. A sample of ammonium phosphate can be prepared by the reaction of aqueous ammonia and phosphoric acid. 3NH3 (aq) + H3PO4 (aq) (NH4),PO4 (aq) 25.0cm of 1.25 mol/dm phosphoric acid is neutralised by 45.3cm of aqueou ammonia (a) Calculate the concentration in mol/dm3 of the ammonia used.​

Answers

Answer 1

The concentration in mol/dm³ of the ammonia used is 2.07 mol/dm³

Balanced equation

3NH₃ (aq) + H₃PO₄ (aq) -> (NH₄)₃PO₄ (aq)

From the balanced equation above,

The mole ratio of the acid, H₃PO₄ (nA) = 1The mole ratio of the base, NH₃ (nB) = 3

How to determine the molarity of NH₃ Volume of acid, H₃PO₄ (Va) = 25 cm³Molarity of acid, H₃PO₄ (Ma) = 1.25 mol/dm³Volume of base, NH₃ (Vb) = 45.3 cm³ Molarity of base, NH₃ (Mb) = ?

MaVa / MbVb = nA / nB

(1.25 × 25) / (Mb × 45.3) = 1 / 3

31.25 / (Mb × 45.3) = 1 / 3

Cross multiply

Mb × 45.3 = 31.25 × 3

Divide both side by 45.3

Mb = (31.25 × 3) / 45.3

Mb = 2.07 mol/dm³

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Related Questions

One beaker contains a single compound, another an element, another a heterogeneous mixture, and another a homogeneous mixture. Which beaker's content's are a single compound?

Answers

The first beaker will contain a single compound, while another beakers will contains mixture of components.

What is mixture?

A mixture is defined as a composition made up of two or more chemical components that do not mix chemically.

It can also be defined as a substance formed by the combination of two or more separate substances that does not result in a chemical reaction.

There are two types of mixture.

Homogenous mixture - It is defined as a combination with the same proportions of its constituents in a given amount of sample. Heterogenous mixture - It is defined as a combination in which the composition varies throughout the solution.

Thus, the  first beaker will contain a single compound, while another beakers will contains mixture of components.

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Why are insulators made of ceramics and not metals?

Answers

Answer:

Most ceramics resist the flow of electric current, and for this reason ceramic materials such as porcelain have traditionally been made into electric insulators.

Explanation:

How much energy is released when 22.4g of CH4 is burned?

Answers

The combustion of methane, CH4, releases 890.4 kJ/mol. That is, when one mole of methane is burned, 890.4 kJ are given off to the surroundings. This means that the products have 890.4 kJ less than the reactants.

Combustion of one mole or 16 g of methane gas releases 810 kJ of heat energy. Thus, heat released by the combustion of 22.4 g of methane is 1134 kJ.

What is combustion?

Combustion of a substance is its reaction with atmospheric oxygen producing carbon dioxide and water. Combustion of hydrocarbons gases takes places easily and can be burned easily for fuels.

The chemical equation of combustion of methane is written below:

\(\rm CH_{4} + 2O_{2} \rightarrow CO_{2} + 2H_{2}O\)

This is an exothermic process and heat is released from the reaction system.

The heat released by the combustion of one mole of methane is 810 kJ.

molar mass of methane = 16 g/mol

no.of moles in 22.4 g = 22.4/16 = 1.4 g

Thus, heat released by 1.4 moles = 1.4 ×810 kJ =1134 kJ.

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Hydrochloric acid is a strong acid and carbonic acid is a weak acid. Yet 1 L of 1 M HCl solution will neutralize 1 mole of NaOH and 1 M of carbonic acid will neutralize 2 moles of NaOH. Explain.

Answers

Answer:

A mixture of a weak acid and its conjugate base is called a buffer solution, or a buffer. Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added.

I hope this helps :D

In ΔNOP, the measure of ∠P=90°, PN = 1. 1 feet, and NO = 3. 3 feet. Find the measure of ∠N to the nearest degree

Answers

By Using Pythagoras theorem, the measure of angle ∠N to the nearest degree is 18°.

