How are molecules built?
All of these

Phase Changes

Atomic Rays

Bonding

1

Answers

Answer 1

Answer:

By bonding due to the attractive forces


Related Questions

GIVING OUT BRAINLIEST!!!!!!!!!
Which substance has the lowest specific heat?
O Beach sand
O
Beach water
O Ice
Pool water

Answers


Uhhhh I pretty sure it’s pool water

Which of the following is NOT an advantage of a wireless network? convenience reliability security speed

Answers

Answer:

Security

Explanation:

A wireless network consists of good connection with fast speed, convenience, and reliability. Security is a major problem with wireless connection as someone can get your information by joining the same connection as you.

How many electrons will the lithium atom give up to become stable?

a. 1
b. 2
c. 3
d. 4

Answers

Recall that most atoms are stable when their outermost ring has eight electrons. (Some atoms, such as lithium and beryllium, are stable when their outermost ring has two electrons.)

Answer: 2

Explanation: that’s the answer for the quiz

If a piece of cadmium with a mass of 37.60 g and a temperature of 100.0 oC is dropped into 25.00 cc of water at 23.0 oC, what will be the final temperature of the system

Answers

Answer:

[tex]T_{eq}=28.9\°C[/tex]

Explanation:

Hello!

In this case, since it is observed that hot cadmium is placed in cold water, we can infer that the heat released due to the cooling of cadmium is gained by the water and therefore we can write:

[tex]Q_{Cd}+Q_{W}=0[/tex]

Thus, we insert mass, specific heat and temperatures to obtain:

[tex]m_{Cd}C_{Cd}(T_{eq}-T_{Cd})+m_{W}C_{W}(T_{eq}-T_{W})=0[/tex]

In such a way, since the specific heat of cadmium and water are respectively 0.232 and 4.184 J/(g °C), we can solve for the equilibrium temperature (the final one) as shown below:

[tex]T_{eq}=\frac{m_{Cd}C_{Cd}T_{Cd}+m_{W}C_{W}T_{W}}{m_{Cd}C_{Cd}+m_{W}C_{W}}[/tex]

Now, we plug in to obtain:

[tex]T_{eq}=\frac{37.60g*0.232\frac{J}{g\°C}*100.00\°C+25.00g*4.184\frac{J}{g\°C}*23.0\°C}{37.60g*0.232\frac{J}{g\°C}+25.00g*4.184\frac{J}{g\°C}}\\\\T_{eq}=28.9\°C[/tex]

NOTE: since the density of water is 1g/cc, we infer that 25.00 cc equals 25.00 g.

Best regards!

QUESTION 3 What mass (in g) of glucose, C6H1206, must be added to 300.7 g of water to prepare a 0.322 molal solution? Enter your answer with 3 significant figures and no units.

Answers

Answer:

17.42 g of glucose, C₆H₁₂O₆

Explanation:

From the question given above, the following data were obtained:

Mass of water = 300.7 g

Molar solution = 0.322 M

Mass of glucose =.?

Next, we shall convert 300.7 g to L. This can be obtained as follow:

1000 g = 1 L

Therefore,

300.7 g = 300.7 g × 1 L / 1000 g

300.7 g = 0.3007 L

Next, we shall determine the number of mole of glucose in the molar solution. This can be obtained as follow:

Volume of solution = 0.3007 L

Molar solution = 0.322 M

Mole of glucose =?

Molar solution = mole / Volume

0.322 = mole of glucose / 0.3007

Cross multiply

Mole of glucose = 0.322 × 0.3007

Mole of glucose = 0.0968 mole

Finally, we shall determine the mass of glucose, C₆H₁₂O₆, needed to produce prepare the solution. This can be obtained as follow:

Mole of C₆H₁₂O₆ = 0.0968 mole

Molar mass of C₆H₁₂O₆ = (12×6) + (1×12) + (16×6)

= 72 + 12 + 96

= 180 g/mol

Mass of C₆H₁₂O₆ =?

Mole = mass /Molar mass

0.0968 = Mass of C₆H₁₂O₆ / 180

Cross multiply

Mass of C₆H₁₂O₆ = 0.0968 × 180

Mass of C₆H₁₂O₆ = 17.42 g

Thus, 17.42 g of glucose, C₆H₁₂O₆ is needed to prepare the molar solution.

PLEASE HELP WILL MARK BRAINLIEST
how does the container with the plastic wrap stimulate carbon dioxide in the atmosphere?

