balance the following equation by oxidation reduction method FeSO4
+
KMnO4+ H2SO4 → Fe2 (SO4)3+ k2SO4+MnSO4+H2O​

The volume of a 2.498M solution that contains 245 g of sulfuric acid is 1L.

The volume of a solution can be calculated from the molarity using the following expression:

Molarity = no of moles ÷ volume

Molarity refers to the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

no of moles of sulfuric acid = 245g ÷ 98g/mol

no of moles of sulfuric acid = 2.5moles

volume = 2.5moles ÷ 2.498M

volume = 1L

Therefore, 1L is the volume of the sulfuric acid solution.

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Answer:

35.5 is the answer

Explanation:

pls mark me brainlest

From the balanced chemical equation above, we can see that:

• A precipitate may form wh ( BaSO4(s) ) forms.

• Therefore, ,there is a reaction, that took place here.

Answer:

i think js b...........

While spelunking you drop your flashlight and the on/off button breaks. in order to repair it, "you have a flair for emergencies, which has a strip of magnesium (Mg) in it that you could remove."

The main distinction between the two must be why each person is just exploring the cave. Spelunking would be the term used when someone enters a cave purely for fun and an adrenaline rush. On the other side, caving would be the practice of exploring caves for biological or conservation purposes.

Magnesium is a kind of element which has the atomic number 12.

you are exploring a system of caves. You have ignored safety regulations and have not brought a partner. While spelunking you drop your flashlight and the on/off button breaks. in order to repair it, you must find something that can conduct electricity and complete the circuit in the flashlight. You feel around you in the darkness and find a few different items. You have a flair for emergencies, which has a strip of magnesium (Mg) in it that you could remove.

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Answer:

The law of conservation of mass states that mass is neither created nor destroyed by chemical reactions or physical transformations. So basically, the mass of the products in a chemical reaction must equal the mass of the reactants

Answer: law of conservation of mass says mass can’t be created or destroyed

Explanation:

the true definition is “the law of conservation of mass states that mass can neither be created nor destroyed in a chemical reaction. Thus, the amount of matter can not change

just change the more mature words into child proof words

Answer:

The refractive index can be seen as the factor by which the speed and the wavelength of the radiation are reduced with respect to their vacuum values: the speed of light in a medium is v = c/n, and similarly the wavelength in that medium is λ = λ0/n, where λ0 is the wavelength of that light in vacuum.

Explanation:

Answer:

decrease.

Explanation:

WHY? - As you go across a period, electrons are added to the same energy level. ... The concentration of more protons in the nucleus creates a "higher effective nuclear charge." In other words, there is a stronger force of attraction pulling the electrons closer to the nucleus resulting in a smaller atomic radius.

C. Pipet Analytical balance,It is expected that the accuracy of the following equipment will be examined depending on the equipment listed: Thermometer Graduated Cylinder Thermometer Buret C.

Pipet Analytical balance, part E These tools are frequently used in scientific experiments to measure volume, temperature, and weight. It's also crucial to understand the difference between accuracy and precision. While precision refers to the reproducibility of a series of measurements, accuracy relates to how near a measurement is to the real value of the quantity being measured.While 10 ml graduated cylinders feature marks every tenth of a milliliter, most 50 ml graduated cylinders have markings spaced every milliliter. Our measurement should be more precise if we use a 10 ml graduated container than if we use a 50 ml graduated container. We refer to an instrument as being ACCURATE if it produces values that are extremely near to the genuine value. Example: The same sample was measured three times using a graduated cylinder, yielding readings of 566 mL, 584 mL, and 541 mL. These three figures add out to 563.7 mL on average.

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Answer:

To design a robot that propels itself across an ice rink using the same principles as rockets, I would start by considering the materials that would be suitable for use on ice. Some materials that might work well for this purpose include plastic, rubber, and certain types of metal, such as aluminum or stainless steel.

Explanation:

Answer:

Explanation:

Students learn about humankind’s search for life in outer space and how it connects to robotics and engineering. NASA is interested in sending exploratory missions to one of Jupiter’s moons, Europa, which requires a lot of preparatory research and development on Earth before it can happen. One robot currently being engineered as a proof of concept for a possible trip to explore Europa is the Icefin, which is an innovative robot that can explore under ice and in water, which are the believed conditions on Europa. This lesson provides students with intriguing information about far off (distance and time!) space missions and field robotics, and also sets up two associated robotics and arts integration activities to follow. The lesson can be used individually to provide new information to students, or as a precursor to the associated activities. A PowerPoint® presentation and worksheet are provided

Answer:

Hey mate.....

Explanation:

This is ur answer....

Hope it helps!

Brainliest pls!

