How many grams of MgSO4 should Naomi weigh out to prepare 0.250 L of a 1.25 M solution?

Answers

Answer 1

Answer:

Mass of MgSO₄ = 37.61 g

Explanation:

Given data:

Mass of MgSO₄ needed = ?

Volume of solution = 0.250 L

Molarity of solution = 1.25 M

Solution:

Formula;

Molarity = number of moles of solute / L of solution

Now we will put the values in formula:

1.25 M = number of moles of solute / 0.250 L

Number of moles of solute = 1.25 M ×0.250 L

             (M = mol/L)

Number of moles of solute = 0.3125 mol

Mass = number of moles × molar mass

Mass = 0.3125 mol  × 120.366 g/mol

Mass = 37.61 g


Related Questions

Solid calcium chlorate decomposes to form solid calcium chloride and oxygen gas.

Write the balanced chemical equation for the reaction described. Phases are optional.

equation:

Answers

Answer:

Ca(ClO₃)₂(s)      →      CaCl₂(s) + 3O₂(g)

Explanation:

Chemical equation:

Ca(ClO₃)₂(s)      →      CaCl₂(s) + O₂(g)

Balance chemical equation:

Ca(ClO₃)₂(s)      →      CaCl₂(s) + 3O₂(g)

Step 1:

Ca(ClO₃)₂(s)      →      CaCl₂(s) + O₂(g)

Left hand side                     Right hand side

Ca = 1                                     Ca = 1

Cl = 2                                     Cl = 2

O =  6                                     O = 2

Step 2:

 Ca(ClO₃)₂(s)      →      CaCl₂(s) + 3O₂(g)

Left hand side                     Right hand side

Ca = 1                                     Ca = 1

Cl = 2                                     Cl = 2

O =  6                                     O = 6

How many of the 7 traits of living things have

Answers

Answer:

What do you mean by this?

Explanation:

How can a shoreline be destroyed by a Hurricane?

Answers

Answer:

costal erosion

Explanation:

can cause erosion

Answer:

The water piles up with nowhere to go but onto land when it gets to the coast. The rising water, called storm surge, can submerge low-lying areas and towns along the coast. Combined with the crashing waves of the storm, the storm surge can cause demolishing docks, houses, roads, and erode beaches.

Explanation:

What is the Kc equilibrium-constant expression for the following equilibrium? S8(s) + 24F2(g) 8SF6(g)

Answers

Answer:

[tex]Kc=\frac{[SF_6]^8}{[F_2]^2^4}[/tex]

Explanation:

Hello.

In this case, for the undergoing chemical reaction:

[tex]S_8(s) + 24F_2(g) \rightleftharpoons 8SF_6(g)[/tex]

We consider the law of mass action in order to write the equilibrium expression yet we do not include S8 as it is solid and make sure we power each gaseous species to its corresponding stoichiometric coeffient (24 for F2 and 8 for SF6), thus we obtain:

[tex]Kc=\frac{[SF_6]^8}{[F_2]^2^4}[/tex]

Best regards!

where in water is being converted into a gaseous form?
evaporation
condensation
transportation
precipitation ​

Answers

Answer:

It's called Evaporation.

Help plzzzzzzzzzzzzzzz

Answers

Answer:

um wheres thepassage?

Explanation:

we cant see the passage man lol

When 435 J of heat is added to 3.4 g of olive oil that's at 21 Deg C, it's
temperature increases to 85 Deg C. Calculate the specific heat of Olive oil? Show work

Answers

Answer:

k Nishant

Explanation:

i don't know sorry but u can search in google

When nitrogen, oxygen, fluorine, sodium, magnesium and aluminum ionize, they all will have:
a. different electron configuration from each other.
b. an unchanged electron configuration.
c. the same charge.
d. the same electron configuration (isoelectronic) as neon.
[Definition: The word isoelectronic means that when you write out the electron configuration they are the same. An exam would be He and Li whereby both of them have 2 electrons and therefore they are both are 1s2 in their electron configurations.]

Answers

Answer:

the same electron configuration (isoelectronic) as neon.

Explanation:

The electron configuration refers to the distribution of electrons of an atom or molecule in atomic or molecular orbitals. Electronic configuration is also known as an electronic structure.

When nitrogen, oxygen, fluorine, sodium, magnesium and aluminum ionize, they all will have the same electron configuration (isoelectronic) as neon.

