Chemistry High School

Moles /Number of Particles Con
A) Convert the following to Moles
(1) 2.03X1022 atoms of lithium, Li

Answers

Answer 1

(2.03x10^22)/(6.02x10^23) = .033721 mol Li

I hope this helps, if not, i am sorry

Related Questions

How many
How long does it take to go
from a new moon to a third
quarter?

Answers

Answer:

about three weeks

Explanation:

because after a full moon, which is about 21 days, it comes to a third quarter moon

What is “rounding up”?

Answers

It makes the number simpler by putting it up to the next ten ex. 37 will be rounded up to 40

What happens to water when it freezes?

its mass increases
its mass decreases
its density increases
its density decreases

Answers

Explanation:

When an object undergoes a physical change (solid to liquid, decrease in temperature etc.), the mass of the object remains constant.

When water freezes, the water molecules vibrate closer to one another and there is less space between the molecules.

The same number of water molecules now occupy a smaller volume, therefore their density increases.

The correct answer is the 3rd option.

At the time when the water should be freezed so here the density should be decreased.

What is density?

The density refers to the mass of the unit volume with respect to the material substance.

The formula for density should be d = M/v

So here d means the density

And, m means mass

V means the volume

So it should be expressed in units with respect to the units of grams per cubic centimeter.

Hence the last option is correct.

Learn more about water here: https://brainly.com/question/24720645

Please help If You Are Able To. Where do these go?

Answers

Answer:

Sorry can't help

Explanation:

Cant help!

Can someone help me on this letter E please

Answers

I think it’s Carbon dioxide

The answer is not 53.4. Please help.

Answers

Answer:

it is 0.528 ATM.

Explanation:

Hi guys . I'm having some troubles with physics and chemistry .
Do you know any sites or apps that can help me with any topic in physics and chemistry ( apart from Khan academy ) ?

Note : The site or app has to be able to teach and explain topics in Physics and Chemistry . ​

Answers

Explanation:

byju's ig. Cause it gives a proper concept

Question 11 of 25
How do home computer scanners use electromagnetic waves?
A. The waves are absorbed or reflected to capture images or
information
B. The scanners change information received into modified radio
waves
C. The waves are absorbed by objects, making them warmer.
D. The waves make objects brighter, making them easier to see.
Ffff

Answers

Answer:

a.The waves are absorbed or reflected to capture images

Explanation:

How Things Work: TSA scanners use electromagnetic waves for detection. ... These waves are bounced off the body of the person being scanned to create a three-dimensional image on the computer. The backscatter units instead bounce low-level electromagnetic X-rays off the body to create an image on the computer

Answer:

A. The waves are absorbed or reflected to capture images or

information

Explanation:

scientific notation, fill in the blank.

7.95x10^7 = [ ? ]x 10^6

Answers

Answer:

79.5

Explanation:

7.95x10^7 IS 79500000.

If you bring the decimal point left 6 more times it would be 79.500000

Emilio wants to tell a friend where an element's name is located within it's box in the periodic table. Which of the following is an accurate explanation to find an element's name?



the name is at the top of the box

the name is the large letter or letter combination in the box

the name is the word below the large letter combination in the box

the name is the last piece of information in the box

Answers

Answer:

A

Explanation:

hope this helps!

The name is the word below the large letter combination in the box

how many moles of methane are in 7.31*10^25 molecules?

Answers

Answer:

121 mol CH₄

General Formulas and Concepts:

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Chemistry

Organic

Writing chemical compoundsWriting organic structuresPrefixesAlkanes, Alkenes, Alkynes

Atomic Structure

Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:

Step 1: Define

7.31 × 10²⁵ molecules CH₄

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]\displaystyle 7.31 \cdot 10^{25} \ molecules \ CH_4(\frac{1 \ mol \ CH_4}{6.022 \cdot 10^{23} \ molecules \ CH_4} ) = 121.388 \ mol \ CH_4[/tex]

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

121.388 mol CH₄ ≈ 121 mol CH₄

How many moles are in 7.91 X 1022 atoms of He?

Answers

Answer:

amount of He = (7.91 × 10^22) ÷ (6.02 × 10^23) = 0.131mol (3sf)

Explanation:

you make use of the mole concept formula

amount(mol) = number of particles ÷ 6.02 × 10^23

(6.02 × 10^23 is the avogadro constant, which is an extremely important number in this formula for mole concept)

Fun fact! <3
An apple, potato, and onion all taste the same if you eat them with your nose plugged

Answers

Answer:

:O Fr? Bet let me go get them lol

✧ Yes, since one of our senses are missing we won't really detect the taste.

Explanation: Think about it, we usually smell food and we can already tell if it's going to taste good or not. Looking or touching food doesn't always help to know if we will like the taste. ✧

help me with cience for brainest:) its easy:)

Answers

Answer:

Stronger

And its science

Explanation:

Answer:

stronger for top.

weaker for bottom.

passed all sciences in freshman year :D

How many hydrogen atoms Is needed for C4H8 to become saturated

Answers

Answer:

2 atoms

Explanation:

Because it contain one double bond

A crystal of quartz may be part of granite, sandstone, and the
metamorphic rock quartzite. Identify how that same crystal could be
found in all three rocks at different times.





HELP ME WITH THIS QUESTION

Answers

The list of minerals that commonly form rocks is short. With a little practice you will recognize most of them when you see them. Descriptions of some of the minerals, as they look in rocks, follow Quartz is the last mineral to crystallize, so in igneous rocks it never has any definite shape. In rocks, it does not show flat faces. It is usually gray in igneous rocks; gray, white, yellow, or red in sedimentary rocks; and gray or white in metamorphic rocks. It has a glassy, or sometimes waxy, look to it. Hope this helps :)

The monomers of carbohydrates are called?

