Will mark BRAINLIEST. Molarity
Please no Bs answers. Only going to be reported.

If water is added to 145 mL of a 0.55 M KOH solution until the volume is 250 mL, what will the molarity of the diluted solution be?

What is the molarity of the solution that results from diluting 35.0 ml of a 9.02M solution to a new volume of 45.0 ml?​

Answers

Answer 1

We can use the equation for dilutions that relates concentration and volume:

[tex]M_1V_1=M_2V_2[/tex]

where M is the molarity, V is the volume, and 1 and 2 refer to the initial and final states of the solution, respectively. Here, we are given the molarity of the initial solution and the volumes of the initial and final (diluted) solutions. To find the final concentration (i.e., the molarity of the diluted solution), we would be solving for M₂:

[tex]M_2=\frac{M_1V_1}{V_2} = \frac{(0.55 \text{ M})(145 \text{ mL})}{250 \text{ mL}} \\ M_2 = 0.319 \approx 0.32 \text{ M}.[/tex]

The molarity is given to two significant figures as both our M₁ and V₂ are given to two significant figures.

Note: Although our volumes are in mL instead of L, we do not need to convert them to L for the purposes of our calculation since we would be multiplying our V₁ and V₂ by a common factor that would cancel out in division. All that matters is the ratio between the two volumes, which is the same whether the volumes are in mL or in L.

---

We follow the exact same procedure in the second question as we did in the first problem: solve for M₂ given M₁ = 9.02 M, V₁ = 35.0 mL, and V₂ = 45.0 mL:

[tex]M_2=\frac{M_1V_1}{V_2} = \frac{(9.02 \text{ M})(35.0 \text{ mL})}{45.0 \text{ mL}} \\ M_2 = 7.02 \text{ M}.[/tex]


Related Questions

Measurements show that unknown compound X has the following composition:
element mass %
carbon 74.8%
hydrogen 25.1%
Write the empirical chemical formula of X. please help

Answers

X is carbon and Jess

the empirical chemical formula of X is CH4

Explanation:Step 1: Imagine you have a sample of compound weighing exactly . Multiply the mass of this sample by the mass percents to find the mass of each element in the sample

Step 2: Divide the mass of each element by the element's molar mass to find the moles of each element in the sample. Remember to round your answers to the correct number of significant digits.  

Step 3: Divide the moles of each element by the the smallest number of moles of any element to find the mole ratio of elements in the sample.  

Step 4: Multiply the mole ratio by the smallest whole number that changes it into a whole number ratio to find the atom ratio of elements in the sample.

Note that the result of each multiplication must equal a whole number only within measurement uncertainty.  

The measurement uncertainty in this calculation comes from the measurement uncertainty of the mass percents given in the question. The mass percents each have significant digits. That means each mass percent has some measurement uncertainty in the third significant digit, and only the first two significant digits can be considered completely reliable.  

In Step 1 you multiplied each mass percent by something with zero uncertainty (the exactly you assumed your sample weighed), in Step 2 you divided by a measurement with more than significant digits (the molar mass of the elements), and in Step 3 you divided by a measurement with the same number of significant digits (the least number of moles of any element in the compound). None of these steps added to the measurement uncertainty of your calculation.  

Therefore, the measurement uncertainty in the final result of all your calculations is determined by the measurement uncertainty in the original mass percents and will be in the third significant digit. That means the result of each of the final multiplication steps must equal a whole number only to within the first two significant digits.  

The whole numbers in the last column of the table are and .  

Can anyone help me with this algebraic expression

(4a+3b)² (3a-4b)²​

Answers

Answer:

=144a⁴−168a³b−239a²b²+168ab³+144b⁴

Explanation:

=144a⁴−168a³b−239a²b²+168ab³+144b⁴

Answer:

[tex](4a + 3b)(4a + 3b)(3a - 4b)(3a - 4b) \\ {16a}^{2} + 12ab + {9b}^{2} + 12ab + {9a}^{2} + 12ab + 12ab + {16b}^{2} \\ {16a}^{2} + {9a}^{2} + {9b}^{2} + {16b}^{2} + 12ab + 12ab + 12ab + 12ab \\ {25a}^{2} + {25b}^{2} + 48ab[/tex]

An atom of an element always contains

Answers

Answer:

An atom of an element always contain three fundamental particles called electrons(e-) , neutron ( n zero) and protons ( p+)

An atom of an element always contains a proton, electron and neutron.

