Chemistry High School

1) How many grams of lithium, Li, contain 4.567 x 10^23 atoms?
2)What is the average mass (in grams) of one calcium, Ca, atom?
b) What is the average mass (in grams) of one mole of Ca atoms?

1) How Many Grams Of Lithium, Li, Contain 4.567 X 10^23 Atoms? 2)What Is The Average Mass (in Grams)

Answers

Answer 1

5.31 g of lithium contains  4.567 x 10^23 atoms.

The average mass (in grams) of one calcium, Ca, atom is 6.64 * 10^-23 g.

The average mass (in grams) of one mole of Ca atoms is 40.0 g.

What is the mass in grams of 4.567 x 10^23 atoms of lithium?

The molar mass of lithium is 7.0 g

One mole of lithium atom contains 6.02 * 10^23 atoms.

6.02 * 10^23 atoms of lithium weighs 7.0 g

4.567 x 10^23 atoms of lithium will weigh 4.567 x 10^23 * 7.0 g/6.02 * 10^23 = 5.31 g

Therefore, 5.31 g of lithium contains  4.567 x 10^23 atoms.

What is the average mass (in grams) of one calcium, Ca, atom?

6.02 * 10^23 atoms of calcium weigh 40.0 g

1 atom will weigh 1 * 40.0 g/6.02 * 10^23 = 6.64 * 10^-23 g

Therefore, the average mass (in grams) of one calcium, Ca, atom is 6.64 * 10^-23 g.

What is the average mass (in grams) of one mole of Ca atoms?

The molar mass of calcium is 40.0 g

Therefore, the average mass (in grams) of one mole of Ca atoms is 40.0 g.

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Related Questions

1. State the law of Conservation of linear momentum.
2. Explain why momentum must be conserved in an isolated system.​

Answers

Answer:

Law of conservation of linear momentum :- when there is no any external force applied on a system of particles then , momentum of system of particles will be conserved or you can say that if external force is zero. Then momentum of system of particles in intially = momentum of system of particles in finally

Explanation:

According to Newton's second law of motion, because no external force occurs on the system, The change in momentum is equal to zero; hence, the linear momentum is conserved. The entire linear momentum of an isolated system, that is, a system that is not subjected to any external forces, is conserved.

1. The total amount of momentum of the collection of objects in the system is the same before the collision as after the collision.

2. It must be conserved in an isolated system because isolated systems do NOT exchange matter or energy with their surroundings.

A sample of a gas in a rigid container at 35.0oC and 1.85 atm has its temperature increased to 48oC. What will be the new pressure?

Answers

Answer:

Standard pressure is always 1.00atm. Example #1: How many moles of oxygen will occupy a volume of 2.50 L at STP? Standard temperature = 273K law.

Explanation:

Answer:

2.07 atm

Explanation:

Please hurry
Which parts of Earth contain at least one form of water? Select all that apply. O
A. Cryosphere
B. Biosphere
C. Geosphere
D. Atmosphere
E. Hydrosphere

Answers

All of them contains water in some way

The parts of Earth that contain at least one form of water are Cryosphere, Biosphere, Geosphere, atmosphere and Hydrosphere. i.e all the given options are applicable.

All the parts of the earth contains at least one form of water and the hydrosphere on earth contains all form of water.

The atmosphere is the gaseous envelope round the earth. Breathing involves gaseous exchange between lungs and the atmosphere.

The biosphere is the living component. It is the part dominated and domiciled by life. T

The geosphere is the rock sphere of the earth. The earth's interior is all about the geosphere.

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What is the empirical formula for a compound that contains 17.34% hydrogen and 82.66% carbon?

CH2

C5H

C2H5

CH3

Answers

Answer:

C2H5

Explanation:

you first find the number of moles of both substances then divide by the lowest number in this case carbon was 1 and hydrogen was 2,515... then you multiply by a whole number which was 2 then it was now C2H5

3. What is the total pressure of a mixture of nitrogen and hydrogen, in atm, if the
partial pressure of nitrogen is 509.7 mmHg and the partial pressure of hydrogen is
630.3 mmHg?