The Pythagorean theorem is a fundamental principle in mathematics that describes the relationship between the sides of a right triangle. A right triangle is a triangle that has one angle that measures exactly 90 degrees. The Pythagorean theorem states that in any right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides (the legs).

We can use the Pythagorean theorem to find the length of segment OP:

\(OP^2 = ON^2 + PN^2\)

\(OP^2 = (3.3 feet)^2 + (1.1 feet)^2\)

\(OP^2 = 10.89 feet^2 + 1.21 feet^2\)

\(OP^2 = 12.1 feet^2\)

\(OP = √12.1 feet\)

OP ≈ 3.48 feet

Now, we can use trigonometry to find the measure of angle N:

sin(N) = PN / OP

sin(N) = 1.1 feet / 3.48 feet

sin(N) ≈ 0.3161

N ≈ sin⁻¹(0.3161)

N ≈ 18.4°

Therefore, the measure of angle ∠N to the nearest degree is 18°.

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What is the molecular formula of a compound with an empirical formula CHOCl and a molecular weight of 129 g

Answers

The molecular formula of the compound is C2H2O2Cl2.

To determine the molecular formula of a compound with the empirical formula CHOCl and a molecular weight of 129 g, we need to find the actual number of atoms of each element in the compound.The empirical formula CHOCl suggests that the compound contains one carbon (C), one hydrogen (H), one oxygen (O), and one chlorine (Cl) atom.To calculate the molecular formula, we need to compare the empirical formula's empirical mass to the compound's actual molecular weight. The empirical mass of CHOCl can be calculated by adding the atomic masses of the constituent elements: C (12.01 g/mol) + H (1.01 g/mol) + O (16.00 g/mol) + Cl (35.45 g/mol) = 64.47 g/mol.By dividing the molecular weight of 129 g by the empirical mass of 64.47 g/mol, we find that the compound's molecular formula is approximately C2H2O2Cl2.The molecular formula C2H2O2Cl2 indicates that the compound contains two carbon atoms, two hydrogen atoms, two oxygen atoms, and two chlorine atoms. This formula has a molecular weight of approximately 129 g, which matches the given molecular weight.

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This boy said he was finna destroy me and winked what does that mean

Answers

Answer:

pipe

Explanation:

You receiving

A measurement of the heat produced when a known amount of sugar burns in a constant volume calorimeter would enable us to first calculate the.

Answers

For the burning of sugar, there is a molar internal energy change. For a comb calorimeter, w=0 because Delta V=0 and Delta E=q+w. So Delta

E = q.

What about water makes it a suitable medium for heat transfer in calorimetry?

Water may absorb a lot of heat energy because of its large specific heat capacity without boiling or even significantly changing its temperature. Water is a useful medium for heat exchange in calorimetry because of this.

Heat transfer rates to or from a substance are measured using calorimetry. Heat is transferred to do this using a calibrated item (calorimeter). Calculating the quantity of heat transmitted by the process under study requires using the temperature change recorded by the calorimeter.

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Which element in period 2 is the smallest ? Justify your answer in terms of valence electrons And the attraction towards positive nucleus.

Answers

The smallest element in Period 2 is Fluorine. As we go across a period, from left to right, the atomic number increases. We are adding one proton to the nucleus and one electron to the valence shell. The force of attraction between the nucleus (positive) and the valence electrons (negative) also increases from left to right. That's why the atomic radius decreases from left to right, and the elements on the right side of the periodic table are smaller than the elements on the left.

Answer: Fluorine

This 2 guestions. I need answer please​

This 2 guestions. I need answer please

Answers

A. Mercury,Venus,Earth, and Mars.
B. Jupiter, Saturn,Uranus and Neptune.

Answer:

1st one is - Mercury,Venus,Earth, and Mars.

2nd one is - Jupiter, Saturn,Uranus and Neptune.

