if 193 ml of chlorine gas was collected at 21 celsius, what volume would it have if the temperature dropped to 0 celsius

Answers

Answer 1

Answer:

New volume of chlorine gas (V2) = 179 ml (Approx)

Explanation:

Given:

Volume of chlorine gas (V1) = 193 ml

Temperature of chlorine gas (T1) = 21°C = 21 + 273 = 294 k

New temperature of chlorine gas (T2) = 0°C = 0 + 273 = 273 k

Find:

New volume of chlorine gas (V2) = ?

Computation:

Using charle's law

V1 / T1 = V2 / T2

193 / 294 = V2 / 273

V2 = 179.21

New volume of chlorine gas (V2) = 179 ml (Approx)


Related Questions

calculate the pH of 500cm3 of 0.2mol/dm3 Ca(OH2), assume complete ionisation​

Answers

Answer:

The pH of 500 cm³, 0.2 mol/dm³, Ca(OH₂) is ≈ 13.6

Explanation:

The given parameters are;

Concentration of the calcium hydroxide, Ca(OH₂) = 0.2 mol/dm³

Volume of the calcium hydroxide, Ca(OH₂) = 500 cm³

Given that the calcium hydroxide, Ca(OH₂),  undergoes complete ionization in water, complete dissociation, we have;

Ca(OH₂)  ⇄  Ca²⁺ + 2 OH⁻

Therefore, we have;

2 moles of [OH⁻] for each mole of Ca(OH₂) which gives the concentration of  [OH⁻] as

[OH⁻] = 2 × 0.2 ≈ 0.4 mol/dm³

The pH is given by the formula

pH = 14 + ㏒₁₀ [OH⁻]

pH = 14 + ㏒₁₀ (0.4) = 14 - 0.3979 = 13.6021 ≈ 13.6

The pH of the 500 cm³ 0.2 mol/dm³ Ca(OH₂) ≈ 13.6.

Di- Ethyl zinc is a chemical used in the library to protect books from worms, its composition is 53% Zinc, 38.9% Carbon, and 8.1% Hydrogen (At mass of Zn=65.4, C=12, H=1). Find the empirical formula of a compound

Answers

Answer:

ZnC4H10

Explanation:

The empirical formula of a compound refers to the formula that gives the simplest whole number ratio of each atoms of the elements in the compound.

The empirical formula is calculated thus:

The given percentages in the question represent the mass in grams of each element in the compound.

Zinc= 53%, C= 38.9%, H= 8.1% which represents 53g, 38.9g and 8.1g of each element respectively.

Molar Mass of Zn= 65.4 g/mol

Molar Mass of C= 12 g/mol

Molar Mass of H= 1 g/mol

Step 1: Divide the mass of each element by the molar mass given to convert to moles:

Zn= 53/65.4 = 0.81moles

C= 38.9/12 = 3.24moles

H= 8.1/1 = 8.1moles

Step 2: Divide each mole value by the smallest number of moles calculated, which is 0.81moles:

Zn= 0.81/0.81 = 1

C= 3.24/0.81 = 4

H= 8.1/0.81= 10

This is the mole ratio represented in the subscript of each element in the empirical formula:

That is, Zn (1) C (4) H (10)

Empirical formula= ZnC4H10

Calculate the number of molecules present in 2.50 mol H2S?



A. 1.51 x 10^24 molecules

B. 2.50 x 10^23 molecules


C. 1.5 x 10^23 molecules

Answers

2.50 x 6.02 x 10^23 = 1.51 x 10^24 molecules (A)

One mole of H₂S gas contains 6.022 × 10²³ H₂S molecules. Hence, 2.50 mol of H₂S contains 1.50 × 10²⁴ molecules. Thus, option A is correct.

What is Avogadro number?

Any substance containing 6.022 × 10²³ number of atoms is called one mole of that substance. This number is called Avogadro number. Thus, one mole every elements contains Avogadro number of atoms.

Similarly a compound is made of molecules. One mole of a compound contains 6.022 × 10²³ number of molecules. The mass of a compound with Avogadro number of molecules is called its molar mass.

As any other compound, one mole of H₂S contains 6.022 × 10²³ molecules. Therefore, the number of molecules in 2.50 moles of H₂S is :

2.50 moles × 6.022 × 10²³ molecules/mol =  1.50 × 10²⁴molecules

Hence, the number of molecules present in 2.50 moles of H₂S is  1.50 × 10²⁴.

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If a gas displays a solubility of 0.00290M at a partial pressure of 125 kPa, what is the proportionality constant for this gas in this solvent and at this temperature?

