If the pressure of 16 moles of ideal gas is 690 mmHg, and the volume is 1 L, what is the temperature in Kelvin

Answer:  

Sodium metaborate: sodium+boron+oxygen= NaBO 2.

The formula can be written also as Na 2O·B

Explanation:

Answer:

Non-aromatic

Explanation:

The compound clearly is not cyclic, thus can not be considered amongst compounds that are aromatic or semi-aromatic.
Hence, it should be non-aromatic.

Answer:

B.K2(OH)2 i think that is the answer

Answer:zinc

Explanation:

Answer:

The given equation is not balanced.

On the left-hand side, there are 3 atoms of potassium (3K), 3 atoms of bromine (3Br), and 1 atom of iron (Fe).

On the right-hand side, there is 1 atom of bromine (Br), 3 atoms of potassium (3K), and 1 atom of iron (Fe).

The number of atoms of each element should be equal on both sides of the equation. Therefore, to balance the equation, we need to adjust the coefficients of the molecules.

The balanced equation is:

3kBr + FeCl3 -> FeBr3 + 3KCl

The balanced equation has 3 atoms of potassium (3K), 3 atoms of bromine (3Br), 1 atom of iron (Fe), and 3 atoms of chlorine (3Cl) on both sides of the equation.

1. It is also known as the dark reaction of photosynthesis: Off.

2. Primary acceptor of carbon is Photosystem I and II: On.

3. Site of the process is in the stroma: Off.

4. Photolysis of water does not occur: Off.

5. Process type is both cyclic and non-cyclic processes: On.

6. It is a release of oxygen that gives off aldehydes and hydrogen upon dehydrogenation: On.

7. It is a process that converts solar energy into chemical energy: On.

8. It is a light dependent process: On.

9. Process type is cyclic only: Off.

10. Primary acceptor of carbon is Rubiscobisphosphate: Off.

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program to display the population for each of the next five years. Assume the current population is 312,032,486 and a year consists of 365 days:

public class Exercise_11 {

  public static void main(String[] strings) {

      double birthRateInSeconds = 7.0;

      double deathRateInSeconds = 13.0;

      double newImmigrantInSeconds = 45.0

      double currentPopulation = 312032486;

      double secYears = 60 * 60 * 24 * 365;

      double numBirths = secondsInYears / birthRateInSeconds;

      double numDeaths = secondsInYears / deathRateInSeconds;

      double numImmigrants = secondsInYears / newImmigrantInSeconds;

      for (int i = 1; i <= 5; i++) {

          currentPopulation += numBirths + numImmigrants - numDeaths;

          System.out.println("Year " + i + " = " + (int)currentPopulation);

      }

  }

}

A population is the entire collection of humans, whether that group is a nation or a group of people who share a feature. A population in statistics is the group of people from which a statistical sample is taken for a research. Population refers to the total number of people who live in a specific place at any one moment.

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Answer:

D.

Explanation:

Because if an object is more dense than water it will sink.

Answer:

1. To find the pH of a 0.1 M solution of HNO₂, we first need to calculate the concentration of H+ ions in the solution using the dissociation constant K.

HNO₂ ⇌ H+ + NO₂-

K = [H+][NO₂-]/[HNO₂]

We know that the initial concentration of HNO₂ is 0.1 M, and that the dissociation constant K is 4.5×10^-4. Let x be the concentration of H+ ions in the solution.

K = [H+][NO₂-]/[HNO₂]

4.5×10^-4 = x(0.1-x)/0.1

Simplifying the equation gives us:

x^2 - 4.5×10^-5x + 4.5×10^-6 = 0

Using the quadratic formula, we get:

x = (4.5×10^-5 ± √(4.5×10^-5 - 4(1)(4.5×10^-6))) / 2(1)

x = 1.5×10^-3 or 3×10^-4

Since the concentration of H+ ions must be less than 0.1 M, we reject the larger value and take x = 3×10^-4 M.