Answers

Answer:

As per Dalton's law of Partial pressure,

The total pressure of a mixture of gases is equal to sum of partial pressure of individual components of the mixture.

So, P=P_H+P_N+P_WP=P

H

​

+P

N

​

+P

W

​

\implies 864\ mm=220\ mm+410\ mm+P_W\implies⟹864 mm=220 mm+410 mm+P

W

​

⟹ P_W=864-630=234P

W

​

=864−630=234 mm of Hg.

Explanation:

Hope it helps<3

Kl (aq) + _Pb(NO3)2 (aq) → __ KNO3 (aq) + _Pbl2 (s)

Answers

To make it equal you put a 2 infront of them

What is the mass of cs present in 15. 0 g of cesium acetate, formula csch3coo?.

Answers

Answer:

the answer is ''4g''

Explanation:

The mass of Cs present in 15.0 g of caesium acetate is approximately 10.18 grams.

To calculate the mass of Cs (caesium) present in 15.0 g of caesium acetate ([tex]\rm CsCH_3COO[/tex]), you need to determine the molar mass of [tex]\rm CsCH_3COO[/tex] and then find the proportion of Cs in the formula.

Molar mass of [tex]\rm CsCH_3COO[/tex]:

Cs: 1 atom * atomic mass of Cs = 1 * 132.91 g/mol = 132.91 g/mol

C: 2 atoms * atomic mass of C = 2 * 12.01 g/mol = 24.02 g/mol

H: 6 atoms * atomic mass of H = 6 * 1.01 g/mol = 6.06 g/mol

O: 2 atoms * atomic mass of O = 2 * 16.00 g/mol = 32.00 g/mol

Total molar mass of [tex]\rm CsCH_3COO[/tex] = 132.91 + 24.02 + 6.06 + 32.00 = 194.99 g/mol

Now, find the proportion of Cs in the formula:

Mass of Cs in 1 mol of [tex]\rm CsCH_3COO[/tex] = 132.91 g/mol

Mass of Cs in 15.0 g of [tex]\rm CsCH_3COO[/tex] = (15.0 g * 132.91 g/mol) / 194.99 g/mol ≈ 10.18 g

Thus, the mass of Cs present in 15.0 g of caesium acetate is approximately 10.18 grams.

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Valence electrons are found on the ____ shell of an atom and ____ with other atoms. For most atoms, the magic number is __ electrons to make a compound stable. Elements in group 1 have ___ valences electron(s) and are most ____. Elements in group 18 have 8 valence electrons, making them “___” and not reactive.

Answers

Valence electrons are found on the outer shell of an atom and bond. For most atoms, the magic number is 8 electrons to make a compound stable. Elements in group 1 have one valence electron and are most common. Elements in group 18 have 8 valence electrons, making them _____ and not reactive

(Help Me Please!)

A student collected the data shown above. Row A may represent error
B
C
D
E

Answers

A


It’s the biggest diff of temp without volume

1. Explain the data. Is there any evidence that a reaction has occurred?

2. Does the conductivity increase or decrease?

3. What is the indicator of the number of ions in solution?

4. How does this evidence indicate that the reaction has occurred between ions?

5. The Ba(OH)2 dissociates as Ba+² +2 OH. H2SO4 dissociates as 2 H+ +SO4-2. Write a balanced equation for this reaction.

6. When the conductivity is at a minimum, what must be true about the amount of Ba(OH)2?

7. Why does it not conduct at a low point?

8. Why does it conduct more before and after this minimum point?

If anyone has even one answer to any of these, that'd be really helpful!! Thank you! ^^​

Answers

The appearance of ions in solution makes a solution to conduct electricity.

What is conductivity?

Conductivity refers to the flow of current through a solution.

1) There is an evidence that reaction has occurred because of the formation of a precipitate

2) The conductivity decreases as more H2SO4 was added.

3) The indicator of the number of ions in the solution is the current recorded.

4) This evidence indicates that a reaction has occurred because the formation of a precipitate decreases the current.

5)  Ba(OH)2(s) ---->  Ba^2+(aq) + 3OH^-(aq)

H2SO4(aq) ---> 2H^+(aq) + SO4^2-(aq)

6) When the conductivity is at the minimum, It means that the   Ba(OH)2 is largely undissociated.