Answers

Answer:

The proportionality constant ( Henry’s constant) = 2.32 * 10^-5 M/kPa

Explanation:

Here in this question, we are concerned with calculating the proportionality constant for this gas.

Mathematically, we can get this from Henry law

From Henry law;

Concentration = Henry constant * partial pressure

Thus Henry constant = concentration/partial pressure

Henry constant = 0.00290 M/125 kPa = 2.32 * 10^-5 M/kPa

What is indicated by 'A' in the figure below? A. -VE B. +Ea C. -Ea D. +VE

Answers

Answer:

+VE

Explanation:

If we look at the reaction profile pictured in the question, we can easily identify A as the enthalpy of the reaction. The enthalpy of reaction (ΔHrxn) is usually defined as the difference between the total enthalpy (heat content) of the products of a reaction and the total enthalpy (heat content) of the reactants in that reaction.

Looking at the figure, we can see that the enthalpy of products is greater than the enthalpy of reactants, hence ∆Hrxn is positive as stated in the answer above.

Why is graphite slippery when pressed? Select one: a. covalent bonds break b. hexagonal layers slide c. molecules of graphite slide

Answers

Answer:

hexagonal layers slide

Explanation:

The layers in graphite can slide over each other because the forces between them are weak. The delocalised electrons are free to move through the structure, so graphite can conduct electricity.This makes graphite slippery, so it is useful as a lubricant .

i think it's right

hope it helps :)

percentage of carbon in urea

Answers

The percentage of carbon in urea is [CO(NH 2) 2] is 20%

what is the question tag for Lynne speaks french and German

Answers

Answer:here is it...

Explanation:

The question tag for the statement "Lynne speaks French and German" would be "doesn't she?"

The question tag is a short question added to the end of a statement to turn it into a question and seek confirmation or agreement. It is usually formed by using an auxiliary verb opposite in polarity to the main verb in the statement.

In the given statement, "Lynne speaks French and German," the main verb is "speaks." Since the main verb is in the affirmative form, the question tag should use the negative form.

Therefore, we use the auxiliary verb "doesn't" (the negative form of "does") and add the pronoun "she" to match the subject of the statement.

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What does the VSEPR theory describe

Answers

Answer:

The shape of a molecule based on the number of electron pairs on the valence shell of its central atom

Explanation:

The improvement of the Sidgwick-Powell theory came to be known as the Valence Shell Electron Pair Repulsion theory (VSEPR). This theory approaches the determination of molecular shape from the perspective of the number of electron pairs on the valence shell of the central atom in the molecule.

Electron pairs on the valence shells of atoms leads to repulsion. Repulsion between two lone pairs is greater than repulsion between a lone pair and a bond pair which is also greater than repulsion between two bond pairs.

Lone pairs cause more repulsion, hence they distort molecules from the ideal shape predicted based on their electron domain geometry.

A baseball has a mass of 135 grams and a softball has a mass of 270 grams. In which of the following situations would they have the same momentum? The baseball and softball are thrown at the same speed in the same direction.

Answers

Answer:

The baseball is thrown twice as fast as the softball in the same direction.

Explanation:

using methyl ,phenolphthalein and litmus name an acid

Answers

Answer:

These are two types of indicators which show a solution is either an acid a natural or an alkali solution

Explanation:

Hope this helps :)

what is mean by stakeholder​

Answers

Answer:

a stakeholder is a party that has an interest in a company and can either effect or be affected by the business. the primary stakeholder in a typical corporation are its investors , employees, customers and supplies.

please someone explain this I dont get it at all. how do we know that the 4th electron came from 2p because it's at 4th ionisation? why is it talking about 3s?? how do overall know that aluminium is in group 3 from the table??? thanks​

Answers

When you look at a table of ionization, you will see that certain groups, or columns, on the periodic table will either lose or gain a certain number of electrons. We can also see that aluminum is in the third column, hence it is in group 3

Which substance has the highest melting point? Select one: a. sugar b. Oxygen c. Diamond

Answers

Answer:

Diamonds

Explanation:

The melting point of sugar is 186C

The melting point of oxygen is -218C

The melting point of diamonds are 4078C

Therefore diamonds have the highest melting point.

You can also think of their structures, as diamonds have a covalent network structure, meaning they are really strong and have a high melting point

Oxygen has a covalent molecular structure

Sugar has a much weaker covalent network structure

1. If I have 3 identical books that all have a length of 25cm, a
width of 15cm, and are 11cm tall, what would be the volume of
all 3 books?