To calculate the pH, we use the formula:

pH = -log[H+]

pH = -log(3×10^-4) = 3.52

2. To find the pH of a 0.05 M solution of NHẠOH, we first need to calculate the concentration of OH- ions in the solution using the dissociation constant K.

NHẠOH ⇌ NH₂- + OH-

K = [NH₂-][OH-]/[NHẠOH]

We know that the initial concentration of NHẠOH is 0.05 M, and that the dissociation constant K is 1.8×10^5. Let x be the concentration of OH- ions in the solution.

K = [NH₂-][OH-]/[NHẠOH]

1.8×10^5 = x(0.05-x)/0.05

Simplifying the equation gives us:

x^2 - 1.8×10^-3x + 9×10^-6 = 0

Using the quadratic formula, we get:

x = (1.8×10^-3 ± √(1.8×10^-3 - 4(1)(9×10^-6))) / 2(1)

x = 9.0×10^-3 or 1×10^-3

Since the concentration of OH- ions must be less than 0.05 M, we reject the larger value and take x = 1×10^-3 M.

To calculate the pOH, we use the formula:

pOH = -log[OH-]

pOH = -log(1×10^-3) = 3

To calculate the pH, we use the formula:

pH + pOH = 14

pH = 14 - pOH = 11

3. To find the pH of a 0.3 M solution of H₂S, we first need to calculate the concentration of H+ ions in the solution using the dissociation constant K.

H₂S ⇌ H+ + HS-

K = [H+][HS-]/[H₂S]

We know that the initial concentration of H₂S is 0.3 M, and that the dissociation constant K is 1.0×10^-7. Let

Explanation:

Answer: 97

Explanation:

The element Ru is Ruthenium which has 44 protons.

In this case, our atom is an isotope with 53 neutrons.

With this information, we can use the mass number formula to find this atom's mass number.

mass number = protons + neutrons

mass number = 44 protons + 53 neutrons

mass number = 97

Explanation:

28.1 g of Sb₄O₆ are reacting with an excess of C to give 17.3 g of Sb and CO. The unbalanced reaction between these compounds is:

__ Sb₄O₆ + __ C ----> __ Sb + __ CO

We have 4 atoms of Sb on the left and just one on the right. The coefficient for Sb must have 4. Also we have 6 atoms of O on the left and just one on the right side of the equation. So the coefficient for CO must be 6.

__ Sb₄O₆ + __ C ----> 4 Sb + 6 CO

All the elements are balanced except from the C. We have 6 atoms on the right side and just one on the left. The coefficient for C must be 6. The balanced equation is:

Sb₄O₆ + 6 C ----> 4 Sb + 6 CO

To find the percent yield we will have to find the theoretical yield, the mass of Sb that should theoretically be produced when 28.1 g of Sb₄O₆ are reacting with excess of C.

First we have to convert 28.1 g of Sb₄O₆ to moles using the molar mass of Sb₄O₆.

molar mass of Sb = 121.76 g/mol

molar mass of O = 16.00 g/mol

molar mass of Sb₄O₆ = 4 * 121.76 g/mol + 6 * 16.00 g/mol

molar mass of Sb₄O₆ = 583.04 g/mol

mass of Sb₄O₆ = 28.1 g

moles of Sb₄O₆ = 28.1 g * 1 mol/(583.04 g)

moles of Sb₄O₆ = 0.0482 moles

Once we know the moles of Sb₄O₆ we can find the moles of Sb produced.

Sb₄O₆ + 6 C ----> 4 Sb + 6 CO

According to the coefficients of the reaction 1 mol of Sb₄O₆ reacting with an excess of C will produce 4 moles of Sb. Then the molar ratio between Sb₄O₆ and Sb is 1 to 4. We can use that relationship to find the number of moles of Sb that are produced in our exercise.

