CHEMISTRY HIGH SCHOOL

What was John Dalton's contribution to the development of the atomic theory?A
Dalton recognized that tiny atoms combined to form complex structures.

B
Dalton recognized the presence of electrons around a nucleus.

C
Dalton recognized the presence of protons in the nucleus.

Answers

Answer 1
Answer:

Answer:

A. Dalton recognized that tiny atoms combined to form complex structures.

Related Questions

Will give brainlestWhat is being shown in the above Figure? A. Camshaft gear backlash is being checked B. Camshaft is being aligned C. Engine is being timed D. Camshaft is being removed
the reaction below shows how silver chloride can be synthesized. agno3 nacl nano3 agcl how many moles of silver chloride are produced from 15.0 mol of silver nitrate?
If you use 19 mL of 0.100 M KMnO4, how many moles have you used? The answer has to be in four decimal places (do not forget the leading zero). No scientific notation.How much 5.0 M H2SO4 needs to be used to make 152 mL of 1.0 M? Round answer to nearest whole number and omit units.
6. when multiplying and dividing measured quantities, the number of significant figures in the result should be equal to the number significant figures in___. a) all of the measurements b) at least and most precise measurements c) the most precise measurement d) the least precise measurement
What is the charge on an electron?

When was Carbon discovered? (The element from the periodic table)

Answers

Carbon was discovered in 3750 BC

Who placed all the elements in the right place according to their properties

Answers

Dmitri Mendeleev Was the name of the guy you where looking for

Each sheet of metal on a roof is parallel to the rest of the sheets of metal. If the first sheet of metal is perpendicular to the top line of the roof, what can you conclude about the rest of sheets of metal? Justify your answer.a. The sheets of metal are all perpendicular to the top line of the roof by the Alternate Interior Angles Theorem.
b. The sheets of metal are all perpendicular to the top line of the roof by the Transitive Property of Parallel Lines.
c. The sheets of metal are all perpendicular to the top line of the roof by the Converse of the Same-Side Interior Angles Theorem.

Answers

B.

Because all of the lines are parallel, and the top line is perpendicular to them, all of the lines are perpendicular to the top line due to the transitive property of parallel lines.

Answer:

b. The sheets of metal are all perpendicular to the top line of the roof by the Transitive Property of Parallel Lines.

the wind pushes a paper cup along the sand at a beach. the cup has a mass of 0.025kg and accelerates at a rate of 5m/s2 how much force is the wind exerting on the cup

Answers

Mass of the paper cup = 0.025 kg
Rate of acceleration of the cup due to force of wind = 5 m/s^2
We already know that
Force = Mass * Acceleration
So Force exerted by the wind on the cup = 0.025 * 5 kg m/s^2
                                                                   = 0.125 Newton
So the force exerted by the wind on the paper cup is 0.125 newton.I hope this is the answer thatyou wanted and the process of doing such problems is clear to you.
                                                                   

Which of the following is a characteristic of proteins? A)           Some may enhance the rate of specific chemical reactions.
                B)            They may form either long, thin fibrous molecules or compact, rounded globular molecules.
                C)            They store genetic information for cellular metabolism.
                D)           They form through hydrolysis reactions.
                E)            a and b

Answers

E. Both A and B.

Enzymes, which can catalyze chemical reactions, are a type of protein. Moreover, proteins can either be fibrous and insoluble in water like actin and myacin, or globular and soluble like hemoglobin. DNA, which stores the genetic information, is not made of proteins. Lastly, proteins are made through the translation of mRNA at the ribosomes.

I hope this helps!

Final answer:

Correct answer is Option E, which includes options A and B. Proteins can enhance specific chemical reactions as enzymes and can form diverse structures. Proteins do not store genetic information and do not form through hydrolysis reactions.

Explanation:

The correct answer to this question is Option E, which are options A and B. Proteins do indeed have the ability to enhance the rate of specific chemical reactions. These are known as enzymes. Another characteristic of proteins is their diverse structure, as mentioned in option B. They can form long, thin fibrous molecules like collagen or compact, rounded globular molecules like hemoglobin. However, they do not store genetic information (that is the function of DNA and RNA), nor do they form via hydrolysis reactions. Proteins are synthesized through a process called dehydration synthesis, not hydrolysis.

Learn more about Proteins here:

brainly.com/question/30258984

#SPJ11

A 220.0-mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310. K. What is the new pressure of the sample?(1) 5l.1 kPa(2) 216 kPa(3) 243 kPa(4) 274 kPa

Answers

4. This problem is really simple if you realize that you can use the combined gas law:

P1V1/T1 = P2V2/T2

Therefore, just substitute in and solve:

(105 kPa)(220.0 mL)/(275K) = ?kPa(95.0 mL)/(310 K)
Solve for ?
Answer is 274. kPa

The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.

Option 4)274 kPa is the correct answer.

What is Combined gas law?

Combinedgas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

  • Initial volume V₁ = 220.0mL = 0.22L
  • Initial pressure P₁ = 105kPa = 1.03627atm
  • Initial temperature T₁ = 275K
  • Final volume V₂ = 95.0mL = 0.095L
  • Final temperature T₂ = 310K
  • Final pressure P₂ = ?

To calculate the new temperature of the gas, we substitute our given values into the equation above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

P₂ = (P₁V₁T₂) / V₂T₁

P₂ = ( 1.03627atm × 0.22L × 310K ) / ( 0.095L × 275K )

P₂ = 70.673614LatmK / 26.125LK

P₂ = 2.705atm

P₂ = (2.705 × 101.325)kPa

P₂ = 274 kPa

The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.

Option 4)274 kPa is the correct answer.

Learn more about the combined gaslaw here: brainly.com/question/25944795

#SPJ5
Other Questions
A 25.5 liter balloon holding 3.5 moles of carbon dioxide leaks. If we are able to determine that 1.9 moles of carbon dioxide escaped before the container could be sealed, what is the new volume of the container?
What is the very small center core of an atom is called?
The oxidation # (charge) of an element called "lindenium "Ld is + 1 and the oxidation # (charge) of an element called "mendezine symbol "Mz, is -2. What is the chemical formula for the compound called lindenium mendezide?
A 8.60 L tank of nitrogen gas at a pressure of 455 mmHg is connected to an empty tank with a volume of 5.35 L. What is the final pressure in the system after the valve connecting the two tanks is opened? Assume that the temperature is constant.