Answers

Answer:

12,375 cm³

Explanation:

v=l×w×h

Since there are 3 books the equation would then be

v=3(l×w×h)

v=3(25×15×11)

v=3(4,125)

v=12,375 cm³

Complete this sentence. If mass remains the same while the volume of a substance ________, the density of the substance will_______________.

Answers

Answer:

If mass remains the same while the volume of a substance changes, the density of the substance will also change.

Answer:

BELOW

Explanation:

If mass remains the same while the volume of a substance decreases the density of the substance will increase.

The identity of an element is determined by

A. the number of neutrons
B. the weight of the nucleus
C. the number of protons
D. the number of electrons



The answer is Number of Protons !

Answers

Answer: D. the number of protons

Explanation: The number of protons shows you what the Atomic number of an element is on the Periodic table of elements.

The identity of an element is primarily determined by the number of protons it possesses. The Option C.

What determines the identity of an element?

Each element on the periodic table has a unique number of protons in its nucleus which is referred to as its atomic number. This fundamental property of an element distinguishes it from other elements and determines its place on the periodic table.

While number of neutrons and electrons can vary within an element, it is the number of protons that defines its identity. Thus, the correct answer is C: the number of protons.

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Please help me... how do I draw this...

Draw diagrams to show the bonding in each of the following compounds:

a) calcium fluoride (CaF2)

Answers

Answer:

Hope it helps!!!

............

In the Lewis structure, the Ca atom donates its two valence electrons to two F atoms.

The bonding in calcium fluoride (CaF₂) involves the transfer of electrons from calcium (Ca) to fluorine (F), resulting in the formation of ionic bonds.

Each F atom gains one electron to achieve a stable electron configuration of eight electrons in its outermost energy level. The electrostatic attraction between the positively charged Ca ion (Ca²⁺) and the negatively charged F ions (F⁻) holds the compound together.

It's important to note that the diagram represents a simplified 2-dimensional representation of the compound's structure. In reality, the compound adopts a three-dimensional crystal lattice structure, with each Ca ion surrounded by eight F ions and each F ion surrounded by four Ca ions.

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The density of a 39 gram object with a volume of 5 cm is

Answers

Answer:

[tex]\huge\boxed{\sf D = 7.8 \ g/cm^3}[/tex]

Explanation:

Density = Mass / Volume

Where Mass = 39 g and Volume = 5 cm³

So,

[tex]\sf Density = \frac{39}{5} \\Density = 7.8 g/cm^3[/tex]

In the image above the ruler is measuring in centimeters. The blue cylinder falls somewhere between 2.7cm and 2.8cm according to the ruler. Since we can estimate the last digit I would say that the length of the cylinder is 2.76cm. Since I am estimating any number 2.72cm or 2.78cm could also be correct.

Why would 2.755 not be a correct measurement according to estimating the last digit?

Answers

Answer:

The accuracy of the measuring ruler is given as tenth of a centimetre and given that the image above the ruler is measuring in between a tenth of a centimetre, it is therefore measuring at a higher accuracy than the ruler

The least count of the vernier scale =  (Main scale's smallest reading)/(Number of vernier scale divisions)

Where;

Main scale's smallest reading = 0.1 cm

Number of vernier scale divisions = 10

We have;

The least count of the vernier scale =0.1/10 = 0.01

The image above the ruler, (the vernier scale measurement) should therefore measure at hundredth of a centimetre and the value of the measurement given to two places of decimal, 2.XX, as such 2.755 which is of a level of accuracy of a thousandth for the vernier scale would not be correct.

Explanation:

All the simple machines make work easier to do by changing the _____ or _____ of a force. A. size; type B. work; type C. size; direction D. type; direction

Answers

Answer:

C. size; direction

Explanation:

By definition, a machine is referred to any device that makes work easier. It takes force to do work, hence, work refers to the application of force over a particular distance. A machine aims at making the work easy by changing how it is done. Simple machines, which include: levers, pulleys, inclined planes etc. all carry out the same thing, which is to make work easier, by changing the size/magnitude and direction of the applied force.

A simple machine tends to change the size of the inputted force by increasing it over a shorter distance. The machine increases the force applied better than it can be done manually e.g. a plier and nutcracker increases/changes the applied force better than it can be done with bare hands.

Also, a simple machine can achieve making work easier by changing the direction at which the force is applied. The machine applies the force on the object in an opposite direction or contrary to the way it was manually applied.

BRAINLIEST!!! ❣


How do scientists use ice to study ancient climates?


