Elementary analysis showered that an organic compound contained c, h, n and o as the only elementary constituent. a 1.279g sample was burnt completely as a result of which 1.6g of co2, 0.77g of h2o were obtained. a separately weighted of nitrogen. what is the empirical formula of the compound?

5 fl oz stands for 5 fluid ounces. Fluid ounces are a unit of measurement for liquid volume. One fluid ounce is equal to approximately 29.57 milliliters.

When measuring liquids, it's important to use the correct units to ensure accurate measurements.

In cooking and baking, recipes often call for specific measurements of liquids, such as 5 fl oz of milk or 2 fl oz of vinegar. These measurements are important to ensure that the recipe turns out correctly. If too much or too little of a liquid is used, it can change the texture, taste, and overall outcome of the dish.

In terms of bottle sizes, you might see 5 fl oz bottle of shampoo or lotion. In this context, 5 fl oz refers to the amount of product that the container holds. This information can be helpful when comparing prices or determining how long a bottle will last.

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Answer:

Her speed is 6.8m/s.

Explanation:

K.E= 1/2mv²

or, 2543.2= 1/2×110×v²

or, 2543.2 = 55v²

or, 2543.2/55 = v²

or, 46.24 = v²

or, 6.8² = v²

v = 6.8 m/s

answer

6.8

explanation

k.e=1/2v^2

2543.2=55v^2

46.24=v^2

6.8^2=v^2

v=6.8

Answer:

0.659

Explanation:

n(NH3)/n(N2)=4/5

n(NH3)=4/5×0.824 =0.659

Answer:

respritory and circulatory systems

lungs and heart

Explanation:

The molar mass of element X is 65.1 g/mol.

First, let's find the mass of element X in the sample.

Since the sample contains 14.4 g of oxygen atoms and the total mass of the sample is 59.4 g, the mass of element X in the sample is 59.4 g - 14.4 g = 45 g.

Now, we know that the compound has a formula of X4O6, which means there are 4 moles of X for every 6 moles of O. The molar mass of oxygen is 16 g/mol, so the total mass of oxygen in the compound is 6 * 16 g/mol = 96 g/mol. Therefore, the molar mass of 4 moles of element X is the total mass of the compound minus the mass of oxygen: (4 * Molar mass of X) = (59.4 g/mol - 96 g/mol).

Solving for the molar mass of X, we get (4 * Molar mass of X) = -36.6 g/mol, so the molar mass of X is -36.6 g/mol / 4 = 65.1 g/mol.

Summary: The molar mass of element X in the compound X4O6 is 65.1 g/mol, given a 59.4 g sample containing 14.4 g of oxygen atoms.

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The simple electronic configuration of bromine can be written as:

[ Ar ] 4s2 3d10 4p5.

electronic configuration, additionally called electronic structure or electron configuration, the association of electrons in orbitals around an atomic nucleus. The electronic configuration of an atom within the quantum-mechanical model is stated by using list the occupied orbitals, in order of filling, with the variety of electrons in each orbital indicated by superscript. on this notation, the electronic configuration of sodium would be 1s²2s²2p⁶3s¹, distributed in the orbitals as 2-8-1. frequently, a shorthand technique is used that lists simplest those electrons in excess of the noble gas configuration right away previous the atom within the periodic table. for example, sodium has one 3s electron in extra of the noble gas neon (chemical symbol Ne, atomic number 10), and so its shorthand notation is [Ne]3s1.

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1) Chemical formula

2) Mg Lewis structure

3) O2 Lewis structure

4) MgO Lewis structure

5) Chemical formula written as Lewis dot structure

.

Answer: By the very laws of the universe, matter cannot be created or destroyed, the Big Bang cannot have happened by its own power. There was a creator involved.

Answer:

Simple distillation for salt and water

Explanation:

Answer:

it is alkali

Explanation:

hope it helps you

The statement "molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in the direction of molecular movement" is true.

When a heat engine is heated, molecules absorb heat energy and their kinetic energy increases. The kinetic energy of molecules causes them to move around. However, this movement is not uniform, and the molecules move in random directions.

A heat engine is a device that converts thermal energy into mechanical energy. Heat engines operate on the principle of thermodynamics.

They work by taking in thermal energy from a high-temperature reservoir, converting some of it into mechanical energy, and then releasing the remaining thermal energy to a low-temperature reservoir.The internal combustion engine in a car, the steam engine in an old locomotive, and the turbine in a power plant are all examples of heat engines. They all convert heat energy into mechanical energy to perform work.

