what is a a metamorphic rock

Answer:

Take 1ml of given compound in a dry test tube. Add a few drops of ceric ammonium nitrate reagent and shake the solution well. Observe the solution. If red precipitate appears then the presence of alcoholic group is conformed.

Answer:

The value is \(J = 1.71 *10^{-6} \ kmol/m^2\cdot s \)

Explanation:

From the question we are told that

The length the tube is \(l = 0.20 \ m\)

The diameter of the tube is \(d = 0.01 \ m\)

The total pressure inside the tube is \(P = 101.32\ kPa = 101.32 *10^{3} \ Pa\)

The partial pressure of CO2 at the first end is \(P_1 = 456 \ mmHg = 456 *133.322 = 60794.832 \ Pa\)

The partial pressure of CO2 at the other end is \(P_2 = 76 \ mmHg = 76 *133 = 10132.472 \ Pa\)

The temperature is T = 298 K

The diffusion coefficient is \(D_{1,2} = 1.67 * 10^{-5} \ m^2 /s\)

Generally the molar flux of CO2 is mathematically represented as

\(J = \frac{D_{1,2} * [P_1 -P_2]}{R* T[l]}\)

Here R is the gas constant with value \(R = 8.314 \ J/k mol\)

So

\(J = \frac{ 1.67 * 10^{-5} * [60794.832 -10132.472 ]}{8.314 * 298 [0.20]}\)

\(J = 1.71 *10^{-3} \ mol/m^2\cdot s \)

Converting to kmol

        \(J = \frac{1.71 *10^{-3}}{1000}  \)

        \(J = 1.71 *10^{-6} \ kmol/m^2\cdot s \)

Answer:

option (c)2

Explanation:

amino acid have two carbon bond one of the carbon is a part of group is called the carboxy group

The ideal gas law equation is: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

To determine the mass of NaCl that reacted with F2 at 290 K and 1.5 atm, we can rearrange the equation as follows: n = PV/RT. Substituting in the values for P, V, R, and T, we get: n = (1.5 atm)(18.0 L)/(0.0821 atm*L/mol*K)(290 K) = 0.835 mol NaCl.

To determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP (standard temperature and pressure), we would use the same equation but with the values for P, V, R, and T corresponding to STP. At STP, P = 0.987 atm, V = 18 L, R = 0.0821 atm*L/mol*K, and T = 273 K. Therefore, n = (0.987 atm)(18 L)/(0.0821 atm*L/mol*K)(273 K) = 0.792 mol NaCl.

What is Sodium chloride?

Sodium chloride, also known as table salt, is an ionic compound composed of sodium and chloride ions in equal proportions. It is a mineral found naturally in most bodies of water, including sea water, and is widely used as a seasoning and preservative in food.

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Answer:

The ideal gas law equation is: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

To determine the mass of NaCl that reacted with F2 at 290 K and 1.5 atm, we can rearrange the equation as follows: n = PV/RT. Substituting in the values for P, V, R, and T, we get: n = (1.5 atm)(18.0 L)/(0.0821 atm*L/mol*K)(290 K) = 0.835 mol NaCl.

To determine the mass of sodium chloride that can react with the same volume of fluorine gas at STP (standard temperature and pressure), we would use the same equation but with the values for P, V, R, and T corresponding to STP. At STP, P = 0.987 atm, V = 18 L, R = 0.0821 atm*L/mol*K, and T = 273 K. Therefore, n = (0.987 atm)(18 L)/(0.0821 atm*L/mol*K)(273 K) = 0.792 mol NaCl.

Explanation:

Answer:

esh eod jod mq'e

Explanation:

uere hi'dh uoi

The limiting reactant is iron ore, the theoretical yield of iron metal is 701.344 kg, and the theoretical yield of carbon dioxide is 413.292 kg.

From the equation of the reaction:

\(2 Fe_2O_3(s) + 3 C(s) --- > 4 Fe(s) + 3 CO_2(g)\)

The mole ratio of iron ore to carbon is 2:3.

Mole of 1000 kg of iron ore = 1000000/159.69

                                          = 6,262 moles

Mole of 120 kg carbon = 120000/12

                                 = 10,000 moles

Thus, it appears that the carbon is in excess while the iron ore is limited in availability.