Answers

Answer:

The Earth’s greenhouse effect is a natural consequence of the chemical makeup of its atmosphere. If it

were not for the greenhouse effect, life as we know it could not exist on Earth: it would be too cold. Our

atmosphere is made mostly of nitrogen and oxygen, but also contains several other gases. These include

carbon dioxide, methane, nitrous oxide, water vapor and ozone, which are known as greenhouse gases.

Greenhouse gases are released naturally through geologic processes and the metabolic activity of living

things. However, there is an ongoing debate over human effects on Earth’s global climate. Human industrial activity on the planet has increased the quantities of greenhouse gases through agriculture, manufacturing, power generation, and engines used for transportation. Key questions include: Is the average temperature of Earth increasing? Does the presence of human beings contribute to global warming? If the temperature of Earth does become warmer, how will it affect us?

Explanation:

The concentration of hydrogen peroxide solution can be determined by
titration with acidified potassium manganate(VII) solution. In this reaction
hydrogen peroxide is oxidised to oxygen gas. A 5.0 cm sample of hydrogen
peroxide solution was added to a volumetric flask and made to 250 cm
of the aqueous solution. A 25.0 cm sample of this solution was acidified
and reacted completely with 24 35 em of 0.0187 mol dm potassium
manganate(VII) solution
(ay Write a balanced equation for the reaction between acidified KMnO
solution and H.O.
(b) Calculate the concentration of the original H,O, solution in mol dm​

Answers

The question is incomplete, the complete reaction equation is;

The concentration of a hydrogen peroxide solution can be determined by titration

with acidified potassium manganate(VII) solution. In this reaction the hydrogen

peroxide is oxidised to oxygen gas.

A 5.00 cm3 sample of the hydrogen peroxide solution was added to a volumetric flask

and made up to 250 cm3 of aqueous solution. A 25.0 cm3 sample of this diluted

solution was acidified and reacted completely with 24.35 cm3 of 0.0187 mol dm–3

potassium manganate(VII) solution.

Write an equation for the reaction between acidified potassium manganate(VII)

solution and hydrogen peroxide.

Use this equation and the results given to calculate a value for the concentration,

in mol dm–3, of the original hydrogen peroxide solution.

(If you have been unable to write an equation for this reaction you may assume that

3 mol of KMnO4 react with 7 mol of H2O2. This is not the correct reacting ratio.)

Answer:

2.275 M

Explanation:

The equation of the reaction is;

2 MnO4^-(aq) + 16 H^+(aq) + 5H2O2(aq) -------> 2Mn^+(aq) + 10H^+ (aq) + 8H2O(l)

Let;

CA= concentration of MnO4^- =  0.0187 mol dm–3

CB = concentration of H2O2 = ?

VA = volume of MnO4^- = 24.35 cm3

VB = volume of H2O2 = 25.0 cm3

NA = number of moles of  MnO4^- = 2

NB = number of moles of H2O2 = 5

From;

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

CB = CAVANB/VBNA

CB = 0.0187 * 24.35 * 5/25.0 * 2

CB = 0.0455 M

Since  

C1V1 = C2V2

C1 = initial concentration of H2O2 solution = ?

V1 = initial volume of H2O2 solution =  5.0 cm3

C2 = final concentration of H2O2 solution= 0.0455 M

V2 = final volume of H2O2 solution = 250 cm3

C1 = C2V2/V1

C1 = 0.0455 * 250/5

C1 = 2.275 M

A solution with a pH value between 1 and 6

Answers

Answer:

One possible answer could be lemon juice

Explanation:

We had to do a water test, and I was looking up what pH levels were. Then I learned about it in school, so I know a thing or two about it :)

Possible other answers include stomach acid and cola.

Hope this helps!!

A 600. mL beaker has an inner diameter of 77.0 mm. What is the vertical distance between the 100. mL marks on the side of the beaker

Answers

Answer:

[tex]h=12.9cm[/tex]

Explanation:

Hello!

In this case, since we can consider the beaker until the 100-mL mark as a cylinder, we can use the following equation to relate its diameter, vertical distance or height and volume:

[tex]V=\pi h\frac{d^2}{4}[/tex]

Thus, since we know the diameter, volume (which is equivalent to 600 cm³) and π, we can plug in to obtain:

[tex]600cm^3=\pi *h*\frac{(77.0mm)^2}{4}[/tex]

It means it is necessary to take the mm to cm and solve for h:

[tex]h=\frac{600cm^3}{\pi*\frac{(7.70cm)^2}{4}} \\\\h=12.9cm[/tex]

Best regards!

