-Particle Conversions
How many moles of Lithium are in 7.15 x 1024 atoms of Lithium?

Answers

Answer 1

Answer:

The answer is 11.88 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{7.15 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 11.87707641...[/tex]

We have the final answer as

11.88 moles

Hope this helps you


Related Questions

2.303 3-5.05x10-3
1 | - 1
T2298

Answers

Answer:

230,294.9 I think it's fine just try your past or ask teacher help

help
if you start with a substance as a solid what will happen to the molecules as you add thermal energy (heat)?

Answers

Answer: One change of state happens when you add energy to the substance. This change of state is called melting. By adding energy to the molecules in a solid the molecules begin to move quicker and can break away from the other molecules.

Explanation: I hoped that helped!

Where is most of the water on earth found? What percentage?

Answers

Answer:

The ocean holds about 97 percent of the Earth's water; the remaining three percent is found in glaciers and ice, below the ground, in rivers and lakes. Of the world's total water supply of about 332 million cubic miles of water, about 97 percent is found in the ocean.

wait..if you asking about the country it's Brazil✌️

Which process creates new cells from existing cells?
A. Cell division
B.Cell limitation
C.Cell addition
D.No answer text provided.

Answers

Answer:

the answer is cell division

Explanation:

cell division is the process by which a present cell divides into two or more daughter cells.

the process can also be called cell cycle

What is it called when scientists in the same or similar field of study judge the quality of a fellow scientist’s scientific claim?

Answers

when scientists judge the quality of another scientists claim, it is called peer review

I need to find the orbit notation
1. Ne - 1s 2s 2p 3s 3p 4s 3d 4p 5s​

Answers

Answer:

1s*2 2s*2 2p*6

Explanation:

atomic number of neon is 10 so the s-shell contains 2 electron and p-shell contains 6

7 types of motion you experience through the day.

Answers

Answer:

car is in the driveway

water is flowing in the river

a man is. walking in the road

a bird is flying in the sky

a tiger is running in the jungle

a tiger is running to eat a breakfast

If I place a balloon in my fridge that initially has a pressure of 1.02 atm and a
temperature of 11.2 °C, what will be the pressure (in atm) of the balloon when it is
fully cooled to 4.00°C by my refrigerator?

Answers

Answer:

P₂ = 0.99 atm

Explanation:

Given data:

Initial pressure = 1.02 atm

Initial temperature = 11.2°C

Final pressure = ?

Final temperature = 4.00°C

Solution:

Initial temperature = 11.2°C (11.2+273 = 284.2 K)

Final temperature = 4.00°C (4.00+273 = 277 K)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

1.02 atm / 284.2 K = P₂/277 K

P₂ = 1.02 atm × 277 K / 284.2 K

P₂ = 282.54 atm. K /293 K

P₂ = 0.99 atm

An astronaut leaves Earth's surface and begins orbiting Earth. How will his departure from Earth affect his mass and weight?

Answers

His mass will remain constant; his weight will decrease
His mass will remain constant; his weight will decreases

1. Under what conditions can potassium bromide conduct electricity?
A only when melted
B. when melted or dissolved in water
C. only when it is in crystal form
D. only when dissolved

Answers

Answer:

potassium bromide can only conduct electricity when in an aqueous solution due to the electrostatic force between the ionic bonds

The potassium bromide can conduct electricity when melted or dissolved in water. Therefore, option (B) is correct.

What are ionic compounds?

The crystalline solids which are formed by closely packed ions of opposite charge are called ionic compounds. In ionic compounds, the ions are connected with each other by ionic bonds in solis state.

The elements which can gain or lose electrons to attain their nearest noble gas configuration participate in the formation of ionic compounds. The solid ionic compound cannot able to conduct electricity.

In the melted state, the ions of K⁺ and Br⁻ can move from their fixed positions. Therefore, the KBr can conduct electricity when melted or dissolved in water.

The ionic compounds are able to conduct electricity in melted or dissolved in water. Because only in these states the ins can move freely while in the crystalline state the ions cannot move freely to conduct electricity.

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Choose the coefficient for blank 1 (in front of C)

___ C + ___ S8 --> ___ CS2



2


1


3


4

Answers

Answer:

;l ok

Explanation:

The coefficient would be 4.

4C + S8 → 4CS2 (balanced equation)

How many moles of cesium carbonate will be produced when 5.34 moles of cesium reacts with iron (III) carbonate? (You must write and balance the formula equation!)

Answers

Answer:

2.67 moles of cesium carbonate (Cs2CO3).

Explanation:

We'll begin by writing the equation for the reaction. This is illustrated below:

Cs + Fe2(CO3)3 —> Cs2CO3 + Fe

The above equation can be balance as follow:

There are 2 atoms of Fe on the left side and 1 atom on the right side. It can be balance by putting 2 in front of Fe as shown below:

Cs + Fe2(CO3)3 —> Cs2CO3 + 2Fe

There are 3 atoms of C on the left side and 1 atom on the right side. It can be balance by 3 in front of Cs2CO3 as shown below:

Cs + Fe2(CO3)3 —> 3Cs2CO3 + 2Fe

There are 6 atoms of Cs on the right side and 1 atom on the left. It can be balance by putting 6 in front of Cs as shown below:

6Cs + Fe2(CO3)3 —> 3Cs2CO3 + 2Fe

Thus, the equation is balanced.