What is an atom ?

Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus. Only the most common type of hydrogen is neutron-free. Every solid, liquid, gas, and plasma is made up of atoms that are either neutral or ionized.

But when it comes to the word atom, we must go back to 400 B.C. Greece. And Democritus, a brilliant philosopher, proposed the Greek word atomos, which means uncuttable.

Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus.

Thus, An atom of an element always contains a proton, electron and neutron.

To learn more about an atom, follow the link;

https://brainly.com/question/29695801

#SPJ2

1 point
When substances that make up baking powder are mixed with water,
carbon dioxide gas is formed. This is an example of *
a nuclear reaction
a physical reaction
a change of state
a chemical reaction

Answers

It’s the last one Chemical Reaction

what is the meaning of flourish?

Answers

*Answer* : (of a person, animal, or other living organism) grow or develop in a healthy or vigorous way, especially as the result of a particularly favorable environment.

*For Example* :
"wild plants flourish on the banks of the lake"

PLZ HELP WILL BRAINLIEST
Balance the following equation: Fe2(SO4)3 + KOH --> K2SO4 + Fe(OH)3

Write the coefficients that you decide to balance the equation like this 3, 4, 3. If you do not add a coefficient in front of an element or compound, use a 1 in your answer. For instance the for this balanced equation: 2H2 + O2 --> 2H2O you would write your answer: 2, 1, 2

Answers

Answer:

6,3,2

Explanation:

Fe2(SO4)3 + 6 KOH = 3 K2SO4 + 2 Fe(OH)3

3) Find the mass, in grams, of 5.08 mol Ca(NO3)2

Answers

Answer:

833.12g

Explanation:

Use the mole=mass/mr equation (rearrange this to find mass)

Mr= 164

So, 5.08 x 164 = 833.12g

The mass in grams of 5.08 mol Ca(NO3)2 is =833.12g

What is a mole?

The mole is the amount of substance of a gadget which includes as many standard entities as there are atoms in zero.012 kilogram of carbon 12;

Molecular mass of Ca(NO3)2 = 40+(14+48)*2

                                                =40+124

                                                = 164 g

1 mole of Ca(NO3)2 = 164 g

5.08 mole of = 5.08*164g

                         =833.12g

Learn more about mole here:-https://brainly.com/question/15356425

#SPJ2

PLEASE HELP MEEE THIS IS FOR a gradE AND IF I FAIL I FaIL THIS CLASs HELP ME

Answers

Answer:

stream

Explanation:

because a stream goes into a lake

Answer:

D) Stream

Explanation:

HELP PLEASE
What does the 2 mean in the formula of calcium nitrate? What does the 3
mean?

Answers

Answer:

Calcium nitrate is an inorganic compound with the chemical formula Ca(NO3)2. ... It is a nitrate salt of Calcium which contains calcium and nitrogen and oxygen. Calcium nitrate is a white or whitish-grey coloured granular solid which absorbs moisture from the air and is usually found as a tetrahydrate compound Ca(NO3)2.

Explanation:

please help! Will give Brainliest!

Answers

the answer is c, hope you did good on whatever this is

Answer: the answer is c

Explanation:

also, is that canvas? sajdasds

What is the percent composition of each element in the compound below:
CrPO4

Answers

Chromium phosphate pentahydrate

The chemical equation, Cr + Fe(NO3)2 → Fe + Cr(NO3)3, is an example of which type of reaction?

Answers

Answer:

Redox type

Explanation:

The reaction is:

2Cr +  3Fe(NO₃)₂ → 2Fe + 2Cr(NO₃)₃

2 moles of chromium can react to 3 moles of iron (II) nitrate in order to produce 2 moles of iron and 2 moles of chromium nitrate.

If we see oxidation state, we see that chromium changes from 0 to +3

Iron changed the oxidation state from +2 to 0

Remember that elements at ground state has 0, as oxidation state.