Answers

Answer:

monosaccharides

Explanation:

Monomers of carbohydrates are simple sugars and the basic building blocks of carbohydrates, they are also known as monosaccharides and are used by the cells of living things to store and produce energy.

Answer:

"the simple sugars" or Monosaccharides

Explanation:

Monosaccharides are the monomers of carbohydrates they are mostly called or referred to as "the simple sugars" hope this helped have a nice day (:

plz mark brainliest (:

What conversion factors
determine the number of
molecules from the number of
moles of a compound?

Answers

Answer: Avogrado's number, or 6.022 x 10^23

Explanation:

To convert from moles to atoms, multiply the molar amount by Avogadro's number. To convert from atoms to moles, divide the atom amount by Avogadro's number (or multiply by its reciprocal).

Describe the brightness and temperature of the stars classified as giants.

Answers

Answer:

A hotter star should be brighter than a cooler star. ... Although they are cool [red], they are very luminous, and therefore bright. In the Main Sequence, stars that are cool are not as luminous. Because the energy is spread across a larger area, surface temperatures are actually cooler, reaching only 2,200 to 3,200 degrees Celsius (4,000 to 5,800 degrees Fahrenheit), a little over half as hot as the sun

Explanation:

How many molecules are there in 31.8 moles of water?
1.91 x 1025 molecules
1.91 x 1022
5.28 x 10-23 molecules
5.28x 10.25

Answers

Answer:

[tex]31.8\ moles = 1.91 * 10^{25}\ molecules[/tex]

Explanation:

Given

31.8 moles of water

Required

Determine the number of molecule

In standard units: 1 molecule of water is:

[tex]1\ mole = 6.022 * 10^{23}\ molecules[/tex]

Multiply both sides by 31.8

[tex]31.8 * 1\ mole = 31.8 * 6.022 * 10^{23}\ molecules[/tex]

[tex]31.8\ moles = 31.8 * 6.022 * 10^{23}\ molecules[/tex]

[tex]31.8\ moles = 191.4996 * 10^{23}\ molecules[/tex]

Express 191.4996 as a standard form

[tex]31.8\ moles = 1.914996 * 10^2 * 10^{23}\ molecules[/tex]

Apply law of indices:

[tex]31.8\ moles = 1.914996 * 10^{2+23}\ molecules[/tex]

[tex]31.8\ moles = 1.914996 * 10^{25}\ molecules[/tex]

Approximate:

[tex]31.8\ moles = 1.91 * 10^{25}\ molecules[/tex]

What is the mass of a 270 cm3 sample of a metal with density of 3.66 g/cm3?

Answers

Answer:

988.2 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 3.66 × 270

We have the final answer as

988.2 g

Hope this helps you

Can you please help me ASAP

Answers

Answer:

The Milky Way is a large barred spiral galaxy

Explanation: that has more than etc

Predict the balanced product for the acid base reaction of phosphoric acid with ammonium hydroxide.

Answers

Answer:

htt ps://w ww.you  tube. com/watch?v =oyy377 Yoj4I

Explanation:

The temperature of a city during a week was 35° C, 36°C, 34°C, 38°C, 40°C, 39°C and 44°C. What was the average daily temperature of the town for the week?

Answers

Answer:38°

Explanation:

The table provided shows the properties of four elements.

Based on this data, it is reasonable to conclude that which element is a metalloid?

A) 1
B) 2
C) 3
D) 4

Answers

By my guess, It would either be A) 1 because by research and what i’ve learned, Metal is a good conductor for Electricity and Heat. It’s also shiny and bendable, so that would be my best guess.
Hope this helped. :)

What mass of potassium would react with excess chlorine to produce 156 g of potassium chloride?
____ K + ____ Cl2 ____ KCl

Answers

Answer:

Explanation:

Oxygen is prepared by catalytic decomposition of potassium chlorine (KClO3). Decomposition of potassium, chloride gives potassium chloride (KCl) and oxygen (O2). How many moles and how many grams of KClO3 are required to produce 2.4 mole O2?

Density can be calculated by dividing an object's mass by its volume. If the mass of an object is 10 grams and its volume is 2 milliliters, what is its density?

Answers

Explanation:

mass =10g. volume=2ml. density=mass/volume = 10/2=5kg/m^3

Answer:

5 g/mL

Explanation:

So, if the mass is 10 g and the volume is 2 mL, the density equals...

10 g ÷ 2 mL = 5 g/mL

PLEASE HELP ASAP Chet is creating a catapult that will allow him to propel a ball farther than he is capable of throwing it. As he is creating the device, he finds that that catapult launches the ball straight up into the air. The catapult should propel the ball up and forward to create a trajectory.

Which of the following is the best solution to this problem?

A.
leave the design as is because the ball goes higher than he can throw it

B.
make changes to the design to allow it to launch the ball a farther distance

C.
discard the device and begin the engineering process again from the start

D.
leave the design as is but perform more tests to see if the problem improves

Answers

Answer:

IM NOT COMPLETELY SURE BUT ITS ETHER A OR B IM SORRY ;//

Explanation:

Why is calcium carbonate preferred over lumps of calcium carbonate for synthesis of calcium chloride

Answers

Answer:

it reacts to limestone better and is a bit more firmer and mostly preferred over because of how fast it can react towards chemicals

What is a daughter element

Answers

Answer:

The element formed when a radioactive element undergoes radioactive decay. The latter is called the parent. The daughter may or may not be radioactive.

Explanation:

hope this helps

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