From the balanced equation above,

6 moles of Cs reacted with 1 mole of Fe2(CO3)3 to produce 3 moles of Cs2CO3.

Finally, we shall determine the moles of cesium carbonate (Cs2CO3) produced by the reaction of 5.34 moles of cesium (Cs). This can be obtained as follow:

From the balanced equation above,

6 moles of Cs reacted to produce 3 moles of Cs2CO3.

Therefore,

5.34 moles of Cs will react to produce = (5.34 × 3)/6 = 2.67 moles of Cs2CO3.

Thus, 2.67 moles of cesium carbonate (Cs2CO3) were produced from the reaction.

A high school chemistry teacher asks four student groups to determine the number of protons, neutrons, and electrons (respectively) present in an ion of Titanium (Ti 2+). Which student group provides the best answer?

Answers

Answer:

Electrons - 20

protons - 22

neutrons - 26

Explanation:

Titanium has an atomic number of 22 indicating that the neutral atom has 22 protons.

Ti 2+ has lost two electrons and contains only 20 electrons, 22 protons.

The mass number of titanium is 48. Hence;

Mass number = atomic number + number of neutrons

Since the atomic number is 22 and the mass number is 48

number of neutrons = 48 - 22 = 26 neutrons

how can the molar mass of a gas can be determined

Answers

By applying the ideal gas law, PV=nRT

a sample of carbon dioxide gas occupies a volume of 20 L at standard temperature and pressure (STP). what will be the volume of a sample of argon gas that has the same number of moles and but tripled the absolute temperature?​

Answers

Volume of Argon = 59.972 L

Further explanation

In general, the gas equation can be written  

[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08206 L.atm / mol K  

T = temperature, Kelvin  

At STP(0 C, 1 atm), 1 mol gas= 22.4 L

so for 20 L

[tex]\tt \dfrac{20}{22.4}=0.893[/tex]

For Argon

P = 1 atm

T = 273 K x 3 =819 K (tripled)

n = 0.893 (the same number of moles)

R = 0.082 L/atm.mol K

[tex]\tt V=\dfrac{nRT}{P}=\dfrac{0.893\times 0.082\times 819}{1}=59.972~L[/tex]

PLEASE HELP ASAP



A beach ball has a mass of 5g a volume of 20cm3. What is the object's density?

Answers

Answer:0,25 g/cm3 creo

Explanation:densidad es masa entre volumen

Answer:

0.25 g/cm³

Step-by-step explanation:

As we know

The density is given by

Density = Mass / Volume

Putting the values

Density = 5g / 20 cm³

Density = 0.25 g/cm³

Sorry if wrong I'm not great at math!

eter explores the periodic table and how atoms can combine to form compounds. He uses beads with different sizes and colors as models. Each different type of bead represents atoms from a different element.

How can Peter best use the beads to show how compounds form in nature?

Answers

Answer is B-  He can arrange the beads into various formations using different colors and sizes multiple times

Explanation: I hope the helped!

Peter can arrange the beads into various formations using different colors and sizes multiple times.

What is Periodic Table ?

The periodic table, also known as the periodic table of the elements, is a tabular display of the chemical elements. It is widely used in chemistry, physics, and other sciences, and is generally seen as an icon of chemistry.

In order to show how compounds form in nature, the beads will be assigned to the different elements on the periodic table according to the following arrangements;

The beads representing the elements of each group in the periodic table will all have the same colorThe sizes of the beads within each group will increase from the top to the bottom of the group

With the above arrangements, it will be possible to show the affinity and proportion of the elements in the compound formed in nature.

Therefore, Peter can arrange the beads into various formations using different colors and sizes multiple times.

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Question 1
The best alternate headline for this article would be
o Scientists Find 500 Planets Outside Earth's Solar System
O Newly Discovered Exoplanet Has Earth-like Temperatures-Plus Water!
O Scientists Find "Goldilocks Zone" in Space-Neither too hot nor too cold!
Newly Discovered "Goldilocks" Planet Might Be Right for Life

Answers

Answer:

by Judith Curry On what we can learn from Goldilocks and The Three Bears ... In planetary science, the 'Goldilocks zone' is terminology for the the band ... We all know the fairy tale story of “Goldilocks and the three bears”, where GL ... as the discovery that the Earth was not the center of the solar system.

