HELP HELP HELP HELP !!!!!!

HELP HELP HELP HELP !!!!!!

Answers

Answer 1
I think is C try it I hope this helps

Related Questions

The shadow of a groundhog ( or anything else ) is determined what?

Answers

The size, length, and height of the figure are the main factors which determine the shadow of a organism.

The size, length, and height of the figure are the main factors which determine the shadow of a organism.

What is a shadow?

A shadow is a dark area where light from a light source is blocked by an opaque object. It occupies all of the three-dimensional volume behind an object with light in front of it. The cross section of a shadow is a two-dimensional silhouette, or a reverse projection of the object blocking the light.

A point source of light casts only a simple shadow, called an "umbra". For a non-point or "extended" source of light, the shadow is divided into the umbra, penumbra, and antumbra. The wider the light source, the more blurred the shadow becomes. If two penumbras overlap, the shadows appear to attract and merge. This is known as the shadow blister effect.

Learn more about shadow,here:

https://brainly.com/question/20323273

#SPJ2

Which planet is considered to be the most earth like despite the fact it has the hottest surface temperature?

Answers

Answer:

Venus

Explanation:

Similar in structure and size to Earth, Venus spins slowly in the opposite direction from most planets. Its thick atmosphere traps heat in a runaway greenhouse effect, making it the hottest planet in our solar system with surface temperatures hot enough to melt lead.

Answer:

Venus

Explanation:

Hope helps

What unit should you think of when using coefficients?

Answers

Answer:

Far as I know coefficients are unitless. sorry if this don't help ;)

Pls help ASAP it’s timing meeee!!!!!

Answers

I THINK IM TOO LATE BHAHABB

What is the Same about carbohydrates, proteins , and fats ?

Answers

Answer:

The main similarity between carbohydrates, proteins and fats is that they are all used for energy.

Explanation:

I hope this helps, have a blessed day.

What is the difference between chemical change and physical change

Answers

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. Hope this helps!

Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

What is the IUPAC name of the following compound?

Answers

Answer:

2,6–dimethylcyclohexanol

Explanation:

To name the compound given in the question above, we must first obtain the following:

1. Determine the functional group of the compound.

2. Locate the longest continuous carbon chain.

3. Identify the substituent group attached to the compound.

4. Locate the position of the substituent group.

5. Combine the above to obtain the name of the compound.

Now, we shall determine the name IUPAC name of the compound. This can be obtained as follow:

1. The compound contains the –OH group. Thus, the compound is an alcohol.

2. The compound is a cyclic compound with six carbon forming the ring. Thus, the parent name of the compound is cyclohexane. Thus, the presence of the –OH group changes the parent name of the compound to cyclohexanol.

3. The substituent group attached to the compound is methyl (–CH₃)

NOTE: There are two –CH₃ groups attached to the compound.

4. The position of the 1st –CH₃ group is at carbon 2, while the 2nd is at carbon 6.

NOTE: Counting is done from the carbon bearing the functional group.

5. Therefore, the name of the compound is:

2,6–dimethylcyclohexanol

how many moles of an NH3 can be produced from 2.82 moles of nitrogen in the following reaction:

Answers

n(NH3)=n(N2)*2=3.76*2=7.52 moles
(based on chemical reaction rates)

In the graph above, what is the relationship between volume and temperature? Does this data support Charles' Law?

Hint: is it a direct or inverse relationship? How does volume change with temperature changes?

Answers

Answer:

No the graph does not support Charles' Law.  Both volume and temperature increase so it would be a direct relationship.

Explanation:

5. A 23.9 g piece of metal heated to 97.8 °C is placed in 52.4 g water at 21.9 °C. After the
metal is added, the temperature of the water rises to 29.9 °C. Calculate the specific heat of the
metal. Express your answer in the units of cal/g°C.

Answers

Answer:

Explanation:

Here we'll use our formula for specific heat, Q=mcΔT.

