A student prepared a solution by removing 40.0 mL of a 1.67 M HCl solution and transferring it to a 175.0 mL volumetric flask. She then filled the flask to the graduation line with deionized water. What is the concentration of the new solution
Answers
The concentration of the new solution is 0.381 M.
What is the molarity of the diluted solution?When a student transfers 40.0 mL of a 1.67 M HCl solution into a 175.0 mL volumetric flask and fills it to the graduation line with deionized water, a dilution occurs. To find the concentration of the new solution, we can use the dilution equation: M1V1 = M2V2, where M1 is the initial concentration, V1 is the initial volume, M2 is the final concentration, and V2 is the final volume. Rearranging the equation to solve for M2, we have M2 = (M1V1) / V2.
Substituting the given values, M1 = 1.67 M, V1 = 40.0 mL (which is equivalent to 0.040 L), and V2 = 175.0 mL (which is equivalent to 0.175 L), we can calculate the concentration of the new solution: M2 = (1.67 M * 0.040 L) / 0.175 L = 0.381 M.
Learn more about solution
brainly.com/question/1616939
#SPJ11
Related Questions
I need help please don’t troll or I’ll report.
Answers
Answer:
D.
Explanation:
Meets the qualifications!
What is the percent composition of sodium in Na3PO4? Express your answer to one decimal place. No units required.
Answers
Answer:
42.07%
Explanation:
Molar mass of Na3PO4 = 23×3 + 31 +16×4
= 69+ 31+64= 164 g/mol
Mass of Na in this compound is 69
Percentage of sodium in sodium phosphate = 69/ 164×100
Percentage of Na = 42.07%
Consider the rate law below.R=k[A][B]^2What effect does doubling the concentration of each reactant have on the rate?-The rate increases to two times the original rate.-The rate increases to four times the original rate.-The rate increases to six times the original rate.-The rate increases to eight times the original rate.
Answers
Answer
The rate increases to eight times the original rate.
Explanation
When the concentration of each reaction is doubled, the rate increases by eighth compared to the initial rate.
Example: Rate =k[A][B]^2
Lets assume : [A]1 = 0.1 and [A]2 = 0.2
[B]1 = 0.2 and [B]2 = 0.4
Initially: Rate = (0.1)(0.2)^2 = 4x10^-3
After doubling: Rate = (0.2)(0.4)^2 = 0.032
Divide the final answer by the initial one
=> 0.032/4x10^-3 = 8
Which of the following statements is true about polynucleotides? O DNA absorbs UV light, with a peak at 260 nm while RNA absorbs UV light, with a peak at 280 nm. O DNA and RNA absorb UV light, with a peak absorbance at 280 nm. O DNA and RNA absorb UV light, with a peak absorbance at 260 nm. O DNA absorbs UV light, with a peak at 280 nm while RNA absorbs UV light, with a peak at 260 nm.
Answers
The following statement is true about polynucleotides: DNA absorbs UV light, with a peak at 260 nm while RNA absorbs UV light, with a peak at 280 nm.
This statement is associated with the concept of nucleic acid structure.The nucleic acid is a macromolecule that is composed of repeating units called nucleotides. DNA and RNA are the two types of nucleic acid. A nucleotide consists of three components: a nitrogenous base, a sugar, and a phosphate group. DNA has deoxyribose sugar and RNA has ribose sugar. DNA is double-stranded while RNA is single-stranded.In terms of UV absorption, the aromatic nitrogenous base present in the nucleic acid absorbs the UV light. RNA has an absorbance peak at 280 nm while DNA has a peak at 260 nm. The absorption at 260 nm is attributed to the purine and pyrimidine bases present in the nucleic acid that have a peak absorbance at this wavelength. The absorbance at 280 nm is due to the presence of the aromatic amino acids like tryptophan and tyrosine present in the protein component of the nucleic acid. Therefore, the correct option is: DNA absorbs UV light, with a peak at 260 nm while RNA absorbs UV light, with a peak at 280 nm.