The mole ratio of the iron ore and the iron produced is 1:2. Thus, the equivalent number of moles of iron produced will be:

              6,262 x 2 = 12,524 moles

Mass of 12,524 moles of iron = 12,524 x 56

                                                = 701,344 g or 701.344 kg

Thus, the theoretical yield of iron is 701.344 kg.

The mole ratio of the iron ore and the carbon dioxide produced is 2:3. The equivalent mole of carbon dioxide produced will be:

         6,262 x 3/2 = 9,393 moles

Mass of 9,393 moles carbon dioxide = 9,393 x 44

                                                         = 413,292 or 413.292 kg

The theoretical yield of carbon dioxide is, therefore, 413.292 kg.

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Answer:

1.9 × 10² g NaN₃

1.5 g/L

Explanation:

Step 1: Write the balanced decomposition equation

2 NaN₃(s) ⇒ 2 Na(s) + 3 N₂(g)

Step 2: Calculate the moles of N₂ formed

N₂ occupies a 80.0 L bag at 1.3 atm and 27 °C (300 K). We will calculate the moles of N₂ using the ideal gas equation.

P × V = n × R × T

n = P × V / R × T

n = 1.3 atm × 80.0 L / (0.0821 atm.L/mol.K) × 300 K = 4.2 mol

We can also calculate the mass of nitrogen using the molar mass (M) 28.01 g/mol.

4.2 mol × 28.01 g/mol = 1.2 × 10² g

Step 3: Calculate the mass of NaN₃ needed to form 1.2 × 10² g of N₂

The mass ratio of NaN₃ to N₂ is 130.02:84.03.

1.2 × 10² g N₂ × 130.02 g NaN₃/84.03 g N₂ = 1.9 × 10² g NaN₃

Step 4: Calculate the density of N₂

We will use the following expression.

ρ = P × M / R × T

ρ = 1.3 atm × 28.01 g/mol / (0.0821 atm.L/mol.K) × 300 K = 1.5 g/L

Answer:

b) Pine Tree

Pine trees need wind for fertilization to occur.

Answer:

Gymnosperm, So in reality its Pine Tree. ;):)

Explanation:

Gymnosperm Fertilization The female gametophyte contains several archegonia, where the egg cells originate and develop. Fertilization occurs when pollen grains (male gametophytes) are carried by the wind to the open end of an ovule, which contains the eggs, or female gametophyte.

Answer:

The characteristics of unicellular organisms are as follows:

The unicellular organisms usually reproduce by asexual means.

They can be eukaryotes or prokaryotes.

They are found in almost all habitats, from hot springs to frozen tundra.

They possess whip-like structures for movement.

The nutrients enter or leave the cell by the process of diffusion.

Explanation:

Answer:

involved in recycling

Makes oxygen we breathe

Explanation:

According to mole concept and Avogadro's number , there are 300.5 moles in 1.81×10²⁶ molecules of water.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

As 1 mole= 6.023×10²³ molecules ,therefore 1.81×10²⁶ molecules= 1.81×10²⁶ /6.023×10²³=300.5 moles.

Thus, there are 300.5 moles in 1.81×10²⁶ molecules of water.

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Answer:

i think it's C

Explanation:

Answer: 13.5 minutes to run 3.2 km.

Explanation: To solve this problem, you need to convert the distance from kilometers to miles and the speed from miles per hour to kilometers per hour. 3.2 km is approximately 1.988 miles and 5.5 mph is approximately 8.851 kph. To find the time it takes to run 1.988 miles at 8.851 kph, you can use the formula time = distance ÷ speed. Plugging in the values, you get time = 1.988 miles ÷ 8.851 kph, which simplifies to approximately 0.225 hours or 13.5 minutes.

Therefore, it will take the student approximately 13.5 minutes to run 3.2 km.

The oxidation number of reactant Fe is 0 while the  oxidation number of iron in the product is +3

The term redox reaction implies a reaction in which there is an increase in the oxidation number of a specie and the decrease in the oxidation number of another specie.

Now we have the answers as follows;

1) The oxidation number of reactant Fe is 0

2) The oxidation number of reactant oxygen is 0

3) The oxidation number of iron in the product is +3

4) The oxidation number of oxygen in the product is -2

5). Iron is oxidized in the reaction

6) Oxygen is reduced in the reaction

7) The oxidizing agent in this case is the oxygen atom

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EXPLANATION:

Alliance is an approach in which two or more companies agree to pool their resources together to form a combined force in the marketplace. Unlike a merger, an alliance does not involve the emergence of a new combined entity. ... The joint venture is a very popular form of an alliance.