Q= Heat (Joules), m=mass (g), c=specific heat

ΔT= (final temperature - initial temperature)

When we add a heated piece of metal in water at a lower temperature, the metal will lose heat and the water will absorb that heat. Over time they will eventually reach an equilibrium, here we have it at 21.9 C. If you recall in thermodynamics, , when we lose heat it is exothermic and the values of exothermic reactions are negative, and the values of endothermic reactions are positive. So we can say the heat of the metal is exothermic and releasing heat into the water until they reach equilibrium, thus they are equal. Keeping in mind Q= heat,

-Q metal = Q water.

We can expand this equation to -mcΔT= mcΔT.

Our equation reflects what is happening to the metal and the water.

Before we start, it might be helpful to remember that the

c=specific heat of water= 4.186 J/g C

Let's plug in what we know and solve for c=specific heat of metal. I'll start with the left side then go to the right side.

-(23.9g)(c)(29.9-97.8) = (52.4g)(4.184)(29.9 - 21.9)

-(23.9gc)(29.9-97.8) = (52.4g)(4.184)(29.9 - 21.9)

-(23.9g)(c)(-67.9) = (52.4g)(4.184)(29.9 - 21.9)

1623c = (52.4g)(4.184)(29.9 - 21.9)

1623c = (52.4g)(4.184)(8)

1623c = 1754

c= [tex]\frac{1754}{1623}[/tex]

c= 1.08

This means it takes less heat to raise the temperature of the piece of metal ( in comparison to the water, which require more ).

Why do we have a leap year in our calendar every four years?

Answers

Answer:

every 4 years we add an extra day, February 29th, to our calendars these extra days called leave days help synchronize our human created calendars with us orbit around the sun and the actual passing of our seasons

The breakdown of proteins produces

A. Carbon dioxide

B. Urea

C. Water

Answers

Answer:

B.Urea

Explanation:

When an amino acid is broken down, the nitrogen it contains is converted into urea by the liver which then is excreted via the kidneys.

Answer:

urea

Explanation:

when u eat proteins the body breaks them down into amino acids . Ammonia is produced from leftover amino acids and it must be removed from the body. the liver produces many chemicals (enzymes) that change ammonia into a form called ureas

Share what you have learned about first aid to your family......

please help me with this.​

Answers

Answer:

[tex] \huge\pink{ \mid{ \underline{ \overline{ \tt Answer :- }} \mid}}[/tex]

=> First Aid enables you to assist persons who become injured in the event of an accident or emergency situation until help arrives.

[tex] \huge\blue{ \mid{ \underline{ \overline{ \tt Situations :- }} \mid}}[/tex]

=> If an accident happens in the workplace, in your home or in a public space, you can use the help of a first aid kit.

=> In situations such as when someone ingests a harmful substance, suffers from a heart attack, a seizure or stroke, is involved in a motor vehicle accident or is caught in a natural disaster, a person trained and knowledgeable in even the very basics of First Aid can be of extreme importance in assisting the injured person(s) until emergency responders arrive.

In both industry and research there are often times when one particular component of a mixture needs to be separated from a solution. Maybe it is a rare metal that is dissolved in a mixture of minerals. Maybe it is a particular protein from lysed plant cells. If the desired component is volatile, distillation could be used. But if the goal is to separate ions in solution, fractional precipitation is preferred.

a. True
b. False

Answers

Answer:

a. True

Explanation:

Distillation process is a process that is used to separate the components or the substances from the liquid mixtures by using selectively boiling and condensation.

While fractional precipitation is a process which separates the ions from solution based on the different solubilities.

Therefore, the answer is true.

What is the mass of 7.004 x 1023 molecules of calcium chloride?

Answers

Answer:

Bubv amp hindi marunong amp

What is the number of moles in 4.81 L of H2S gas at STP?

Answers

Answer:

1.19 is the answer

Explanation:

Si tengo 56 gramos de amoniaco gaseoso (NH3) ¿Cuántos moles y moléculas (entidades elementales) podré obtener?

Answers

Answer: 56 grams of gaseous ammonia (NH3), has 3.28 moles and [tex]19.80 \times 10^{23}[/tex] molecules.

Explanation:

Given: mass of [tex]NH_3[/tex] = 56 g

Molar mass of [tex]NH_3[/tex] is 17.03 g/mol.

As moles of a substance are its mass divided by the molar mass. Therefore, moles of [tex]NH_3[/tex] are calculated as follows.

