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3 years ago

What did Rutherford's gold-foil experiment help him conclude?

Chemistry

2 answers:

Svetach [21]3 years ago

8 0

C. mass is protons and neutrons. Both are in the nucleus

GREYUIT [131]3 years ago

8 0

Answer:

That experiment led not only him but scientists in general to conclude and to prove that the atom's nucleous is not solid, proving Thomson's Plum Pudding model wrong and contradicting that previous hypothesis since the beam of positively charged particles pierced and ran through the foil, thus the volume of the atom is mostly unoccupied, setting up the fundamentals of what until these days is the concept of an atom. The most suitable answer would be then C.

Explanation:

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Given the following balanced equation, determine the rate of reaction with respect to [SO3]. If the rate of O2 loss is 3.56 x 10

Olenka [21]

Answer:

7.12 × 10⁻³ M/s

Explanation:

Step 1: Write the balanced reaction

2 SO₂ + O₂ ⇒ 2 SO₃

Step 2: Establish the appropriate molar ratio

According to the balanced equation, the molar ratio of O₂ to SO₃ is 1:2.

Step 3: Calculate the rate of formation of SO₃

The rate of loss of O₂ is 3.56 × 10⁻³ mol O₂/L.s. The rate of formation of SO₃ is:

3.56 × 10⁻³ mol O₂/L.s. × 2 mol SO₃/1 mol O₂ = 7.12 × 10⁻³ mol SO₃/L.s

7 0

3 years ago

What are the concentrations of A , A, B , B, and C C at equilibrium if, at the beginning of the reaction, their concentrations a

Elenna [48]

The question is incomplete, here is the complete question:

A reaction

$A+B\rightleftharpoons C$

has a standard free-energy change of -4.88 kJ/mol at 25°C

What are the concentrations of A, B, and C at equilibrium if at the beginning of the reaction their concentrations are 0.30 M, 0.40 M and 0 M respectively?

Answer: The equilibrium concentrations of A, B and C are 0.117 M, 0.217 M, 0.183 M respectively.

Explanation:

Relation between standard Gibbs free energy and equilibrium constant follows:

$\Delta G^o=-RT\ln K_c$

where,

$\Delta G^o$ = Standard Gibbs free energy = -4.88 kJ/mol = -4880 J/mol (Conversion factor: 1 kJ = 1000 J)

R = Gas constant = $8.314J/K mol$

T = temperature = $25^oC=[273+25]K=298K$

$K_c$ = equilibrium constant of the reaction

Putting values in above equation, we get:

$-4880J/mol=-(8.3145J/Kmol)\times 298K\times \ln K_c\\\\K_c=7.17$

We are given:

Initial concentration of A = 0.30 M

Initial concentration of B = 0.40 M

Initial concentration of C = 0 M

The chemical reaction follows:

$A+B\rightleftharpoons C$

Initial: 0.30 0.40 0

At eqllm: 0.30-x 0.40-x x

The expression of equilibrium constant for the above reaction follows:

$K_c=\frac{[C]}{[A][B]}$

We are given:

$K_c=7.17$

Putting values in above equation, we get:

$7.17=\frac{x}{(0.30-x)\times (0.40-x)}\\\\x=0.183,0.657$

Neglecting the value of x = 0.657, because change cannot be greater than the initial concentration

So, equilibrium concentration of A = $(0.30-x)=(0.30-0.183)=0.117M$

Equilibrium concentration of B = $(0.40-x)=(0.40-0.183)=0.217M$

Equilibrium concentration of C = $x=0.183M$

Hence, the equilibrium concentrations of A, B and C are 0.117 M, 0.217 M, 0.183 M respectively.

5 0

3 years ago

How is mass calculated given density and volume? (1 point) Question 8 options: 1) Volume divided by volume 2) Sum of volume and

laila [671]

Answer:

3) Density multiplied by volume

Explanation:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

So by rearranging this formula mass can be determine.

d = m/v

m = d×/v

Unit of mass when volume in mL and ddensity is g/mL

m = g/mL×mL

m = g

Example:

density = 5g/mL

volume = 3 mL

mass = ?

m = d×v

m = 5g/mL ×3 mL

m = 15 g

8 0

3 years ago

Read 2 more answers

If a proton is added to an atom of carbon, what would be the result?

Nutka1998 [239]

I think this is the answer, carbon equals atomic number six which means it's the sixth element on the periodic table and then it has six protons. So the nucleus will have one, two, three, four, five, six protons which are all positively charged. ... So, if you add a proton to a carbon nucleus, you'll get nitrogen. Hope it helped!

5 0

3 years ago

Hybrid cars can switch back and forth between gasoline power and electric

Savatey [412]

B. People can use additional conservation tactics, like sometimes bicycling.

Explanation:

The use of bicycle to cover short distances would be good change in change in behavior that would enhance the conservational tactics in using fossil fuels.

Most hybrid cars still use gasoline. Although they have dualized energy sources.

Driving hybrid cars more often will not curb the conservation drive for fossil fuel. It will increase more demand for it.
Driving separate hybrid cars will not solve conservation issue of fossil fuels.
Driving the car more is no efficient way to curb the reliance on fossil fuels.

The use of bicycles to cover maybe short distances will be a good approach to conserving more fossil fuels.

learn more:

Non-renewable resources brainly.com/question/3386515

#learnwithBrainly

7 0

3 years ago