Explanation:

Two sphericle objects have masses of 8000 KG and 1500 KG their centers are separated by a distance of 1.5 M find the gravitational attraction between them

Answers

if I am correct I think its I'm am not 100 percent sure but I think this should be the answer

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N

Using the formula of gravitational attraction

F = G*M1M2/d²

where G = 6.67 * 10⁻¹¹ Nm²Kg⁻²

M1 = 8000Kg

M2 = 1500 Kg

F =  6.67 * 10⁻¹¹ * 8000 * 1500 / (1.5)²

F = 3.56 * 10⁻⁴ N

The gravitational force of attraction between them is 3.56 * 10⁻⁴ N

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2. Leaves turning brown in the fall

Chemical or Physical or Both

What Evidences show that it’s Chemical, Physical, or Both:

Answers

This is a physical change.
I can say this because only the color is changing.... thus being a physical change.
chemical change
leaves turn another color as a result of a biochemical process

a cube has a length of 1.02 cm and a mass of .001012 kg what is its density ​

Answers

Answer:

d = 9.5× 10⁻⁴ Kg/cm³

Explanation:

Given data:

Length of cube = 1.02 cm

Mass of cube = 0.001012 Kg

Density of cube = ?

Solution:

The length , height and width of cube is always same. Thus the volume of cube is,

Volume = length × height× width

Volume = 1.02 cm × 1.02 cm × 1.02 cm

Volume = 1.06 cm³

Density of cube:

d = 0.001012 Kg /1.06 cm³

d = 9.5× 10⁻⁴ Kg/cm³

HURRY DONT HAVE MUCH TIME LEFT. Vegetarians do not eat animal products but rather derive their protein from plant sources. Which type of protein do vegetarian food sources lack?

Answers

Answer:

b12 and d3

Explanation:

A 2.00 L pocket of air at sea level has a pressure of 99.9 atm. What is the
pressure if the pocket of air rises and expands to 8.0 L? *
0.04 atm
O
400 atm
25 atm
52 atm​

Answers

Answer:

The answer is 25 atm

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

From the question we have

[tex]P_2 = \frac{2 \times 99.9}{8} = \frac{199.8}{8} \\ = 24.975[/tex]

We have the final answer as

25 atm

Hope this helps you

Answer:

25 atm

Explanation:

Hope I helped

Please help me and I’ll give you brainiest!!!!!!!!!



Have a wonderful day!!:)))

Answers

Answer:

up down up down thats the pattern

Explanation:

10 g of copper is heated and the mass increases to 12.5 g. What is the mass of the copper in the new substances? show with steps

Answers

Answer:

10 g

Explanation:

The heating of copper can be represented by the following equation:

Cu + 1/2O2 ----> CuO

The new substance is copper oxide, CuO.

From the law of conservation of matter which says that matter can neither be created nor destroyed but be converted from one form to another, it means that barring any loss during heating, all the Cu should be converted to CuO. Hence, the amount of copper in the new substance should remain 10 g.

describe the Rutherford model... and and what are its limitation...

going offline forever ✌️​

Answers

Answer:

Limitations of Rutherford Atomic Model

Although the Rutherford atomic model was based on experimental observations it failed to explain certain things. Rutherford proposed that the electrons revolve around the nucleus in fixed paths called orbits. ... Ultimately the electrons would collapse in the nucleus.

Ammonia is formed from the reaction of nitrogen and hydrogen according to the equation:
N2(g) + 3H2(g) 2NH3(g)
What is the maximum number of moles of ammonia that can be formed from the reaction of 27 moles of hydrogen?
A
41
B
27
18
D
9

Answers

Answer:

18 mol NH₃

General Formulas and Concepts:

Chemistry - Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

RxN:   N₂ (g) + 3H₂ (g) → 2NH₃ (g)

Given:   27 moles H₂

Step 2: Stoichiometry

[tex]27 \ mol \ H_2(\frac{2 \ mol \ NH_3}{3 \ mol \ H_2} )[/tex] = 18 mol NH₃

Step 3: Check

We are given 2 sig figs.

Since our final answer is in 2 sig figs, we do not need to round.

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Have a wonderful day!!:)))

Answers

Answer:

Explanation:

C

What is the connection between the Bohr Model and Atomic emission spectra of elements?

Answers

Explanation:

electrons move arround nucleus in the orbit such as sun in suria system..

According to Bohr's model, an electron would absorb energy in the form of photons to get excited to a higher energy level as long as the photon's energy was equal to the energy difference between the initial and final energy levels.

The graph shows a car's velocity over time. Velocity versus Time 60 40 Velocity, in mph forward 30 20 10 4 1 2 3 5 G Time, in seconds (s) What is the car's acceleration from 0 to 1 second? A. 8 mph/s B. 60 mph/s C. 10 mph/s D. 20 mph/s​

Answers

The car acceleration form 0 to 1 will be 20 mph/s.

What is acceleration?

The rate at which an object's velocity changes with respect to time is called acceleration. Accelerations are measured in terms of vectors. The orientation of the force is acting on an item determines the orientation of its acceleration. Acceleration can be calculated by using this formula:

a = v-u/ΔT.

where, a = acceleration, v = final velocity, u = initial velocity and T is temperature.

Calculation of acceleration.

It is given that v = 20 , u = 0,

ΔT can be calculated as,

[tex]=T_{2} - T_{1} \\= 2-1\\ = 1[/tex]

Now , put the values given data in acceleration formula

a = 20-0/ 1

= 20 mph/ s.

Therefore, acceleration of car will be 20 mph/s.

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