1 mol of Sb₄O₆ = 4 moles of Sb

moles of Sb = 0.0482 moles of Sb₄O₆ * 4 moles of Sb/(1 mol of Sb₄O₆)

moles of Sb = 0.193 moles

To find the theoretical yield we still have to convert these moles into grams using the molar mass of Sb.

molar mass of Sb = 121.76 g/mol

mass of Sb = 0.193 moles * 121.76 g/mol

mass of Sb = 23.5 g = theoretical yield

And finally we can find the % yield for our reaction.

actual yield = 17.3 g

% yield = actual yield/theoretical yield * 100

% yield = 17.3 g/23.5 g * 100

% yield = 73.6 %

Answer: The percent yield for the reaction is 73.6 %.

Answer:

qualitative data :           quantitative data :      

circular in shape            75 colonies ...          

stained purple               200 purple ..

spreads across plate    55 colonies ...          

Explanation:

i got it right :) .

Answer:

Same XD  Have a bless day ^﹏^^O^^O^^O^

Explanation:

The mass, in grams, of one atom of magnesium is 4.040 × 10^-23 g (to 4 significant figures).

Mass of 1 mole of magnesium = 24.32 g

Number of atoms in 1 mole of magnesium = 6.022 × 10²³

We are to calculate the mass of one atom of magnesium.

We can start by finding the mass of one mole of magnesium, which is given as 24.32 g.

1 mole of magnesium contains 6.022 × 10²³ atoms of magnesium, which means the mass of one magnesium atom is equal to the mass of one mole divided by the number of atoms in one mole.

Thus, the mass of one atom of magnesium can be calculated as follows:

Mass of one magnesium atom = mass of 1 mole of magnesium / number of atoms in 1 mole

= 24.32 g / (6.022 × 10²³)

= 4.04 × 10^-23 g

We can express this value in scientific notation to four significant figures as: 4.040 × 10^-23 g.

Therefore, the mass, in grams, of one atom of magnesium is :

4.040 × 10^-23 g (to 4 significant figures).

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If heat is going into the system, then energy must have come out from the surroundings.

If heat is entering a system, it means that the system is gaining thermal energy, which can lead to an increase in temperature, changes in state, or other effects depending on the nature of the system and the heat transfer mechanism.

The first law of thermodynamics, also known as the law of conservation of energy, states that the total amount of energy in a closed system remains constant, and energy can neither be created nor destroyed, only transferred or converted from one form to another.

When heat enters a system, it is either used to increase the internal energy of the system or to perform work, such as moving a piston or driving an electrical generator.

The amount of heat transferred to a system can be quantified using the equation Q = mcΔT, where Q is the heat transferred, m is the mass of the substance, c is its specific heat capacity, and ΔT is the change in temperature.

Therefore, if the system is gaining energy in the form of heat, then the surroundings (the rest of the universe) must be losing that same amount of energy. This is because energy is conserved.

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Substances in which atoms are  held together by polar covalent bonding is b)CsCl.So,correct option is b.

Polar covalent bond is a kind of compound bond where one sets of electrons is shared unevenly between two molecules. For instance, Hydrogen chloride (HCl) particle. The holding of hydrogen and chlorine iotas inclines more towards Cl particles since Cl is more electronegative in nature than hydrogen

Since Cs has one unpair of electron and Cl has five unpair electron. So, both of elements are favorable for formation of covalent bond.

Properties of Polar Covalent Compound

Hence,correct option is B.

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Answer:

1.17 moles H₂SO₄

Explanation:

To find the moles H₂SO₄, you need to multiply the given value by the mole-to-mole ratio. This ratio is made up of the coefficients of the relevant molecules from the balanced chemical equation. It is important to arrange the ratio in a way that allows for the cancellation of units.