The distance between each 100 mL mark is 2.15 cm.

The volume of a cylinder is obtained using the formula;

V = πr^2h

Now, we have the following information;

Volume of the cylinder = 600. mL or 600 cm^3

Diameter of the cylinder = 77 mm or 7.7 cm

Radius of the cylinder = 7.7/2 = 3.85 cm

Height of the cylinder  = h

Hence;

600 = 3.142 × ( 3.85 )^2 × h

h = 600/3.142 × ( 3.85 )^2

h = 12.88 cm

There are six 100 mL marks on the beaker, the distance between each 100 mL mark =  12.88 cm/6 = 2.15 cm

Learn more about volume: https://brainly.com/question/12748872

Please help!!! The person who gets it right gets brainlist

Answers

Answer:B because all of the atoms exploded AND GRAVITY WAS CREATED AND forced molecules together (God caused it btw)

Explanation:The BIBLE

Which equation could be used to solve for the average speed of a car that travels 90m in 20 seconds?​

Answers

Answer:

Vav=d/t

Explanation:

Because the question already gave d=90m and t=20s. Because the car is the thing that can not travel the same distances at the same times.So the equation is V[tex]\\_{av}[/tex]=[tex]\frac{d}{t} \\[/tex]

What are the rows of the periodic table called?

Answers

Answer:

"The elements are arranged in seven horizontal rows,called periods or series,and 18 vertical columns,called Groups."

Explanation:

Risk*

Aton Van Leeuwenhoek was the first scientist to discover prokaryotic organisms. These single-celled organisms lack a nucleus and other membrane bound organelles but do have a cell membrane, DNA, and even a cell wall. Choice one of the answer. A. All known living things are made up of one or more cells. B. All living cells come from pre-existing cells by division. C. A cell is the fundamental unit of structure and function in all living organisms. D. No answer text provided

Answers

Answer: a

Explanation:

What are the outcomes of the ice cap melting? Choose all that apply.


1. Light cannot be reflected back to the atmosphere


2. Sea level rises


3. Absorption of solar radiation leads to increase in ocean temperature


4. Ocean remains unaffected

Answers

Answer:

2. sea level rises sorry if it's wrong

What is one reason a fuse may blow out? NEED HELP NOW

Answers

Answer:

Too high voltage which can't be held by the fuse

Use the following reaction:

CuCl2 + 2 NaNO3 → Cu(NO3)2 + 2 NaCl

If 90.0 grams of copper (II) chloride react with 120.0 grams of sodium nitrate, how much sodium chloride can be formed (in grams)?

Answers

Answer:

78.4g

Explanation:

Given parameters:

Mass of copper (II) chloride  = 90g

Mass of sodium nitrate  = 120g

Unknown:

Mass of sodium chloride that can be formed  = ?

Solution:

The balanced chemical reaction is:

            CuCl₂   +   2NaNO₃ →   Cu(NO₃)₂   +   2NaCl

Let us find the limiting reactant. This reactant will determine the extent of the reaction of the amount of product that will be formed.

First, convert the masses to number of moles;

      Number of moles  = [tex]\frac{mass}{molar mass}[/tex]

Molar mass of   CuCl₂  = 63.5 + 2(35.5) = 134.5g/mol

Molar mass of NaNO₃   = 23 + 14 + 3(16) = 85g/mol

  Number of moles of CuCl₂ = [tex]\frac{90}{134.5}[/tex]  = 0.67mole

  Number of moles of NaNO₃  = [tex]\frac{120}{85}[/tex]  = 1.41mole

From the balanced reaction equation:

      1 mole of CuCl₂   would react with 2 moles of NaNO₃

     0.67mole of CuCl₂   would require   0.67 x 2  = 1.34mole of NaNO₃

So, CuCl₂ is the limiting reactant

     1 mole of CuCl₂ will produce 2 mole of NaCl

    0.67mole of CuCl₂ will therefore yield 0.67 x 2 = 1.34mole of NaCl

Mass of NaCl = number of moles x molar mass

  Molar mass of NaCl = 23 + 35.5 = 58.5g/mol

 

Mass of NaCl  = 58.5 x 1.34  = 78.4g

What element contains 8 valence electrons and tends not to react with other elements?