To know more about DNA , visit ;
https://brainly.com/question/2131506
#SPJ11
Consider the intermediate equations: 3 equations.
C(s) + O2(g) --> CO2(g) Delta H1 = -393.5 kJ
2CO(g) + O2(g) --> 2CO2(g) Delta H2 = -566.0 kJ
2H2O(g) --> 2H2(g) + O2(g) Delta H3 = 483.6 kJ
With the overall reaction:
C(s) + H2O(g) --> CO(g) + H2(g) Delta Hrxn = ?
QUESTION 1:
What must be done to calculate the enthalpy of reaction?
The first must be halved.
The first must be reversed.
The second must be halved.
The second must be reversed.
The third must be halved.
The third must be reversed.
QUESTION 2:
What is the overall enthalpy of reaction?
Delta Hrxn = ____ kJ
Answers
Answer:
C. The second equation must be halved
D. The second equation must be reversed
E. The third equation must be halved.
Delta Hrxn= 131.3 kJ
Explanation:
The correct answer is -582 KJ.
What is the enthalpy of reaction?
Enthalpy is the heat content of a system.The enthalpy change of a reaction is roughly equivalent to the amount of energy lost or gained during the reaction.A reaction is favored if the enthalpy of the system decreases over the reaction.What is the overall enthalpy of the reaction?
Equal to the sum of the standard enthalpies of the intermediate reaction steps is called overall enthalpyLearn more about enthalpy below,
https://brainly.com/question/27207707
#SPJ2
what best explains the cause of strong winds on a island?
Answers
If magnesium and nickel were used as electrodes to construct an electrochemical cell like the one shown at right, which metal would form the anode and which the cathode?
anode:
cathode:
Answers
Answer:
anode: magnesium
cathode: nickel
Explanation:
edg. 2021
Calculate the standard potential, ∘, for this reaction from its equilibrium constant at 298 K. X(s)+Y3+(aq)↽−−⇀X3+(aq)+Y(s)=6.90×10−8 X ( s ) + Y 3 + ( aq ) ↽ − − ⇀ X 3 + ( aq ) + Y ( s ) K = 6.90 × 10 − 8
Answers
Answer: The standard potential is -0.141 V
Explanation:
To calculate the Gibbs free energy for given value of equilibrium constant we use the relation:
\(\Delta G=-RTlnK\)
where,
= standard Gibbs free energy = ?
R = Gas constant = 8.314 J/Kmol
T = temperature = 298 K
K = equilibrium constant =
Putting values in above equation, we get:
\(\Delta G=40853J\)
Also \(\Delta G=-nFE^0\)
where n = no of electrons gained or lost = 3
F = Faradays constant = 96500 C
\(E^0\) = standard potential = ?
\(40853=3\times 96500\times E^0\)
\(E^0=-0.141V\)
Thus the standard potential is -0.141 V
PLEASE HELP PLS PLS PLS
Methane, CH4(g), and oxygen gas, O2(g) react to produce carbon dioxide, CO2(g), and water H2O(g). What volume of methane is required to react with oxygen to produce 32.5 L of carbon dioxide? *
a) 65.0 L
b) 48.8 L
c) 16.3 L
d) 32.5 L
Answers
Answer:
D)
Explanation:
CH4 + 2O2 = CO2 + 2H2O
1 (L CO2)= 32.5(L CO2)
1 (CH4) = 32.5 (L CH4)
I need some help with with question:
How could you prepare 100 ml of a 0.40 mol/L of MgSO4 solution from a stock solution of 2.0 mol/L MgSO4. And then how would u prepare it?
Answers
Answer:
C1V1=C2V2
C1 is 2.0mol/l
V1=?