S + 6 HNO₃ ------> 1 H₂SO₄ + 6 NO₂ + 2 H₂O
     ^                      ^

7 moles HNO₃          1 mole H₂SO₄
-----------------------  x  ------------------------  =  1.17 moles H₂SO₄
                                  6 moles HNO₃

Answer:

See below

Explanation:

Conversion factor :  1 ft^3  = 28 .317  liters

$ 1.30 /( 17 ft^3 *  28.317 liters/ft^3)    =   $.0027  per liter  

To determine the pH of a solution based on the hydronium ion concentration, you can use the equation:

pH = -log[H₃O⁺]

where [H₃O⁺] is the concentration of hydronium ions.

In this case, the hydronium ion concentration is 6.5x10^-4 M.

Calculating the pH:

pH = -log(6.5x10^-4)

= -log(6.5) - log(10^-4)

= -log(6.5) + 4

Using a calculator or logarithmic tables, you can find that the logarithm of 6.5 is approximately 0.81.

pH ≈ 0.81 + 4

pH ≈ 4.81

Rounding to the nearest whole number, the pH of the solution is approximately 5.

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Answer:

Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat. If there is a temperature difference between two systems heat will always find a way to transfer from the higher to lower system.

Explanation:

Answer:

9.93712g

Explanation:

You have 10mL of water at 33 degrees, so you want to look at the density of water at 33 degrees. Then you multiply that density (.993712) by 10 and the mL cancel out and you are left with 9.93712g.

Hope this helps!

The statement about cells and genes that is false is a) the sequencing of bases within a gene is of little significance.

The sequence of bases is of major significance in an individual and hence option a is false. The sequences of bases in a gene help in the formation of specified proteins that carry out the functioning in an individual. The sequencing of the bases is also important as any change in the bases can cause the wrong proteins to be formed which might cause the ultimate death of an individual if a major kind of protein is not produced.

The sequence of bases also determines if there are chances of any disorder to occur in an individual due to the pattern of bases being changed.

The question will correctly be written as:

Which of the following statements about cells and genes is false? multiple choice

a) the sequencing of bases within a gene is of little significance.

b) each chromosome contains hundreds to thousands of genes.

c) each cell contains 23 pairs of chromosomes.

d) our bodies are made up of about 260 different types of cells.

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Answer:

The edge of its orbital

Explanation:

The size of an atom is defined by the edge of its orbital. However, orbital boundaries are fuzzy and in fact are variable under different conditions

Answer:

lol thx

Explanation:

The force that helps keep the Earth in its orbit around the Sun is the gravitational force.

The Sun has a massive gravitational pull due to its large mass, which causes the Earth to be attracted towards it. This force of attraction is what keeps the Earth in its stable orbit around the Sun.

The gravitational force between the Sun and the Earth is balanced by the Earth's velocity and centrifugal force, which allows it to maintain a stable orbit around the Sun.

The gravitational force is the attractive force that exists between any two objects with mass. The magnitude of the gravitational force between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them.

This means that the larger the mass of the objects and the closer they are to each other, the stronger the gravitational force between them.

In the case of the Earth and the Sun, the Sun is much more massive than the Earth, which means it exerts a much stronger gravitational force on the Earth. The Earth is constantly falling towards the Sun due to the force of gravity.

However, the Earth also has a tangential velocity that keeps it moving in a circular orbit around the Sun. This is known as centrifugal force, which is the force that acts on an object moving in a circular path, pulling it away from the center of the circle.

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The heat required is to convert 75.0 g of C₂Cl₃F₃ from a liquid at 13.60 ∘C to a gas at 76.00 ∘C is 17.55 kJ.

