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4 years ago

What did Dalton’s atomic theory teach

Chemistry

2 answers:

sweet-ann [11.9K]4 years ago

6 0

Answer:

All matter is composed of atoms.

Atoms are not destructible.

Compounds formation occur by the combination of one or different types of atoms

In the chemical reactions, atoms are rearranged.

The atom of the same elements are similar in size and properties and the Atoms of the different elements are different in size and properties.

Explanation:

John Dalton has developed the Dalton atomic theory.

Dalton atomic theory was the first to explain that all matters composed of atoms and its properties, the atom as the smallest particle which cannot be destroyed and damaged.

This theory was based on the law of conservation of mass and law of constant composition.

His theory was accepted by many scientists.

Aleks04 [339]4 years ago

5 0

Answer:

the smallest unit of matter is the atom

Explanation:

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What is metallic conductivity ?

melamori03 [73]

Explanation:

metallic conduction:the movement of electrons through a metal, with no changes in the metal and no movement of the metal atoms.

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6 0

2 years ago

What amount of acid is esterified if a mixture consist initially of 1.0mole of ethanoic acid,1.0mole of ethanol and 1.0mole of w

ale4655 [162]

Answer:

0.54 mole

Explanation:

CH3COOH CH3CH2OH CH3COOCH2CH3 H2O

Initial concentration 1.0 mole 1.0 mole 0 mole 1.0mol

Change - x - x + x + x

Equilibrium (1.0 - x) (1.0 - x) x (1.0 + x)

K = [CH3COOCH2CH3]*[H2O]/[CH3COOH]*[CH3CH2OH]

x*(1.0+x)/(1.0-x)(1.0-x) = 4.0

x+x²=4*(1-x)²

x+x² = 4(1² - 2x + x²)

x + x² = 4 - 8x + 4x²

4 - 8x + 4x²- x² - x= 0

3x² - 9x + 4 = 0

x=2.5 , x=0.54

2.5 mole of acid cannot be esterified, because there is only 1.0 mole of acid,

so answer is 0.54 mole.

3 0

4 years ago

What is the percent yield for the reaction below when

kumpel [21]

Answer:

Percent yield of reaction is 150%.

Explanation:

Given data:

Percent yield = ?

Actual yield of SO₃ = 586.0 g

Mass of SO₂ = 705.0 g

Mass of O₂ = 80.0 g

Solution:

Chemical equation:

2SO₂ + O₂ → 2SO₃

Number of moles of SO₂:

Number of moles = mass/ molar mass

Number of moles = 586.0 g/ 64.1 g/mol

Number of moles = 9.1 mol

Number of moles of O₂:

Number of moles = mass/ molar mass

Number of moles = 80.0 g/ 32g/mol

Number of moles = 2.5 mol

Now we will compare the mole of SO₃ with O₂ and SO₂.

SO₂ : SO₃

2 : 2

9.1 : 9.1

O₂ : SO₃

1 : 2

2.5 : 2×2.5 = 5

The number of moles of SO₃ produced by oxygen are less it will limiting reactant.

Theoretical yield of SO₃:

Mass = number of moles × molar mass

Mass = 5 mol × 80.1 g/mol

Mass = 400.5 g

Percent yield of reaction:

Percent yield = actual yield / theoretical yield × 100

Percent yield = 586.0 g/ 400.5 g× 100

Percent yield = 1.5× 100

Percent yield = 150%

8 0

3 years ago

This graph represents a population of molecules in a gas versus the distribution of the average velocity(speed) of its molecules

pshichka [43]

Answer:

Part A

Given that the graph is symmetrical and bell shaped, the average kinetic energy is given by the midline of graph, which corresponds to the common speed of the highest number of the population

Part B

The formula for the average kinetic energy, K.E. = (3/2)·(R/NA)·T

Therefore, the part of the graph that indicates the temperature of the sample is the average kinetic energy. K.E.

Part C

At a lower temperature, the heat is less evenly distributed and we have the distribution T2 higher than T1

Please see the attached graph created with MS Visio

Explanation:

3 0

3 years ago

HELP THIS IS FOR CHEM!! Which of the following are contact forces? Choose three.

astraxan [27]

Answer:

Tension, friction, and normal

Explanation:

7 0

3 years ago