Explanation:

Engineering Question 15 of 30 Which of the following devices is used for atomizing and vaporizing the fuel before mixing it with air in varying proportions? O Spark plug O Carburetor O Flywheel Govern

Answers

The primary goal of the carburetor is to atomize and vaporize the fuel before mixing it with air in varying proportions, making it the device that is used for atomizing and vaporizing the fuel before mixing it with air in varying proportions.

The device that is used for atomizing and vaporizing the fuel before mixing it with air in varying proportions is Carburetor. A carburetor is a device that blends air and fuel for an internal combustion engine. It is often located on the top of an engine on a direct engine-to-carburetor link, and it controls how much air and fuel are mixed.The carburetor must also supply the engine with a spark plug to ignite the fuel/air mixture in each cylinder.

The carburetor must provide a fuel/air mixture that is consistent with the engine's changing demands, which vary with engine speed, load, and temperature. A carburetor is responsible for enriching the fuel/air mixture when the engine is cold and for leaning the mixture as the engine warms up. As well, it is also responsible for regulating the fuel/air mixture at part-throttle levels, where the engine spends most of its time when driving.

When an engine is running at full throttle, it is operating at wide-open throttle (WOT), and the carburetor provides the richest fuel/air mixture possible.The carburetor, like most engine systems, is a complex and sensitive device that must be correctly tuned to perform properly. The primary goal of the carburetor is to atomize and vaporize the fuel before mixing it with air in varying proportions, making it the device that is used for atomizing and vaporizing the fuel before mixing it with air in varying proportions.

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Jeff is picking up a 140N rock with a force of 85N if Chris comes to help and Chris can lift with a force of 60N what's the net force and direction of motion

Answers

Answer:

well there combined net force is 145N so the rock will go up and they will have 5 N to spare

Explanation:

after recrystallizing all of the compounds, you look back and realize you forgot a step; hot filtration. however, your crystals appear fine. with the techniques you know, how can you determine if the hot filtration step is/was important (hint: you would be able to assume the recrystallization was successful if what about each of your compounds was correct?) and also, what is the purpose of recrystallization?

Answers

The purpose of recrystallization is to purify a solid compound by dissolving it in a suitable solvent and then allowing it to slowly crystallize out of the solution.

The process exploits differences in solubility between the desired compound and impurities, allowing for their separation. Recrystallization is commonly used in organic chemistry to remove impurities and obtain pure solid compounds.

To determine if the hot filtration step is/was important, you can assume the recrystallization was successful if the crystals obtained are pure and have a defined, regular shape. This indicates that the impurities have been removed during the recrystallization process. If the crystals appear fine, it suggests that the hot filtration step may not have been necessary in this particular case.

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What volume of 7.8 M copper (II) sulfate stock solution is needed to prepare 3.25 L of a 5.4 M solution?
WILL MARK BRAINLIEST

Answers

Answer:

The volume of 9.0 M copper (II) sulfate stock solution needed to prepare 3.0 L of a 5.0 M solution is 1.667 L

Explanation:

Dilution is a process by which the concentration of a solute in solution is reduced by adding more solvent.

In other words, dilution is the procedure followed to prepare a less concentrated solution from a more concentrated one, and it simply consists of adding more solvent.

In a dilution the amount of solute does not vary. What varies in a dilution is the volume of the solvent: as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

The equation used in this case is:

Ci * Vi = Cf * Vf

where

Ci: initial concentration

Vi: initial volume

Cf: final concentration

Vf: final volume

In this case:

Ci: 9 M

Vi: ?

Cf: 5 M

Vf: 3 L

What is a measuring stick called?

Answers

A measuring stick called meterstick or yardstick.

A meterstick or yardstick is either a foldable ruler or straightedge which is used to measure the length and it is specially common in the construction industry. Meterstick are made up of plastic or A measuring stick called meterstick or yardstick.  

