PLZ HELP ME!!!!!!!!!!!!!!!

Answer:

1.51

⋅

10

24

Explanation:

This is a pretty straightforward example of how to sue Avogadro's number to figure out the number of molecules present in a given sample.

In your case, the sample is said to contain  

2.50

moles of water. Now, a mole is simply a very, very large collection of molecules. In order to have  

1

mole of a molecular compound you need your sample to contain  

6.022

⋅

10

23

molecules of that compound.  

plz give my a brainylist

The water molecules are in a block of ice containing 0.750 mole of water. The number of water molecule is 4.52 x 10²³molecules.

Molecules are defined as a group of two or more atoms that together create the lowest recognizable unit into which a pure material can be separated while retaining its makeup and chemical qualities.

It can also be defined as a group of two or more atoms held together by attractive forces called as chemical bonds.

There are mainly three types of molecule.

1 mole of water molecules = 6.022 x 10²³ molecules

So, 0.750 mole of molecules = 6.022 x 10²³ x 0.750

                                                 = 4.52 x 10²³ molecules

Thus, the water molecules are in a block of ice containing 0.750 mole of water. The number of water molecule is 4.52 x 10²³molecules.

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Answer:

See Below.

Explanation:

This is a conversion problem:

Using the molar mass of Gold (given in a periodic table) which is 196.97g/mol

you have

[tex](3.60*10^-5 g) *\frac{1moles}{196.97g}[/tex]

you always arrange the equation in a way to cancel whatever you don't want (grams) and leave what you do want (moles). Here grams cancel (top and bottom), so you're left with:

[tex]\frac{(3.60*10^-5 g) *(1)}{196.97} = 1.83*10^-7[/tex] moles of Gold

Answer: In metallic bonding, valence electrons can move freely between atoms

Explanation:

when metals bond to one another, their outermost energy levels overlap. this allows valence electrons to move freely between atoms in what is sometimes called a “sea of electrons

Answer:

If you change the number of neutrons somehow, nothing will happen because it carry's no charge at all.

Explanation:

Answer:

02

Explanation:

all the other options given are compounds

Answer:

boiling point

Explanation:

Option B

Answer:

P

Explanation:

Explanation:

2.3346591 miles is in 12327 feet

Answer:

Explanation:

Always remember, to convert

feet to miles, all you have to do is

divide the length by 5280 and then

you will get this much miles: 2.3346591

Hope this helps! <3

Answer:

okay whats the question

Explanation:

Yes you are correct. There are 2 categories of energy, kinetic and potential.

Answer: Conduction

Explanation:

Answer:

A burning match represents an exothermic reaction. The chemicals release energy in the form of heat and light as the reaction progresses.

Explanation:

Sample Response

Answer:

P.E. = mgh, where m is the mass in kilograms,

Answer:

[tex]m = \frac{PE}{gh} [/tex]

Explanation:

[tex]if \: PE = mgh \\ then \to \\ m = \frac{PE}{gh} [/tex]

♨Rage♨

%yield = 54.6%

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

(theoretical)

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

Reaction

2ZnS+3O₂ ⇒ 2ZnO+2SO₂

MW ZnS = 97.474 g/mol

[tex]\tt \dfrac{150}{97.474}=1.54[/tex]

MW ZnO = 81.38 g/mol

[tex]\tt \dfrac{2}{2}\times 1.54=1.54[/tex]

[tex]\tt 1.54\times 81.38=125.33~g[/tex]

Theoretical production = 125.388

[tex]\tt \dfrac{68.5}{125.33}\times 100\%=\boxed{\bold{54.6\%}}[/tex]

Answer:

30 feet /second

Explanation:

60 feet/ 2 sec = 30 feet/sec

Answer:

30 feet/sec

Explanation:

Average speed = distance / time (distance divided by time)

Average speed = 60 feet / 2 seconds

Average speed = 30 feet/sec

So the anverage speed is 30 feet per second

HOPE IT HELPED

Answer:

For drinking.

For cleaning dishes.

