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

Answers

Answer 1

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


Related Questions

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


1. If a 250 kg rock is sitting on the ledge of Ls cliff 295 meters high, then what is the
potential energy of the rock?

Answers

Answer:

Explanation:

P.E=M*G*H

P.E=250*10*295

P.E=737,500J

Guys help me





Please

Answers

Answer:

8.38×10raise to power 23

Explanation:

mass of sugar=density ×volume

=. 1.59g/ml×25ml=39.75

no. of miles= given mass/ molar mass

= 39.75/342.3g / mole

1 mole of sugar =C12 H22 O11

contains

12× 6.023 × 10 ∆23=72.28× 10∆ 23 ×6.023×10²³

= 8.38× 10²³

Fill in the blank,
The law of conservation of mass
says substances can neither be
nor

Answers

Answer:

created or destroyed

Explanation:

The law of conservation of mass tells us that during a chemical reaction, matter is neither created or destroyed; it can change from one form to another but there will be no gain or loss of mass.

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.

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:

Does anybody know how to do this if so please help !

Answers

Answer:

add x to 7 and divide by 3

Explanation:

easier formula

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?

Diamond is extremely hard and does not conduct electricity.
Which statement explains these properties?.

Answers

Answer:

C. It has no delocalised electrons and each carbon atom forms four covalent bonds with other carbon atoms.

Explanation:

Diamond is composed solely by carbon atoms. As the difference of electronegativity between atoms is 0, diamond is a fully covalent compound.The lack of electrical conductivity stems from a lack of available electrons, this means that there are no delocalised electrons.

The information in the first point discards options A and D, while the second point discards option B. Thus the answer is option C.

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

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

If 115grams of a substance reacts with 84grams of another substance, what will be the mass of the products after the reaction?

Answers

Isn’t it 115+84 so 199

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

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.

balanced the equation please Fe + O2 → Fe2O3

Answers

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

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

Explanation:

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.

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 element is found in water?

1. Carbohydrate

2. Carbon

3. oxygen

Answers

Explanation:

3. the element is oxygen

oxygen is in water! ;)

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

Answers

The answer is A “ mutations”

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.

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?

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.”

Can anyone solve this chemical reaction?

Answers

Answer:

1) BaCl2 + Na2O = BaO + 2NaCl

2) C4H8 + 6O2 = 4CO2 + 4H2O

3) MgCO3 + 2K = K2CO3 + Mg

4) N2 + 3F2 = 2NF3

Pls help me with this problem

Answers

Answer:

2 and 5 would be my answers

Explanation:

whether carboxylic acids are electrolytes​

Answers

Answer:

??

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:

Which of the following can be used as lubricant

Answers

Answer:

Explanation:

B is the ans

pls mark BRAINLIEST

Letter b is the answer b can be used as a lubricant

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

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.

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:

^

Other Questions
Read the sentences about some of Erics teachers. Then choose the word that best describes each teacher.joven entusiasta optimistaPart ALa profesora de espaol tiene una actitud positiva. The exponential function h, whose graph is given below, can be written as h(x) = ab^xComplete the equation for h(x). From 1937 to 1939, US President Franklin D. Roosevelt was a vocal opponent of the Japanese and Nazi attacks against allied nations. Despite his opponents, FDR insisted that the United States will stay neutral in the war, which undermined his role with his allies. The three monotheistic religions that first began in the same area are Islam, Christianity, and Judaism. Did they begin in which modern-day country?A. North AfricaB. Southeast AsiaC. West AfricaD. Southwest Asia In the phrase, "and the chin was sustained by the same principle," to whatdoes "principle" refer?A. PrideB. HeightC. PreternaturalD. PillarE. Inflation Do you consider yourself at risk for contracting and STI? Why or why not? Ahmad went on a bicycle tour. In the first two hours , he averaged 12 km/h; but in the next three hours he averaged 8 km/h;. A)Calculate the total distance covered b) , calculate his average speed for the whole journey 13. What occurs in the month of September? a Summer solstice b Winter solstice c Autumnal equinox d Spring equinox Pls help bc social studies is not my best subject Give any Two reasons why many students commit to hingher education without having the required funds Please answer quick and just write explanation quick pls hurry quick for brainlessly What were the main strategies of Prithvi Narayan Shah for strengthening his army force? Ii want a brief and brief description of a bottlenose dolphin HELPP WILL GIVE BRAINLIEST Which of the following would not work as a supporting paragraph of acompare-and-contrast essay that begins with the thesis below?Thesis: If you're new to cold-water sports and don't know ifyou should buy a wet suit, a dry suit, or a trisuit, you shouldbegin by learning the characteristics of each suit. .Alien and Sedition ActsIncreased the waiting period to become a citizen of the United StatesGave the President power to arrest disloyal immigrants or order them out of the countryOutlawed false or critical speech about the U.S. government.An effect of the Alien and Sedition Acts was...a decrease in the waiting period to become a citizen.an arrest of newspaper editors for criticizing the government, First Amendment violation.a support of the law by both the Federalists and Republicans.a decrease in the number of immigrants deported from the country. PLEASE SHOW WORK AND EXPLAIN IM AM VERY CONFUSED ASAP WILL GIVE BRAINLIEST 10 MINUTES TILL ITS DUE What TWO steps do you take to solve the following equation: 5x - 3 = 12 All living things contain genetic material known as _________________ What is a nation-state? Why is Korea technically not a nation-state today? Which is an example of a personification of an abstract idea?A. Hope can help in times of trouble.B. Love wears bold and bright colors.C. Truth may not be what you think.D. Patience is something you must learn.