A meterstick or yardstick is either a foldable ruler or straightedge which is used to measure the length and it is specially common in the construction industry. Meterstick are made up of plastic or wood and they often have a metal or plastic joints so that they can be folded together. Metersticks are often rectangular and thin. Metersticks are divided with lines for each millimeter and numerical markings per centimeter. Whereas, yardsticks are often marked with a scale in inches. Measuring stick is also known as ruler. For example: We measure the diameter of a circle with a ruler, and also draw a perfectly straight line using its edge.

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what building should represent the lysosome and why

Answers

Answer:

Food Processing Plant

Explanation:

The lysosomes contain digestive enzymes that break down large food particles into sugars and other simple substances that can be used more easily as does a food processing plant that processes large quantities of food entering the city into smaller packages that can be used more easily.

_____ is responsible for bringing gravity into modern science.

Isaac Newton

Galileo Galilei

Albert Einstein

Answers

Isaac Newton is the answer

An enzyme works best at 98.6°F.

The equation used to describe it requires the temperature to be in K.

What is the correct temperature?

Use (F×0.555)+255.37=K or (K−255.37)×1.8=F.

Answers

The correct temperature that the enzyme works in kelvin is 310.1 K.

What is the temperature in kelvin?

We know that temperature is defined as the degree of the hotness or the coldness of an object. Now we can see that we have the temperature of the object already given in the unit of the degrees Fareinheight and we need to put in the unit of kelvin. Let us now attempt to carry out the conversion of the units as we can see.

Now we have;

(F×0.555)+255.37=K

We know that K is the temperature in kelvin while F is the temperature in °F.

Thus;

(98.6 ×0.555)+255.37= 310.1 K

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Within the textbook, the idea that goods would be equally distributed if the distributor was not allowed to know of his/her status or position is referred to as _____________.

Answers

Within the textbook, the idea that goods would be equally distributed if the distributor was not allowed to know of his/her status or position is referred to as the veil of ignorance.

This concept, introduced by philosopher John Rawls, suggests that in a just society, individuals should make decisions about the distribution of resources and opportunities without any knowledge of their own advantages or disadvantages in that society.

The veil of ignorance serves as a thought experiment to encourage impartiality and fairness, as decision-makers would be motivated to create a system that benefits everyone, regardless of their personal circumstances, ensuring a more equitable distribution of goods.

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What is the difference between the units rem and rad?
Rem is a conventional unit, and rad is an Sl unit.
O Rem is an Sl unit, and rad is a conventional unit.
Rem is used to measure biological risk, and rad is used to measure absorbed radiation.
Rem is used to measure absorbed radiation, and rad is used to measure biological risk.

Answers

Answer:

Rem is used to measure biological risk, and rad is used to measure absorbed radiation.

Explanation:

Answer:

Rem is used to measure biological risk, and rad is used to measure absorbed radiation.

Explanation:

Here is an image to prove that this is correct. Did on Edge

What is the difference between the units rem and rad?Rem is a conventional unit, and rad is an Sl unit.O

How many miles away is New York from the North American plate?

Answers

Answer:

Explanation:

The Eurasian Plate is moving away from the North American Plate at a rate the is about 3cm per year. That is about the same rate at which your fingernails will grow.

The distance from New York to London in 5 million years will be 3552 miles (5717 km). So if today it takes us 7 hours and 30 minutes to fly to London at a speed of 460 miles per hour, in 5 million years at the same rate of speed will take us close to 8 hours.

London is a North American Plate

Need help with question 4.) hurry please ASAP

Need help with question 4.) hurry please ASAP

Answers

Answer:

a mixture that is made when one substance dissolves and mixes with another substance

What is the molar concentration a a 12 % sodium chloride solution (MW 58.5)

Answers

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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responsible for bring messages from the sensory
organs to the brain. ?
A: Skeletal
B: Sensory
C: Motor
D: Axial

Answers

Answer:

motor nerves

Explanation:

sensory produces while motor transports

Lead can be prepared from galena [lead(II) sulfide] by first roasting the galena in oxygen gas to form lead(II) oxide and sulfur dioxide. Heating the metal oxide with more galena forms the molten metal and more sulfur dioxide.