Answer:

Alliance is an approach in which two or more companies agree to pool their resources together to form a combined force in the marketplace. Unlike a merger, an alliance does not involve the emergence of a new combined entity. ... The joint venture is a very popular form of an alliance.

Answer:

Fe3(PO4)2

Explanation:

calculate the molar mass for each of the following compounds 7. PbSO

8. Ca(OH)2

9. Na3PO4

10. (NH4)2CO3

11. C6H12O6

12. Fe3(PO4)2

13. (NH4)2S

14. Zn(C2H3O2)2

Answer:

relative volatility.

mark me brainliestt :))

Answer: in temperature

The reaction ; Fe(s) + H₂SO₄ -----> FeSO₄ + H₂ .   is a single displacement reaction ( 9 )

The reaction  Fe(s) + H₂SO₄  produces  FeSO₄ + H₂ as its product  because this is a reaction between diluted Sulfuric acid and iron. this is a single displacement reaction because the reactants and products are balanced

A single displacement reaction is a reaction wherein an element is displaced by another element in a given compound. as seen in the reaction equation written above.

Hence we can conclude that The reaction ; Fe(s) + H₂SO₄ -----> FeSO₄ + H₂ is a single displacement reaction

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Answer:

The solute is the substance that is being dissolved,

Explanation:

A solution is a homogeneous mixture consisting of a solute dissolved into a solvent .

Answer:

solutes

Things which dissolve are called solutes and the liquid in which they dissolve is called a solvent to form a solution. Strongly polar substances easily attract water molecules. The water molecules surround the charged solute.

Explanation:

Took the same test and that was the one that was right hope this helps you

Pure iron is not so strong to use in construction field. Addition of carbon make iron more strong and less brittle.

The useful form of iron made by incorporating carbon and traces of other metals is called cast iron. Pure form of iron is not strong enough to be useful and it is brittle.

Steel does become stronger and more durable when carbon is added to iron, but only to a certain extent. It will then grow stronger but less resilient (ie like cast iron).

Iron is made stronger by carbon by altering its crystal lattice. In terms of effect, this distortion is comparable to work hardening. Sadly, it is a very complicated impact that depends on how the steel is heat treated and precisely how much carbon is applied. Not all metals are subject to this.

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Answer:10

Explanation:

Answer:

No, compound A and B are not the same compound

Explanation:

According to the law of definite proportion "every chemical compound contains fixed and constant proportions (by mass) of its constituent elements." (Encyclopedia Britannica)

We can see in the question that the ratio of flourine to sulphur in compound A is 1.18 while the ratio of flourine to sulphur in compound B is 2.37.

The two chemical compounds do not contain a fixed proportion by mass of their constituent elements therefore, they can not be same compound according to the law of definite proportions.

Periodic tables arrange and group the periodic element based on their similar properties and atomic number. Semiconductors are most likely to be found in columns IV and VI of the periodic table.

Semiconductors are solid substances defined by the property and ability to conduct the charge and heat. They show the property of conductivity and have been comprised mostly of metals. They are able to show conductivity due to electrical properties.

Semiconductors are mostly found in groups IV and VI of the periodic table; and comprises mainly of tin (Sn), silicon (Si),  tellurium (Te), germanium (Ge), and selenium (Se). These elements are used in transistors and diodes to conduct electricity.

The element is semiconductors only if they have more and fewer electrons in their outer valence shell of the atom so that they can be n or p-type semiconductors. They are majorly used in electronic devices.

Therefore, columns IV and VI of the periodic table are comprised of semiconductors.

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Answer:

See explanation

Explanation:

PO4{3-} is phosphate
Sulfite's formula is SO3{2-}
Sulfate is SO4{2-}
OH- is hydroxide
Note: {x±} signifies the charge of the entire molecule

The polyatomic ions in question are phosphite ion, sulfite ion, and sulfate ion.

The formula PO3−4 represents the polyatomic ion called phosphite ion. It is composed of one phosphorus atom bonded to three oxygen atoms. The name of the sulfite ion is SO3−2, and it consists of one sulfur atom bonded to three oxygen atoms. Lastly, the sulfate ion has the formula SO4−2, and it is composed of one sulfur atom bonded to four oxygen atoms.

