which situation best represents convection

Answers

Answer 1

Answer:

A hot air balloon taking off

Explanation:


Related Questions

What happens to the limiting reactant during the course of the chemical reaction?

Answers

Answer: The limiting reactant is the reactant that gets consumed first in a chemical reaction and therefore limits how much product can be formed.

Explanation:

^

Which statement is correct?
A. Physical changes produce new substances; chemical changes do not.
B. Chemical changes produce new substances; physical changes do not.
C. Both physical changes and chemical changes produce new substances.
D. Neither physical changes nor chemical changes produce new substances.

Answers

Answer:

B. Chemical changes produce new substances; physical changes do not.

Explanation:

Physical changes only alter appearances, while chemical changes are interactions that create new chemical formulas.

2. How many moles are in 2.8 Liters of CO2 gas?

Answers

Answer:

0.125 moles

Explanation:

2.8 litres is equivalent to 2.8dm³

At STP,

1 mole = 22.4 dm³

x mole = 2.8 dm³

Cross multiply

22.4x = 2.8

Divide both sides by 22.4

x = 2.8/22.4

x = 0.125

Savvas Realize. Investigation 8 Experiment 1

Answers

Answer:

–1065.25 KJ of energy.

Explanation:

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

4FeO + O₂ —> 2Fe₂O₃  ΔH = –560.66 kJ

From the balanced equation above,

The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.

Finally, we shall determine the amount of heat energy released when 3.8 moles of Fe₂O₃ are produced. This can be obtained as follow:

From the balanced equation above,

The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.

Therefore, the formation of 3.8 moles of Fe₂O₃ will release

= (3.8 × –560.66)/2 = –1065.25 KJ of energy.

Thus, –1065.25 KJ of energy is released from the reaction.

PLEASE HELP WITH CHEM !! Calculate the [OH-] of each of the following solutions given the [H+]. AND Classify each of the solutions in the question above as either acid, base, or neutral. AND FIND THE PH

Answers

pH, pOH, [H+], and [OH-] are all interrelated. For simplicity, we assume that we're working with aqueous solutions at 25 °C.

The following mathematical relations are relevant here:

pH = -log[H⁺]pOH = -log[OH⁻][H⁺] = 10^-pH[OH⁻] = 10^-pOHpH + pOH = 14[H⁺] × [OH⁻] = 10^-14

A pH of 7 is neutral; a pH less than 7 is acidic; and a pH greater than 7 is basic.

---

We are given four solutions of varying [H⁺], and we want to find the pH and the [OH⁻]. The pH will tell us whether the solution is neutral, an acid, or a base.

Finding the [OH⁻]

Using the relationship [H⁺] × [OH⁻] = 10^-14, we can calculate the [OH⁻] of each solution by dividing 10^-14 by the given [H⁺]:

[OH⁻] = 10^-14/(3.3 × 10^-5) = 3.0 × 10^-10

[OH⁻] = 10^-14/(4.0 × 10^-8) = 2.5 × 10^-7

[OH⁻] = 10^-14/(7.2 × 10^-11) = 1.4 × 10^-4

[OH⁻] = 10^-14/(8.2 × 10^-4) = 1.2 × 10^-11

Note: While not indicated here, the units for [H⁺] and [OH⁻] are moles/liter (M).

Finding the pH

To find the pH of each solution, we take the negative logarithm of the [H⁺] with base 10, i.e., pH = -log₁₀[H⁺]:

pH = -log(3.3 × 10^-5) = 4.48

pH = -log(4.0 × 10^-8) = 7.40

pH = -log(7.2 × 10^-11) = 10.14

pH = -log(8.2 × 10^-4) = 3.09

Note that, for significant figures involving logarithms, the number of decimal places should equal the number of significant figures in the argument of our logarithm (the argument is what we're taking the -log of). Since we're taking the -log of quantities given to two significant figures, our corresponding pH values are given to two decimal places.

Acid, Base, or Neutral?