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Answer:

are electrons causing the ion to have a positive charge and anions are electrons that have a negative charge

Explanation:

Answer:

both a and b

Explanation:

here you go. kindly check attatchement

Answer: Yes

Explanation:

Air is matter because it takes up space, has weight and is composed of particles.

1.11 grams of hf must be dissolved in water to create 762 ml of a solution with a ph of 2.13.

To solve this problem, we need to use the balanced chemical equation for the dissociation of hydrofluoric acid (HF) in water:

HF + \(H_2O\) ↔ \(H_3O^+\) + \(F^-\)

The dissociation of HF in water is a weak acid-base reaction, and the acid dissociation constant, Ka, for HF is 6.8 × \(10^{-4\).

The pH of a solution of HF can be calculated using the equation:

pH = -log\([H_3O^+]\)

Since we know the pH of the solution is 2.13, we can calculate the concentration of \([H_3O^+]\):

\([H_3O^+]\) = \(10^{-pH\)

\([H_3O^+]\)= \(10^{-2.13\)

\([H_3O^+]\) = 6.13 × \(10^{-3\) M

The equilibrium constant expression for the dissociation of HF is:

Ka = \([H_3O^+][F^-]/[HF]\)

Since the concentration of \(F^-\)is equal to the concentration of HF (since HF dissociates to give one \(H^+\) ion and one \(F^-\) ion), we can simplify the expression to:

Ka =  \([H_3O^+]^2\) /[HF]

Solving for [HF], we get:

[HF] = \([H_3O^+]^2\) /Ka

[HF] = \((6.13 \times 10^{-3} M)^2/6.8 \times 10^{-4}\)

[HF] = 5.53 × \(10^{-2\) M

Now we can use the concentration and volume of the solution to calculate the mass of HF needed to create the solution:

mass of HF = molar mass of HF × moles of HF

mass of HF = 20 g/mol × 5.53 × \(10^{-2\) mol

mass of HF = 1.11 g

Therefore, 1.11 grams of HF must be dissolved in water to create 762 ml of a solution with a pH of 2.13.

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The mass of HF that must be dissolved in water to produce 762 ml of a solution with a pH of 2.13 is 0.113 g.

The mass of HF that must be dissolved in water to produce 762 ml of a solution with a pH of 2.13 is calculated as follows:

The equation of the dissociation of HF is:

HF (aq )⇄ H+ (aq) + F- (aq)

Ka for HF =  6.8 x 10⁻⁴

pH = 2.13,

[H+] = \(10^{-pH}\)

[H+] = \(10^{-2.13}\)

The number of moles of HF required will be;

Moles of HF = Concentration of HF (mol/L) × Volume of Solution (L)

Concentration of HF = [H+] = \(10^{-2.13}\)

The volume of Solution = 726 mL or 0.762 L

Moles of HF = \(10^{-2.13}\) × 0.762

Moles of Hf = 0.00564 moles

Mass of HF = Moles of HF × Molar Mass of HF

the molar mass of HF = 20.01 g/mol:

Mass of HF = 0.00564 moles × 20.01

Mass of HF = 0.113 g

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Unit conversions used for unit conversions are used to write very large numbers.

Unit conversion is the process of converting the measurement of a given amount between various units, often by multiplicative conversion factors that alter the value of the measured quantity without altering its effects. The term "conversion" describes the procedure of altering or converting a word's class without altering its form.

Even if it was solely used as a noun in the past, the term "email" is now a verb in Modern English. The measurement's unit is crucial. We can learn about a thing's property through measuring. It provides information about an object's weight or length. We can assign a number to that property using a measurement.

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Unit conversions used for unit conversions are used to write very large numbers.

Unit conversion is the process of converting the measurement of a given amount between various units, often by multiplicative conversion factors that alter the value of the measured quantity without altering its effects. The term "conversion" describes the procedure of altering or converting a word's class without altering its form.

Even if it was solely used as a noun in the past, the term "email" is now a verb in Modern English. The measurement's unit is crucial. We can learn about a thing's property through measuring. It provides information about an object's weight or length. We can assign a number to that property using a measurement.

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The molecular formula of the organic acid is C₂H₄O₄.

Assuming we have a 100 gram sample of the organic acid, we can calculate the masses of carbon, hydrogen, and oxygen present in the sample as follows:

Mass of C = 39.9 g

Mass of H = 6.7 g

Mass of O = 53.4 g

Next, we can convert these masses to moles using the atomic masses of each element,

Moles of C = 39.9 g / 12.01 g/mol = 3.32 mol

Moles of H = 6.7 g / 1.01 g/mol = 6.63 mol

Moles of O = 53.4 g / 16.00 g/mol = 3.34 mol

We then divide each mole value by the smallest mole value to get the simplest whole-number ratio of atoms,

Moles of C / Moles of O = 3.32 mol / 3.34 mol = 0.993

Moles of H / Moles of O = 6.63 mol / 3.34 mol = 1.98

Rounding these ratios to the nearest whole number gives us the empirical formula of the organic acid, which is C₁H₂O₂.