C2=.4mol/L
V2=100ml or for this 0.1L
V1 is 20ml
Best way to prepare this is to measure out 20ml of the 2 molar solution and add 80mL to it to get to 100mL
Explanation:
The ____ allows you to compare the elements and understand their properties
Answers
Answer:
Periodic Table
hope this helps
have a good day :)
Explanation:
The periodic table allows you to compare the elements and understand their properties.
What is periodic table?Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
Elements present in the same group have same number of valence electrons and hence have similar properties while elements present in the same period show gradual variation in properties due to addition of one electron for each successive element in a period.
Learn more about periodic table,here:
https://brainly.com/question/11155928
#SPJ2
what mass of aluminum can be heated from 24 degrees Celsius to 65 degrees celsius using 430 j of heat
Answers
Mass of aluminum that can be heated is 11.65 gram
It is given that
initial temperature of aluminium = 24 degrees Celsius = 297 K
final temperature of aluminium = 65 degrees celsius = 338 K
heat gain = 430 j of heat
The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
Hence it is important as it will give an indication of how much energy will be required to heat or cool an object of a given mass by a given amount.
Q = mc∆T
Q = Heat energy
m = mass of substance
c = specific heat capacity of substance
∆T = change in temperature
So, specific heat capacity for aluminium is 0.9 J/g K
Q = mc∆T
430 = m x 0.9 x (338 - 297)
430 = m x 0.9 x 41
m = 430/0.9 x 41 = 11.65 gram
Hence, Mass of aluminum that can be heated is 11.65 gram
Learn more about Specific Heat capacity here:
https://brainly.com/question/21406849
#SPJ9
PLEASE HELP !!!
Which two elements have the same number of dots around their chemical symbols in their electron dot diagrams.
Answers
The two elements have the same number of dots around their chemical symbols in their electron dot diagrams are: (C). P and As
Meaning of chemical symbolsChemical symbol can be defined as a representation of an element using letters.
Chemical symbol are given to each element distinctively and this is an easier way to represent an element.
Some examples of chemical symbols are; O for oxygen, Zn for zinc, and Fe for iron etc.
In conclusion, The two elements have the same number of dots around their chemical symbols in their electron dot diagrams are: (C). P and As
Learn more about Chemical symbol: https://brainly.com/question/15045637
#SPJ1
Potassium nitrate is a component of black powder and a fertilizer. Its chemical formula is KNO3. Potassium nitrate is obtained by neutralizing which acid and alkali?
Answers
Answer:
Synthesis of Potassium Nitrate (KNO3)
When potassium hydroxide neutralizes nitric acid potassium nitrate is formed.
Answer:
Below.
Explanation:
Nitric acid and potassium hydroxide:
HNO3 + KOH ---> KNO3 + H2O.
A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mmHg. The flask is opened and more gas is added to the flask. The new pressure is 795 mmHg and the temperature is now 26 °C. There are now __________ mol of gas in the flask.
Answers
Answer:
The new moles of the gas in the flask is 2.13 moles.
Explanation:
Given;
number of moles of gas, n = 1.9 mol
temperature of the gas, T = 21 °C = 21 + 273 = 294 K
pressure of gas, P = 697 mmHg
volume of gas, V = ?
Apply ideal gas law;
PV = nRT
Where;
R is gas constant, = 62.363 mmHg.L / mol. K
V = nRT / P
V = (1.9 x 62.363 x 294) / 697
V = 49.98 L
New pressure of the gas, P = 795 mmHg
New temperature of the gas, T = 26 °C = 273 + 26 = 299 K
New moles of the gas, n = ?
Volume of the gas is constant because volume of the flask is the same when more gas was added.
n = PV / RT
n = (795 x 49.98) / (62.363 x 299)
n = 2.13 moles
Therefore, the new moles of the gas in the flask is 2.13 moles.
how can you get the bottom of the meniscus to the volumetric line of the pipette?