As mentioned above, a pH = 7 is neutral, a pH < 7 is acidic, and a pH > 7 is basic.

4.48 < 7, so the first solution is an acid.

7.40 > 7, so the second solution is a base.

10.14 > 7, so the third solution is a base.

3.09 < 7, so the fourth solution is an acid.

What are the two major causes of genetic disorders in humans?

Answers

Some genetic disorders are caused by mutations in the DNA while other disorders are caused by changes in the overall structure or number of chromosomes.

Answer:

genetic mutation or the environmental exposures

Pls help me with this problem

Answers

Answer:

2 and 5 would be my answers

Explanation:

give me a example of physical
pls

Answers

Answer:

An example of physical is plant life growing in the ground. An example of physical is someone confined to a wheelchair because of disabilities. Of, or produced by the forces of physics.

Explanation:

Your opinion on chocolate

What is your opinion on chocolate, any kind like white chocolate dark, etc. also what do you think is the bad side of chocolate?

Answers

Answer:

Milk Chocolate

Explanation:

Some chocolates contain lots of sugar, but for Dark chocolate its healthy

Answer:

Milk chocolate the bad side of chocolate is getting fat

Explanation:

have u ever tried shreks snickers before?

1. Cancer is a disease in which cells

a. grow and divide uncontrollably. b. die before they can mature.

c. stop producing DNA. d. die during mitosis.

____ 2. Which of these traits is controlled by a gene with multiple alleles?

a. straight hairline b. smile dimples

c. widow’s peak d. blood type

____ 3. Which of these is an example of the benefits of genetic engineering?

a. cross-breeding to create disease-resistant crops

b. creating human insulin to treat people with diabetes

c. analyzing karyotypes and pedigree charts

d. growing a new plant from a cutting

____ 4. A carrier is a person who has

a. one recessive and one dominant allele for a trait.

b. two recessive alleles for a trait.

c. two dominant alleles for a trait.

d. more than two alleles for a trait.

____ 5. Sex-linked genes are genes on

a. the X chromosome only. b. the Y chromosome only.

c. the X and Y chromosomes. d. all 23 pairs of chromosomes.

______ 6. What is the chromosome theory of inheritance?

a. Chromosomes are carried from parents to offspring on hybrids.

b. Genes are carried from parents to offspring on chromosomes.

c. Hybrid pairs of chromosomes combine to form offspring.

d. Codominant genes combine to form new hybrids.

____ 7. How can a mutation affecting skin be harmful to an animal?

a. It can make the animal more visible to its prey or predators.

b. It can cause disease in the animal.

c. It can make the animal resistant to certain diseases.

d. It can make the animal resistant to drugs

______ 8. What happens during meiosis?

a. Two sex cells combine.

b. Chromosome pairs separate and are distributed into new sex cells.

c. Each sex cell copies itself to form four new chromosomes.

d. Chromosome pairs remain together when new sex cells are formed.

Answers

Answer:

1. a

2. a.

3. b.

4. a.

5. c.

6. b.

7. a.

8. c.

Explanation:

True or false?
A limitinh factor is an environmental factor that increases the growth of a population

True or false?
Biomes are characterized by temperature, precipitation, and the plant and animal communities that live there

Answers

The answers are :
1 - F
2- T
1 False
2 True

Good luck!!

Which region on the map has the highest risk of future landslides? a- Region 1 b-Region 2 c- Region 3 d- there is no way to make comparisons about the risk of future landslides? The subject is science (8th grade)

Answers

Answer:

Explanation:

Which region on the map has the lowest risk of future landslides?

what is the limiting reactant of 20.0 moles of o2 react with 30.0 moles of h2 according to the following reaction ? 2H2 + O2 = 2H2O

Answers

Answer:

The limiting reactant is hydrogen.

Explanation:

According to the balanced equation for synthesis of water, hydrogen is used up twice as fast as oxygen -- we need two moles of H2 for every one mole of O2 when creating water.