7) It does not conduct at a low point because there are no ions in solution.

8) It conducts more before and after this minimum point because of more ions in solution.

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A dead fish has washed up on the beach and is starting to decay. Which compound produces the unpleasant odor from the decaying fish?
A. pentane-1,5-diamine
B. hexane-1,5-diamine
C. hexane-1,6-dithiol
D. 2-pentanone

Answers

Answer:

A. Pentane- 1,5-diamine

Explanation:

I just did this in chemistry today

Answer:

The other person is correct.

Explanation:

You should give him brainiest.

a kettle takes 3 minutes to boil. Calculate what part of an hour it is.​

Answers

Answer:

1/20

Explanation:

an hour is 60 minutes and its 3 minutes of an hour therefore its 3/60 hour  or 1/20 of an hour

Answer:

soln,

=3×60

=180 answer

Describe how the meniscus is used to read volume measurements on a graduated cylinder

Answers

Answer:Tthe liquid in a graduated cylinder curves up at the edge where the liquid meets the wall of the cylinder. This curve in the liquid is called the meniscus and is used to determiine the volume of liquid in a graduated cylinder by observing the measurement tick closest to the bottom of the meniscus.

Explanation:

Hope it helps :D

The liquid in a graduated cylinder curves up at the edge where the liquid meets the wall of the cylinder. This curve in the liquid is called the meniscus and is used to determine the volume of liquid in a graduated cylinder by observing the measurement tick closest to the bottom of the meniscus.

Balance the Chemical reaction
2CH4—C2H6+3H2O


​

Answers

Answer:

2CH4 - - - > C2H6+3H2O

2C2

8H12

0O3

6CH4 + 3O - - - > 3C2H6+3H2O

6C6

24H24

3O3

I added oxygen to the reactant side because I presumed this must be a combustion of methane; since, H2O is made in the product side.

Hope this helps!

A)ants

B)sun

C)soil

D)air

Please help

Answers

Answer:

Abiotic factor would be soil.

Biotic factor would be ants.

Explanation:

HELP PLEASE FAST 100 POINTS

Answers

In any chemical reaction, the mass of the products must equal the mass of the reactants. The mass of product B is the same as the combined mass of Reactant A and H₂O.

Answer:

sh5barch shougi

Explanation:

14. A 500.0 ml flask contained O2 gas at 25.0°C at a pressure of 4.5 atm. What is the number
of moles in the flask?

Answers

Explanation:

3.Apply the ideal gas law: PV = nRT solving for n. Here you can use the pressure given in atm, but you must choose the 0.0821 atm L/mole K gas constant. Or you can change 4.5 atm to 3420 mm Hg and use the 62.4 mmHg L/mole K gas constant. You must change 500 ml to 0.5 L because both gas constants have units in L, and so the volume must be in liters so it can cancel out. And of course, you must change the temperature to Kelvin.

a. n = (4.5atm)(0.5L)

moliK)(298K) = 0.092 mole (0.0821 atmiL

b. 0.092mol 32g

⎛⎝⎜ ⎞⎠⎟ = 2.9 g

1mol

c. Remember that D = mass

vol so D = 2.9g

0.5L = 5.9 g/L

Requires an investment of energy

Anabolic
catabolic

Answers

Anabolism builds molecules required for the body's functionality. The process of catabolism releases energy. Anabolic processes require energy.

How many compounds are found in 2.3 moles of Ca(NO3)2?

Answers

Answer:

For every 1 Ca(NO3)2 there are six (2 * NO3 or 2 * 3 O) oxygens. If you have 3 mole of Ca(NO3)2 then you have 18 mole of oxygen atoms (3*6).

Explanation:

solve this questions please​

Answers

Answer:

I think B is the right answer.

hope this answer will help you

When an atom of chlorine forms an ionic bond with an atom of sodium, the atom of sodium...
A) Loses an electron
B) Loses a proton
C) Becomes an ion with a larger radius than the atom of sodium
D) Gains an electron

Answers

When an atom of chlorine forms an ionic bond with an atom of sodium, the

atom of sodium loses an electron.

