How many moles of h+ ions are present in 2.8 l of 0.25 m hydrobromic acid solution?

Answers

Answer 1

0.7 mol of H⁺ ions are present in 2.8 l of 0.25 m hydrobromic acid solution.

Hydrobromic acid is a strong acid, we can assume that all acid molecules dissociate completely to yield H+ ions and dissociated anion.

The equation for the dissociation of HBr :

                             Hbr (s) →  H⁺ (aq)  +  Br⁻ (aq)

moles H⁺ = ([tex]2800ml[/tex]) ( [tex]\frac{1L}{1000ML}[/tex])  ([tex]\frac{0.25 mol Hbr}{L}[/tex]) ( [tex]\frac{1 mol H}{1 mol Hbr}[/tex])

               = 0.7 mol

Therefore, 0.7 mol of H⁺ ions is present.

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Related Questions

Which term describes this reaction?

Answers

Answer:

addition polymerization

Explanation:

How many grams of butane were in 1. 000 atm of gas at room temperature?

Answers

The mass in grams of butane at standard room temperature is 53.21 grams.

How can we determine the mass of an organic substance at room temperature?

The gram of an organic substance at room temperature can be determined by using the ideal gas equation which can be expressed as:

PV = nRT

Pressure = 1.00 atmVolume = 22.4 LRate = 0.0821 atm*L/mol*KTemperature = 25° C = 298 k

1 × 22.4 L = n × (0.0821 atm*L/mol*K×  298 K)

n = 22.4/24.4658 moles

n = 0.91556 moles

Recall that:

number of moles = mass(in grams)/molar mass

mass of butane = 0.91556 moles × 58.12 g/mole

mass of butane = 53.21 grams

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The integrating center for the negative feedback loop that regulates body temperature is the.

Answers

Answer: Hypothalamus

Explanation:

The hypothalamus controls body temperature by sending signals to muscles, organs, glands, and other components of the nervous system when it becomes too low or too high. These structures then help in returning the body temperature to normal.

If you added the same amount of sugar to the same amount of water and boiled it, what would the boiling point be?

Answers

Answer:

Adding sugar to water will raise the boiling point and decrease the freezing point of water.

Explanation:

Hope this helps!

If same amount of sugar  added  to the same amount of water and boiled it then boiling point increases.

When sugar added to water it become solution.

Example: If water boils at 100°C then solution with 80%  sugar in 20% of water boils at 112°C.

Why boiling point of solution of sugar and water is higher then boiling point of water?

Since, sugar is non-volatile solute. So, when we boil the solution of sugar in water then water boils easily in low temperature but more  high temperature is required to boil sugar.

What is non-volatile solute?

The solute which has higher vapor pressure as compare to solution in which it dissolve is called non-volatile solute.

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Please help asap! giving brainliest to correct answer!!

which pair of compounds has the same empirical formula? (5 points)

select one:

a. c3h8 and c3h
b. c2h2 and c2h
c. c4h10 and c6h
d. c4h10 and c2h5

Answers

Answer:

D. C₄H₁₀ and C₂H₅

What is a empirical formula?

A chemical formula indicating the elements of a compound and their relative proportions, as (CH₂O)n.

Since an empirical formula indicates the ratio (proportions) of the elements in the compound, it can be used, along with the molar weight of the compound, to determine the molecular formula.

The empirical formula provides the smallest whole-number ratio among elements or compounds within a molecular compound. A compound is a chemical formed from atoms of different chemical elements.

Hence, Option D is correct.

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Determine if the following statement is true or false, and why. “A hypothesis can be proven true.”
A. False, it should read “A hypothesis can only be proven false.”
B. True
C. False, it should read “A hypothesis cannot be tested.”
D. False, it should read “A hypothesis can’t be proven true if it is falsifiable.”

Answers

it's true. answer is B.

a hypothesis is a stage before formation of theory. so when we put forward a hypothesis to prove something (in scientific observation) it can be proven true with the experiments conducted.

but of course it's can be proven wrong too, after the experiments conducted. then it is disregard.

a proven hypothesis (a true hypothesis)is the reason for theories.

Answer:

it's true. answer is B.

a hypothesis is a stage before formation of theory. so when we put forward a hypothesis to prove something (in scientific observation) it can be proven true with the experiments conducted.

but of course it's can be proven wrong too, after the experiments conducted. then it is disregard.

a proven hypothesis (a true hypothesis)is the reason for theories.