To find the molecular formula, we need to know the molar mass of the compound. We are given that the molar mass of the composition is 60.0 g/mol. The empirical formula C₁H₂O₂ has a molar mass of approximately 45.0 g/mol (1 × 12.01 g/mol for C, 2 × 1.01 g/mol for H, and 2 × 16.00 g/mol for O). To determine the molecular formula, we divide the molar mass of the compound by the molar mass of the empirical formula and round to the nearest whole number.

Molecular formula = (Molar mass of composition) / (Molar mass of empirical formula)

Molecular formula = 60.0 g/mol / 45.0 g/mol

Molecular formula = 1.33

Rounding this value to the nearest whole number, we get a molecular formula of C₂H₄O₄.

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Answer:

A,C

Explanation:

Because the other question deal with convection but A,D show how the warm and cold water travel .

The concentration of A and B after 80 s  if the initial concentration of ab is 0.260 m, and the reaction mixture initially contains no products is 0.0091 M.

To find the concentrations of A and B after 80 s, we must write the kinetic data is given as follows for the reaction:

AB ⟶ A + B

Initial rate of the reaction is 1.62 x 10⁻³ mol/L/s

Order of reaction for AB is first order (n = 1). Now, using the first-order rate equation, the concentration of AB at time t, [AB]t can be calculated as follows:

ln [AB]0/[AB]t = k

tHere, [AB]0 is the initial concentration of AB, [AB]t is the concentration of AB at time t, k is the rate constant, and t is the time interval.

To determine the rate constant, we can use the initial rate of reaction.

Initial rate, ri = k[AB]n

Here, n is the order of reaction.

So, k = ri/[AB]n

Substituting the given values:

ri = 1.62 x 10⁻³ mol/L/s[AB]0

= 0.260 mk = ri/[AB]n

= 1.62 x 10⁻³ mol/L/s / (0.260 m)1

= 6.23 s-1

Now, we can use the rate constant to determine the concentration of AB at 80 seconds:

ln [AB]0/[AB]80 = kt

Here, k = 6.23 s-1, [AB]0 = 0.260 m, and t = 80 s.

Substituting the values:

ln (0.260 m)/[AB]80

= (6.23 s-1) (80 s)[AB]80

= [AB]0 e-kt

= (0.260 m) e-(6.23 s-1) (80 s)

= 0.0091 m

Now, since the stoichiometry of the reaction is 1:1, the concentration of A and B will be equal to each other. Therefore, [A]80 = [B]80 = 0.0091 m.

Thus, the final concentrations of A and B are 0.0091 M after 80 seconds.

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The source of pollution to look for when trying to ensure clean air in your home includes formaldehyde, radon, and tobacco smoke; nitroglycerine is not a typical source of indoor air pollution.

Formaldehyde is commonly found in many household products, such as adhesives, paints, and furniture made of composite wood. It can irritate the eyes, nose, and throat, and prolonged exposure has been linked to cancer. Radon is a radioactive gas that can seep into homes from the ground and can cause lung cancer. Tobacco smoke is a major indoor air pollutant that contains over 7,000 chemicals, including 70 known carcinogens. It can cause respiratory and cardiovascular problems, and even non-smokers can be affected by secondhand smoke. Nitroglycerine, on the other hand, is a highly explosive substance and is not commonly found in homes as a source of air pollution.

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The weight percent of NaBr  in this solution is 150% and the mole fraction of NaBr in this solution will be 1.5.

Weight percent is a measure of the amount of solute (in this case, NaBr) in a solution relative to the total weight of the solution.

Weight percent (w/w) = (mass of solute / total mass of solution) x 100

In this case, the solution is 1.5 M NaBr, so we can calculate the mass of the solute:

mass of solute = molarity x molecular weight of solute

mass of solute = 1.5 M x 102 g/mol

mass of solute = 153 g

The total mass of the solution calculated as:

total mass = mass of solute / molarity

total mass = 153 g / 1.5 M

total mass = 102 g

Now we calculate the weight percent:

Weight percent (w/w) = (mass of solute / total mass of solution) x 100

Weight percent (w/w) = (153 g / 102 g) x 100

Weight percent (w/w) = 150%

The mole fraction of a solute is the ratio of the number of moles of the solute to the total number of moles in the solution.

