if the reaction yields 21.1l of nitrogen gas what mass of nan3 in grams would be required to produce this volume at stp?

The thermal capacity under a certain pressure Since the substance expands and produces energy when heat is applied at a constant pressure, CP is greater than the heat capacity at constant volume CV.

In the first instance, the temperature of the gas must be raised with greater heat. Since it requires more energy to raise the temperature by one unit in the former situation, CP, or specific heat at constant pressure, is greater than CV, or specific heat at constant volume.

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Answer:

while atoms form together, they percentage their outermost electrons to create more sustainable strength states. This sharing bonds the atoms into an ionic shape or a molecule

Explanation:

i hope this help a little

Answer:

5.2 x 10^8

Explanation:

Answer:

5.2x10^8

Explanation:

hope this helped

The Ground state electronic configuration of  Cr2+:[Ar] 3d4, Cu2+: [Ar] 3d9, Co3+: [Ar] 3d6

Electronic configuration, sometimes referred to as electronic structure or electron configuration, is the arrangement of electrons in orbitals that surround an atomic nucleus.

1. Cr2+

Atomic no.of Chromium(Cr)=24  

a ground state Chromium's electronic structure is as follows: [Ar] 4s1 3d5 = 1s2 2s2 2p6 3s2 3p6

(Atomic no.of [Ar](argon) = 18)

so,ground state electronic configuration for Cr2+:

[Ar] 4s0 3d4 =[Ar] 3d4

so, ground state electronic configuration of Cr2+:

[Ar] 3d4

2. Cu2+

Atomic number of Copper(Cu)= 29

Ground state electronic configuration of Cu:

[Ar] 4s1 3d10

so, ground state electronic configuration of Cu2+:

[Ar] 4s0 3d9 = [Ar] 3d9

so,electronic configuration of Cu2+:

[Ar] 3d9

3.Co3+

Atomic number of Cobalt(Co)=27

Ground state electronic configuration of Co:

[Ar] 4s2 3d7

so,electronic configuration of Co3+:

[Ar] 4s0 3d6 = [Ar] 3d6

So,electronic configuration of Co3+:

[Ar] 3d6

Therefore the Ground state electronic configuration of

Cr2+:[Ar] 3d4, Cu2+: [Ar] 3d9, Co3+: [Ar] 3d6

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Answer: 200000 J

Explanation:

Formula for kinetic energy: Ek=1/2 *mv^2

m=1000 kg. v=20.0m/s

Ek=1/2 *1000*20^2

Ek=500*400

Ek=200000 J

J=joules

The minimum amount of oxygen required for the complete combustion of 20cm³ of CO and 20cm³ of H₂ would be 20.16 cm³ at STP.

The balanced chemical equation for the combustion of CO and H2 is:

CO + 1/2O2 → CO2

H2 + 1/2O2 → H2O

From the equation, we can see that one mole of CO requires 1/2 mole of O2, while one mole of H2 requires 1/2 mole of O2.

From the balanced equation, we can see that each mole of CO requires 1/2 mole of O2, while each mole of H2 requires 1/2 mole of O2.

Therefore, we need 0.00083/2 = 0.00042 moles of O2 for the combustion of CO and the same amount for the combustion of H2.

The total amount of O2 required is the sum of the amounts needed for each reactant:

Therefore, the minimum amount of oxygen required for the complete combustion of 20 cm³ of CO and 20 cm³ of H2 is approximately 20.16 cm³ at STP.

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Answer:

99.3%

Explanation:

The percent by mass of the solute can be expressed as:

And for this problem:

So to calculate the percent by mass first we need to calculate the mass of water, to do so we use its density (1 g/L):

Density water = mass water / volume

Now we have all the data required to calculate the % mass:

Answer: 14.3

Explanation:

The observed optical rotation of the solution is 0.300 degrees.

When a solution of D-lactose is exposed to plane-polarized light, it exhibits optical rotation. The observed optical rotation is a measure of the degree of rotation of the plane of polarized light as it passes through the solution. In this case, the observed optical rotation is 0.300 degrees.

To determine the observed optical rotation of a solution, we need to know the specific rotation of the compound in question. The specific rotation is a characteristic property of a substance and is typically reported in units of degrees per decimeter per gram (°/dm/g). Unfortunately, you haven't provided the specific rotation value for D-lactose.

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B. ball rolling down the hill

The type of energy that is NOT chemical energy is:

B. ball rolling down the hill

Chemical energy refers to the energy stored in chemical substances, such as the energy released during a chemical reaction or the energy stored in the bonds of molecules.