Explanation:

hope this helps :)

2. The table below shows the atomic numbers of elements of the periodic table represented by letters I to Q The letters are not the actual chemical symbols for the elements. Element J Atomic number www I 且 } T H 3 Lithiur K 7 Witrogen 8 Select two elements which belong ta Olygin The same period of the periodic table Jk The same group of the period table. Select the element which: twitt form a divalent andon Reacts murst vigorously with water. 9 N Home 10 (Ink (1mk bºr (Ink 12 May Nashy 13 Aluminian C 14 St Veer​

Answers

Explanation:

cudhdbsieehe eirbruwnee8ebeuw eodjsuww8

How many moles of propane
react when 294 g of CO2 form?

C3H8 +502 3CO2 + 4H₂O

?] mol C3H8

Answers

Starting mass: 294
Mass ratio: 3/5

Oxygen forms a number of compounds with sulfur, many of which are quite reactive. One such compound is 57.20 % by mass S . Calculate the number of grams of oxygen present in a sample of this compound that contains 40.00 grams of S . g O

Answers

The number of grams of oxygen present in a sample of this compound that contains 40.00 grams of S = 29.9g of oxygen

Calculation of quantity of Oxygen

The compound contains the following:

sulphur = 57.20%

Oxygen= 100 - 57.20 = 42.80%

If 57.20% of the sample contains 40g of sulphur then 42.80% of the sample will contain X.

Make X the subject of formula,

X = 42.8 × 40/57.20

X= 1712/57.20

X= 29.9g of oxygen

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A year has 365 day and a day has 24 hours. if an hour has 60 minutes and a minute has 60 seconds how many seconds are in a year

Answers

Answer:

31536000

Explanation:

There are 31536000 seconds in a day.

60s x 60min x 24hrs x 365 days = 31536000sec

An electrolytic cell differs from a voltaic cell because.

Answers

Answer: eletrolytic cell changes electrical energy to chemical energy

Which of the following questions would be answered by performing a scientific experiment?
A.
What type of food is the most enjoyable?
B.
What type of food is the most nutritious?
C.
What type of food looks the best?

Answers

the answer would be (B)

What are the five (5) things that can indicate a chemical change has occurred?
Write out the combinations that indicate a chemical change, explain how you know.

Answers

Answer: Bubbles, burning, odor, color change, and rusting.

Explanation: Chemical changes are changes to something that is irreversible.

In photosynthesis, plants use energy from the sun to produce glucose, c6h12o6 , and oxygen from the reaction of carbon dioxide and water.
6co2 + 6h2o --> c6h12o6 + 6o2
what mass, in grams, of glucose is produced when 3.00 mol of water react with carbon dioxide?

Answers

Answer: 324 g (to 3 sf)

Explanation:

Based on the coefficients of the equation, we know that when 3.00 mol of water is consumed, 3.00 mol of carbon dioxide is also consumed.

The atomic mass of carbon is 12.011 g/mol.The atomic mass of oxygen is 15.9994 g/mol.

Thus, the formula mass of carbon dioxide is:

[tex]6(15.9994)+12.011=108.0074[/tex] g/mol.

Thus, 3.00 mol has a mass of (108.0074)(3.00)=324 g (to 3 sf)

How many miles of silver will be generated if 1.30 miles of zinc is placed into silver nitrate solution

Answers

2.60 moles.

Zn (s) + 2 Ag+ (aq) --> 2 Ag (s) + Zn2+ (aq), each mole of zinc gives out two moles of silver. Therefore, 1.30 moles of zinc will displace 2.60 moles of silver. ( 1.30 × 2)

More about silver nitrate:

An inorganic substance with the chemical formula AgNO3 is silver nitrate. This salt serves as a flexible base for numerous different silver compounds, including those employed in photography. Compared to halides, it is far less light-sensitive. Lunar caustic was previously the name given to it since early alchemists referred to silver as luna and connected it to the moon.

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60 ml of a 1.0 m solution of h2so4 is mixed with distilled water to make 1 l of solution. what is the molarity

Answers

Answer:

0.057 M

Explanation:

To find the new molarity, you need to (1) find the moles (via the molarity equation using the old molarity and volume) and then (2) calculate the new molarity (via the molarity equation using the combined volume and old moles).

(Step 1)

60 mL / 1,000 = 0.06 L

Molarity (M) = moles / volume (L)

1.0 M = moles / 0.06 L

(1.0 M) x (0.06 L) = moles

0.06 = moles

(Step 2)

0.06 L + 1 L = 1.06 L

Molarity (M) = moles / volume (L)

Molarity = 0.06 moles / 1.06 L

Molarity = 0.057 M

What is a spring tide? When and why does it occur?