Use the periodic table to identify the chemical symbol or name for each element below.

zirconium:
zr
rhenium:
re
: As
: K
tin:
yttrium:
: Yb

Answers

Answer:

zirconium is Zr

rhenium is Re

As is arsenic

K is potassium

tin is Sn

yttrium is Y

ytterbium is Yb

Explanation:

With the help of the periodic table, the identification of the chemical symbol or name for each element is represented as follows:

Zirconium: Zr. Rhenium: Re. Arsenic: As.Potassium: K.Tin: Sn. Yttrium: Y. Ytterbium: Yb.

What are the chemical elements?

Chemical elements may be defined as any type of substance that cannot be further decomposed into simpler substances through the utilization of other ordinary chemical processes or external factors. These elements possess specific physical as well as chemical properties distinctly.

In the modern periodic table, each element is arranged on the basis of its increasing atomic number. Each element possesses its unique symbol, atomic mass, and physical properties like boiling points, melting points, density, etc.

Therefore, with the help of the periodic table, the identification of the chemical symbol or name for each element is well represented above.

To learn more about the Periodic table, refer to the link:

https://brainly.com/question/15987580

#SPJ2

State Hess' law of constant heat summation.
(b) Calculate the enthalpy of formation of CH4 from the following data:
i) C(s) + O2(g) → CO2(g); ∆H = -393.7 kJ/mol
ii) H2(g) + 1⁄2 O2(g) → H2O(l); ∆H = -285.8 kJ/mol
iii) CH4(g) + 2 O2(g)→ CO2(g) + 2H2O(l); ∆H = -890.4 kJ/mol

Answers

Answer:

-74.6 kj/mol

Explanation:

you can see the answer at the pic

What do you need to measure the amount of energy in food

Answers

Answer:

u measure how much power it has

Explanation:

for example u can power a light bulb woth it if u can it was 100eg energy

Answer each of the following questions with increases, decreases, or does not change.
a) If the intermolecular forces in a liquid increase, the normal boiling point of the liquid increases .
b) If the intermolecular forces in a liquid increase, the vapor pressure of the liquid does not change .
c) If the surface area of a liquid increases, the vapor pressure increases .
d) If the temperature of a liquid decreases, the equilibrium vapor pressure increases .
Drag and drop your selection from the following list to complete the answer:
does not change decreases increases

Answers

Answer:

a) increases

b) decreases

c) does not change

d) increases

Explanation:

The vapour pressure of a liquid is dependent on;

I) the magnitude of intermolecular forces

II) the temperature of the liquid

Hence, when any of these increases, the vapour pressure increases likewise.

Similarly, the boiling point of a liquid depends on the magnitude of intermolecular forces present because as intermolecular forces increases, more energy is required to break intermolecular bonds.

Lastly, increase in surface area of a liquid does not really affect it's vapour pressure.

Consider the reaction of zinc metal with hydrochloric acid:
Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g).

If 29.39 × 1024 atoms of zinc completely reacted with hydrochloric acid, how many moles of hydrochloric acid must have reacted?

Do NOT include units in your entry. Report your answer with 3 SFs.

______________________ moles of HCl

Answers

Answer:

6.054×10²⁵

Explanation:

1)find number of moles of zinc

2)multiply the mole of zinc with 2

3)use the formula mol = number of particle/ avogadro constant

Total, 97.64 moles of hydrochloric acid (HCl) must have reacted.

To determine the number of moles of hydrochloric acid (HCl) that reacted, we first need to find the molar ratio between zinc (Zn) and hydrochloric acid (HCl) from the balanced chemical equation:

Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g)

From the equation, we see that 1 mole of Zn will reacts with 2 moles of HCl.

Given that 29.39 × 10²⁴ atoms of zinc reacted, we need to convert this quantity to moles. We can do this by using Avogadro's number:

1 mole of any substance = 6.022 × 10²³ atoms

Number of moles of zinc reacted = (29.39 × 10²⁴ atoms) / (6.022 × 10²³ atoms/mol)

Number of moles of zinc reacted ≈ 48.82 moles (rounded to 3 significant figures)

Now, using the molar ratio from the balanced equation, we can determine the number of moles of hydrochloric acid (HCl) that reacted:

Number of moles of HCl reacted = 2 × Number of moles of zinc reacted

Number of moles of HCl reacted ≈ 2 × 48.82 moles

≈ 97.64 moles

Therefore, approximately 97.64 moles of hydrochloric acid (HCl) must have reacted.