Since we have 20 moles of oxygen, this means we would need twice as much hydrogen, or 40 moles, to use it all up. There is only 30 moles of hydrogen, which means that all the hydrogen will be used before the 20 moles of oxygen is used. Hydrogen limits production in this case.

We have that

From the Question we are told that

20.0 moles of o_2

30.0 moles of h_2

Therefore

The ratio  

For more information on this visit

1. A block of plastic occupies a volume of 25.0 mL and weighs 20.5 g. What is its density? Circle or highlight
the correct answer. (5 pts)
a. 512 g/mL
c. 0.37 g/mL
b. 1.62 g/mL
d. 0.82 g/mL

Answers

I think answer should be d. Please give me brainlest let me know if it’s correct or not okay thanks bye

Which shows substances placed in order from strongest to weakest attractive forces at room temperature?
es )
A)
1. Br (s) 2. Br (9) 3 Br (1)
B)
1. Br (s) 2. Br (1) 3 Br (9)
1. Br (9) 2. Br (1) 3 Br (s)
D)
1. Br (aq) 2. Br (1) 3 Br (9)
Dhusical Dror

Answers

Explanation:

es la b es ciertos que es el resultado

What is the type of structure indicated below?
a- ionic structure
b-resonance structure
c- molecular structure
d-electron dot structure

Answers

Answer:

Electron dot structure

Explanation:

This is because electron dot structure is the structure that shows or indicate valence electrons of an atom and dots

is use around the element symbols . The number of dots shows the total number of valence electrons that are present in the atom of the molecules.

What type of chemical reaction is demonstrated by this equation? A+BX-AX+B

Answers

Answer:

d an acid - base reaction.

Explanation:

Answer:

single replacement

Explanation:Look it up and got it from quizlet it should be right.

describe each of the three states of matter (solid, liquid, gas)​

Answers

Explanation:

In a solid particles are firmly together and are stuck in a regular pattern

in a liquid particles still touch but arent in a fixed pattern

in a gas particles move quickly in all directions

What is the pH of an aqueous solution of HCl with a hydrogen ion
concentration of [H+] = 6.7 x 10-6 M? Round your answer to the nearest
hundredth.

Answers

Answer:

pH = 5.17

Explanation:

pH = -log[H+] = -log(6.7 x 10^-6) = 5.17

A drug company is testing the effects of a new drug designed to prevent hair loss. Of the 2,000 people in the trial, 1,700 people receive the drug and the other 30 people receive a sugar pill. What is the purpose of the group receiving the sugar pill? A. The group is being used as the control group B. The group is being used as the dependent variable C. The group is being used as the independent variable D. The group is being used as the manipulated variable

Answers

Answer:

A

Explanation:

The correct answer would be that the group being given the sugar pill is being used as the control group.

In a typical experimental study, there are two groups of subjects:

1. The treatment or the experimental group

2. The control group

The treatment group receives the treatment variable while the control group does not receive or is given a placebo. Thus, the control group act as the reference group for comparison basis. Any difference in the observation between the two groups would be attributed to the treatment variable.

The correct option is, therefore, A.

balanced the equation please Fe + O2 → Fe2O3

Answers

Answer: The balanced equation is 4,3,2,  

Answer: Balanced equation = 4Fe + 3O2 => 2Fe2O3.

Explanation:

Hannah made a diagram to show how plants make their own food. What should Hannah write to fill in the blank in the diagram?
A)
heat from the soil
B)
energy from the Sun
C)
heat from the roots
D)
energy from the wind
PLS SOME HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP I NEED HELPPPPPPPPPPP

Answers

Answer:

Answer: Energy from the sun.

Explanation:

If you look at the hints it says that it needs something else for a plant to grow and what does a plant need?

Air, Water, and energy from the Sun to make food

Hope this helps :)

Answer:

Energy from the sun

Explanation:

Which of the following processes occurs with a decreaseentropy of the system

Answers

Explanation: Entropy decreases when the number of moles of gas decreases during a reaction. In the case of the correct answer, the number of moles of gas decreases from two to one. When a substance goes from a solid to a gas (sublimation) or from a liquid to a gas (evaporation), entropy increases.