Answers

A spring tide occurs when there is a new or full moon in the solar system.

What is Spring tide?

This is the type of tide which occurs when the sun, moon and earth are in line and occurs between three to four times per year.

Lunar and solar tides also line up and reinforce each other to produce this type of tide.

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The energy of a photon from certain wavelength is 1.37 x 10^-20 j, what is the frequency in hz?

Answers

Answer:

frequency = 2.07 x 10¹³ Hz

Explanation:

To find the frequency of the photon, you need to use the following equation:

E = hv

In this formula,

-----> E = energy (J)

-----> h = Planck's Constant (6.626 x 10⁻³⁴ J*s)

-----> v = frequency (Hz)

Since you have been given values for two of the variables (in the correct units), you can plug them into the equation and simplify to find the frequency.

E = hv                                                       <----- General Equation

E = (6.626 x 10⁻³⁴ J*s)v                           <---- Plug in Planck's Constant

1.37 x 10⁻²⁰ J = (6.626 x 10⁻³⁴ J*s)v        <----- Plug in energy (given)

2.07 x 10¹³ = v                                        <----- Divide both sides by 6.626 x 10⁻³⁴

What is the theoretical yield of NaBr
when 2.36 moles of FeBr3 reacts?
2FeBr3 + 3Na2S → Fе₂S3 + 6NaBr
[?] mol NaBr
Round your answer to the hundredths place

Answers

The theoretical yield of NaBr given that 2.36 moles of FeBr₃ reacts is 7.08 moles

Balanced equation

2FeBr₃ + 3Na₂S → Fе₂S₃ + 6NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

How to determine the theoretical yield of NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

Therefore,

2.36 moles FeBr₃ will react to produce = (2.36 × 6) / 2 = 7.08 moles of NaBr

Therefore,

Thus, the theoretical yield of NaBr is 7.08 moles

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Answer:

7.08

Explanation:

What happens if you keep thermometer in deep freezer? Why?

Answers

Answer:

Nothing will happen until you remove the thermometer.

Explanation:If the thermometer is made of mercury in glass, nothing will happen….mercury does not freeze at the temperatures in the refrigerator…

nothing will happen,

Considering the combustion reaction of propane again, what mass of propane (C3Hg) is necessary to react with 4.53 g of oxygen? C3H8 +5023CO₂ + 4H₂O 0.0256 g C3H8 1.13 g C3H8 1.25 g C3H8 2.50 g C3H8

Answers

Answer:

1.25 g C3H8

Explanation:

edge lol

The bright-line emission spectrum of an element can best be explained by.

Answers

The light emitted by an element when its electrons return to a lower energy state can be viewed as a bright line emission spectrum.

What is Emission spectrum ?

The distribution of electromagnetic radiation released by a substance whose atoms have been excited by heat or radiation.

A spectroscope can be used to determine which frequencies have been emitted by a substance.

An emission line will appear in a spectrum if the source emits specific wavelengths of radiation.

This emission occurs when an atom, element or molecule in an excited state returns to a configuration of lower energy.

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the volume of a 300 L sample of CO2(g) at 2.30 atm is compressed to 29.6 L, what
is the new pressure at constant temperature and moles?

Answers

Answer:

23,31 atm

Explanation:

p1v1 = p2v2

2.3 * 300  = p2 *29.6

p2=23.31 atm

Which phrase describes a homogeneous catalyst?

Answers

Answer:

It is in the same phase as the reactants.

Explanation:

i took the test

Phase change involves changing states of matter (solid-liquid-gas). How do these three states of matter differ from each other? (on a molecular level)

Answers

solid : the molecules are tightly packed

liquid : the molecules have some space in them

gas : molecules can freely move around

What is the mass of the object on this triple beam balance?

Answers

A closer look at the triple beam balance shows that mass of the body is 52.5 g.

What is a triple beam balance?

The term triple beam balance refers to an equipment that is used to determine the mass of an object. It has three different degrees of calibration as shown.

In this case, if we look at the beam balance well, we can see that the mass of the body is 52.5 g.

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helpp im timed Part A

Fill a clear glass or resealable plastic bag three-fourths full with water. Place the pencil in the water, and hold it vertically without spilling. Look at the pencil from the side. Describe what you see.
Part B

Tilt the pencil from side to side while continuing to look at it from the side. Describe what you see.