Answers
To get the bottom of the meniscus to the volumetric line of the pipette, tilt the pipette slowly and gently while keeping the top of the meniscus level. Make certain that you are gazing at the meniscus at eye level. Finally, add or subtract liquid as needed until the bottom of the meniscus reaches the volumetric line.
Follow these steps to get the bottom of the meniscus to the volumetric line of the pipette:
Fill the pipette with the liquid to be measured by dipping the tip of the pipette in the liquid and bringing it up to the required volume.
Hold the pipette upright and gently pour the liquid out until the meniscus (the curved surface of the liquid) is slightly above the pipette's calibration point.
To adjust the meniscus, use a clean and dry dropper to add or withdraw tiny drops of liquid from the pipette until the meniscus's bottom is at the pipette's calibration mark.
To maintain precision, hold the pipette upright during this operation and add or withdraw the liquid drop by drop.
Once the meniscus has reached the calibration point, you can transfer the liquid to the container of your choice or take any necessary measurements.
When correcting the meniscus, precision is essential since even little deviations might lead to erroneous results. It is also critical to use the correct pipette for the liquid being measured and to follow any special instructions or protocols supplied by your laboratory or project.
For more such questions on pipette, click on:
https://brainly.com/question/13273684
#SPJ4
cuantos gramos y moleculas de dioxido de carbono hay en 0.5 moles de dioxido de carbono
paso a paso
Answers
Answer:
metro= 22g
Explanation:
1. Which of the following is not homogeneous? (A) Brass
(B) Calamine lotion
(C) Dilute hydrochloric acid
(D) Air
Answers
1. Which of the following is not homogeneous? (A) Brass
(B) Calamine lotion
(C) Dilute hydrochloric acid
(D) Air
All of them are homogeneous, I looked them up individually, And it says they are all homogeneous.
Hope this helps and let me know if I'm wrong!
Please answer it in 1 hour Write explanation if it needed I’ll give you upvote immediately Don’t use excel to solve this question i In a bond amortization schedule, what does the book value mean?Describe in words. (ii) Consider a n-period coupon bond where the redemption amount, C may not be the same as the face amount, F. Using j and g to represent the yield rate per period and modified coupon rate per period respectively, show that,for k = 01,2,n, the book value at time k,B is B=C+Cg-jan-kj and the amortized amount at time k is ii Let K = Cu. The Makeham formula to compute the price of a bond is given by A verbal interpretation for K would be that K is the present value of the redemption value C.Provide a verbal interpretation for(C-K)
Answers
Answer:
(i) In a bond amortization schedule, the book value represents the remaining amount of the bond principal that hasn't been paid off at a given point in time. When a bond is first issued, its book value equals its face value. As payments are made over the life of the bond, a portion of these payments reduces the book value. By the end of the bond's life, its book value will be zero, as the entire principal will have been paid off.
(ii) The formula for the book value B at time k, where k is the number of periods elapsed, is B = C + Cg - jan-kj.
Here:
- C is the redemption amount,
- g is the modified coupon rate per period,
- j is the yield rate per period, and
- a_n-kj is the present value of an annuity immediate with n - k periods at the yield rate j.
This formula states that the book value at any time k is the redemption amount plus the present value of the future coupon payments (Cg), minus the present value of the annuity that represents the repayments of the bond (jan-kj).
The amortized amount at time k is the change in the book value from time k-1 to time k, plus the coupon payment at time k. It represents the portion of the bond's principal (and interest) that has been repaid up to time k.
(iii) If K is defined as the present value of the redemption value C, according to the Makeham formula, (C-K) would represent the difference between the redemption value of the bond and its present value. This difference is the amount of interest that will accumulate over the life of the bond. In other words, (C-K) can be interpreted as the total interest that the bondholder will earn from holding the bond until redemption, assuming that all coupon payments are reinvested at the yield rate j.
Explanation:
How many moles are in 2.8 g of Mg?
Answers
Answer:
2.8 mg ≈ 0.12 mol
True or False, The crust is made up of different plates that can slowly move around?