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Copper oxide, CuO has a relative formula mass of 80.

What is the Relative Formula mass?

This refers to the total of the relative atomic masses of the atoms in the numbers seen in the formula.

This refers to the relative mass of atoms when compared with the carbon-12 atoms Ar. Relative formula mass is a measure of relative mass, thus it has no unit.

O=16 and Cu=64

copper oxide, CuO=  (1 * 64) + (1 * 16)

                              = 64      +  16

                               =80

Where,

1 = The subscript value of the element present.

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Precision relates to the consistency and reproducibility of measurements, while accuracy reflects how close measurements are to the true value.

Precision and accuracy are two important concepts in the context of errors in measurements. While they both pertain to the quality of data, they refer to different aspects.

Precision refers to the degree of consistency or reproducibility in a series of measurements. It reflects the scatter or spread of data points around the average value. If the measurements have low scatter and are tightly clustered, they are considered precise. On the other hand, if the measurements have a high scatter and are widely dispersed, they are considered imprecise.

Accuracy, on the other hand, refers to the closeness of measurements to the true or target value. It represents how well the measured values align with the actual value. Accuracy is achieved when measurements have a small systematic or constant error, which is the difference between the average measured value and the true value.

Errors in measurements can be classified into two types: random errors and systematic errors.

Random errors are associated with the inherent limitations of measurement instruments or fluctuations in the measurement process. They lead to imprecise data and affect the precision of measurements. Random errors can be reduced by repeating measurements and calculating the average to minimize the effect of individual errors.

Systematic errors, on the other hand, are caused by consistent biases or inaccuracies in the measurement process. They affect the accuracy of measurements and lead to a deviation from the true value. Systematic errors can arise from factors such as instrumental calibration issues, environmental conditions, or experimental techniques. These errors need to be identified and minimized to improve the accuracy of measurements.

In summary, precision refers to the degree of consistency or reproducibility of measurements, while accuracy refers to the closeness of measurements to the true value. Random errors affect precision, while systematic errors affect accuracy. To ensure high-quality measurements, both precision and accuracy need to be considered and appropriate techniques should be employed to minimize errors.

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Calcium sulfate (CaSO4) is a chemical compound made from calcium, oxygen, and sulfur.

The major sources of calcium sulfate naturally happen are gypsum and anhydrite, which occur at many position worldwide as evaporites.

A simple procedure for preparing acicular calcium sulfate dihydrate is on condition that in which a slurry of calcium carbonate carrying 100 to 800 grams per lite of calcium carbonate is assorted with a solution of sulphuric acid carrying 80 to 500 grams per liter sulphuric acid in proportions that construct calcium sulfate.

So we can conclude that Calcium sulfate, CaSO4, is a natural happen calcium salt.

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Answer:

will be 9.7 Liters

Explanation:

True, the entropy of a perfectly ordered crystalline substance at 0 K is 0 J/mol.

The third law of thermodynamics states that, the entropy of a system approaches a constant value as the temperature of the system approaches absolute zero.

The entropy of any perfectly ordered, crystalline substance at absolute zero temperature is zero.  That is, the entropy of a pure, perfect crystalline substance at 0 K is 0 J/K.

Thus, we can conclude that the given statement is true.  The entropy of a perfectly ordered crystalline substance at 0 K is 0 J/mol.

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Answer:

The major ionic constituents whose concentrations can be determined from the salinity are known as conservative substances. Their constant relative concentrations are due to the large amounts of these species in the oceans in comparison t

Answer:

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Q.21 7.53*10²² atoms of O2 = 0.125 moles of O2

mass of one mole O2 = 16 grams

mass of 0.125 mole O2 = 2 grams

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Q.22 2.32*10²³ formula units of Al2(SO4)3 = 0.385 moles of Al2(SO4)3

mass of one mole Al2(SO4)3 = 342.15 grams

mass of 0.385 mole Al2(SO4)3 = 131.79 grams

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Q.23 1.50*10²² atoms of AgNO3 = 0.025 moles of AgNO3

mass of one mole AgNO3 = 169.87 grams

mass of 0.125 mole AgNO3 = 4.23 grams

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Q.24 2.55*10²² atoms of CaCO3 = 0.042 moles of CaCO3

mass of one mole CaCO3 = 100 grams

mass of 0.125 mole CaCO3 = 4.23 grams

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