Determine the kinds of intermolecular forces that are present in each element or compound. Part A KrKr Check all that apply. Check all that apply. dispersion forces dipole-dipole forces hydrogen bonding

Answers

Answer 1

Answer:

The kinds of intermolecular forces that are present in each element Kr-Kr.

Explanation:

Since Kr is an inert gas and in atomic form only it is highly stable.

So, Kr gas does not form molecules.

Between the atoms of inert gas, there exist London dispersion forces.

Hence, the intermolecular forces that are present between Kr-Kr atoms is London dispersion forces.


Related Questions

Find the volume occupied by 128g of SO2.​

Answers

The volume occupied by the given amount of sulfur dioxide will be 84 L.

please show working my dear citizen

The correct geometry around oxygen in CH3OCH3 is
(a). linear. (b). bent. C). tetrahedral/(a). trigonal planar​

Answers

Explanation:

the force of the lone pairs from the bottom would cancel out the force of the lone pairs from the top. Thus, the molecule will be linear.

A water chemist measured and recorded the air temperature at 27°C when he should have measured the water temperature, which was only 21°C. As a result of this error, will the dissolved oxygen concentration be reported as being higher or lower than it should be? Explain.

Answers

Answer:

See explanation

Explanation:

The dissolution of oxygen in water is exothermic. Hence, at higher temperature, less oxygen is dissolved in water.

If the chemist commits an error and records 27°C instead of 21°C, the dissolved oxygen concentration will be found to be lower than it should be at 27°C because dissolution of gases in water is exothermic.

Most reactions, including enzyme-catalyzed reactions, proceed faster at higher temperatures. However, for a given enzyme, the rate drops off abruptly at a certain temperature. Account for this behavior.

Answers

Answer:

It has denatured

Explanation:

When the temperature get high the enzymes tend to change shape and denaturing occurs.

What is the mass of 7.2 moles of titanium to the nearest tenth?

Answers

Answer:

7.2 moles of titanium weigh 344.7 grams.

Explanation:

Molar mass of titanium = 47.88 g

[tex]1 \: mole \: of \: titanium = 47.88 \: grams \\ 7.2 \: moles \: of \: titanium = g[/tex]

solve for g

[tex]g = ( \frac{7.2 \times 47.88}{1} ) \\ g = 344.7 \: grams[/tex]

Answer:

[tex]\boxed {\boxed {\sf 344.7 \ g \ Ti}}[/tex]

Explanation:

We are asked to find the mass of 7.2 moles of titanium.

To convert from moles to grams, we use the molar mass. This value is the mass of 1 mole of a substance. They are equivalent to the atomic masses found on the Periodic Table, but the units are grams per moles instead of atomic mass units.

Look up titanium's molar mass on the Periodic Table.

Ti: 47.87 g/mol

Convert moles to grams using dimensional analysis. First, set up a ratio using the molar mass.

[tex]\frac {47.87 \ g \ Ti}{1 \ mol \ Ti}[/tex]

We are converting 7.2 moles to grams, so we multiply the ratio by this value.

[tex]7.2 \ mol \ Ti *\frac {47.87 \ g \ Ti}{1 \ mol \ Ti}[/tex]

The units of moles of titanium cancel.

[tex]7.2 *\frac {47.87 \ g \ Ti}{1 }[/tex]

The denominator of 1 can be ignored (a number over 1 is just the number).

[tex]7.2 *47.87 \ g \ Ti}[/tex]

[tex]344.664 \ g \ Ti[/tex]

We are asked to round to the nearest tenth. The 6 in the hundredth place tells us to round the 6 in the tenth place up to a 7.

[tex]344.7 \ g \ Ti[/tex]

There are approximately 344.7 grams of titanium in 7.2 moles of titanium.

What is the purpose of the periotic table?

Answers

Answer:

The periodic table was first designed by Mendeleev. It is designed to systematically categorise elements according to atomic number, electron configuration and recurring chemical properties. This allows identification of elements through their characteristics simply by analysing its position on the table.

Wet helium gas is placed into a balloon at 24.4 degrees Celsius and a pressure of 765.3 mm Hg. What volume (in L) does the dry gas occupy if the water vapor pressure is 24.3 torr and the mass of dried helium gas in the balloon is 0.498 g

Answers

Answer:

Hence the Volume of Gas = 3.04 L.

Explanation:  

pressure of dry gas = 765.3 - 24.3 = 741 mmhg  

Temperature of gas = 24.4+273.15 = 297.55 k  

No of mol of gas = 0.498/4 = 0.1245 mol  

R = gas constant = 0.0821 l.atm.k-1.mol-1  

From ideal-gas equation

PV = nRT  

(741/760) x v = 0.1245 x 0.0821 x 297.55  

V = Volume of Gas = 3.04 L

What is the volume of the fluid in the graduated cylinder measured to the correct degree of precision?