Answers
Answer:
True
Explanation:
There is such thing called tectonic plated
Answer:
True
Explanation:
The crust is made of plates called tectonic plates that move as fast as your finger nails grow, the amount of movement can create both tall and deep earth wonders. Such as the Mariana Trench and Mount Everest. And it causes earthquakes when they slide together.
Pls mark brainliest
Have a nice day!
1. How do scientific investigations begin?
conclusion
inquiry
testing
hypothesis
Answers
Answer:
Hypothesis is the answer
EASY QUESTION!!!! 12 POINTS!!!
Neutron____Neutron
push apart
pull together
Answers
Answer:
Neutron pull together Neutron
PLEASE HELP
The three main types of climate zones in order from coldest to warmest are
Answers
Answer:
Earth's climate can be divided into three major zones: the coldest polar zone, warm and humid tropical zone, and the moderate temperate zone.
Explanation:
Answer:
Tropical, Temperate, and Polar
Explanation:
With Tropical being the warmest and Polar being the coldest.
100 g of NH reacts with 78g O2 in the following equation: _NH3 +
_H20
_02
(Molar masses: NHs 17.031 g/mol, 02 31.998 g/mol, NO: 30.006 g/mol, H20: 18.015 g/mol)
a) Balance the equation
b) What is the limiting reactant
c) How many Lof H2O are produced, assuming it is water vapor at STP?
d) If 16.78 g of NO are produced, what is the percent yield? Is this efficient?
‚e) How much excess reactant is present at the end of the reaction? Write your answer in grams rounded to two decimal places.
Answers
100 g of NH reacts with 78 g oxygen in the balanced equation: 4NH₃ + 5O₂ → 4NO + 6H₂O.
a) The balanced equation is 4NH₃ + 5O₂ → 4NO + 6H₂O.
b) Moles of NH₃ = 100 g / 17.031 g/mol
= 5.877 mol
Moles of NO produced = 5.877 mol NH₃ × (4 mol NO / 4 mol NH₃)
= 5.877 mol
From 78 g O₂, calculate the amount of NO produced:
Moles of O₂ = 78 g / 31.998 g/mol
= 2.438 mol
Moles of NO produced = 2.438 mol O₂ × (4 mol NO / 5 mol O₂)
= 1.950 mol
Therefore, Oxygen is the limiting reactant because it produces less NO.
c) From the balanced equation, for every 5 moles of O₂ reacted, 6 moles of H₂O are produced.
Therefore, the mole ratio of H₂O to O₂ is 6:5.
Moles of H₂O produced = 1.950 mol NO × (6 mol H2O / 4 mol NO)
= 2.925 mol
At STP, 1 mole of gas occupies 22.4 L.
Volume of H₂O = 2.925 mol × 22.4 L/mol
= 65.52 L
d)The molar mass of NO is 30.006 g/mol, so 16.78 g of NO is equivalent to 0.559 mol.
Moles of NO produced = 2.438 mol O₂ × (4 mol NO / 5 mol O₂)
= 1.950 mol
Percent yield = (actual yield / theoretical yield) × 100%
= (0.559 mol / 1.950 mol) × 100%
= 28.7%
This is not very efficient.
e) Moles of NH₃ consumed = 1.950 mol NO × (4 mol NH₃ / 4 mol NO)
= 1.950 mol
Mass of NH₃ consumed = 1.950 mol × 17.031 g/mol
= 33.19 g
Excess NH₃ = initial amount - the amount consumed
= 100 g - 33.19 g = 66.81 g
The excess NH₃ is 66.81 g.
To learn more about the balanced equation, follow the link:
https://brainly.com/question/7181548
#SPJ1
in a bonding molecular orbital, the electron density is located * the nuclei which pulls the nuclei
Answers
In a bonding molecular orbital, the electron density is located between the nuclei, which pulls the nuclei closer together and stabilizes the bond.