Answers

Any deviation in the image of an object when light passing from one medium to other is assciated to the phenomenon of refraction.

What is refraction ?

It is the deflection from a straight path undergone by a light ray while passing from one medium (such as air) into another (such as glass) in which its velocity is different.


Basically, the light refraction gives the pencil a slight magnifying effect, which makes the angle appear bigger than it actually is, causing the pencil to look crooked.

After Looking at the pencil from the side of a clear glass or resealable plastic bag filled three-fourths with water, we will see the light bends around the pencil, causing it to look bent in the water.

When the pencil tilt from side to side, It looks so dramatically broken on looking at it from different angles.
We can magically “fix” the broken pencil by changing where the pencil is positioned in the glass.

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Answer:

Explanation:

Any deviation in the image of an object when light passing from one medium to other is assciated to the phenomenon of refraction.

What is refraction ?

It is the deflection from a straight path undergone by a light ray while passing from one medium (such as air) into another (such as glass) in which its velocity is different.

Basically, the light refraction gives the pencil a slight magnifying effect, which makes the angle appear bigger than it actually is, causing the pencil to look crooked.

After Looking at the pencil from the side of a clear glass or resealable plastic bag filled three-fourths with water, we will see the light bends around the pencil, causing it to look bent in the water.

When the pencil tilt from side to side, It looks so dramatically broken on looking at it from different angles.

We can magically “fix” the broken pencil by changing where the pencil is positioned in the glass.

PROBLEMS
1. What is the molarity of 4 grams of NaOH dissolved in 1 liter of solution?

2. What is the molarity of 4 grams of NaOH dissolved in 0.5 liter of solution

3. What is the molarity of 4 grams of NaOH dissolved in 0.1 liter of solution

4. Which of the 3 solutions above is more concentrated and why?​

Answers

Answer:

1.) 0.1 M

2.) 0.2 M

3.) 1 M

4.) Solution #3 is the most concentrated because it has the highest molarity. This solution has the largest solute to solvent ratio. The more solvent there is, the lower the concentration and molarity.

Explanation:

To find the molarity, you need to (1) convert grams NaOH to moles (via molar mass from periodic table) and then (2) calculate the molarity (via the molarity equation). All of the answers should have 1 sig fig to match the given values.

Molar Mass (NaOH): 22.99 g/mol + 16.00 g/mol + 1.008 g/mol

Molar Mass (NaOH): 39.998 g/mol

4 grams NaOH           1 mole
----------------------  x  ------------------  = 0.1 moles NaOH
                                 39.998 g

1.)

Molarity = moles / volume (L)

Molarity = (0.1 moles) / (1 L)

Molarity = 0.1 M

2.)

Molarity = moles / volume (L)

Molarity = (0.1 moles) / (0.5 L)

Molarity = 0.2 M

3.)

Molarity = moles / volume (L)

Molarity = (0.1 moles) / (0.1 L)

Molarity = 1 M

HELP FAST!!!!!!!
Which two groups have the same functional group?
O A. Amines and alcohols
B. Aldehydes and esters
C. Ketones and aldehydes
D. Esters and ethers

Answers

Answer:

C. Ketones and aldehydes

Explanation:

they are both carbonyl functional group

they both have a carbon-oxygen double bond

testosterone is an example of a ketone

formaldehyde is an example of a aldehyde

opentextbcca

wikipedia

Answer:

Ketones and Aldehydes

Explanation:

i just took tha test

A is a solution containing 3.5g of HX per dm-³. B is a solution containing 0.050moldm-³ of an hydrous sodium trioxocarbonate (IV) of solution 25cm³ portions of solution B required an average of 26.10cm³ of Solution A for complete neutralization. From this results, calculate

1. The Molar Concentration Of A

2. The Relative Molar Mass Of A

Equation For The Reaction 2HX + Na2CO3 ---> 2NaX + H2O + CO2

Brainliest!! ​

Answers

The Molar Concentration Of A =0.099 .