[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{56 g}{17.03 g/mol}\\= 3.28 mol[/tex]

According to the mole concept, 1 mole of every substance contains [tex]6.022 \times 10^{23}[/tex] molecules. Hence, number of molecules present in 3.28 moles of [tex]NH_3[/tex] are calculated as follows.

[tex]No. of molecules = no. of moles \times 6.022 \times 10^{23}\\= 3.28 mol \times 6.022 \times 10^{23}\\= 19.80 \times 10^{23}[/tex]

Therefore, we can conclude that 56 grams of gaseous ammonia (NH3), has 3.28 moles and [tex]19.80 \times 10^{23}[/tex] molecules.

A generator makes electricity from _____.

chemical reactions
kinetic energy
heat
friction

Answers

A generator makes electricity from kinetic energy.

What is one benefit that nuclear power plants currently provide for our environment?
O A. They provide energy without increasing carbon dioxide emissions.
O B. They provide energy without increasing nuclear waste.
C. They provide energy while increasing natural gas pollution.
O D. They provide energy while increasing biomass by-products.

Answers

Explanation:

Nuclear power plants deliver electricity 24 hours a day, 7 days a week, irrespective of weather and seasons. As well as reducing greenhouse gas emissions, nuclear generation helps reduce air pollution

Answer:

D

Explanation:

Just did the test

What does the dash mark of the 1800s style periodic table represent and tell the original name for element 68

Answers

Answer: element 68 is Erbium, should there be a picture attached?

Explanation:

All solutes will dissolve at some point.
O True
O False

Answers

Answer:

False

Explanation:

in which block does chlorine lies



Answers

Answer:

P-block

Explanation:

Chlorine

Atomic number (Z) 17

Group group 17 (halogens)

Period period 3

Block p-block

Answer:

What does "in which block does chlorine lies"? That question has no way to answer it because there is no question content lol

Explanation:

vbvjkkkp[kpojsdbfoijaefoibhfeboqi

Answers

Answer:

sdfhioupsdfiuhikdfjsdfhsdksdflk";d089sdfojskdfk

pls give brainlyest

Explanation:

200 IQ intellectual right here ^^

The number of atoms in a 158.4 g sample of CO2 gas at STP is:

1.277 x 1025 atoms

2.167 x 1024 atoms

6.502 x 1024 atoms

6.651 x 1024 atoms

Answers

Answer:

6.502 x 10²⁴ atoms.

Explanation:

First we convert 158.4 g of CO₂ into moles, using carbon dioxide's molar mass:

158.4 g ÷ 44 g/mol = 3.6 mol CO₂

Then we calculate how many CO₂ molecules are there in 3.6 moles, using Avogadro's number:

3.6 mol CO₂ * 6.023x10²³ molecules/mol = 2.168x10²⁴ CO₂ molecules

As there are 3 atoms per CO₂ molecule, we triple the number of CO₂ molecules in order to get the answer:

2.168x10²⁴ CO₂ molecules * 3 = 6.504x10²⁴ atoms

The closest answer is the third option,  6.502 x 10²⁴ atoms.

what happens to gas molecules as the pressure is increased while the temperature and volume of the container remain constant according to the kinetic molecular theory

Answers

Answer:

According to the kinetic molecular theory of gases, the average speed and kinetic energy of gas molecules would INCREASE.

Explanation:

In the kinetic molecular theory of gases, assumptions were made based on macroscopic properties of gas (pressure, volume and temperature) which are as a result of the microscopic properties like the position and the speed of the gas molecules. The kinetic molecular theory explains the behaviour of gases through the following 5 assumptions made about an ideal gas;

--> Molecules of a gas are in constant and rapid motion in straight lines until they collide with one another and with the walls of their containers.

--> The actual volume occupied by the had is negligible compared with the volume of the container.

--> Forces of attraction or repulsion between the molecules of a gas are negligible

--> The collision between the molecules is perfectly elastic.

--> The average kinetic energy of the gas molecules is proportional to the temperature of the gas.

Because gas molecules are in constant motion, it has kinetic energy which can be altered when there is increase in pressure. An increase in pressure will cause gas molecules to collide more frequently with one another. This in turn leads to increase in average speed and the kinetic energy of the individual molecules.