Answers

Answer:

C. Oxygen

Explanation:

Oxygen has 8 electrons and doesn't react with fluorine noble gases

As ice cream freezes do the chemical properties of the substance change? Explain why or why not?

Answers

Yes. When ice cream is melted is a liquid and therefore jot a solid. When it freezes it becomes a solid

Why is your body going through physical and chemical changes?

Answers

Answer:

Physical and chemical changes can occur almost everywhere, even in our bodies! Food must be broken down into a form that our cells can use. When we eat, our bodies physically break down food into small pieces. Our bodies also chemically break down those small pieces of food into tiny organic molecules.

Explanation:

Which of these factors are biotic? (SELECT ALL THAT APPLY.)
animals
light
minerals
water
plants

Answers

Answer:

plants

Explanation:

because it produces ( i am a third grade student and don't know if it is right or not)

Elements in the same group of the periodic table have the same number of

Answers

Answer:

valence electrons

The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements. Every element in the first column (group one) has one electron in its outer shell.

___C3H8 + ___O2 --> ___H2O + ___CO2

Answers

Answer:

C3H8 + 5O2 ‐‐‐‐‐‐‐‐> 4H2O + 3CO2

Mg(s)+2HCl(aq)  →  MgCl2(aq)+H2(g)

In an experiment, a student places a small piece of pure Mg(s) into a beaker containing 250.mL of 6.44MHCl(aq) . A reaction occurs, as represented by the equation above.


(a) Write the balanced net ionic equation for the reaction between Mg(s) and HCl(aq) .

Answers

Answer:

[tex]Mg(s)+2H^+(aq)\rightarrow Mg^{2+}(aq)+H_2(g)[/tex]

Explanation:

Hello!

In this case, since the writing of a net ionic equation first implies writing the complete molecular equation:

[tex]Mg(s)+2HCl(aq) \rightarrow MgCl_2(aq)+H_2(g)[/tex]

We can see that HCl and MgCl2 are ionized because they are aqueous, thus we write:

[tex]Mg(s)+2H^+(aq)+2Cl^-(aq) \rightarrow Mg^{2+}(aq)+2Cl^-(aq)+H_2(g)[/tex]

In such a way, we can cancel out the chloride ions as they are the spectator ones to obtain the net ionic one:

[tex]Mg(s)+2H^+(aq)\rightarrow Mg^{2+}(aq)+H_2(g)[/tex]

Best regards!


How many atoms are in .938 moles of CO2?

Answers

Answer: 1.695x10^24 atoms

Explanation: 0.938 moles CO2 = 0.938xavogadro number molecules CO2, so number of atoms = 3x0.938x6.02214076x10^23 = 1.695x10^24

what is fractional distillation what is fractional distillation explain it with the help of an activity ​

Answers

Answer:

Fractional distillation is a method for separating liquids with different boiling points. For example, liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation. ... The boiling point of ethanol is 78°C and the boiling point of water is 100°C.

A mixture of ethyne gas (C2H2) and methane gas (CH4) occupied a certain volume at a total pressure of 16.8 kPa. When the sample burned, the products were CO2 gas and H2O vapor. The CO2 was collected and its pressure found to be 25.2 kPa in the same volume and at the same temperature as the original mixture. What percentage of the original mixture was methane

Answers

Answer:

50%

Explanation:

Let assume that there are:

"a" moles of CH4 & "b" moles of C2H2

Then by applying the ideal gas equation:

PV = nRT

[tex]16.8 \times 10^3 \times V = (a+b)RT[/tex]

Make (a+b) the subject of the formula:

[tex](a+b) = \dfrac{16800 \ V }{RT} mol[/tex] --- (1)

Since 1 mole of CH₄ yields 1 mol of CO₂ & 1 mol of C₂H₂ yields 2 moles of CO₂

Then;

the total moles of CO₂ = (a +2b)

Now:

[tex]25.3 \times 10^3 \times V = (a+ 2b)RT[/tex]

[tex](a + 2b) = \dfrac{25200 \ V}{RT \ mol}[/tex]    ---- (2)

By solving the above equations

[tex]a = \dfrac{8400 \ V}{RT} \\ \\ b = \dfrac{8400 \ V}{RT}[/tex]

Hence, the estimate of the percentage of methane in the original mixture is:

[tex]= 100 \times \dfrac{a}{(a+b)}[/tex]

[tex]= 100 \times \dfrac{8400\dfrac{ \ V}{RT} }{8400\dfrac{ \ V}{RT} + 8400\dfrac{ \ V}{RT}}[/tex]

= 50%

please explain energy flow from producer to consumer.
and please explain energy flow from consumer to consumer.