(a) Write a balanced equation for each step, including the state of each chemical.


(1)


(2)


(b) Write an overall balanced equation for the process, including the state of each chemical.

Answers

The answer of the following following questions are PbO(s) + PbS(s) → 2Pb(l) + SO2(g) and  2PbS(s) + 3O2(g) → 2Pb(l) + 2SO2(g)

What is chemical reaction ?

A chemical reaction is a process in which one or more substances (reactants) are transformed into new substances (products) by the breaking and formation of chemical bonds. During a chemical reaction, the arrangement of atoms in the reactants is changed to form different molecules or compounds.

In a chemical reaction, the reactants are transformed into products through the rearrangement of atoms, but the total number of atoms remains the same. This is known as the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction.

(a)

Step 1: Roasting of galena in oxygen gas:

PbS(s) + 3O2(g) → PbO(s) + 2SO2(g)

Step 2: Heating the metal oxide with more galena:

PbO(s) + PbS(s) → 2Pb(l) + SO2(g)

(b) Overall balanced equation for the process:

2PbS(s) + 3O2(g) → 2Pb(l) + 2SO2(g)

Note: The state of the reactants and products has been indicated in the equations, with (s) representing a solid, (g) representing a gas, and (l) representing a liquid.

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what happens to your body if carbon dioxide is not removed​

Answers

Explanation:

can damage the tissues and organs and further impair oxygenation of blood

hi can someone pls help me it’s important i’m studying for my finals

hi can someone pls help me its important im studying for my finals

Answers

Answer:

i think the answer is D)

but u should ask the another person too:)

It’s either b or d because the other ones don’t sound right

Bronze is an alloy of copper and tin. What type of bond holds bronze together?


metallic bond

covalent bond

iconic bond

Answers

Answer:

The type of bond that holds bronze together is a metallic bond.

Explanation:

In metallic bonding, the atoms of the metal elements, in this case, copper and tin, share their valence electrons, forming a "sea" of delocalized electrons that are free to move throughout the structure. This results in a strong attraction between the positively charged metal ions and the negatively charged electron cloud, creating a cohesive force that holds the metal atoms together in a solid structure.

When you look at the absorption spectra of cranberry juice and apple juice, what colors/parts of the visible spectrum are absorbed?


Discuss how the colors/parts that are not absorbed contribute to the colors of cranberry juice and apple juice.

Answers

Looking at the absorption Spectra of cranberry juice and apple juice the color and part of the visible spectrum that are absorbed as well as how the colors that are not absorbed contributed to the the colors of the cranberry juice and apple juice are;

When the light actually hits on a surface,it is only a part of it that is reflected to the eyes whereas the rest of the spectrum is then absorbed by the object.

However,if the red wavelength is reflected,you will see the red color,but if all the spectrums are absorbed,you will see the black color,if then all the spectrums is reflected,you will see the white color.

When the light hits the surface, just a part will be reflected in the eyes of the person.

From the complete information, when an individual looks at the absorption spectra of cranberry juice and apple juice, just a part will be seen.

When the light hits the surface, there'll be a reflection in the eyes of the person as just a part will be reflected. The rest of the spectrum will be absorbed by the object.

Also, if the red wavelength is reflected, then one will see the red color. When all the spectrum is absorbed, one will see the black color. Lastly, when all the spectrum is reflected, one will see the white color.

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(T/F) reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms

Answers

The statement 'reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms' is true.

Phagocytic cells are the kind of cells that consume or destroy microorganisms by producing substances that are harmful to them, according to the study of biology.

The phagocytic cells produce oxygen and nitrogen intermediates, and these intermediates are reactive enough to bind to the chemicals in the microbe and inhibit their function. The microorganism dies when its activities are impeded to the point where it is unable to carry out the fundamental functions of life. Thus, the above statement is accurate.

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