Follow me! :D

Oxygen-16: 8 protons, 8 neutrons, 8 electrons

Oxygen-18: 8 protons, 10 neutrons, 8 electrons

Using atomic and mass numbers, we can find information about the makeup of atoms.

Protons

Every element has a unique number of protons, and every atom of the same element will have the same number of protons. This means that both oxygen atoms must have the same number of protons. The number of protons in an element is equal to its atomic number. Since oxygen has an atomic number of 8, all oxygen atoms will have 8 protons. This means that oxygen-16 and oxygen-18 have 8 protons.

Neutrons

The number of neutrons an atom of a certain element can have varies. Atoms of the same element that have different numbers of neutrons are known as isotopes. The number of neutrons can be found through the mass number. The mass number is the number that follows the dash in the name of the isotope. This number is equal to the protons plus the neutrons. So, to find the number of neutrons in an oxygen atom, subtract 8 protons from the mass number. This means oxygen-16 has 8 neutrons and oxygen-18 has 10 neutrons.

Electrons

Remember that electrons are negatively charged, protons are positively charged, and neutrons have no charge. The number of electrons in an atom determines the charge of the atom. If the number of electrons equals the number of protons, then the charge of the atom will equal 0. If there are more electrons, then the atom will be negatively charged and vice versa. Since neither of the atoms has any indication of a nonzero charge, the number of electrons must equal the number of protons. So, both oxygen atoms have 8 electrons.

Answer:

hello . proton:17 electron:18 neutron :18

Explanation:

it's obvious and you must memorise that Cl has 17 protons .

because it has one negative so electrons which are negative should be one more than protons I mean 18

neutron doesn't need to look at it here

electron shows the answer.

hope u understand

if u have any questions don't hesitate to ask.

Answer:

Option A. 1 0n

Explanation:

Details on how to balanced the equation for the reaction given in the question above can be found in the attached photo.

The missing part of the transmutation equation as it has been shown is 1/o n. Option A

Nuclear transmutation is the process of shifting the number of protons in an atom's nucleus to change one element into another. Nuclear processes that change one atomic nucleus into another with a different atomic number are involved.

The production of nuclear energy, radioactive decay, and the creation of new isotopes for use in science and industry all depend on nuclear transmutation, a fundamental idea in nuclear physics.

We have the equation as;

238/92 U + 12/6 C  ----> 244/98 Cf + 6 1/0 n

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White vinegar typically consists of 93%–96% water and 4–7% acetic acid. It can be used to cooking, bake, cleaning, and get rid of weeds. It can also help you lose weight and lower your blood sugar and cholesterol. Consumption is safe in moderation, but excessive consumption or when combined with certain medications could be harmful.

Apple cider vinegar is widely used in cooking and as a salad dressing because it contains acetic acid and nutrients like vitamins C and B vitamins. But at the same time, it's been utilized customarily as medication. It helps in losing weight.

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Explanation:

To form bonds with noble gases, a lot of energy is required to form those bonds. Halogens, on the other hand, are extremely reactive. ... The halogens tend to be very reactive, while the noble gases are in no way reactive and don't bond easily, if at all.

Answer:

Yes it does

Explanation:

Silver is a chemical element with the symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal.[citation needed] The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.

Answer:

your question is not very clear but I think the answer is either

Primary (non-rechargeable)

Secondary (rechargeable) or

Lithium-ion battery.

Rechargeable li-ion button cell.

Answer:

3 atoms of Ba

2 x 1 = 2 atoms of Cl

2 x 3 = 6 atoms of O

So, the total number of atoms for each element in 3Ba(ClO3)2 are:

Barium (Ba): 3 atoms

Chlorine (Cl): 2 atoms

Oxygen (O): 6 atoms

Explanation:

Answer:

wala kang jowa sabi ko haha

In this solution, sodium ion [Na+] has a molar concentration of 0.02745 M. (or 27.45 mM).

A salt combining sodium and phosphate, sodium phosphate has the chemical formula Na3PO4. It is an inorganic chemical that comes in a variety of shapes, including hydrated and anhydrous versions.

The amount of sodium phosphate in the solution must first be determined in moles:

Number of moles of Na3PO4 = Mass of Na3PO4 / Molecular weight of Na3PO4

Number of moles of Na3PO4 = 1.500 g / 163.94 g/mol

Number of moles of Na3PO4 = 0.00915 mol

The total number of moles of sodium ions in the solution is because one molecule of sodium phosphate (Na3PO4) contains three sodium ions (Na+). 

Number of moles of Na+= 3 x Number of moles of Na3PO4

Number of moles of Na+ = 3 x 0.00915 mol

Number of moles of Na+ = 0.02745 mol

The sodium ion [Na+] molar concentration in the solution can then be calculated as follows:

Moles of Na+ / volume of solution = number of moles of Na+

Na+ has a molar concentration = 0.02745 mol / 1.00 L.