The Relative Molar Mass Of A = 35.0129 gm

Given,

Mass of HX = 3.5 g

Moles of solution B ([tex]Na_{2} CO_{3}[/tex]) = 0.05 moles

Volume of HX = 26.10 mL

Volume of Solution B = 25 mL

Molecular weight of solution B = 2(atomic weight of Na )+ atomic weight of C + 3(atomic weight of O)

                 = 2(23) + 12 + 3(16)

                 =106 gm

Equivalent weight of  [tex]Na_{2} CO_{3}[/tex] = molecular weight / 2 = 106 /2  =53 g

Mole = mass / molecular weight

∴0.05 = mass / 106

∴ mass = 5.3 gm [tex]Na_{2} CO_{3}[/tex]

Normality = mass ÷ (equivalent weight × volume of the solution in liter)

                = 5.3 ÷( 53 × 0.025)

                =4 N

So, by using formula ,

[tex]N_{1} V_{1} =N_{2} V_{2}[/tex]

[tex]N_{1}[/tex] = normality of solution B = 4 N

[tex]V_{1}[/tex] = volume of solution B = 25 mL

[tex]N_{2}[/tex] = normality of solution A = ? N

[tex]V_{2}[/tex] =Volume of solution A = 26.1 mL

∴ 4×25 = [tex]N_{2}[/tex] × 26.1

∴[tex]N_{2}[/tex] = 3.83 N

∴ normality of solution A = 3.83 N

from Formula of the normality we can find the equivalent weight of the A

Normality = mass of HX ÷ (equivalent weight × volume of the solution in liter)

3.83 = 3.5 ÷( equivalent weight × 0.0261)

equivalent weight = 35.0129 g

In case of HX the electron transfer is 1 ,so equivalent weight = molecular weight ; which is also termed as relative molar mass in given case.

∴The Relative Molar Mass Of A = 35.0129 g

Molar concentration = mass / molar mass

                               = 3.5 / 35.0129

                               = 0.099 mole

∴ The Molar Concentration of A  is 0.099 .

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if f(x)=-3x-5 and g(x)=4x-2 find (f-g) (x) need help on this question Answer all the questions. 1 The first three terms in a sequence of numbers, T1, T2, T3,... are given below: (a) T=1+3=4 T=4+5=9 T3=9+7=16 Find T4. Answer T4= Why might a poet use long lines?OA. To give the poem a sense of powerB. To speed up the pace of a poemOC. To provide a lot of informationOD. To draw attention to parts of the poem 5. Which of the following declined duringthe Renaissance?A. the power of individual monarchsB. the power of the churchC. the number of large citiesD. the number of explorers method to prevent school violence at the social level If the distance between two objects is cut in half, what happens to thegravitational force between them?A. It decreases to 1/2 its original magnitude.B. It decreases to 1/4 its original magnitude.OC. It increases to 4 times its original magnitude.D. It increases to 2 times its original magnitude. ASAP NOW! PLSS! I WILL MARK 5 STARS! PLSSS! thank you!! At noon, the temperatures in Portland, Maine and Phoenix, Arizona had opposite values. The temperature in Portland was lower than in Phoenix. What was the temperature in each city? Explain your reasoning. A 208.1 mL sample of gas exerts 574.6 mm Hg pressure at 44.4 C. What pressure does it exert at 68.1 C if the volume expands to 401.5 mL?a. 320b. 457c. 190d. 917 Which expression is equivalent to 364abc?2abc[4abc]4abc (35)8abc (3/bc)8abc(3/b) Gabrielle's age is three times Mikhail's age. The sum of their ages is 36. What is Mikhail's age? What evidence from the text supports the prediction that Mrs. Linde will get back together with Krogstad?Nora tries to convince Mrs. Linde not to go to Krogstad.Mrs. Linde does not understand Nora's reasoning.Mrs. Linde says that Krogstad would have done anything for her.Nora says that the wonderful and terrible thing must not happen. sketch the graph of y =sine3x Y=3x-7 complete the missing value in the solution to the equation (1, What is the age of consent?age at which someone can legally agree to sexual actsmaximum age at which someone can have sex with a minorage at which a person does not need parental permission to engage in sexnumber of years legally allowed between two people engaging in sexual acts to link the data from one table to another in an access relational database, a(n) ____ must be common to each table. distribute 5x(3x+7) help asap In this unit, you read a presidential speech, two poems, a memoir excerpt, short stories, and an editorial. In terms of what it shows about America, being American, and America's core values, with which work did you identify the most? That is, which work contained characters, events, or themes that you recognized and understood because of your own experiences as an American? Why do you think this work spoke to you as it did? With which work did you identify with the least? Why? Cite specific examples from the texts and your personal feelings or experiences to illustrate the points in your response. what kinds of investigations might have led to our current understanding of matter and energy? why is it important for scientists to use the same scientific method and consistent measurement units? Who is the president of the United States