when leadii nitrate solution is added to sodium bromide solution, solid leadii bromide forms and sodium nitrate solution remains. be sure to include the state of each reactant and product in the equation.

The molecular formula of the compound is [tex]C_{4} H_{8}[/tex]

We can calculate the empirical formula from the carbon and hydrogen percentage by assuming that we have 100 g of the substance:
carbon: 85.63 g / 12 g/mol = 7.1358 mol
hydrogen: 14.37 g / 1 g/mol = 14.37 mol
We divide the moles with the smallest amount to get a mole ratio:
7.1358 mol / 7.1358 mol = 1
14.37 mol / 7.1358 mol = 2.01
So the empirical formula is [tex]CH_{2}[/tex], with the molar mass of 12 + 2 * 1 = 14 g/mol.
We can calculate the molar mass of the compound using ideal gas laws. At STP, 1 mol of any gas has a volume of 22.4 L, so:
1 mol : 22.4 L = X : 0.255 L
X = 1 mol * 0.255 L / 22.4 L = 0.0114 mol
From this, we calculate the molar mass of the gas:
0.0114 mol : 0.646 g = 1 mol : X
X = 0.646 g * 1 mol / 0.0114 mol = 56.67 g/mol
To get the molecular formula, we divide the molar mass of the gas by the molar mass of the empirical formula:
56 g/mol / 14 g/mol = 4
So now we multiply the empirical formula by 4 to get the molecular formula:
[tex]C_{4} H_{8}[/tex]

You can learn more about molecular formulas here:
brainly.com/question/28647690

#SPJ4

Answer:   amt of time students studied

Explanation:

10.81 mole of calcium chloride (CaCl2) does a town use daily if it uses 1.2 metric tons a day mole is a standard scientific unit for the calculation of large amounts of very small entities

Here given data is 1 metric ton = 1000 kilograms then 1.2 metric tons = 1200 kilogram then we have to find moles of calcium chloride (CaCl₂) =?

Then here concept are moles, molar mass of a substance is the mass in grams of one mole of that substance

Here given molar mass of (CaCl₂) = 110.98

So, given molar mass of calcium chloride (CaCl₂) / 1200

n = 1200/110.98 = 10.81 mole

So, 10.81 mole of calcium chloride (CaCl2) does a town use daily if it uses 1.2 metric tons a day

Know more about moles

https://brainly.com/question/2150938

#SPJ1

Johnny's percentage error is calculated as= 41%

The quantity of carbon Johnny should have (actual value) = 21.8 g

The quantity of carbon Johnny was able to calculate = 22.7 g

To calculate the percentage error, subtract the actual value from the estimated value. That is,

22.7 - 21.8 g = 0.9 g

This error value obtained is divided by the actual value ( 21.8 g)

0.9 / 21.8 = 0.41

Then multiply by 100%

0.41 × 100.= 41%

Therefore, Johnny's percentage error is calculated as = 41 %

Learn more about percentage here:

https://brainly.com/question/24877689

#SPJ1

Answer:

yea I'm also looking for this question to .

The valence electrons for elements is the number of electrons in their outermost shells.

The valence electrons of atoms of elements are the number of electrons in the outermost shell of the atoms.

The innermost shell of every atom can take a maximum of 2 electrons. Thereafter, all other shells are able to take a maximum of 8 electrons. If the last shell of an atom is not completely filled, the number of electrons on the shell is equivalent to the valence electrons.

For every neutral atom, the number of valence electrons is equivalent to the group the atom belongs to on the periodic table.

Thus, group 1 elements have 1 valence electron, group two elements have 2 valence electrons, and so on.

More on valence electrons can be found here: https://brainly.com/question/13993867

#SPJ1

12.5 mL of 0.400M solution of HCL has the same number of moles of HCL as 25.0 ml of 0.200m solution of HCL.

A unit of measurement for substance amount is the mole. We have a reliable way to translate between atoms/molecules and grams by moles. Molecules can be expressed in terms of volume, the number of atoms or molecules, and molecular mass. A pure material has a molecular mass in grams that are equivalent to 1 mole of that substance.