What is an Ionic bond?

This is also known as electrovalent bond and it is the bond which occurs

as a result of elements gaining or losing electrons in a reaction.

An atom of chlorine forming an ionic bond with an atom of sodium,means

the atom of sodium will have to lose an electron in other to achieve a

stable octet configuration.

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Express solution concentration in terms of molality.

Answers

Explanation:

Molality of a solution is the number of moles of solute dissolved in 1 Kg of the solvent. Thus, if one gram molecule of a solute is present in 1 kg of the solvent.

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A gas at a pressure of 608 mmHg is held in a container with a volume of 545 mL. What is
the volume at standard pressure?

Answers

Answer:

441.81 mL

Explanation:

P1 x V1 = P2 x V2

V2 = P1 x V1 / P2

V2 = 608 x 545 / 750

V2 = 331360 / 750

V2 = 441.81 mL

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How did the lab activities help you answer the lesson question how do the processes of conduction, convection, and radiation help distribute energy on earth? what did you learn from conducting this lab?.

Answers

Answer:Conduction transfers heat between two materials that are touching, such as foil and chocolate pieces, or particles, such as the atoms in foil.Convection allows heat to be transferred in liquids, like water.Radiation transfers heat from a light bulb to paper.Conduction,

convection, and radiation move energy from the Sun to Earth and throughout Earth.

Explanation:

What are conduction, convection, and radiation?

Conduction: This is a flow of heat by direct contact. Heat travels from a warmer object toward a colder object.  

Convection: This is a transfer of heat by mixing a fluid.

Radiation is the transfer of heat in wave form.

Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas.

Radiation is the transfer of thermal energy through thermal emission.

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4. Which location (a, b, or c) would have the highest temperature?
5. Which location(a, b, or c) would have the lowest temperature?
6. Give reasoning to explain how and why the latitude of a place on Earth affects its average temperature.

answer fast worth 100 POINTS AND WILL MARK BRAINLEST

Answers

4.c
5.a
6. The higher level you get has the lowest temperature and if you are on ground level you will have a warm temperature.

#4

c is right above the earth's crest so it absorbs most earth .so highest temperature

#5

a is at top hence least heat absorbs so least temperature

#6

Higher the attitude lower the temperatureLower the attitude higher the temperature

Why does a beam of light bend when it passes into a new medium?

Answers

Answer + Explaination: A beam of light bends when it passes into a new medium because light travels slower in denser medium.

At which point is the slump block located?

Answers

Explanation:

At 4th point the slump block is located

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It is point 2, for anyone who sees this is the future

Please answer the image and also explain the image using the words condensation evaporation condensed liquid water and rain

Answers

Answer:

Evaporation: The physical process or stage where the water changes to vapor in the sky.

Condensation: The physical process or stage where the vaporised water (vapor) changes to water (rain)

Condensed liquid water: It is called a condensate. From the image, the condensate is rain

A 20. 0-liter flask contains a mixture of argon at 0. 72 atmosphere and oxygen at 1. 65 atmospheres. What is the total pressure in the flask? A. 0. 93 atm B. 2. 37 atm C. 8. 44 atm D. 18. 6 atm.

Answers

The total pressure of the system is equivalent to the sum of all the pressure of the individual gases. The total pressure of the flask is 2.37 atm.

What is total pressure?

According to Dalton's law, the total pressure of the system will be equivalent to the total of the pressures exerted by the individual gases present in the system.

The total pressure of gases is given as,

[tex]\rm P = P_{1} +P_{2}+ P_{3}.....P_{n}[/tex]

Given,

The pressure of argon gas = 0.72 atmThe pressure of oxygen = 1.65 atmTotal pressure = P

Substituting values in the above equation:

[tex]\begin{aligned}\rm P &= 0.72 + 1.65\\\\&=2.37\;\rm atm\end{aligned}[/tex]

Therefore, 2.37 atm is the total pressure of the flask.

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SOMEONE HELP ME PLEASE

Convert the answer above to Kelvin

Answers

Answer:

313.15

Explanation:

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