A. through glacial deposits and ice cores

B. through glacial deposits and ice ages

C. through ice cores and pollen grains

D. through pollen grains and ice ages



Which greenhouse gas is produced by commercial refrigeration and air conditioning systems?


A. carbon dioxide

B. fluorinated gas

C. nitrous oxide

D. methane

Answers

Q1. A.

Q2. Nitrous oxide

Hope this helped ♥︎

Explanation:

the first question's answer is a

the second question's answer is c

Is wax a good conductor of electricity?

Answers

No, it isn’t but it is a good heat conductor, metal is a good electricity conductor though

Ara Ara... well... hope this helps

A sample of kerosene has a mass of 36.4g. It’s volume is 45.6mL. What is the density of kerosene?

Answers

Answer:

Density = 0.8 g/cm³

Explanation:

The density of an object can be found using the formula

[tex]Density(\rho) = \frac{mass}{volume} [/tex]

From the question

mass of kerosene = 36.4 g

volume of kerosene = 45.6 mL

To find the density substitute the values into the above formula and solve

We have

[tex]Density = \frac{36.4}{45.6} [/tex]

= 0.7982

We have the final answer as

Density = 0.8 g/cm³

Hope this helps you

Which of the following statements about a chemical reaction is false? Group of answer choices The phases in a chemical reaction tell us the state of the reactants and the products. An individual coefficient, with no reactant or product, in a balanced equation is meaningless. The subscripts in a balanced equation tell us the number of atoms in a molecule.

Answers

Answer:

Option B

Explanation:

Let us go through each of the options individually.

option A.

he phases in a chemical reaction tell us the state of the reactants and the products.

This is true because phases representations such as s, l , g and q tells us the state of the reactants if they are in the solid or liquid or gaseous or aqueous state of matter respectively. So this is not our answer.

option B

An individual coefficient, with no reactant or product, in a balanced equation is meaningless.

This option is correct, because in every reaction, there must be the reactant and product present.

option C

The subscripts in a balanced equation tell us the number of atoms in a molecule.

This is correct. Consider the equation below;

2H₂ + O₂ --> 2H₂O

In the reactant phase, the subscripts tells us that we have just two atoms of oxygen present.



How does antifreeze rely on colligative properties to work?

A. It causes the vapor pressure to increase and the increased outward pressure of the gasoline vapors prevents it from solidifying into ice.
B. It causes freezing point elevation which raises the temperature of the gasoline without letting it freeze.
C. It causes freezing point depression which requires the gasoline to reach a much lower temperature before freezing.
D. It causing boiling point elevation, which raises the temperature of the gasoline without letting it boil so that it can resist the cold.

WILL GIVE BRAINLIEST FOR CORRECT!!!

Answers

It causes freezing point depression which requires the gasoline to reach a much lower temperature before freezing. Hence, option C is correct.

What is the freezing point?

Whenever a solute is added to a solution/solvent, it leads to depression in the freezing point of that solution/solvent. Depression in the freezing point of a solution on the addition of a solute is a colligative property.

A colligative property is a physical property which depends upon the number of solutes added not on the nature of solutes which means it does not matter whether we are adding 1000 particles of sugar or salt in water, the depression in the freezing point will occur by the same °C. Also, the more a solute is added the more will be the depression at the freezing point.

The formula for depression at the freezing point is mentioned as under:

             Δ T = K x m

where Δ T = freezing point depression;

                 K = cryoscopic constant;

                 m = molality of the solution.

For example, The freezing point of water is 0 °C but as soon as we add a 92 gm solute like NaCl (common salt) in 1000 gm of water, its freezing point will be lower to −3.72 °C.

Hence, option C is correct.

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Which of the following is an example of a consumer? Tree Sun Rabbit Mushroom

Answers

Answer:

rabbit

Explanation:

Answer:

rabbit

Explanation:

the rabbit is the consumer because the sun "produces" the tree and mushroom, the rabbit comes along and eats the mushroom which was produced by the sun.

Why are ionic crystals soluble in water?

A. The covalent bonds in the ionic crystal can easily reshape to bond with the water molecules, allowing it to dissolve.

B. The water slides the layers of the ionic crystal lattice so that positive charges line up with positive charges. They repel

each other and break the crystal apart.

C. Partial charges in water molecules attract the charges in the atoms of the ionic crystal, pulling the atoms off the crystal.

D. They are not. The positive and negative charges in the ionic lattice are stronger than the partial charges in the water.

Answers

Answer:

C. Partial charges in water molecules attract the charges in the atoms of the ionic crystal, pulling the atoms off the crystal.