Multiplying the volume in L by the molarity in mol/L gives moles of HCL

25.0 mL(1L/1000 mL)(0.200mol HCL/1L)

=0.00500 mol HCL in the solution.

For each answer choice, perform the same calculation to identify the correct match.

12.5mL(1L/1000mL)(0.400 mol HCL/1L)

=0.00500 mol HCL

The correct answer is 12.5mL of 0.400M solution of HCL.

To know more about the mole concept, visit:

https://brainly.com/question/1427235

#SPJ1

Answer:

Reduce emissions, make clean energy, stop pollution, drive electric vehicles, and reduce meat consumption

Explanation:

Answer:

1. Save energy at home (heating, electricity)

2. Try walking, biking or taking public transport instead of going in a car or own vehicle

3. Don't waste food

4. Eat more vegetables

5. Try to travel without going on an airplane

Answer:

D

Explanation:

I have a crush on the same and I

A large class of heterocyclic aromatic organic compounds are descended from oxazole. These are azoles, which have one carbon between the oxygen and the nitrogen.

Although less aromatic than thiazoles, oxazole are nonetheless compounds. Since imidazole’s conjugate acid has a pKa of 7, oxazole’s conjugate acid has a pKa of 0.8.

In this study, the most recent research and discoveries on the full spectrum of oxazole compounds as pharmaceuticals—including those with antimicrobial, antifungal, antiviral, antitubercular, anticancer, anti-inflammatory and analgesic properties—were carefully examined.

Because nitrogen is more basic than oxygen, protonation occurs at the sp2 orbital of nitrogen in oxazole. Oxazole’s oxygen atom reduces the

To know more about oxazole visit:

https://brainly.com/question/12994604

#SPJ4

By ideal gas approximation, the mass of the Argon gas in container "b" is 488.6 grams.

We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation

P . V = n . R . T

where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.

From the question above, we know that

Molar mass N₂ = Mr N₂ = 28

Molar mass Ar = Mr Ar = 40

m1 = 69.8 gr

V1 = 4.9 V2

P1 = P2 = P

T1 = T2 = T

Approximate that the gas is ideal, hence the ratio is

P1 . V1 / (n1 . R . T1) = P2 . V2 / (n2 . R . T2)

P . V1 / (m1/MrN₂ . R . T) = P . 4.9V1 / (m2/MrAr . R . T)

Mr N₂ / 69.8 = 4.9 . MrAr / m2

28 / 69.8 = 4.9 . 40 / m2

m2 = 488.6 grams

Find more on ideal gas at: https://brainly.com/question/25290815

#SPJ4

Just as height and breadth are ways to express size, volume is a measure of an object's size.

The area occupied by gaseous particles under normal temperature and pressure circumstances is referred to as the volume of gas. It is identified as a "V. The letter "L" stands for "liters," the SI unit of volume. At normal temperature, a mole of gas has a volume of 24 m3, or 24 000 cm3. The molar volume of a gas is the name given to this quantity. For instance, the formula for calculating the volume of 40 moles of gas at a temperature of 250 K and a pressure of 1013 hPa is V = nRT/p = 40 * 8.31446261815324.

To learn more about volume refer to:

https://brainly.com/question/463363

#SPJ9

Four molecules of HCl are needed to produce four molecules of H₂O.

The number of molecules of of HCl needed to produce four molecules of H₂O is determined from the mole ratio of the reaction as given in the equation of the reaction below:

2 HCl (aq) + Ca(OH)₂ (aq) → CaCl₂ (aq) + 2 H₂O (l)

The mole ratio of the reaction as given in the equation shows that 2 moles of HCl produces 2 moles of water.

Therefore, the mole ratio  of HCl and H₂O is 1 : 1

Four moles of H₂O will be produced by four molecules of HCl

The number of molecules of HCl in 1 mole of HCl is 6.02 * 10²³ molecules.

1 mole of every substance contains equal number of particles.

Hence, 1 mole of water will contain  6.02 * 10²³ molecules.

Based on the mole ratio of the reaction, four molecules of HCl are needed to produce four molecules of H₂O.