Iron is being reduced while chromium is oxidized. Then, the half reactions are:

Fe²⁺  +  2e⁻ ⇄  Fe    (Reduction)

Cr ⇄ Cr³⁺  +  3e⁻    (Oxidation)

When an element is being  reduced, while another is being oxidized, we are in prescence of a redox reaction.

If combining cation A with a +3 charge and anion X with a -3 charge, how would we write the compound?
O AX
O A3X3
O 3AX

Answers

Answer: it’s not A3X3

Explanation:

1. AX

For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.If a cation A carries +3 charge and an anion X carries -3 charge, the compound so formed is AX. Since the charges gets cancelled out.For example: consider aluminum phosphate, aluminum carries +3 charge and phosphate carries -3 charge, the molecular formula for the compound will be AlPO₄.

Learn more:

brainly.com/question/11164440

the indicated gene codes for a protein made up of the amino acid

Answers

Answer:

N/A

Explanation:

Is this a true or false answer or.....?

A balloon occupies 175 cm at 25.0 C. What volume will it occupy at 42.5 °C?

Answers

175 cm³ instead of 175 cm.

Answer:

297.5 cm³

Explanation:

From the question;

Initial volume; V1 = 175 cm³

Initial temperature; T1 = 25°C

Final temperature; T2 = 42.5°C

From Charles law we can find the volume V2 from the equation;

V1/T1 = V2/T2

Making V2 the subject gives;

V2 = V1 × T2/T1

V2 = (175 × 42.5)/25

V2 = 297.5 cm³

Name the following cycloalkane:

CH2CH2CH2CH3
A. butylcyclohexane
B. butylcyclopentane
C. propylcyclohexane

Answers

Answer:

The answer for this question is A. butylcyclohexane

Explanation:

Choose letter A

You welcome have a nice day.

Name of the given compound is butyl cyclohexane.

What are cyclo alkanes?

Cyclo alkanes are those organic compounds in which alkanes are present in the cyclic form.

In the nomenclature of cyclo alkane, name of the substitute is put before the name of the main ring. In the given structure number of carbons in ring is 6 so that given cycloalkane is cyclohexane and butyl group is attached as substitute. So name of the given compound is butyl cyclohexane.

Butyl cyclopentane is wrong because 6 carbons are present in ring.Propylcyclohexane is also wrong because 4 carbons are attached in the ring.

Hence name of the compound is butyl cyclohexane.

To know more about cycloalkanes, visit the below link:
https://brainly.com/question/25058711

#SPJ2

Which of these forces does not act over a distance?
A. Friction
B. Electric
C. Magnetic
D. Gravitational

Answers

A. Friction is the answer

what does 3 hour change mean?​

Answers

Answer:

like what happens In 3 hours

What’s is CO written?

Answers

Answer:

CO is a chemical formula that contains one carbon atom (C) and one atom of oxygen (O). Altogether, CO translates to "carbon monoxide."

Explanation: Why monoxide and not dioxide? Well, the prefix mono means "one," and di means "two." Since there is only one oxygen atom (-oxide), then it must be monoxide! Voila!!

Can you bond 2 silicon atoms (Si) together to form a complete (real) molecule? Explain your reasoning

Answers

Answer: no

Explanation: because silicon cannot share over 3 bonds

Please help me with dis

Answers

Answer:

c

Explanation:

How many moles of carbon dioxide are produced when 5.12 moles of glucose undergoes a combustion reaction?

Answers

Answer: 30.72 moles of [tex]CO_2[/tex] will be produced from 5.12 moles of glucose.

Explanation:

The balanced chemical equation for combustion of glucose is:

[tex]C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O[/tex]  

According to stoichiometry :

1 moles of glucose produce =  6 moles of [tex]CO_2[/tex]

Thus 5.12 moles of glucose produce =[tex]\frac{6}{1}\times 5.12=30.72moles[/tex]  of [tex]CO_2[/tex]

Thus 30.72 moles of [tex]CO_2[/tex] will be produced from 5.12 moles of glucose.

Carbon is one of a few elements that bonds to itself. The scientific term for this is

Answers

Answer:

Alkanes

Explanation:

Explanation:

The answer is Alkanes.Alkanes are compound that consists entirely of atoms of carbon and hydrogen joined to one another by single bonds

Think of the of the body that we need in order to do things like walk, run etc. What systems are these? How do they work together so you can do these activities?

