How did chemists make their proposed model of the sub atomic particles?

Answers

Answer 1

Answer:

Because they want to clarify or give solution to the particle that the other didn't know

Explanation:

Correct me if im wrong thanks


Related Questions

Two students pull a box with force of 100 N to the left and 200 N to the right.

What is the net force and direction in which the box moved?

Answers

Answer:

net force is 100 N and direction is right

Explanation:

5
Increasing the amount of current flowing through a wire strengthens
what? *
O magnetic field
O polarity
O electromagnetism
solenoid

Answers

Answer:

Increasing the current would strengthen the

electromagnetisn

Which of the following statement is wrong?
A)Leaves can make food when there is sunlight

B)Stamen will develop into a fruit

C)Stem helps in the conduction of water

D)Plants need air, water and sunlight to grow

Answers

Answer:

C) Stem helps in the conduction of water

Explanation:

It's the xylem and phloem present in the vascular bundles of stems that conduct water and minerals across the plant. Stems bear flowers and fruits in a position that facilitates the processes of pollination, fertilization, and dispersion of seeds. So, stem doesn't help in the conduction of water.

Answer:

the person above is correct

Explanation:

jjecjjeccejec hello good day?

Calculate:for each object, substitute the values you know into the gravitational potential energy equation to solve for weight. Record each object's weight in the fourth column.

Answers

Answere:No sé esto jeje lo siento no soy tonta pero simplemente no sé esto

Explanation:

What is the molar mass of H3PO4? (atomic mass: H = 1.01, P = 30.97, O = 15.99)​

Answers

Answer:

98

Explanation:

molar mass of H3PO4=(3×1)+(31)+(4×16)=3+31+64=98

mi
Which two types of energy are formed by the transformation shown in the
photo?
A. Thermal energy - electrical energy
B. Chemical energy - electromagnetic energy
MC. Thermal energy -- chemical energy
D. Chemical energy - thermal energy

Answers

Answer:

A Thermal Energy and Electrical Energy

Explanation:

First it goes thermal then it transposed to electricity

Answer:

c and A

Explanation:

Which of the following chemical formulas represents a molecule?


H2 CO2 SiO2 NH3

Answers

Answer:

H2

Explanation:

H (or hydrogen), being a halogen, as an atom, has 7 valence electrons. This means that it naturally bonds with another atom of the same isotope in order to reach the desired total of valence electrons: 8.

So... H+H = H2. EZ

Answer:

its all of them

Explanation:

i just did it lol but just incase, "Molecules are made of two or more atoms that are chemically bonded together. The atoms can be of the same element or of different elements. Therefore, H2, CO2, SiO2, and NH3 are all molecules."

Study the chemical reaction below and answer the questions that follow: 8Al + 3Fe₃O₄ → 4Al₂O₃ + 9Fe How many moles of iron would be produced if 4.0 moles of aluminum reacts with an excess of Fe₃O₄?

A. 4.0 moles
B. 4.5 moles
C. 8.0 moles
D. 9.0 moles

Answers

Answer: the answewr is A. hope this helps!

Explanation:

Write the equilibrium expressions for each of the following equilibria:
a. 2 Ba + O2 ⇌ 2 BaO
b. 2 Mg + O2 ⇌ 2MgO
c. P4 + 5 O2 ⇌ P4O10

Answers

Answer:

a.

[tex]K=\frac{[BaO]^2}{[Ba]^2[O_2]}[/tex]

b.

[tex]K=\frac{[MgO]^2}{[Mg]^2[O_2]}[/tex]

c.

[tex]K=\frac{[P_4O_{10}]^2}{[P_4][O_2]^5}[/tex]

Explanation:

Hello!

In this case, since the equilibrium expression is set up by dividing the products over the reactants and powering to the stoichiometric coefficient, we can proceed as follows:

a. 2 Ba + O2 ⇌ 2 BaO.

[tex]K=\frac{[BaO]^2}{[Ba]^2[O_2]}[/tex]

b. 2 Mg + O2 ⇌ 2MgO

[tex]K=\frac{[MgO]^2}{[Mg]^2[O_2]}[/tex]

c. P4 + 5 O2 ⇌ P4O10

[tex]K=\frac{[P_4O_{10}]^2}{[P_4][O_2]^5}[/tex]

Best regards.

What is the charge of cobalt in CoCl2?