For cooking.

for watering plants.

for washing clothes.

for bathing.

for generation of hydroelectricity.

for washing car.

making our dog bath

it helps in maintaining osmotic rate in humans

Explanation:

Hope this helps u

Crown me as brainliest

Answer:

drinking,washing clothes ,washing dishes ,cooking,watering plants,cleaning ,for generation of hydroelectricity,washing vehicles,aquatic life,bathing

Explanation:

follow me pls.

Answer:

true I think not sure

Explanation:

Answer:

Its saying how many electronics are in your house.

Explanation:

Such as a tablet or a tv.etc

Answer:

It has shells of protons and neutrons.

Explanation:

The nuclear structure of an atom is similar to the non-nuclear structure because has shells of protons and neutrons.

An atom consists of a central nucleus that is usually surrounded by one or more electrons.

The total number of neutrons plus protons in the same both before and after the nuclear process, although the total number of protons and the total number of neutrons may be different before and after.

Hence, the nuclear structure of an atom is similar to the non-nuclear structure because has shells of protons and neutrons.

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Answer:

The factor is called a "catalyst." The wine sours more slowly when stored in closed bottles because there's no "oxygen" inside the bottle that could lead to an increase rate of decomposition.

Explanation:

Wines are naturally stored with a cork. The cork prevents oxygen from entering into the bottle. As you probably know, wines have natural bacteria which play a role in the process of fermentation. Once bacteria are introduced to oxygen, they multiply. However, in the process of fermentation, there's no oxygen present. So, once the bottle of wine is opened, it should be consumed immediately because exposing it to air will change its flavors.

A "catalyst" is a factor that affects reaction rates. Their presence hastens the time for decomposition.

6 g/cm³

Hi there !

density formula

d = m/V

V = 33.0ml - 25.0ml = 8.0 ml = 8 cm³

m = 48.0 g

replace

d = 48g/8cm³ = 6 g/cm³

Good luck !

Answer:

based on the table, element Q participate in ionic bonding because both potassium and sodium transfers its electrons to element Q, forming ions that attract each other.

Answer:

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{1.23\times {10}^{18} }{6.02 \times {10}^{23} } \\ = 0.00002043...[/tex]

We have the final answer as

Hope this helps you

Answer:

:)

Explanation:

Answer:

16.68 m/s

Explanation:

The following data were obtained from the question:

Height (h) = 14.2 m

Initial Velocity (u) = 0 m/s

Final velocity (v) =?

Thus, the velocity (v) with which the ball hit the ground can be obtained as follow:

v² = u² + 2gh

NOTE: the acceleration due to gravity (g) = 9.8 m/s²

v² = u² + 2gh

v² = 0² + 2 × 9.8 × 14.2

v² = 0 + 278.32

v² = 278.32

Take the square root of both side

v = √278.32

v = 16.68 m/s

Therefore, the velocity with which the ball hit the ground is 16.68 m/s

Answer:

Altogether for both models; two red jellybeans, two white jellybeans, two black jellybeans and six blue jellybeans.

Note: Since no specific color was stated for oxygen atoms, the answer assigns blue colored jellybeans to represent oxygen atoms.J

Explanation:

Sodium bicarbonate, NaHCO₃ is a compound composed of one atom of sodium, one atom of hydrogen, one atom of carbon and three atoms of oxygen.

Since red jellybeans represent sodium atoms, white jellybeans represent hydrogen atoms, black jellybeans represent carbon atoms and blue jellybeans represent oxygen atoms, each of the two students will require the following number of each jellybean for their model of sodium carbonate: One red jellybean, one white jellybean, one black jellybean and three blue jellybeans.

Altogether for both models; two red jellybeans, two white jellybeans, two black jellybeans and six blue jellybeans.

Answer:

Elements

Explanation:

The   elements which are represented by a single uppercase letter, or represented by an uppercase letter followed  by a lowercase letter. This tells you the types of elements in the compound.

Elements are one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means. They are made up of small indivisible particles called atoms, all having the same number of protons.

Answer::

*Gravitational potential energy transforms into thermal energy.*

O Gravitational potential energy transforms into kinetic energy.

O Gravitational potential energy transforms into thermal energy.

In this case, both options A and B are correct.

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