To know more about hydrochloric acid here

https://brainly.com/question/14519330

#SPJ2

What is the approximate vapor pressure when the liquid water boils at about 50°C?

380 mmHg
760 mmHg
100 mmHg
5 mmHg

Answers

Answer:

380

Explanation:






Which number represetns a coefficient?
2
3
4
7

Answers

4 is the number that represents a coefficient

Which of the following are mole ratios from the balanced chemical equation below? Select all that
apply.
FeCl3 + 3HF - FeF3 + 3HCI
1 mole HF/1 mole HCI
3 mole HF/1 mole FeF3
1 mole FeCl3/3 mnole HF
3 mnole HF/1 mole FeCl3

Answers

The mole ratio of the given reaction is 1 mole HF/1 mole HCI; option A.

What are mole ratios?

Mole ratios are ratios of the moles of reactants and products in a balanced chemical equation of a reaction.

Mole ratios are obtained from balanced chemical equations.

The balanced equation of the reaction is given below:

FeCl3 + 3HF ----> FeF3 + 3HCI

The mole ratio of the given reaction is 1 mole HF/1 mole HCI.

Learn more about mole ratio at: https://brainly.com/question/19099163

#SPJ1

Why aren’t two hydrogen atoms bonded together considered a compound? Explain.

Answers

Answer:

Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms. There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds.

What is the mass in grams of 2.4 x 10-2 mol K2SO4

Answers

Answer:

4.18 grams

Hope it helps!

A 7.27-gram sample of a compound is dissolved in 250. grams of benzene. The freezing point of this solution is 1.02°C below that of pure benzene. What is the molar mass of this compound? (Note: Kf for benzene = 5.12°C/m.) Ignore significant figures for this problem. Group of answer choices 36.5 g/mol 146 g/mol 292 g/mol 5.79 g/mol 73.0 g/mol

Answers

Answer:

The correct answer is 146 g/mol

Explanation:

Freezing point depression is a colligative property related to the number of particles of solute dissolved in a solvent. It is given by:

ΔTf = Kf x m

Where ΔTf is the freezing point depression (in ºC), Kf is a constant for the solvent and m is the molality of solution. From the problem, we know the following data:

ΔTf = 1.02ºC

Kf = 5.12ºC/m

From this, we can calculate the molality:

m = ΔTf/Kf = 1.02ºC/(5.12ºC/m)= 0.199 m

The molality of a solution is defined as the moles of solute per kg of solvent. Thus, we can multiply the molality by the mass of solvent in kg (250 g= 0.25 kg) to obtain the moles of solute:

0.199 mol/kg benzene x 0.25 kg = 0.0498 moles solute

There are 0.0498 moles of solute dissolved in the solution. To calculate the molar mass of the solute, we divide the mass (7.27 g) into the moles:

molar mass = mass/mol = 7.27 g/(0.0498 mol) = 145.9 g/mol ≅ 146 g/mol

Therefore, the molar mass of the compound is 146 g/mol

how many moles of h2 can be made from the complete reaction of 3.5 moles of al?
Given: 2Al+6HCL 2Alcl3+3h2

Answers

Answer:

From the given equation, we can see that for every 2 moles of Al, we get 3 moles of H2

So, we can say the the number of moles of H2 is 3/2 times the number of moles of Al

We are given the number of moles of Al and we have to find the number of moles of H2

We have deduced the relationship:

Moles of Al * 3 / 2 = Moles of H2

Replacing the variables with given values

3.5 * 3 / 2 = Moles of H2

Moles of H2 = 5.25 moles

An element that reacts with oxygen to form XO2 compounds and with chlorine to form XCI4 compounds???

Answers

Answer:

An element X reacts with oxygen to form XO

and with chlorine to form XCl

. XO

is a white solid that melts at high temperatures (above 1000 degrees C). Under usual conditions, XCl

is a colorless liquid with a boiling point of 58 degrees C.

Explanation:

How many grams of NO2 would be formed from 1.0 mole of NO and excess of O2?

Answers

Answer:

Mass = 46 g

Explanation:

Given data:

Number of moles of NO = 1.0 mol

Amount of O₂ = excess

Mass of NO₂ formed = ?

Solution:

Chemical equation:

2NO + O₂    →    2NO₂

Now we will compare the moles of No with NO₂.

