Summarize the five points of Dalton’s atomic theory, and explain at least one change that occurred to the atomic theory because of further experimentation.Important Points:
All matter is composed of very small particles called atoms.
All atoms of a given element are identical.
Atoms cannot be created, destroyed, or subdivided.
Atoms combine with or separate from other atoms.
Atoms combine with each other.
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1) all elements are made up of atoms.
2) atoms are so small that they cannot be divided any further.
3) an atom can neither be destroyed nor be formed.
4) atoms of an element are similar, they posses same mass and same properties.
5) atoms of different elements combine in a definite ratio to form compounds.
Due to further experimentation it was concluded that atom is made up of small particles identified as proton, neutrons, and electrons. They can be further subdivided.
Another change is the presence of isotopes of atoms of different elements. Hence, atoms of the same element can also have different masses.
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Answers
Final answer:
The approximate pH of a 5x10-3 MHCl solution is 3.
Explanation:
The pH of a solution can be calculated using the formula pH = -log[H+], where [H+] represents the concentration of hydrogen ions in the solution. In this case, we have an HCl solution with a concentration of 5x10-3 M. To find the pH, we need to convert the concentration into the molarity of H+ ions. Since HCl is a strong acid, it dissociates completely in water, meaning that 1 molecule of HCl yields 1 H+ ion. Therefore, the molarity of H+ ions is also 5x10-3 M. Plugging this value into the pH formula, we get:
pH = -log(5x10-3)
pH = -(-3) = 3
Therefore, the approximate pH of the 5x10-3 M HCl solution is 3.
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The plausible reason for the change in mineral A will be the lower activation energy than the transferred energy.
The addition of energy will result in the change in the minerals if the activation energy is exceeded.
The minerals found in mining A and B have transferred the energy. The minimum amount of energy required to do the transition in the atoms in the activation energy.
The possible reason for the change in the mineral A will be the lower activation energy for the mineral A. The mineral B does not change because the activation energy of mineral B is higher as compared to mineral A.
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Answer: Mineral A changed because Molecular energy transferred is equal or greater than than its Activation energy
Mineral B didn't change because Molecular energy transferred is less than its Activation energy.
Explanation:
The molecules of Mineral A has been disturbed by the addition of energy causing a change and the entropy is increased. The Molecules of Mineral B has not been disturbed because the residual energy has not been overcome and therefore yielding no visible change
a. True
b. False
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Magma from Earth's interior oozes from the cracks at mid-ocean ridges.
true is the right one
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london dispersion
dipole dipole
hydrogen
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The molar mass of the gas that occupies the given volume is 127.4 g/mol.
The given parameters;
- mass of the gas, m = 3.3 g
- volume of the gas, V = 660 ml = 0.66l
- pressure of the gas, P = 735 mmHg
- temperature of the gas, T = 27 ⁰C = 273 + 27 = 300 K
The number of moles of the gas is calculated form ideal gas law as follows;
PV = nRT
where;
- n is the number of moles
- R is the gas constant = 62.36 L.mmHg/mol.K
The molar mass of the gas is calculated as follows;
Thus, the molar mass of the gas that occupies the given volume is 127.4 g/mol.
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