Benzoic acid, HC6H5CO2,is a monoprotic acid(only one H+ ionizes)with a Ka=6.5×10^-5. Calculate [H+] and the pH of a .32M solution of benzoic acid. PLEASE ANSWER. ​

Answers

Answer:

[H⁺] = 4.56x10⁻³ M

pH = 2.34

Explanation:

Hello there!

In this case, according to the ionization reaction of benzoic acid:

[tex]HC_6H_5CO_2+H_2O\rightleftharpoons C_6H_5CO_2^++H_3O^+[/tex]

Whereas [tex][H_3O^+]=[H^+][/tex], we can set up the equilibrium expression in terms of [tex]x[/tex] (reaction extent) to obtain:

[tex]Ka=\frac{[C_6H_5CO_2^-][H_3O^+]}{[HC_6H_5CO_2]} \\\\6.5x10^{-5}=\frac{x^2}{0.32-x}[/tex]

However, since Ka<<<1, we can neglect the [tex]x[/tex] on bottom to easily solve for it:

[tex]6.5x10^{-5}=\frac{x^2}{0.32}\\\\x=\sqrt{6.5x10^{-5}*0.32} \\\\x=4.56x10^{-3}[/tex]

Which is actually the same as [H⁺]. Finally, the pH turns out to be:

[tex]pH=-log(4.56x10^{-3})\\\\pH=2.34[/tex]

Best regards!

What element is found in water?

1. Carbohydrate

2. Carbon

3. oxygen

Answers

Explanation:

3. the element is oxygen

oxygen is in water! ;)

WILL MARK BRAINLIEST FOR CORRECT ANSWER

Continue reading from Ruby Bridges’s autobiography.

We drove down North Galvez Street to the point where it crosses Alvar. I remember looking out of the car as we pulled up to the Frantz school. There were barricades and people shouting and policemen everywhere. I thought maybe it was Mardi Gras, the carnival that takes place in New Orleans every year. Mardi Gras was always noisy.

As we walked through the crowd, I didn’t see any faces. I guess that’s because I wasn’t very tall and I was surrounded by the marshals. People yelled and threw things. I could see the school building, and it looked bigger and nicer than my old school. When we climbed the high steps to the front door, there were policemen in uniforms at the top. The policemen at the door and the crowd behind us made me think this was an important place.

It must be college, I thought to myself.

–Through My Eyes,
Ruby Bridges

What evidence in the text supports the idea that Bridges did not realize the significance of her first day? Check all that apply.

“I remember looking out of the car as we pulled up to the Frantz school.”

“I thought maybe it was Mardi Gras.”

“As we walked through the crowd, I didn’t see any faces.”

“[The school] looked bigger and nicer than my old school.”

“The crowd behind us made me think this was an important place.”

“It must be college, I thought to myself.”

Answers

Answer: I remember looking out of the car as we pulled up to the Frantz school.”

“I thought maybe it was Mardi Gras.”

“As we walked through the crowd, I didn’t see any faces.”

“[The school] looked bigger and nicer than my old school.”

“The crowd behind us made me think this was an important place.”

“It must be college, I thought to myself.

Explanation:

“I thought maybe it was Mardi Gras.”

“[The school] looked bigger and nicer than my old school.”

“It must be college, I thought to myself.”

El etanol combustiona con el oxigeno produciendo dióxido de carbono gaseoso y agua: En un proceso se hacen reaccionar 450.2 g de dioxígeno con 998. 2 g de etanol . a) ¿Cuál de los reactivos es el limitante? b) Calcule la masa de dióxido de carbono que se formará c) ¿ Cuanto del reactivo en exceso quedará sin reaccionar?

Answers

Answer:

uh oh stinky uh oh stinky

helllp meee pls . ....... ..... . . . . .
. . . . . . . . . .. . . . . ... .. . . . . ....... . . .. . . .. . . . . . . . . ... .. . . . ....