Explanation:

Water consists of partial positive and hydrogen ions and partial negative oxygen ions. The ionic crystals also dissociate into ions when in water.These partial charges and ability of ionic compounds to dissociate in water are the main reason why ionic crystals dissolve in water.

The partial charges in the water molecules form a strong attraction towards the charges in the atoms of ionic crystals. This then pulls the atoms from the crystals and ends up in the dissolution of the ionic crystals.

explain why ply(ethene) can become a pollutant? ​

Answers

Answer:

ipotseeeeeeeeeeeeeeee

If a chemist wants to make one liter of a 1.5 M solution of NaOH from a stock solution of 2.5 M NaOH, how many milliliters of the stock solution would the chemist need to use?


A.6.0 x 102 mL

B. 0.60 mL


C. 1.7 x 103 mL

Answers

Answer:

0.60 mL

Explanation:

1. Set up the equation using Vi = MfVf / Mi

Vi = (1.5M · 1L) / 2.5M

2. Solve

1.5 / 2.5 = 0.6

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The weather is splendid now, but yesterday it was so wet that the workmen didn't do anything all day. How much hay have you stacked? Just think, I felt greedy and had a whole field cut, and now I'm not at all pleased about it because I'm afraid my hay may rot. I ought to have waited a bit. But what's this? Why, you're in evening dress! Well, I never! Are you going to a ball, or what?though I must say you look better. Tell me, why are you got up like that? LOMOV: [Excited] You see, honoured Natalya Stepanovna . . . the fact is, I've made up my mind to ask you to hear me out. . . . Of course you'll be surprised and perhaps even angry, but a . . . [Aside] It's awfully cold! find the perimeter of a square of sides 10.5cm At what distance from the centre of the earth its acceleration due to gravity becomes one third only? [Mass and radius of earth = 6x10 24 kg & 6.4x10 6 m resp.] Use Lagrange multipliers to minimize the function subject to the following two constraints. Assume that x, y, and z are nonnegative. Question 18 options: a) 192 b) 384 c) 576 d) 128 e) 64 Yousif has never come late.(Begin with : Never) To prevent states from violating federal law after the 2013-2014 school year; in return, states were required to: Read the excerpt from The Canterbury Tales."Gentlemen" said he, "I take pains to preachIn churches with a lofty, resonant voice,Regular as a bell I ring it out,For everything I say I have by heart:My texts the same one as it always was . . ."Which statement best describes how the Pardoner is characterized in this passage? what number must be added to the sequence of 7,13 and 10 to get an average of 13 Read the following sentence, and then select the group of words that consists of only nouns. His work in the 1930s consisted primarily of laboratory experiments in learning, using pigeons as subjects. A. work, primarily, laboratory, subjects B. his, work, experiments, learning C. his, the, consisted, pigeons D. work, experiments, pigeons, subjects a project will produce cash inflows of 5400 a year for 3 years with a final cash inflow of 2400 in year 4. The projects initial cost is 13400. what is the net present value if the required rate of return is 14.2 percent? 1. If I have 3 identical books that all have a length of 25cm, awidth of 15cm, and are 11cm tall, what would be the volume ofall 3 books? Which of the following is classified as investment? I. existing homes II. business spending on new equipment III. purchase of corporate stock IV. taking out a loan to build an office building Help please on question 61!! You are an assistant director of the alumni association at a local university. You attend a presentation given by the universitys research director and one of the topics discussed is what undergraduates do after they matriculate. More specifically, you learn that in the year 2018, a random sample of 216 undergraduates was surveyed and 54 of them (25%) decided to continue school to pursue another degree, and that was up two percentage points from the prior year. The Dean of the College of Business asks the research director if that is a statistically significant increase. The research director says she isnt sure, but she will have her analyst follow up. You notice in the footnotes of the presentation the sample size in the year of 2017 was 200 undergraduates, and that 46 of them continued their education to pursue another degree. There is a short break in the meeting. Take this opportunity to answer the deans question using a confidence interval for the difference between the proportions of students who continued their education in 2018 and 2017. (Use 95% confidence level and note that the university has about 10,000 undergraduate students). X=3816371/(2763) solve for x which of these contributed to the union victory in the civil war Midpoint City operates its own municipal public drinking water system for which the Environmental Protection Agency has set maximum levels of pollutants. The city does not use any equipment to meet these standards. With regard to any contamination of the water, under the Safe Drinking Water Act, this is most likely Give two examples of a large databases that might be used to help members of the public