When a certain nuclide undergoes alpha emission, astatine-217 is produced. What is the identity of the nuclide that underwent decay?
a. actinium-219
b. francium-217
c. francium-221
d. astatine-221
e. actinium-221
Please explain the answer

Answers

Answer:

C: francium-221

Explanation:

First of all to get a broader perspective, every isotope of francium usually undergoes decay to form astatine, radium, or radon.

Now, Francium-223 and francium-221 are it's only isotopes that occur in nature.

However, francium-221 is the one that undergoes alpha decay to produce astatine-217.

PLZ HELP "NO LINKS"
A vessel of volume 22.4 dm3 contains 2.0 mol H2(g) and 1.0 mol N2(g) at 273.15 K.
(a) Calculate the mole fractions of each component.
H2:

N2:

(b) Calculate the partial pressures of each component.
H2:

N2:

(c) Calculate the total pressure.

Thanks!

Answers

Answer: (a) Mole fraction of [tex]H_{2}[/tex] is 0.66.

Mole fraction of [tex]N_{2}[/tex] is 0.33

(b) The partial pressure of [tex]H_{2}[/tex] is 1.98 atm.

The partial pressure of [tex]N_{2}[/tex] is 0.99 atm.

(c) The total pressure is 3.0 atm

Explanation:

Given: Volume = [tex]22.4 dm^{3}[/tex]  (1 [tex]dm^{3}[/tex] = 1 L) = 22.4 L

Moles of [tex]H_{2}[/tex] = 2.0 mol

Moles of [tex]N_{2}[/tex] = 1.0 mol

Total moles = (2.0 + 1.0) mol = 3.0 mol

Temperature = 273.15 K

Now, using ideal gas equation the total pressure is calculated as follows.

[tex]PV = nRT\\[/tex]

where,

P = pressure

V = volume

n = number of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

[tex]PV = nRT\\P \times 22.4 L = 3.0 mol \times 0.0821 L atm/mol K \times 273.15 K\\P = 3.0 atm[/tex]

The mole fractions of each component:

The mole fraction of [tex]H_{2}[/tex] is calculated as follows.

[tex]Mole fraction = \frac{moles of H_{2}}{moles of H_{2} + moles of N_{2}}\\= \frac{2.0 mol}{(2.0 + 1.0) mol}\\= 0.66[/tex]

The mole fraction of [tex]N_{2}[/tex] is as follows.

[tex]Mole fraction = \frac{moles of N_{2}}{moles of H_{2} + moles of N_{2}}\\= \frac{1.0 mol}{(2.0 + 1.0) mol}\\= 0.33[/tex]

The partial pressures of each component:

Partial pressure of [tex]H_{2}[/tex] are as follows.

[tex]P_{H_{2}} = P_{total} \times mole fraction of H_{2}\\= 3.0 atm \times 0.66\\= 1.98 atm[/tex]

Partial pressure of [tex]N_{2}[/tex] are as follows.

[tex]P_{N_{2}} = P_{total} \times mola fraction of N_{2}\\= 3.0 atm \times 0.33\\= 0.99 atm[/tex]

You and several novice researchers decide to set up some experiments in an attempt to explain why potassium reacts with oxygen to form a superoxide. One of your team members proposes that potassium's capacity to form a superoxide compound is related to a low value for the first ionization energy. If you wanted to validate this hypothesis, indicate two metals other than potassium (in order of increasing atomic number) that you could examine to see if they also form superoxides when reacted with oxygen gas.

Required:
Express your answers as chemical symbols separated by a comma.

Answers

Answer:

Rubidium and cesium

Explanation:

It is noteworthy to say here that larger cations have more stable superoxides. This goes a long way to show that large cations are stabilized by large cations.

Let us consider the main point of the question. We are told in the question that the reason why potassium reacts with oxygen to form a superoxide is because of its low value of first ionization energy.

The implication of this is that, the other two metals that can be examined to prove this point must have lower first ionization energy than potassium. Potassium has a first ionization energy of 419 KJmol-1, rubidium has a first ionization energy of 403 KJ mol-1 and ceasium has a first ionization energy of 376 KJmol-1.