Options A, C, D, and E all involve examples of chemical energy:

A. Butane in a lighter:

The combustion of butane releases chemical energy in the form of heat and light.

C. Food:

The energy stored in food molecules, such as carbohydrates, fats, and proteins, is converted into chemical energy during metabolism.

D. Gasoline in a car:

The combustion of gasoline in an engine releases chemical energy, which is converted into mechanical energy to power the car.

E. Battery:

Batteries store chemical energy that can be converted into electrical energy through chemical reactions.

In contrast, option B, a ball rolling down the hill, involves kinetic energy. Kinetic energy refers to the energy of an object due to its motion.

As the ball rolls downhill, its energy is in the form of kinetic energy, not chemical energy.

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solid(particles are appropriately packed)  in solids there is no distance between the constituent particles

liquid(particles are closely packed).

gas(particles move freely) .

In a gas, the particles are evenly spaced out and not in any particular order. There is no regular arrangement of liquid next to one another. solids are regularly arranged and closely packed.

We can infer from the diagram that there is no space between the individual particles that make up solids. Without any intermolecular voids between the individual molecules, it is a completely packed structure.

In contrast, the particles in liquids are more closely packed than those in gaseous fluids, albeit they are more loosely packed than those in solids. We can now observe that there is a significant intermolecular gap between the constituent particles of gases. They are packed more flimsily than

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Answer:

An example of photosynthesis is how plants convert sugar and energy from water, air and sunlight into energy to grow.

ƪ(˘⌣˘)ʃ

The two ions present in the solution are:

1. Sodium ion, Na⁺

2. Hydroxide ion, OH¯

The correct answer to the question is the 3rd option. The sodium ion is positive, and the hydroxide ion is negative.

Ions are atoms or group of atoms which possess an electric charge.

Aqueous Sodium hydroxide, NaOH contains sodium ion and hydroxide ion.

The sodium ion is positive while the hydroxide ion is negative as illustrated below:

NaOH(aq) —> Na⁺(aq) + OH¯(aq)

From the illustration above, we can conclude that the correct answer to the question is the 3rd option. The sodium ion is positive, and the hydroxide ion is negative.

Please see attached photo for further details

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1. The limiting reagent is sulfur trioxide, SO₃ and the excess reagent is water, H₂O

2. The mass of the excess reagent leftover is 14.92 g

3. The mass of sulfuric acid, H₂SO₄ is produced is 8.06 g

The limiting and excess reagent can be obtained as follow:

SO₃ + H₂O -> H₂SO₄

From the balanced equation above,

80 g of SO₃ reacted with 18 g of H₂O

Therefore,

6.58 g of SO₃ will react with = (6.58 × 18) / 80 = 1.48 g of H₂O

From the above calculation, we can see that only 1.48 g of H₂O out of 16.4 g is needed to react completely with 6.58 g SO₃.

Thus, the limiting reagent is SO₃ and the excess reagent is H₂O

The mass of the excess reagent leftover can be obtained as follow:

Mass of excess reagent, H₂O leftover = Mass given - mass reacted

Mass of excess reagent, H₂O leftover = 16.4 - 1.48

Mass of excess reagent, H₂O leftover = 14.92 g

The mass of H₂SO₄ produced can be obtained as illustrated below:

SO₃ + H₂O -> H₂SO₄

From the balanced equation above,

80 g of SO₃ reacted to produce 98 g of H₂SO₄

Therefore,

6.58 g of SO₃ will react to produce = (6.58 × 98) / 80 = 8.06 g of H₂SO₄

Thus, the mass of H₂SO₄ produced is 8.06 g

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The value of x should be 1/9.

The proportion of Californians who are elderly is 0.111.

The probability that a person has received a vaccine shot given that the person is elderly is 70%

The probability that a person has received a vaccine shot given that the person is not elderly is 2%

Probability that a person is elderly given that the person has received a vaccine shot is to be calculated.

Probability that a person is elderly and has received a vaccine shot,

P(E and V)=P(V | E) P(E)P(V | E) = 70%, P(E) = 0.111, soP(E and V) = (0.7) (0.111) = 0.0777

Probability that a person has received a vaccine shot, P(V) = P(E and V) + P(NE and V) P(NE) = (0.7) (0.111) + P(NE and V) P(NE) = 0.0777 + P(NE and V)P(NE and V) = P(V | NE) P(NE)P(V | NE) = 2%, soP(NE and V) = (0.02) (1 - 0.111) = 0.0178P(V) = 0.0777 + 0.0178 = 0.0955

Probability that a person is elderly given that the person has received a vaccine shot, P(E | V) = P(E and V) / P(V) = 0.0777 / 0.0955 = 0.8148(a) P(Bc|A) is the probability of driver’s blood alcohol percentage is not exceeding the legal limit, given that the breath analyzer indicates that legal limit is exceeded.

