explanation:
we know the relation that
Molecular formula mass = n. (Empirical formula mass)
180.8=n(30.0156)
n= 6
So
Molecular formula = n. (Empirical formula)
Molecular formula= 6 ( CH2O)
Molecular formula = C6H12O6
pls done it i will mark brainliest
Answer:
outside, ininside, outExplanation:
The volume occupied by 9 x 1023 molecules of nitrogen gas at STP is closest to
1.5 L
22.4 L
33.6 L
0.5 L
This problem is providing the number of molecules of nitrogen at STP and asks for the volume they take up. At the end, the result turns out to be 33.6 L according to the following.
Avogadro's lawIn chemistry, gas laws are used to relate pressure, temperature, volume and moles as an indicator of the behavior of gases. Thus, since this problem provides the number of molecules of nitrogen gas at STP, standard pressure and temperature (1atm and 273K), one knows the Avogadro's law must be utilized.
In such a way, this law allows us to know that 1 mole of any substance is related to 6.022x10²³ particles and that 1 mole of the gas occupies 22.4 L at STP. Hence, we can find the volume with the following setup:
[tex]9x10^{23}molecules*\frac{1mol}{6.022x10^{23}molecules} *\frac{22.4L}{1mol} \\\\=33.5L[/tex]
Which can be rounded then to 33.6 L.
Learn more about ideal gases: brainly.com/question/8711877
Identify the following reactions as combination, decomposition, or combustion reactions
C7H8 + 9O2 → 7CO2 + 4H2O ______________
2NaHCO3 → Na2CO3 + H2O + CO2 ___________
CH4 → C + 2H2O ________________
P4O10 + 6H2O → 4H3PO4 ______________
FeSO4 → FeO + SO3 _______________
CaCO3(s) → CO2(g) + CaO(s) _________________
Answer:
[tex]{ \rm{C _{7} H _{8} + 9O _{2} → 7CO _{2} + 4H _{2}O : { \tt{combustion}}}} \\ \\ {\rm{2NaHCO _{3} → Na_{2}CO _{3} + H_{2}O + CO_{2} : { \tt{decomposition}}}} \\ \\ { \rm{CH _{4} → C + 2H _{2} O :{ \tt{decomposition}} }} \\ \\ { \rm{P _{4}O _{10} + 6H _{2}O → 4H _{3} PO _{10} :{ \tt{combination}} }} \\ \\ { \rm{FeSO _{4} → FeO + SO _{3} : { \tt{decomposition}} }} \\ \\ { \rm{CaCO _{3(s)} → CO _{2(g)} + CaO _{(s)} : { \tt{decomposition}}}}[/tex]
Fill in the reaction type and predicted products for:
C8H18 (l) + O2 (g) → ??
Type in the IUPAC name or formula for each product.
Write subscripts as normal numbers.
If there is no second product, type "nothing".
The reaction type is
Question Blank 1 of 3
.
The correct products are:
Question Blank 2 of 3
and
Question Blank 3 of 3
Answer:
nothing
Explanation:
What is the formula for iron (II) sulfate hexahydrate?
The formula for iron (II) sulfate hexahydrate
[tex]is[/tex]
FeH12O10S
Need Help ASAP Please! The Answer Needs To Be Numerical
A student ran the following reaction in the laboratory at 546 K:
COCl2 (g) CO (g) + Cl2 (g)
When she introduced 0.723 moles of COCl2 (g) into a 1.00 liter container, she found the equilibrium concentration of Cl2 (g) to be 3.38×10-2 M.
Calculate the equilibrium constant, Kc, she obtained for this reaction.
Kc =
This problem is providing an equilirium reaction with the initial concentration of COCl2 and the equilibrium concentration of Cl2 for us to calculate the equilibrium constant. At the end, the result is 0.00166.
Chemical equilibriumIn chemistry, not all chemical reactions turn out into completion yet reach a point of constant concentrations (conversion) called equilibrium. In such a way, since this problem is based on this phenomenom, we can start by setting up the equilibrium expression:
[tex]Kc=\frac{[CO][Cl_2]}{[COCl_2]}[/tex]
Where each concentration is at equilibrium. Now, since all these species are in 1:1 mole ratio, we can see that the cocentration that changed up to equilibrium is 3.38×10⁻² M (Cl2's concentration), and thus we can calculate Kc with:
[tex]Kc=\frac{(3.38x10^{-2}M)(3.38x10^{-2}M)}{(0.723M-3.38x10^{-2}M)}\\\\Kc=0.00166[/tex]
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Are oceans like giant swimming pools are they connected
Answer and Explanation:
Oceans are like giant swimming pools for marine life. Not really for people though. One difference that most swimming pools tend to have chlorine in them. If not, then they have salt water similar to an ocean. The chemical substance chlorine is not good for marine life at all, and isn't really good for people either.
But instead of chlorine, oceans have types of bacteria that aren't good for people either, especially if ingested in high amounts. So, if you've ever accidentally swallowed sea water and felt a little sick to your stomach, this could be why. They are similar though because they both have water and a form of bacteria.
They are not connected in a way of cycling water with each-other, but they do have similarities and differences as I had mentioned before.
Let me know if you have any more questions about this topic, I hope that this helps.