Learn more about molecules at: https://brainly.com/question/475709

#SPJ1

Answer:

the option will be no.3

Explanation:

why? because I said so

Number of moles of sodium nitride, NaN₃ needed to produce 3.94 moles of Nitrogen, N₂ is 2.63 moles

Decomposition of sodium nitride is

NaN₃ → Na + N₂

On balancing the given reaction we need to add the necessary coefficients behind the reactants and products

2NaN₃ → 2Na + 3N₂

So, 2 moles of NaN₃  is needed to form = 3 moles of N₂

or 3 moles of N₂ is produced from = 2 moles of NaN₃

1 mole of N₂ is produced from = 2/3 moles of NaN₃

3.94 moles of N₂ of produced from = 3.94 x 2/3 moles of NaN₃

                                                            = 2.63 moles of NaN₃

To know more about moles here

https://brainly.com/question/26416088

#SPJ1

20 is the slope of the given graph

The density of the pure gold is 19.3g/cc. here in this figure it is given that a graph plotted against mass vs volume. the slope is calculated by

y₂-y₁/x₂-x₁ = 0.4-0.1/0.02-0.005

=20

density of the sample is so from the above given data the calculated average density we get it 19.3 which is the pure golds density.

Gold nuggets are naturally occurring pieces of gold in nature. Streams often concentrate nuggets and fine gold in placer gold. Nuggets are obtained from placer mining, but are also found in gold-bearing veins or deposits of weathered deposits.

Learn more about density here https://brainly.com/question/1354972

#SPJ9  

An azeotrope is a composition that has the similar components in the liquid phase as compared to the gas phase . therefore, an azeotropic compositions cannot be separated by distillation.

It is not separated by the distillation or fractional process due to the reason of the when the azeotrope mixture is boiled, the gaseous vapor has the similar proportions of constituents or the components as the unboiled mixture.

It can only be separated by azeotropic distillations. This method is also well known by the AD process.

It is a method to break the azeotropes with the help of various mixture of solvent , or separating agent it forms heterogeneous azeotropes.

To know more about Azeotropes Mixture here :

https://brainly.com/question/14781558?referrer=searchResults

#SPJ4

An object that sinks in water is more dense than the one which floats on it. The slope on a graph can determine the density of these objects.

For an identical size object, a dense object weighs more than a less dense one. A substance that is less dense than water will float on it; a substance that is denser will sink. Density equals mass per unit volume, or D = M / V, is the density equation.

The density of a substance can be determined by dividing its mass by its volume. Mass is on the y-axis and volume is on the x-axis in a graph of mass against volume. By calculating the slope, which is the change in y divided by the change in x, you may use this sort of graph to compute density.

To know more about density, refer to the following link:

https://brainly.com/question/952755

#SPJ9

Answer:

The atmosphere is the layer of gases surrounding a planet or other celestial body.

Explanation:

Hope this helps:)

Answer:

Atoms are made up of a nucleus, protons and electrons

pH is defined as the negative log10 of the hydrogen ion activity, although general chemistry texts commonly express it in terms of the hydronium ion the pH is calculated as 3.23.

In chemistry, the pH scale is used to define the acidity or basicity of an aqueous solution. Historically, pH stood for "potential of hydrogen."

The pH values of acidic solutions are typically lower than those of basic or alkaline solutions.

It is provided that,

{H3O+} = 5.79 X 10^-4M

We know that pH is basically the negative log10 of the hydrogen ion.

this means,

Thus, pH = -log10[H3O+]

Then putting the value of [H3O+]

pH = -log10 (5.39 x 10^-4)

pH = 3.23

To know more about pH, visit:

https://brainly.com/question/491373

#SPJ4

Complete question

PH is defined as the negative log10 of the hydrogen ion activity, aH+, although general chemistry texts commonly express it in terms of the hydronium ion concentration. Thus, pH = −log10 [H3O+], where [H3O+] represents the concentration of H3O+ in units of moles per liter (M). Calculate the pH or [H3O+], as required, for the following solutions. {H3O+} = 5.79 X 10^-4M