In a bonding molecular orbital, the electron density is located between the nuclei which pulls the nuclei towards each other. This is because the electrons are shared by the two atoms, creating a bond that allows them to be attracted to each other. The more electron density there is between the nuclei, the stronger the bond will be. This is why atoms with similar electronegativities tend to form stronger bonds, as they share electrons more equally and have more balanced electron density between them.
To learn more about atoms click here
brainly.com/question/13973654
#SPJ11
What is the minimum hot holding temperature for fried chicken?.
Answers
Answer:
130
Explanation:
Maintain hot food at 135°F or above. Properly cooked roasts may be held at 130°F or above.
135°F is the minimum hot holding temperature for fried chicken. The most often used scales are indeed the Celsius scale.
What is temperature?Temperature is a physiological measure that quantifies our feelings of hotness and coolness. A thermometer is used to measure temperature.
Thermometers were calibrated in a variety of temperature scales that have traditionally been defined by various reference points including thermometric substances.
The most often used scales are indeed the Celsius scale, with the unit sign °C, the Fahrenheit level (°F), as well as the Scale parameter (K), with the latter being mostly used for scientific reasons. The kelvin is one of the International System of Units' seven basic units (SI). 135°F is the minimum hot holding temperature for fried chicken.
Therefore, 135°F is the minimum hot holding temperature for fried chicken.
To learn more about temperature, here:
https://brainly.com/question/23411503
#SPJ2
The mass ratio of hydrogen to oxygen in water (formula H20) is 0.126 g hydrogen for every 1 g of oxygen. In another compound of hydrogen and oxygen called hydrogen peroxide, the mass ratio of hydrogen to oxygen is 0.063 g hydrogen for every 1 g of oxygen. What is a possible formula of hydrogen peroxide?
Answers
Answer: H2O2
Explanation:
a sample of nickel contains 3.10 mol. to three significant figures, this sample contains g of nickel.
a. water
b. helium
c. molar
d. roses
Answers
A sample of nickel contains 3.10 mol. to three significant figures, this sample contains 182 g of nickel. The correct answer is option a.
Using the given information in the question, we can calculate the mass of nickel present in the given sample.
The number of moles of nickel present in the sample is given to be 3.10 mol.
The molar mass of nickel is 58.69 g/mol.
To calculate the mass of nickel present in the sample, we can use the formula:
Mass = Number of moles × Molar mass
Substituting the given values in the formula, we get:
Mass = 3.10 mol × 58.69 g/mol= 181.999 g
Mass ≈ 182 g
Therefore, the sample of nickel contains 182 g of nickel to three significant figures.
For more such questions on nickel, click on:
https://brainly.com/question/31216130
#SPJ11
The probable question may be:
a sample of nickel contains 3.10 mol. to three significant figures, this sample contains g of nickel.
a) 182 g
b) 152 g
c) 162 g
When determining whether a chemical change has taken place, you observe and look for several indicators. Which would be considered an indication that a chemical reaction has taken place?
a Heat is given off.
b Solid melts.
c An object has changed shape.
d Substance dissolved.
Answers
A chemical change occurs when there is a bond breaking or bond making. A phase change, change in phase and or change in shape does not make a chemical change. A chemical change can be indicated by the heat given off by a reaction or change. Thus, option a is correct.
What is chemical change?There are broadly two types of change occurs for a substance namely chemical change or physical change. A physical change is a change in state or phase involves no formation products or breaking of bonds. For example melting of a solid to liquid and boiling of liquid to gas etc.
In a chemical change there makes a bond breaking or making to form a new product. All chemical reactions such as combination reactions, decomposition, displacements etc. are chemical changes.
Every chemical change is associated with an enthalpy of heat energy that is absorbed or released by the system. Thus heat given off is an indication of a chemical change. Hence, option A is correct.
To find more about chemical change, refer the link below:
https://brainly.com/question/8159283
#SPJ1