37.22 mL
38.05 mL
37.0 ml
37.8 ml

Answers

Answer:

37.0. gsgggsgsghddhhdd

Which of the following is an example of a scientific theory?
Matter can be neither created nor destroyed.
Force equals mass times acceleration.
Matter behaves the way it does because it is made of atoms.
There is probably life on Mars.


C. Matter behaves the way it does because it is made of atoms.

Answers

Answer:

Matter can neither be created nor destroyed

Explanation:

Mark me. as brainliest

At constant temperature and pressure, if 0.4 mole of a gas. A occupies 220 ml, and x mole of B gas occupies 120 ml. what is the number of moles of gas B?

Answers

Answer:

0.218mol

Explanation:

Using Avogadro's law equation;

Va/na = Vb/nb

Where;

Va = volume of gas A

Vb = volume of gas B

na = number of moles of gas A

nb = number of moles of gas B

According to the information in this question,

na = 0.4mol

nb = x mol

Va = 220ml

Vb = 120ml

Using Va/na = Vb/nb

220/0.4 = 120/x

Cross multiply

0.4 × 120 = 220 × x

48 = 220x

x = 48/220

x = 0.218mol

How do the particles in plasmas compare with
the particles in solids?
O Plasmas and solids are both made up of cation-anion pairs.
• Solids and plasmas are both made up of electrons and cations.
Solids are made up of cation-anion pairs, but plasmas are not.
O Plasmas are made up of cation-anion pairs, but solids are not.

Answers

Answer:

Solids are made up of cation-anion pairs, but plasmas are not

Explanation:

Solid is made from cautions and anions while the plasma is not and hence both are made from the cautions and anion plasma. Solids and plasma is made from electrons and solids are made from caution and anion pairs. Plasma is a good conductor of electricity as they have a lot of mobile charged particles.

A functional group introduces heteroatoms into a carbon chain to increase





polarity.




chain length.




molecular mass.




reactivity.

Answers

Answer:

reactivaty

Explanation:

here you go for the answer

Which of the following stays constant when diluting a solution?

Select the correct answer below:

A) volume
B) molarity
C) concentration
D) amount of solute

Answers

Answer:

when you're diluting a solution, you're adding in more solvent, so the solute will maintain the same (D)

NEED ANSWER FAST 50 POINTS
A mixture of copper sulfate and water is heated, leaving a residue of copper sulfate in the container. Which method was used to separate the mixture?

A. chromatography

B. evaporation

C. filtration

D. distillation

Answers

The method used to separate copper sulfate and water mixture was evaporation.

Explanation:

Chromatography is a separation technique used in labs. In this technique, there are two phases, the mobile phase, and the stationary phase. The phase in which the mixture is dissolved is termed as mobile phase and the phase which serves as a carrier through the system like, sheet, capillary, etc. is termed as mobile phase.Evaporation is a process in which the action of heat is employed to separate dissolved solids from liquid. Due to heat liquid gets evaporated leaving the solid behind.Filtration is a process in which insoluble particles are separated from the liquid by allowing them to pass through a porous substance such as filter paper. Distillation is a process used in the separation of the mixture of liquids with different boiling points.

So, from this, we can conclude that the method used to separate copper sulfate and water mixture was evaporation.

Learn more about separation techniques here

brainly.com/question/625109?referrer=searchResults

brainly.com/question/16774902?referrer=searchResults

Answer:

Just did this on my test the answer is evaportion.

Explanation:

Over a long period of time the process of deposition causes the formation of
O
A. acid rain
OB. glaciers
OC. sedimentary rock
OD. Karst topography

Answers

Answer:

C. sedimentary rock

Explanation:

Deposition is basically a process in which sediments are added to land.

The answer would be option 0C. Sedimentary rock
Hope this helped

11. How many oxygen atoms are there in one formula unit of Ca2+?

Answers

Answer:

NO3 has 3 atoms of oxygen in it per molecule (indicated by the subscript of 3) and (NO3)2 means you have 2 NO3 molecules, meaning you double the subscript to get 6 oxygen atoms.

Explanation:

do you think that religion and science are in conflict ,or that people can both have both without any problems

Answers

Religion and science are fundamentally incompatible. They disagree profoundly on how we obtain knowledge of the world. Science is based observation and reasoning from observation. Religion assumes that human beings can access a deeper level of information that is not available by either observation or reason.
I think that they can both work together without conflict.

Rewrite this measurement with a simpler unit, if possible.
4.5·m2m2m

Answers

Answer:

why are people s opinions and prejudices her greatest obstacles

pls help!!! How can you prove the pennies are made of different material aside from cutting them in half?

Answers

Answer:

Most of our coins are metal sandwiches. The outside layers are three-quarters copper and one-quarter nickel, and the "filling" is solid copper. Pennies are made of zinc coated with copper. Only nickels are one solid material—that same 75% copper/25% nickel alloy

Explanation:

An object with a mass of 3kg has a force of 9 newtons applied to it. What
is the resulting acceleration of the object?