                  NO           :           NO₂

                    2            :            2

                     1            :           1

Mass of NO₂ in gram:

Mass = number of moles × molar mass

Mass = 1 mol ×46 g/mol

Mass = 46 g

an atom contains 31 protons,39neutrons and 31 electrons.Identify the mass number of this atom​

Answers

Answer:

Atomic mass =70

Explanation:

Mass number is total protons +total neutrons

. A nail is hammered into a piece of wood. *

Answers

And then you jam your finger

Answer:

and now you have a nail in your wood :)

True or False: Particles that are moving faster have a higher temperature

Answers

Answer:

true

Explanation:

I'm not sure why cause I dont know how to explain but it's TRUE

Answer:

True  

Explanation:

The particles moving faster in a substance the hotter it gets.

Why can we hear different radio stations?

Answers

Your radio picks up those radio waves and channels them into electric circuits in your radio that convert them into sounds you can hear.

Why are noble gases nonreactive?
A
Their melting points are too high to react.
B
They have 8 valence electrons making them inert, so they do not react.
C
They have 8 valence electrons, making them too dense to react.
D
They have 18 valence electrons, making them over expanded, so they cannot react.

Answers

Answer:

B

Explanation:

Answer:

B

Explanation:

Halfnium has three isotopes; 74% Hf-180, 17% Hf -176, and 9 % Hf- 177. Calculate the mass of Halfnium.

Answers

Answer:

179.05 g/mol

Explanation:

simple called the percentage of the molecular mass of each isotope and add them together. their sum is the mass of Halfnium.

thus

Hf --- 74/100 × 180 = 133.2

Hf --- 17/100 × 176 = 29.92

Hf --- 9/100 × 177 = 15.93

total mass = 133.2+29.92+15.93

= 179.05 g/mol

find the frequency factor at 273 k for the decomposition of nitrogen dioxide, which has the reaction: 2no2(g) → 2no(g) + o2(g) the activation energy of the reaction is 111 kj/mol and the rate constant is 1.0 x 10-22 s-1. round to two decimal places.

Answers

Answer:

0.17 s⁻¹

Explanation:

Step 1: Given data

Temperature of the reaction (T): 273 KActivation energy (Ea): 111 kJ/molRate constant (k): 1.0 × 10⁻²² s⁻¹Ideal gas constant (R): 8.314 × 10⁻³ kJ/mol.KFrequency factor (A): ?

Step 2: Calculate the frequency factor

We will use the Arrhenius equation.

ln k = lnA - (Ea/R).(1/T)

lnA = ln k + (Ea/R).(1/T)

lnA = ln 1.0 × 10⁻²² s⁻¹ + [(111 kJ/mol)/(8.314 × 10⁻³ kJ/mol.K)].(1/273K)

A = 0.17 s⁻¹

Calculate the volume of the gas, in liters, if 1.75 mol has a pressure of 1.28 atm at a temperature of -7 ∘C

Answers

Answer:

A sample of an ideal gas has a volume of 2.21 L at 279 K and 1.01 atm. Calculate the pressure when the volume is 1.23 L and the temperature is 299 K.

 

You need to apply the ideal gas law PV=nRT

 

You have the pressure, P=1.01 atm

you have the volume, V = 2.21 L

The ideal gas constant R= 0.08205 L. atm/ mole.K at  273 K

 

find n = PV/RT = (1.01 atm x 2.21 L / 0.08205 L.atm/ mole.K x 273 K)

 

n= 0.1 mole, Now find the pressure for n=0.1 mole, T= 299K and

L=1.23 L

 

P=nRT/V= 0.1mole x 0.08205 (L.atm/ mole.K x 299 k)/ 1.23 L

= 1.994 atm

Explanation:

Other Questions
Answer options:A:y=-2x+160B:y=-40x+160C:y=2x+160D:y=40x+160PLEASE I NEED HELP ASAP! Under the articles of confederation, why might one state tax goods manufactured in another state? Bruce bought two books. One book costs $4.00 more than three times the other. Together, the two books cost him $72. how are physical geograghy of mexico and central america similar How are photosynethis and cellular respiration similar? And how are they different ? How does the Chinese deal with the 'have/has' differences?Yu is used for have and yus is used to say hasChinese uses yu to mean bothChinese has no word for 'have/has'Chinese uses t for has and w for have What random question should I do for 100 technically 50 points? what is the provincial capital of lumbini province garland mills purchased a certain piece of macinery 3 years ago for $500,000. Its present resale value is $320,000. Assuming that the macine's resale value decreases exponentially, what will it be 4 years from now Write an exponential expression: choose a number between 0 and 10 to be the base and another number between 0 and 10, different from the base, to be the exponent. Label the base and the exponent. Then write the exponential expression in expanded form and standard form. The following are a trial balance and several transactions that relate to Lewisville's Concert Hall Bond Fund: Lewisville Debt Service Fund Concert Hall Bond Fund Trial Balance July 1, 2012 Cash $60,000Investments 40,000Restricted fund balance $100,000 $100,000 $100,000The following transactions took place between July 1, 2012, and June 30, 2013: 1. The city council of Lewisville adopted the budget for the Concert Hall Bond Fund for the fiscal year. The estimated revenues totaled $100,000, the estimated other financing sources totaled $50,000, and the appropriations totaled $125,000. 2. The General Fund transferred $50,000 to the fund. 3. To provide additional resources to service the bond issue, a property tax was levied upon the citizens. The total levy was $100,000, of which $95,000 was expected to be collected. 4. Property taxes of $60,000 were collected. 5. Revenue received in cash from the investments totaled $1,000. 6. Property taxes of $30,000 were collected. 7. The fund liability of $37,500 for interest was recorded, and that amount of cash was transferred to the fiscal agent. 8. A fee of $500 was paid to the fiscal agent. 9. Investment revenue totaling $1,000 was received in cash.10. The fund liabilities for interest in the amount of $37,500 and principal in the amount of $50,000 were recorded, and cash for the total amount was transferred to the fiscal agent. 11. Investment revenue of S500 was accrued. Use the preceding information to do the following: a. Prepare all the journal entries necessary to record the preceding transactions for the Concert Hall Bond Fund. b. Prepare a trial balance for the Concert Hall Bond Fund as of June 30, 2013. c. Prepare a statement of revenues, expenditures, and changes in fund balance and a balance sheet for the Concert Hall Bond Fund (assume all fund balance is restricted). d. Prepare closing entries for the Concert Hall Bond Fund DNA undergoes the process of replication to produce new strands of identical DNA before cell divisions. Describe the basic dna replication. I will give you brainliest Find the mass if the force is 18 N and the acceleration is 2 m/s2. Two ropes are attached a wagon one horizontal to the west with a tension force of 75N and other east and at an angle of 38 degrees upward from horizontal with a lension force of 125 N Find the components of the net force on the cart Show your work Find the unit rate for each of the following tables 1. Explain the events of Bacons Rebellion and why it was important? 2. What was the Mayflower Compact?3. What were the effects of growing tobacco on the Jamestown colony? 4. What was starving time? 5. Define indentured servant. 6. Define royal charter.7. Why was the Jamestown colony started?8. What events in England occurred making the Puritans form a colony??9. Where was the Plymouth located??10. List some of the issues the settlers of Jamestown and Plymouth face?? 11. How did Indians react to the colonists? 12. What were the Salem Witch trials?? 13. What is a charter? 14. Explain the differences between the views of the colonist and the Indians. 15. Explain the French and Indian War. 16. Discuss the characteristics of the 3 regions of colonies. The New England, Middle & Southern Colonies 17. What is the Stamp Act? 18. What is the Sugar Act? 19. What is the Intolerable Act? 20. What is the Quartering Act? 21. What is the Currency Act? 22. What are the Sons Of Liberty? 23. What is the Boston Massacre?24. What is the Tea Act? 25. What is the Boston Tea Party?? 26. What is the Coercive Act?? 27. What is the Townshed Act?? 28. What is the 1st Continental Congress?? 29. Why did the King Of England begin taxing the colonist? 30. What was the reaction by the colonist to many of acts imposed on them? 31. What does taxation without representation mean?32. Who was Thomas Paine?? 33. Describe the Battle of Lexington and Concord?? (THIS IS DUE BY 10:30 PM) (I NEED THESE ASAP) An archer is shooting at targets. The height of the arrow is 5 feet above the ground. Due to safety rules, the archer much aim the arrow parallel to the ground. How long does it take for the arrow to hit a target that is 3 feet above the ground? Round your answer to the nearest hundredth. what is the definite article for mochila Viserys deposited $10000 in to an account that pays a simple interest rate of 5%. How long will it take for his money to double ? Isabel offers to buy a team photo for 8 of her teammates,but 2 of them don't want one.If a team photo costs $5, how much will Isabel spend on her teammates?Choose the correct expression and solution to this problem.