Answers

The answer is A “ mutations”

How does the environment in which an organism lives determine which traits are adaptations?
can someone plss help me??​

Answers

Answer:

When an organism lives in a certain environment there is a process called natural selection. Natural selection ensures that the organisms of a species with the best traits suited for an environment will reproduce and pass on those traits to the offspring.

Explanation:

The theory of natural selection was studied by Charles Darwin in The Origin of Species by Means of Natural Selection if you need more information.

Why should we work to protect estuaries? Select all that apply.
PLSSSS

Answers

Answer:

1, 3, and 4

Explanation:

I'm guessing, but those make the most sense

Answer:

3 and 4

Explanation:

Other Questions
jose is now six years older than john. in two years jose will be twice as old as john. How old is john now. How did the Ming dynasty expand and improve Chinese agriculture?O Farmers focused on growing traditional crops.The government raised taxes to repair farmland.Land was taken from the wealthy to use for agriculture.O Agricultural workers used old methods such as crop rotation. Please help me Algebra 1 what are the most serious economic problems facing the united states Look at this section from the table of contents for When Birds Get Flu. CONTENTS 8. OVERHEARD IN THE LAB: Whats the Word?10. SEE FOR YOURSELF: Nothing to Sneeze At12. WHOS WHO? The Medical Team15. CASE #1: The Mystery of the Killer Bird Flu! An 11-year-old-girl and her mother die from a serious flu. Is this the start of a worldwide health crisis?If you wanted to learn common vocabulary and words scientists use, which page would you turn to?8101215 NO LINK IF YOU PUT A LINK YOU WILL GET REPORTED 1. True or False: You have to flip the inequality symbol in this problem. -23> -5.3x +12.True or False: You have to flip the inequality symbol in this problem. 3x + 1 < -263.True or False: You have to flip the inequality symbol in this problem. 3/5 x + 3 -12 4.True or False: You have to flip the inequality symbol: -2x - 2/5 -95True or False: You have to flip the inequality symbol: x-5/-2 -46.True or False: You have to flip the inequality symbol:x-3/2 4 Which of the following is NOT a type of business organizationA)CorporationB) PartnershipC)Sole ProprietorshipD)Entrepreneurship Hey guys 25 points and brainliest! At the beginning of the year, there were 35 members in the club. The club started a Bring a Friend program that it believes will increase its membership by 3 new members each month.If the Bring a Friend program attracts the exact number of new members it expects, which of theses equations represents the number of new members (n) the club will have after m months? Answer please! URGENT Choose the correct verb to complete the sentence." ( ) ustedes ir a la playa este fin de semana?"PodisPuedoPodemosPueden HURRY!!!! What is the volume, in cubic inches, of the right rectangular prism with a length of 5 inches, a width of 8 inches, and a height of 20 inches Question 5 (10 points) [03.02] Which word best describes the mood of this stanza from Edgar Allen Poe's "A Dream?" (10 points) In visions of the dark night I have dreamed of joy departed But a waking dreams of life and light Hath left me broken-hearted. a Warm b Violent c Sorrowful d Optimistic Calculate the pH of the solutions with the following [OH-]. antonio and emilia are painting a room in their new house. antonio could finish the job in only 6 hours by himself, while emilia could finish the job in only 4 hours by herself. how long would it take them if they worked together? (GIVING BRAINLIEST!!!)There were so many advancements in transportation and communication in the 19th century. Pick 3 for each category and describe them below how does communication take place in an organisation 15marks What happens to the sugars that a plant manufactures during the process of photosynthesis?A. They are digested by the plantB. They get absorbed in the soilC. They are used as sources of energy for cell functions.D. They are converted to oxygen and stored by the plant. A silk worm grows twice asd long as it was the day before .If the worm measures v40 mm on the 10 th day, on which day was it 2.5 mm long A fair spinner has 10 equal sections: 4 red, 3 blue and 3 green.It is spun twice.What is the probability of getting the same colour twice?