Answers

Answer:

The oxidation number of cobalt is +2.

How many milliliters of 0.25M H2SO4 can be prepared from 57 mL of a 3.0M solution of H2SO4?

Answers

Answer:

Why ? Because 1 molecule of H2SO4 gives 2 H+ ions per molecule while only one H+ ion is required to neutralize 1 molecule of KOH. So, 1 molecule of H2SO4 can neutralize 2 molecules of KOH. Hence, we would require 525 ml of 0.03 M H2SO4 to neutralize 525 ml of 0.06 M KOH. How will we prepare 525 ml of 0.03 M H2SO4 ?

Explanation:

Now, we have 0.025 M H2SO4 and we do not know how much volume we have.

We will use the standard N1 X V1 = N2 X V2 for this calculation.

N1=0.025 M; V1=unknown; N2=0.03 M and V2=525 ml.

So V1= (0.03 X 525)/(0.025) = 630 ml.

According to the molar concentration, 684 ml of 0.25 M H₂SO₄ can be prepared from 57 mL of a 3.0 M solution of H₂SO₄.

What is molar concentration?

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.In case  of 2 solutions,it is calculated as, M₁V₁=M₂V₂ substitution gives V₁=3×57/0.25=684 ml.

Thus, 684 ml of 0.25 M H₂SO₄ can be prepared from 57 mL of a 3.0 M solution of H₂SO₄.

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Need help with the balancing one

Answers

the third option, 2,2,1,2

For a theoretical yield of 5.52 g and percent
yield of 51.7877%, calculate the actual vield
for a chemical reaction.
Answer in units of g.

Answers

Answer:

2.85868104g

Explanation:

Actual yield

Theoretical yield            x 100 = 51.7877%

So, do the inverse and you get 2.85868104g

which statement best explains why so many fossils look different from the millions of species currently living on Earth?
A. The rock that makes up the fossils has broken down over time
B. Most species that have lived on Earth are now extinct
C. The fossil record is filled with inaccuracies
D. Organisms are becoming simpler over time through evolution

Answers

Answer:

B.

Explanation:

Most species that have lived on Earth are now extinct

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A P E X

The statement that best explains why so many fossils look different from the millions of species currently living on Earth is: B. Most species that have lived on earth are now extinct.

What are fossils ?

The fossil record is evidence that life on Earth has changed over time, with new species evolving and old ones going extinct. It shows the wide range of life that existed throughout Earth's history, including many species that no longer exist today.

The diversity of fossils is primarily due to the extensive range of species that have lived and gone extinct throughout the history of life on Earth.

Although some fossils may have changed over time or contain inaccuracies, they are still crucial for understanding the evolutionary relationships among different species.

Hence, option B is correct.

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Which blocks will move under these conditions and explain

Answers

Answer:

Correct: B

Explanation:

The first block wont move because:

Σf=3-3=0N.

The second block will move because:

Σf:5-3=2N (direction to the right).

The third block will move because:

Σf=3N (direction to the right).

What happens to particles of a substance as its temperature increases?
A the average kinetic energy increases
B the average kinetic energy decreases
C the average kinetic energy stays the same
D nothing happens

Answers

Answer:

A. the average kinetic energy increases

Explanation:

temperature is a measure of the average kinetic energy of the particles in a sample of matter

What is the pH of a solution with a (H+] = 0.80 M? *Please round your answer to the appropriate number of significant figures. Your answer can be in standard notatic "e" in place of x10.*​

Answers

Answer:

The pH of a solution with a (H+] = 0.80 M is [tex]9.6 e^{-2}[/tex]

Explanation:

As we know

pH = -[log H+]

Substituting the value of H+ ion concentration in the above equation, we get -

pH = -log [0.80]

pH [tex]= -[-0.096] = 0.096 = 9.6 e^{-2}[/tex]

2. Name each of the following ionic compounds A. K2O B. Cacl2. C. Mg3N2 D. NaCIO E. KNO3​

Answers

A. Potassium oxide
B. Calcium chloride
C. Magnesium nitride
D. Sodium hypochlorite
E. Potassium nitrate

Ionic compound K₂O is potassium superoxide. CaCl₂ is calcium chloride. The compound Mg₃N₂ is magnesium nitride and NaClO is sodium hypochlorite and KNO₃ is potassium nitrate.

What are ionic compounds?