Answers

Answer:

3 m/s^2

Explanation:

m = 3 kg

F = 9 N

Use Newton's Second Law: F = ma

9 = 3a

a = 3 m/s^2

According to an informal 1992 survey, the drinking water in about one-third of the homes in Chicago had lead levels of about 10 ppb. Dr. Koether lived in Chicago from 1996 to 1998. Assuming she drank 1.4 L of water a day, calculate the total amount of lead in mg (using one decimal place) that she was exposed to over the two years if she lived in a home that had such high levels of lead.

Answers

Answer:

10.2 mg

Explanation:

Step 1: Calculate the total amount of water she drank

1 year has 365 days and she lived in Chicago for 2 years = 2 × 365 days = 730 days.

If she drank 1.4 L of water per day, the total amount of water she drank is:

730 day × 1.4 L/day = 1022 L

Step 2: Calculate the amount of Pb in 1022 L of water

The concentration of Pb is 10 ppb (10 μg/L).

1022 L × 10 μg/L = 10220 μg

Step 3: Convert 10220 μg to milligrams

We will use the conversion factor 1 mg = 1000 μg.

10220 μg × 1 mg/1000 μg = 10.2 mg

Explain why it is not advisable to add water to acid when
mixing them​

Answers

Answer:

Consequence

you form an extremely concentrated solution of acid initially.and the solution may boil very violently, splashing concentrated acid.  I hope this helped! :)

Predict whether solutions of each of the following salts will be acidic, basic, or neutral. Explain your reasoning for each by writing a balanced net ionic equation to describe the chemistry of each non-neutral salt in water:

a. NaCN
b. KNO3
c. NH4Cl
d. NaHCO3
e. Na3PO4.

Answers

Answer:

NaCN- basic salt

KNO3 - neutral salt

NH4Cl - acid salt

NaHCO3 - acid salt

Na3PO4 - acid salt

Explanation:

Salt hydrolysis a process by which salts react with water giving an acid and a base.

When we dissolve NaCN in water, we have;

NaCN + - ⇄ Na^+ + CN^-

KNO3 ------> K^+ + NO3^-

NH4Cl ------> NH4^+ + Cl^-

NaHCO3 -----> Na^+ + HCO3^-

Na3PO4 ----> 3Na^+ + PO4^3-

Note that if a salt is formed from a weak acid and a strong base, the salt will be a basic salt e.g NaCN formed from weak HCN and strong NaOH.

If a salt is formed from a strong acid and weak base, the salt will be acidic, e.gNH4Cl formed from weak NH3 and strong HCl.

If a salt is formed from a strong acid and strong base, the salt will be neutral, e.g KNO3 formed from strong KOH and strong HNO3.

In water, a substance that ionizes completely in solution is called a

Answers

Answer:

please mark me brainliest

Explanation:

In water, a substance that ionizes completely in solution is called a weak electrolyte.

Answer: strong electrolyte.

Explanation: In water, a substance that ionizes completely in solution is called a. a. weak electrolyte.

When a chemical changes from the solid phase to the gas phase, this is an example of What chemical property?

Answers

Answer:

sublimation

Explanation:

solid => liquid   Melting

liquid => solid   freezing

liquid => gas     evaporation

gas => liquid     condensation

solid => gas      sublimation

gas => solid      deposition (e.g.; formation of frost), however some scholars will also refer to this process as sublimation.

a team of engineers has decided to design a new shoe for people suffering from a painful foot condition. What should the engineers do during the planning stage

Answers

team of engineers has decided to design a new shoe for people suffering from a painful foot condition. What should the engineers do during the planning stage

Congratulations! You are now the head biologist at the local "Cells and Bells" research lab! It has come to other cell biologists' attention recently that some cells are too small to contain all of the organelles inside of them. They decide that it's best to get rid of an organelle, but they're not sure which one. In the first process of this decision, they need to know "which organelle is the most important?"

Your job, as the head cell biologist, is to decide which organelle the cell cannot live without.

Write a research paper (intro, body, and conclusion) on which organelle is the most important and why.

Answers

The answer seems to be 27


Compared to an atom of C-12, an atom of C-14 has
A) fewer protons
C) more neutrons
B) fewer neutrons
D) more protons

Answers

Explanation:

Carbon-12 atoms have stable nuclei because of the 1:1 ratio of protons and neutrons.

Carbon-14 atoms have nuclei which are unstable. C-14 atoms will undergo alpha decay and produce atoms of N-14. Carbon-14 dating can be used to determine the age of artifacts which are not more than 50,000 years old.

The valves in the heart open and close to move blood in between heart chambers. O a) three directions O b) two directions O c) four directions d) one direction

Answers

Answer:

im not sure but i think its four directions

Hi,

The valves in the heart open and close to move blood in between heart chambers.

Answer:

d) one direction

What is Entropy?

A. The opposite of Enthalpy
B. The temperature at which a reaction is feasible.
C. A measure of disorder.
D. Free energy used for a reaction.

Answers

Answer:

C. A measure of disorder :)

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