Answers

Answer:

I dont get this

Explanation:

Which date has the longest daylight and the shortest darkness

Answers

The Winter Solstice.

Can you help me plz I think it’s b or c

Answers

i think its C pls dont get mad if it is wrong

The answer is very much C!!!!

Which is an example of a medicine that is made up of synthetic materials?
Fish Oil
Aspirin
Aloe Vera
Fresh water

Answers

Answer: Aspirin

Explanation:

What are the charges on ions of Group 1A, Group 3A (aluminum), and Group 5A?

Answers

Answer:

Group 1A: 1+

Group 3A: 3+

Group 5A: 3+ or 5+

Explanation:

If I had 50 graham cracker squares, 15 marshmallows, and 100 little
chocolate pieces, how many total s'mores could I make before I ran out of
ingredients?

Answers

The answer the the question is 22

-->
Give the products of this neutralisation reaction: Sulfuric acid + magnesium hydroxide

Answers

Magnesium combined with sulfuric acid produces magnesium sulfate and hydrogen gas.

Other Questions
in which of these areas would you be MOST likely to find the HIGHEST concentration of people who follow Islam?-)A)2B34D5 Complete the sentences saying where the following students are in the school building, using the verb estar. 1. T practicas deportes. T ___________________________en _________________________________ . 2. Mis amigos estudian. Mis amigos ___________________________en _________________________________ . 3. Hablamos con el director de la escuela. Nosotros ___________________________en _________________________________ . 4. Yo como comida. Yo___________________________en _________________________________ . 5. l va a la clase de arte. l ___________________________en _________________________________ . PLease HELP How many molecules of CO2 are there in 55 grams of CO2? NEED HELP ASAP. WILL GIVE BRAINLIEST How do limited resources affect a nation's decision to engage in international trade? Is this independent or dependent clause A or B Simplify-36 + x < 8 What is the relationship between 30 hours and 15 hours? If you worked on an assembly line, what might a typical day be like for you? 1 You'd spend your day in the fields, picking cotton2 You'd perform the same task over and over 3 You'd work deep underground, mining coal 4 You'd spend your day building different parts of automobiles question 4. The Civil Rights movement changed from peaceful and passive to more violent for what reason? Which of the following types of models could be used to represent a cell?a.idea modelb.physical modelc.computer modeld.all of the above How does a difference in electronegativity determine the type of bond betweenelements? What is the area of the regular pentagon below? A sodium vapor lamp omit waves with the frequency of 5.26x10^14 Hz. What is the wavelength of light? Can someone kindly give me some pictures of the classic harley quinn please? tysmm(art class) QUESTION 5 of 10: Preparing a budget is: a) An ongoing processb) Something you only have to do once in your lifetimec) Not an effective way to save moneyd) A method for calculating take-home pay If your thesis statement was: Although Frankenstein had a duty to his creation, he felt his greater duty was to humankind. Which of the following quotes will you choose as evidence to support your thesis?A. I refused, and I did right in refusing, to create a companion for the first creature. He showed unparalleled malignity and selfishness in evil;.B. For this I had deprived myself of rest and health.C. Oh! Be men, or be more than men. Be steady to your purposes and firm as a rock.D. Seek happiness in tranquility and avoid ambition. Choose a reasonable explanation to account for the differences. There may be more than one possible reason that makes sense, just select one of them. A. It is possible not all of the water was evaporated from the sand, causing the recovered mass to be higher. B. It is possible not all of the water was evaporated from the sand, causing the recovered mass to be lower. C. While drying the NaCl, the liquid boiled and some splattered out of the evaporating dish, causing the recovered mass to be lower D. While drying the NaCl, the liquid boiled and some splattered out of the evaporating dish, causing the recovered mass to be higher. E. There was no difference in recovered and original mass, so there is no difference to account for. In the masque of the red death the stranger symbolizes..?A. The red death B. SleepC. Hope A microscope has a 4x ocular lens and a 10x objective, what is this microscope'stotal magnification?4x14x40x400x micheal has 3 quarters, 2 dimes, and 3 nickels