The number of moles of NaBr can be calculated as:

number of moles of NaBr = mass of NaBr / molecular weight of NaBr

number of moles of NaBr = 153 g / 102 g/mol

number of moles of NaBr = 1.5 mol

And the total number of moles in the solution can be calculated as:

total number of moles = number of moles of NaBr / molarity

total number of moles = 1.5 mol / 1.5 M

total number of moles = 1.0 mol

Now we calculate the mole fraction:

Mole fraction = 1.5 mol / 1.0 mol

Mole fraction = 1.5

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Answer:

2.764 °C

Explanation:

ΔT = 2 x 1.86 C/m x 0.743m = 2.764C That means the freezing point of the solution is 2.764C less than the pure solvent (water)

The Pauli exclusion principle explains the periodic table by stating that no two electrons in an atom can have the same set of quantum numbers.

In more detail, the periodic table organizes elements based on their atomic number, which represents the number of protons in an atom's nucleus. Each element consists of a unique arrangement of electrons around the nucleus. The Pauli exclusion principle, formulated by Wolfgang Pauli, states that within an atom, no two electrons can have the same set of quantum numbers.

Quantum numbers describe various properties of electrons, such as their energy, orbital shape, and orientation. According to the principle, each electron must have a distinct combination of quantum numbers, including the principal quantum number (n), the azimuthal quantum number (l), the magnetic quantum number (m), and the spin quantum number (s). This means that in a given atom, electrons occupy different energy levels and subshells, contributing to the observed patterns in the periodic table. The principle helps explain the filling order of atomic orbitals and the organization of elements into periods and groups based on their electronic configurations. It also plays a crucial role in understanding chemical bonding and the properties of elements.

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Answer:

the answer is b

Explanation:

the answer is b

Compound of KCl has a polar bond as there is a electronegativity difference between potassium and chlorine atoms.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.

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The number of unpaired electrons (s) in the [Co(NH3)6] 3 ion  is   0  and shows a low spin

[Co(NH3)6]3+

First, let us find the oxidation state of the Co

let Co = x; NH3 = neutral ligand

x+0=+3

x=+3

Atomic no.of Co is 27

The electronic configuration of Co is 3d7 4s2

Excited state:- Co3+= 3d6 4s0

with Co every ligand act as a strong ligand so here NH3 act as a strong ligand and a pairing of the electron will occur. and shows low spin

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Answer:

When a liquid is 140° F it really only takes five or less seconds to produce a serious burn.

Energy is taken in by a system from its surroundings during endothermic reactions. In a chemical equation or reaction, this means that the products will have more energy than the reactants.

Exothermic means that the chemical reaction releases energy. In exothermic reactions, bonds are broken in the reactants, but more energy is expended when the bonds are broken in the products. Endothermic chemical processes are those that take in energy.

Reactions that are endothermic are the reverse of those that are exothermic. Their surroundings heat them up, which they absorb. Therefore, endothermic reactions result in a cooler environment around them. This sort of interaction is demonstrated by the melting of ice.

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Answer:

22.75 L CO2

Explanation:

Balance the Equation

C5H12  +  O2 ==>   CO2 + H2O        Balance the Carbons

C5H12  +  O2 ==>   5CO2 + H2O     Now balance the Hydrogens

C5H12  +  O2 ==>   5CO2 + 6H2O   Now count up the oxygens on the right.

5*O2 + 6O ==> 10 O + 6 O ===> 16 Oxygens.

You have 2 on the left. You have to multiply the oxygens by 8

C5H12  +  8O2 ==>   5CO2 + 6 H2O

The equation is now balanced.

Now find out how much oxygen is needed to burn 9.32 L of Pentane

1 Liter Pentane / 8 Liters Oxygen = 9.32 L Pentane / x     Cross multiply

x = 8 * 9.32

x = 74.56

Read this next sentence very carefully. You need 74.56 Liters of oxygen to burn all the pentane you have. There's not that much there. You only have 36.4 Liters of Oxygen. Some of the pentane won't get burned. Consequently there will be a shortage of CO2 as well.

Find out the number of Liters of Pentane that will be burned up.

1 / x =  8 / 36.4               Cross multiply

8x = 36.4                        Divide by 8

8x/8 = 36.4/8

x = 4.55 Liters of Pentane will be  used up.

Find the number of Liters of CO2

For every Liter of Pentane, 5 Liters of CO2 will be produced.

1/5 = 4.55/x                      Cross Multiply

x = 5 * 4.55

x = 22.75