Ionic compounds are formed between metals and non-metals. They are bonded by lose of electrons from the metal to the non-metals. An ionic compound is named starting with the cation and then the anionic part is named second with the suffix "ide" , "ate" , "ite" etc.

The compounds with the general formula M₂O are called super oxides. K₂O is called potassium superoxide or dipotassium oxide.

The compound, CaCl₂ is named as calcium chloride. The subscripts in formula  are the number of each atoms in the compounds.

Similarly Mg₃N₂ is named as magnesium nitride and KNO₃ is called potassium nitrate. The compound NaClO is named as sodium hypochlorite.

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Please help!!! What is electrolysis?

Answers

Explanation:

plzz tell me the ans even i also want to know plzzzz someone say ans

Answer:

electrolysis is a procedure that uses direct electric current to achieve an otherwise non-spontaneous chemical reaction and is important in the separation of elements from naturally occurring

What is the meaning of the word neutral?

Answers

Explanation:

having no strongly marked or positive characteristics or features.

what are the chemical properties of acids​

Answers

Answer:

Acids are sour in taste. Acids react with carbonates and hydrogen carbonates to form a salt, water, and carbon dioxide gas. Extremely active metals such as Potassium (K), Calcium (Ca), Sodium (Na), etc tend to explode when combined with acids. Weak Acids like Carbonic Acid doesn't act with any metal at all.

I copied and pasted

but I hope the info helps

why is atomic radi measured using the nuclues from 2 of the same atoms

Answers

Explanation:

Atomic radii is measured using the distance between nucleus of 2 atoms rather than the distance between the nucleus and outermost shell because:

- There is no clear/sharp boundary of the orbital. This is why it is called an electron cloud.

- Also, the exact location of the electron is not known. What is known is the probability of finding the electron there.

Due to this, it is not possible to measure the atomic radii precisely. That's why the distance between the nucleus of two atoms is used.

I will mark somebody brainliest

Answers

I think it might be D

OMG PLEASEEEE HELPPPPPPPPPPP!!!!!!!!!!!

Answers

Answer:

the second one

Explanation:

THE answers is b

If it takes 38.70 cm^3 of 1.90M NaOH to neutralize 10.30cm^3 of H2SO4 in a battery. What is the concentration of the H2SO4?

Answers

Answer:

3.57 M

Explanation:

The reaction that takes place is:

2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O

First we calculate how many NaOH moles reacted, using the given concentration and volume:

38.70 cm³ = 38.70 mL1.90 M * 38.70 mL = 73.53 mmol NaOH

Then we convert NaOH moles into H₂SO₄ moles, using the stoichiometric coefficients:

73.53 mmol NaOH * [tex]\frac{1mmolH_2SO_4}{2mmolNaOH}[/tex] = 36.765 mmol H₂SO₄

Finally we calculate the concentration of H₂SO₄:

36.765 mmol H₂SO₄ / 10.30 mL = 3.57 M

Someone please help me with this I dont know if this is correct

Answers

Answer:

Yes its correct

Explanation:

Protons + Nuetrons

Answer: Go with your gut cos

Explanation:

Can someone help me with this chem question?

Answers

Answer:

Malleable

Explanation:

Answer:

C - Good thermal insulator

Explanation:

Metals are ductile, malleable, and are good electrical conductors. They are also good conductors of heat, but that doesn’t mean they make good thermal insulators.

Can someone help please I will give Brainlyiest

Answers

Answer:

See Explanation

Explanation:

moles of NH₃ = 11.9g/17.03 g/mol = 0.699 mole

moles of CN₂OH₄ = 1/2(0.699) mole =0.349 mole

Theoretical yield of CN₂OH₄ = (0.349 mole)(60 g/mole) = 20.963 grams

%Yield = Actual Yield/Theoretical Yield x 100%

= 18.5g/20.963g x 100% = 88.25%

Answer:

same process as last solution I did for you except the mole ratio isn't 1:1 here it is 2:1 so you diveide the moles of NH3 by 2 to get the urea moles

here I got 88.16% yield

Explanation:

What is the definition of an alternative acid?

Answers

alternative acids are more cost-effective and allow for flavor expression through nontraditional methods and ingredients, making for increased versatility.

1CaC2 + 2O2 ---> 1Ca+2CO2
I need the mole to mole ratio.​

Answers

Ca2009 sorry if wrong
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