(b) We know that P(A|B) = P(Ac|Bc) = 0.95 and P(B) = 0.05P(A) = 1 - P(Ac) = 1 - 0.95 = 0.05P(Bc|A) = P(Ac|Bc) P(Bc) / P(A)P(Bc) = 1 - P(B) = 1 - 0.05 = 0.95P(Bc|A) = 0.95 × 0.95 / 0.05 = 18.05(c) P(B|A) = x and P(A) = 0.05P(Ac) = 0.95, P(B|Ac) = 0P(B|A) = P(B and A) / P(A)P(B and A) = P(B|A) P(A) = x (0.05)P(Bc|Ac) = 1 - x = P(Ac|Bc) = P(Bc|Ac) P(Ac) / P(Bc) = (1 - x) (0.95) / 0.95P(B) = P(B and A) + P(B and Ac) = x (0.05) + (1 - x) (0.95) = 0.95 - 0.9 x

Therefore,0.9 x = 0.95 - 0.05x = 1/9

Hence, the value of x should be 1/9.

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provides oxygen to the blood

Answer:

Explanation:

Kinetic energy is the energy possessed by an object due to its motion. If an object is moving, then it has kinetic energy. If an object has kinetic energy, then it is moving. Many students confuse kinetic energy with potential energy.

Answer:

the first one

Explanation:

I take this subject

Answer:

The most vigorous reaction, between two elements for the formation of an ionic compound, in theory, would be between the most electronegative element and the least electronegative element, Fluorine and Francium respectively, according to the Pauling scale. So it would be 2Fr + F2 ->2FrF. But for a more practically reasonable choice, because Francium has a very short half-life, would be Caesium and Fluorine because Caesium is just right above Francium, being in the same group (Group 1 / IA). 2Cs + F2 -> 2CsF. In both cases, the outermost electron of the Caesium/Francium atom will be taken by the Fluorine atom, in the process, releasing a massive amount of energy.

Explanation:

Although chemical reactions can involve any of the other hundred-plus elements on the periodic table, it turns out that most of the familiar energy-releasing reactions involve only hydrogen, carbon, and oxygen. Consider again the reaction, which involves only hydrogen and oxygen atoms. Metals often react with nonmetals to form ionic compounds. These compounds are composed of positive and negative ions formed by adding or subtracting electrons from neutral atoms and molecules. Nonmetals combine with each other to form covalent compounds, which exist as neutral molecules.

Answer:

4752 ft/min.

Explanation:

The following data were obtained from the question:

Speed (in mph) = 54 mph

1 mile = 5280 feet

1 hour = 60 minutes

Speed ( in ft/min) =?

Next, we shall convert 54 mph to ft/h. This can be obtained as follow:

1 mph = 5280 ft/h

Therefore,

54 mph = 54 mph × 5280 ft/h / 1 mph

54 mph = 285120 ft/h

Finally, we shall convert 285120 ft/h to ft/min. This can be obtained as follow:

1 ft/h = 1/60 ft/min

Therefore,

285120 ft/h = 285120 ft/h × 1/60 ft/min / 1 ft/h

285120 ft/h = 4752 ft/min

From the calculations made above, 54 mph is equivalent to 4752 ft/min.

Answer:

Br

Explanation:

The chemical formula Mn₂(CO₃)₃ represents a compound composed of manganese (Mn) and carbonate (CO₃) ions and contains 2 manganese atoms, 9 carbon atoms, and 9 oxygen atoms.

To determine the number of atoms of each element in the compound, we need to break down the formula and analyze the subscripts.

Breaking down the formula

- Mn₂ indicates that there are two manganese atoms in the compound.

- (CO₃)₃ indicates that there are three carbonate ions in the compound. Each carbonate ion consists of one carbon atom (C) and three oxygen atoms (O).

Analyzing the carbonate ion

Since there are three carbonate ions in the compound, we need to multiply the number of atoms in each ion by three:

- There are three carbon atoms (C) in each carbonate ion, so in total, there are 3 x 3 = 9 carbon atoms.

- There are three oxygen atoms (O) in each carbonate ion, so in total, there are 3 x 3 = 9 oxygen atoms.