Na+ has a molecular weight = 0.02745 M.

As a result, this solution has a molar sodium ion concentration of 0.02745 M. (or 27.45 mM).

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Answer:52M

Explanation:

use S= 1000w/ MV

Here, s= molarity

w= the amount of NaCl

M= the atomic mass of NaCl

V= the volume of solution

An average brightness was calculated for each length of graphite tested to get a better understanding of the relationship between the length of the graphite and the brightness of the line it produced.

Graphite has many uses in various industries. Some of its uses include: Pencils, Lubricants, Refractories, Batteries, Electrodes, Nuclear reactors, Aerospace industry.

By calculating the average, it is possible to see if there is a trend in the data and if longer or shorter lengths of graphite produce brighter or duller lines. This information can be useful in determining the best length of graphite to use for a particular task or project.

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The blood alcohol level in mass percent is 0.0956% if 8.33 mL of 0.04988 M \(K2Cr2O7\) is required for titration of a 9.9950 g sample of blood.

To calculate the blood alcohol level in mass percent, we need to first determine the amount of ethanol present in the blood sample. This can be done by using a redox titration with potassium dichromate \((K2Cr2O7)\), which oxidizes the ethanol to acetic acid.

The balanced chemical equation for the reaction is:

\(C2H5OH + 2Cr2O7^2- + 16H+ → 2CO2 + 4Cr^3+ + 11H2O\)

From the balanced equation, we can see that the stoichiometric ratio between \(K2Cr2O7\) and ethanol is 2:1. Therefore, the moles of ethanol in the blood sample can be calculated as:

moles of ethanol = 0.5 × moles of \(K2Cr2O7\)

The moles of \(K2Cr2O7\)can be determined from its concentration and volume used in the titration:

\(moles of K2Cr2O7 = 0.04988 mol/L × 8.33 × 10^-3 L = 4.15 × 10^-4 mol\)

Substituting this value into the equation above, we get:

moles of ethanol = 0.5 × 4.15 × 10^-4 mol = 2.075 × 10^-4 mol

The mass of ethanol in the blood sample can be calculated from its molar mass:

\(mass of ethanol = 2.075 × 10^-4 mol × 46.07 g/mol = 9.551 × 10^-3 g\)

Finally, the blood alcohol level in mass percent can be titration calculated as:

mass percent = mass of ethanol / mass of blood sample × 100%

mass percent = \(9.551 × 10^-3 g / 9.9950 g × 100%\)

mass percent = 0.0956%

Therefore, the blood alcohol level in mass percent is 0.0956%.

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We can use the formula for heat transfer to find the final temperature of the tin:

Q = mcΔT

where Q is the heat transferred, m is the mass of the tin, c is the specific heat of tin, and ΔT is the change in temperature.

We want to solve for ΔT, which we can rearrange as:

ΔT = Q / (mc)

Plugging in the values we know:

m = 163.79 g

c = 0.226 g/J oC

Q = 2432.0 J

ΔT = 2432.0 J / (163.79 g * 0.226 g/J oC)

ΔT = 6.44 oC

Therefore, the final temperature of the tin will be:

Final temperature = Initial temperature + ΔT

Final temperature = 27.4 oC + 6.44 oC

Final temperature = 33.84 oC

So the final temperature of the tin will be 33.84 oC.

The statement that best explains why the chemical equation provided for combustion of methane supports law of conservation of mass is as follows: There is same number of each kind of atom before and after the chemical reaction and the total mass remains the same (option D).

The law of conservation of mass is a conservation law that states that the total mass of a closed system remains constant regardless of the chemical or physical changes that take place within it.

The law of conservation of mass further explains that in a chemical reaction, the amount of each atom on both sides of the equation is the same.

According to this question, methane gets combusted in air. To fulfill the law of conservation of mass, the same number of each kind of atom before and after the chemical reaction and the total mass remains the same.

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A chemical formula is a way of identifying a compound by placing all the elements present in the compound together using their acronyms

1.

A) Bi(NO3)3

B) NH4ClO3

C) Cl2O7

D) AlP

E) HClO

F) P2O5

Answer:

B

Explanation:

A. 3 NaOH + (NH4)3PO4 -> Na3PO4 + 3 H2O + 3 NH3

B. C2H6O + 3 O2 -> 2 CO2 + 3 H2O

C. Mg3N2 + 6 H2O -> 3 Mg(OH)2 + 2 NH3

D. 2 C8H18 + 25 O2 -> 16 CO2 + 18 H2O

E. C12H22O11 + 12 O2 -> 12 CO2 + 11 H2O

F. H2C2O4 + CaCl2 -> CaC2O4 + 2 HCl

Answer:

C) only potential energy.