Answers

Answer:

1-Ecologists call this one-way flow of matter and energy from a producer to a primary, then to secondary, and perhaps to a tertiary consumer, a food chain. The food web shows all the organisms at each feeding level or trophic level.

2-Energy flows through an ecosystem in one direction: from producer to primary consumer to secondary consumer to higher consumers. A biomass pyramid provides a picture of the feeding and energy relationships within a food web and the direction of the flow of energy.

Answer:

food

Explanation:

water vapour is the solid form of water.


True

False


Answer and I will give you brainiliest

Answers

Answer:

False

Explanation:

Water vapour exists in gas phase!

water vapor is the gas form of water therefore it is false

pleaseee help thank youu​

Answers

Answer:

i just took it the answers is C

Explanation:

It’s d hope it’s correct I triedjsjjddjsnsnshsje

Prokaryotic is an example of a/an-

A:tissue
B:cell type
C:organ
D:organism

Answers

Answer:

B. Cell Type

Explanation:

that is the answer i believe

Answer:

option b- cell type

Explanation:

almost absolutely positive

Other Questions
Select all equations that have graphs with the same y-intercept. y = 3x - 8y = 3x - 9y = 3x + 8y = 5x - 8y = 2x - 8y = (1/3)x - 8 7/2x + 1/2x = 10 + 9/2x Summarize the history of radioactivity by choosing the scientist(s) involved with each discovery. conducted experiments with uranium-containing minerals and pure uranium. came up with the term radioactivity. showed that uranium in a mineral gave off radiation even without being exposed to the Sun. discovered radium and polonium. conducted experiments with fluorescent minerals and photographic plates. 7.2.6: First Character CodeHS"Write a function called first_character that takes a string as a parameter and returns the first character.Then, write another function called all_but_first_character that takes a string as a parameter and returns everything but the first character.Test each of your functions on the string "hello" and print the results. Your output should be:" Can someone plz help:( Which of the following would most likely be reduced when combined with Al(s)?Will be giving brainliest Proving triangle similarity given QR PT and QPR STR prove PQR TSR help!What would an author mean if they used the metaphor, The outstanding student was the apple of her teachers eye? 1/9 blank exponent 2 One of the best inventions to capture images in space was placed in Eartis orbit in 1990 and isthere ty)ATelescope VB)Newton TelescopeGalileo TelescopeD)Hubble Space Telescope please, I beg those who know Match each term with the appropriate phrase. HELP I NEED HELP ASAP 1. What did Henri Becquerel discover aboutradiation emitted from uranium salts? Match each line from King's speech to the type of rhetorical technique it best shows."there are insufficient funds in theallusiongreat vaults of opportunity""go back to Mississippi, go back toAlabama, go back to South Carolina"repetition"let freedom ring from every hill andmolehill of Mississippi"metaphor"with its vicious racists"connotation Roberto wants to display 18 sports cards in an album. Some pages hold 2 cards and others hold 3 cards. How many different ways can Roberto display his figures? The line: "I heard the familiar "jug--jug--SPAT!" of a motorcycle, and a frantic policeman rode alongside" best demonstrates which literary device? Jeff uses a solar cell to run a small motor. What energy transformation occurred?(A) Light to electric to potential(B) Light to electric to kinetic(C) Electric to solar to kinetic(D) Kinetic to electric to mechanical What's the rhyme scheme of the poem? The clouds by frank d shermanThe sky is full of clouds to-day, And idly, to and fro, Like sheep across the pasture, they Across the heavens go. I hear the wind with merry noise Around the housetops sweep, And dream it is the shepherd boys, They're driving home their sheep. The clouds move faster now; and see! The west is red and gold. Each sheep seems hastening to be The first within the fold. I watch them hurry on until The blue is clear and deep, And dream that far beyond the hill The shepherds fold their sheep. Then in the sky the trembling stars Like little flowers shine out, While Night puts up the shadow bars, And darkness falls about. Pls help :( this is really hard and I need to pass this grade lol