Summing up the atoms

- Manganese (Mn): 2 atoms

- Carbon (C): 9 atoms

- Oxygen (O): 9 atoms

Therefore, the compound Mn₂(CO₃)₃ contains 2 manganese atoms, 9 carbon atoms, and 9 oxygen atoms.

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Explanation:

the answer is letter A. mitosis

The definition of a mole is the mass of a particular substance in kilos divided by the material's molar mass in grams per mol. Mathematically, the number of moles equals the molar mass of the substance in grams.

Molars are termed after the task they carry out, similar to incisors. The Latin word "mola," which meaning millstone, is the root of the term "molar." Your mouth's molars, which are found close to the back, grind food in the same way a mill grinds wheat into meal.

As a result, if something were to happen to a permanent tooth after it had developed, a new tooth would not develop to replace it. But don't be concerned. The various components of adult teeth are often durable enough to last. For instance, the exterior of the tooth, the enamel.

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Answer:

oxygen ?

Explanation:

not sure but I think so

Aerobic cellular respiration requires an adequate supply of oxygen. In the presence of oxygen, the cell completely oxidised the glucose molecule to form ATP.

In cellular respiration, the cell takes glucose and breaks it down to form energy. Cellular respiration is of two types: aerobic respiration and anaerobic respiration.

In aerobic respiration, the cell requires oxygen. Due to the presence of oxygen, the complete oxidation of glucose takes place. Glucose is converted into pyruvic acid and then enters the Krebs cycle and the electron transport chain to make ATP.

In the aerobic cellular respiration process, the maximum amount of ATP is derived. In anaerobic respiration, the cell performs respiration without the presence of oxygen. An example is glycolysis.

In this glycolysis process, the complete oxidation of glucose does not take place. In the absence of oxygen from pyruvate, lactic acid and ethanol are produced. This is called fermentation.

Hence, for aerobic cellular respiration, oxygen is required.

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Among the compounds you listed, only Al2O3 (aluminum oxide) will form a unit cell similar to K3P (potassium phosphide).

K3P is an ionic compound composed of potassium cations (K+) and phosphide anions (P3-). It crystallizes in a cubic unit cell with a specific arrangement of ions.

Al2O3, also known as alumina, is another ionic compound that forms a crystal lattice structure. It consists of aluminum cations (Al3+) and oxide anions (O2-). Al2O3 can crystallize in different crystal structures, such as the corundum structure or the spinel structure, depending on the conditions.

The other compounds you listed (Na3N, Li2S, Ki, CaBr2) do not have the same ionic composition or structure as K3P. Therefore, their unit cells would be different from K3P.

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Approximately 2 half-lives have passed since the rock formed.

Based on the information provided, the rock contains 8 parent atoms and 24 daughter atoms. To determine the number of half-lives that have passed since the rock formed, we can use the formula:

N = N0 * (1/2)^n

Where N is the current number of parent atoms (8), N0 is the initial number of parent atoms, and n is the number of half-lives.

Since there are 24 daughter atoms and 8 parent atoms, the initial number of parent atoms (N0) is 8 + 24 = 32. Now we can solve for n:

8 = 32 * (1/2)^n

Dividing both sides by 32:

1/4 = (1/2)^n

Since (1/2)² = 1/4, the number of half-lives (n) that have passed is 2.

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Answer:

C) Physical and chemical properties

Answer:

physical and chemical properties

Explanation:

Have a great day :D

For the first question, we need to use the given mass of one oxygen atom to calculate the mass of 1 mole of oxygen atoms. We can use Avogadro's number, which tells us that there are 6.022 × 10^23 atoms in 1 mole.
Therefore, 3.1 moles of oxygen atoms have a mass equal to the mass of a glass of water (2 significant digits).

The mass of 1 mole of oxygen atoms can be calculated using Avogadro's number (6.022 × 10^23 atoms/mol). To find the mass of 1 mole, multiply the mass of a single oxygen atom by Avogadro's number:
(2.66 × 10^-23 g/atom) × (6.022 × 10^23 atoms/mol) = 16.0 g/mol
So, 1 mole of oxygen atoms has a mass of 16.0 g (3 significant digits).
To find how many moles of oxygen atoms have a mass equal to the mass of a glass of water, first convert the mass of the glass of water to grams:
0.050 kg × (1000 g/kg) = 50 g
Next, divide the mass of the glass of water by the mass of 1 mole of oxygen atoms:
50 g / (16.0 g/mol) = 3.1 mol
Therefore, 3.1 moles of oxygen atoms have a mass equal to the mass of a glass of water (2 significant digits).

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