The answer of this question is 123.87 g

Here we have to find the molar mass of unknown solvent

Given,

freezing point of cyclohexane sample =6.20°c

freezing point of resulting solution =4.11°c

Delta Temperature(Δt) = kf × molality for finding molality

Moles = grams / molar mass

Molality = moles / kg solvent

In cyclohexane, the mass of mixed solute = 0.4 × 609

Solute mixed in cyclohexane and mixed in cycloheptene= 0.4^2 × 1000 / 36 π

Del Temperature (Δt)= kf × molality

= 2.0920 × 0.4 × 1004 / 36 × 2.09

M = 9320 / 73.29

= 123.87

Molar mass of  an unknown solvent = 123.87 grams

so, the answer of this problem is 123.87 g

To know more about cyclohexane visit : brainly.com/question/5382898

#SPJ4

After losing credibility throughout the jackson case trial. To show that only the body is failing, Gettler underwent a number of cyanide tests.

He identified cyanide poisoning as the cause of death using chemical analyses.

He examined techniques for identifying human body decomposition by  wood alcohol.

He identified cyanide poisoning as the cause of death using chemical analyses.

When arsenic was utilized as a toxin, the Marsh test, a very sensitive method for finding arsenic, is particularly helpful in the field of forensic toxicology. James Marsh, a chemist, created it, and it was first printed in 1836.

To know more about cyanide test in forensic toxicology, visit: https://brainly.com/question/14866310

#SPJ4

56 ml of water is displaced on submerging a book having volume of 56 cm³.

If a body is considered which is completely submerged, the volume which it will displace will be equal to volume of the body.If it is partially submerged,volume of fluid displaced will be equal to the volume of the part which is submerged.This is in accordance with the Archimedes' principle.

The Archimedes' principle can be stated as the upward buoyant force which is exerted on a body irrespective whether the body is partially or fully submerged  is equal to the weight of fluid which is displaced by it.

Thus,56 cm³ of water will be displaced on submerging the book into water as the book will be completely submerged.

Learn more about Archimedes' principle ,here:

https://brainly.com/question/13106989

#SPJ1

He decided not to dry his glassware throughout the calibration lab.

Instead, he shook leftover water out of his Erlenmeyer flask by the

wrist action.

This is an example of a random error.

Random errors also referred to as human error, depending on how well the experimenter is able to conduct the experiment and interpret the data.

Since the results could be either too high or too low, these errors are random.

Random error frequently determines or limits the experiment's precision.

For instance, the random error would be the reaction time if we were timing the revolution of a turntable that was rotating steadily.

A delay in the beginning (an underestimation of the actual result) or a delay in ending would cause a variation in our reaction time (an overestimation of the actual result).

Random errors differ from systematic errors in both magnitude and direction.

However, the average of a set of measured positions can be calculated, and that average is probably more accurate than the majority of the measurements.

To learn more about Random errors, refer

to https://brainly.com/question/25148363

#SPJ4

This is an example of a random error.

The term "random error" describes errors that happen when the conditions under which an experiment is conducted change.

A chance discrepancy between an object's true and observed values is known as a random error.

Chance is the cause of the random error.

When the same weight is placed on an electronic scale multiple times, the readings can vary randomly from one reading to the next. This is an example of a random error.

These discrepancies between the readings and the actual weight are due to random errors in the scale's weight measurements.

To learn more about the random error, refer

https://brainly.com/question/15000903

#SPJ4

Element of first triads with similar properties are : calcium , strontium and barium are in increasing order of atomic mass.

A triad is a grouping of three elements organized according to increase in atomic mass.

Dobereiner stated his law of triad as  : " airthmatic mean of atomic masses of first and third element would be equal to atomic mass of second element".

The first triad of dobereiner was introduced as : calcium , strontium  and barium.

In this triad, the airthmatic mean of calcium and barium is exactly same as that of strontium.

therefore , according to this the properties of middle element lie in between first and third element.

To learn more about triads  here

https://brainly.com/question/17984569

#SPJ4

Answer:

Identified triads of elements with similar properties:

✔ Dobereiner

Organized elements according to increasing atomic mass:

✔ Mendeleev

Explanation:

Ed22