Hence, if we want to validate the hypothesis that potassium's capacity to form a superoxide compound is related to a low value for the first ionization energy, we must also consider the elements rubidium and cesium whose first ionization energies are lower than that of potassium.

g A student determines the number of moles of water in a hydrated metal oxide by weighing a clean, dry crucible and lid while the crucible is empty, then reweighing the crucible and lid with a sample of the hydrate, heating the crucible and lid with a Bunsen burner and then reweighing the crucible and lid with the sample after cooling to room temperature. Which error will result in too high a value for the amount of water of hydration

Answers

The question is incomplete, the complete question is;

A student determines the number of moles of water in a

hydrated metal oxide by weighing a clean, dry crucible

and lid while the crucible is empty, then reweighing the

crucible and lid with a sample of the hydrate, heating the

crucible and lid with a Bunsen burner and then

reweighing the crucible and lid with the sample after

cooling to room temperature. Which error will result in

too high a value for the amount of water of hydration?

(A) The heating is conducted only once instead of the

three times recommended by the procedure.

(B) The lid is left off the crucible when it is weighed

with the hydrated oxide.

(C) The metal oxide reacts partially with oxygen in the

air, forming a compound in a higher oxidation state.

(D) Some of the heated oxide is spilled from the crucible

before it can be weighed.

Answer:

(D) Some of the heated oxide is spilled from the crucible

before it can be weighed.

Explanation:

It is possible to determine the number of moles of water in a hydrated metal oxide by weighing a clean, dry crucible and lid while the crucible is empty, then reweighing the crucible and lid with a sample of the hydrate. The crucible and lid with the sample are heated, cooled and reweighed.

As this process is going on, suppose some of the heated oxide is spilled from the crucible, then the mass of heated or anhydrous oxide decreases leading to a consequent increase in the number of moles of water in the hydrated metal oxide, hence the answer above.

The too high a value for the amount of water of hydration error is occur due to heating of given hydrated sample.

What is hydrated compounds?

Hydrated compounds are those compounds in which water molecule is present with the normal compound.

To get the correct value of weight of hydrated compound, first we have to weigh the empty crucible and lid and then with sample of compound in the crucible and lid. After this substract empty weigh of crucible & lid from the sample-crucible-lid weigh. If we substract the weigh from heated sample crucible and lid, then we get the error because the hydrated water molecule may decompose due to heating and moles of water increases.

Hence, error will occur if we heat the sample.

To know more about hydrated compound, visit the below link:

https://brainly.com/question/16275027

When H2(g) reacts with F2(g) to form HF(g) , 542 kJ of energy are evolved for each mole of H2(g) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.

Answers

Answer:

H₂(g) + F₂(g) ⇒ 2 HF(g)   ΔH°rxn = -542 kJ

Explanation:

Let's consider the unbalanced equation that occcurs when H₂(g) reacts with F₂(g) to form HF(g).

H₂(g) + F₂(g) ⇒ HF(g)

In order to get the balanced equation, we will multiply HF(g) by 2.

H₂(g) + F₂(g) ⇒ 2 HF(g)

To convert a balanced equation into a thermochemical equation, we need to add the standard enthaply of the reaction, considering that 542 kJ of energy are evolved for each mole of H₂(g) and there is 1 mole of H₂(g) in the balanced equation. By convention, when energy is released, it takes a negative sign. The thermochemical equation is:

H₂(g) + F₂(g) ⇒ 2 HF(g)   ΔH°rxn = -542 kJ

Other Questions
Which of the following is something that all living organisms have in common ? A.) They all contain at least one cell . B.)They all need a source of oxygen . C.) They all use other organisms for food . D.)They all find mates to reproduce . 1.- Cul es la estructura del sujeto?2.- Cmo se halla el sujeto de una oracin?3.- Escribe el orden que debes seguir al analizar una oracin.4.- Estructura del predicado nominal (SV-PN).5.- Cundo un verbo copulativo funciona como cpula en una oracin?6.- Estructura del complemento directo (C.D.).7.- Cul es la estructura del atributo?8.- Estructura del complemento indirecto (C. I.).9.- Estructura del complemento de rgimen (C. Rg.).10.- Estructura del complemento predicativo (C. Pvo.).11.- Estructura del complemento agente (C. Ag.).12.- Cmo diferenciamos el complemento predicativo del atributo?13.- Cmo diferenciamos el C. Pvo. Del CC de modo?14.- En qu se parece un C. Rg. a un CD?15.- Cmo se localiza un complemento directo?16.- Qu relacin hay entre el complemento directo y el sujeto paciente?17.- Cundo pueden coincidir en una oracin el atributo y el CD?18.- Qu es un verbo transitivo?19.- Qu es un verbo intransitivo?20.- Cmo se localiza en una oracin el complemento indirecto?21.- Cmo distinguimos CD y CI al pronominalizar?22.- Qu lesmo est admitido?23.- Diferencia entre un complemento directo y un atributo.24.- Cmo distingo el complemento directo del complemento indirecto?25.- Cmo se diferencia el CC del CN?26.- Cmo se diferencia el complemento agente del complemento circunstancial de causa?27.- Qu funciones puede tener un adverbio?28.- Qu funciones puede tener un adjetivo?29.- Cul es la funcin de una preposicin?30.- Cul es la funcin de una conjuncin?xfavor si m pueden ayudar es urgentenosupe q materia ponerle I will give the crown this it is prob easy f(x) = f(x) = 1,264(1.09)x A. W,R,BB. A,R,BC. W,T,BD. A,T,NHELP ASAPP AND DONT GIVE ME A LINK BECAUSE THE LINK IS FAKE I NEED A REAL ANSWER !!!! A coworker asks you for help with something and you're busy finishing up a task, what should you say? A I'm busy right now but I'm happy to help when I'm finished B I'm kind of busy can you ask someone else C I don't have time to help you today Cause and EffectThe building of the Erie Canal led to this city becoming a major center of commerce and trade: hiplz helpppp meeeee! i dont know what to to do PLEASE HELP!!!!!!!!!!!!!!!!!! x2 + bx 12 where b is some whole number (noA polynomial is written asdecimals). If we're able to factor the polynomial, what are all the possible values of b?Explain how you know. Domain and range again pls :) What is the pronoun of this sentence The lady to.......you spoke just now is my teacher . Relatives clauses Solve for X.Then, solve for Y.Finally, solve for Z. The larger of two numbers is 12 more than the smaller number the sum of the number is 26 find the numbers Review the KWL chart.A 3-column table with 1 row. Column 1 is labeled What I Know with entry Blank. Column 2 is labeled What I Want to Know with entry Blank. Column 3 is labeled What I Learned with entry Blank.The purpose of a KWL chart is toa)discover the central idea of a text.b)list the facts and examples found in the text.c)help the reader connect to the text.d)list the sensory descriptions found in the text. Simplify:[tex]\left(\frac{1}{3}+\frac{3}{4}\right)[/tex] [tex]\left(\frac{5}{6}\right)^{2}[/tex]Plz give step-by-step solution. Suppose that there is a black urn containing nine black balls and three yellow balls and there is a yellow urn containing six black balls and six yellow balls. An experiment consists of selecting at random a ball from the black urn and then (without replacing the first ball) selecting at random a ball from the urn having the color of the first ball.1. Construct a tree diagram showing the probabilities associated with this problem. Write a probability on each branch (6 branches). Multiply the the probabilities along each path and write that number at the end of the path (4 answers).2. Find the probability that the second ball is yellow. what shows the equation written in form ax^2+bx+c=0? x^2+6x+8=3 How do you think we could solve the problem of plastic pollution in our oceans? 30 POINTS - PICKING BRAINLIEST ANSWERSelect the correct button in the table to show whether each characteristic describes slaves working in the fields, in the planters home, or at skilled jobs.* could sell their services to other people* had to serve the planters family 24 hours a day* allowed to keep a portion of money earned* worked on the same task at the same time as everyone else* could earn enough money to buy their freedom* often had better food, clothing, and shelter The temperature at noon was 56F. It fell 4F each hour until 3 PM. What was the temperature at 3 PM? A. 40FB. 44F C. 48F D. 52F