To solve this problem, we need to consider the different steps involved in the process of converting 75.0 g of C₂Cl₃F₃ from a liquid at 13.60 ∘C to a gas at 76.00 ∘C;

Heating the liquid C₂Cl₃F₃ from 13.60 ∘C to its boiling point at 47.6 ∘C, Vaporizing the liquid C₂Cl₃F₃ at its boiling point, and heating the resulting gas from 47.6 ∘C to 76.00 ∘C

Now, we can use the equations to calculate the heat required for each step;

q₁ = m × C₁ × ΔT₁

where q₁ is the heat required, m is the mass of C₂Cl₃F₃, C₁ is the specific heat of C₂Cl₃F₃(l), and ΔT₁ is the temperature change from 13.60 ∘C to 47.6 ∘C.

q₁ = 75.0 g × 0.91 J/g⋅K × (47.6 ∘C - 13.60 ∘C)

= 2466 J

q₂ = n × ΔHvap

where q₂ is the heat required, n is the number of moles of C₂Cl₃F₃, and ΔHvap is the heat of vaporization of C₂Cl₃F₃.

n = m/M

= 75.0 g / 137.37 g/mol

= 0.5464 mol

q₂ = 0.5464 mol × 27.49 kJ/mol

= 15.038 kJ

q₃ = m × C₂ × ΔT₂

where q₃ is the heat required, m is the mass of C₂Cl₃F₃(g), C₂ is the specific heat of C₂Cl₃F₃(g), and ΔT₂ is the temperature change from 47.6 ∘C to 76.00 ∘C.

m = n × M

= 0.5464 mol × 137.37 g/mol

= 75.0 g

q₃ = 75.0 g × 0.67 J/g⋅K × (76.00 ∘C - 47.6 ∘C)

= 1446 J

The total heat required is the sum of the heats required for each step;

\(q_{total}\)= q₁ + q₂ + q₃

= 2466 J + 15.038 kJ + 1446 J

= 17.55 kJ

Therefore, the total heat required is 17.55 kJ.

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Answer:

Pressure = 2324.08 mmHg

Explanation:

We are given

Volume = 10L

No of moles = 1.26

Temperature = 23degree = 296k

Pressure = ?

using the ideal gas equation

PV = nRT

P = nRT/V

P = \(\frac{1.26*0.082*296}{10}\)  = 3.058atm

1 atm = 760mmHg

Pressure = 2324.08 mmHg

The molecular weight of unknown gas : 23.46 g/mol

Given

A vessel contains 10% of oxygen and 90% of an unknown gas.

diffuses rate of mixed gas = 86 s

diffuses rate of O₂ = 75 s

Required

the molecular weight of unknown gas (M)

Solution

The molecular weight of mixed gas :(M O₂=32 g/mol)

\(\tt 0.1\times 32+0.9\times M=3.2+0.9M\)

Graham's Law :

\(\tt \dfrac{r_{O_2}}{r_{mixed~gas}}=\sqrt{\dfrac{M_{mixed}}{M_{O_2}} }\\\\\dfrac{75}{86}=\sqrt{\dfrac{3.2+0.9M}{32} }\\\\0.76=\dfrac{3.2+0.9M}{32}\\\\24.32=3.2+0.9M\\\\21.12=0.9M\rightarrow M=23.46~g/mol\)

To prepare a 0.12 M solution of FeCl₃, the amount of solid FeCl₃ to be dissolved in a given volume of solvent will be 9.72 grams.

Given,

Molarity of FeCl₃ (M)= 0.12 M

The molecular weight (m) of FeCl₃ is  = 162 gm

The volume of the solution (V) to be prepared is =500 ml

The amount of FeCl₃ to be dissolved to make a 0.12 M solution is= x

So,

MV= x ÷ m × 1000

0.12× 500 = x ÷ 162 × 1000

x = 60 × 162 ÷ 1000

x= 9.72 gm

So 9.72 grams of FeCl₃ is dissolved to make 500 ml of 0.12 M solution.

For preparing 0.4 M HCl from 4M HCL:

If we need to make 500 ml of solution with 0.4M of HCL, then we use the formula:

M₁V₁= M₂V₂

0.4 × 500= 4 × x

x= 50 ml

So 50 ml of 4M HCL is taken to make 0.4 M HCL.

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