When are tides highest?
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How many significant digits are in the mass measurement 0.025 g? (a) 1 (B) 2 (c) 3 (d) 4 (e) none of the above
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Molarity NaOH = 0.1 M
Number of moles NaOH :
n = M * v
n = 0.1 * 0.054
n = 0.0054 moles of NaOH
Finally we calculate the number of moles of HCl in the solution from the stoichiometry of the reaction :
HCl + NaOH = NaCl + H₂O
1 mole HCl -------- 1 mole NaOH
? moles HCl ------- 0.0054 moles NaOH
moles HCl = 0.0054 * 1 /1
= 0.0054 moles of HCl
Volume of HCl = 125 mL / 1000 = 0.125 L
M ( HCl ) = n / V
M = 0.0054 / 0.125
= 0.0432 M
hope this helps!
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Answer: .1044 J/g*C°
Explanation: The equation you need to use for this problem is :
c= q/m* ΔT
We are given
T1= 27.1 C°
T2= 145 C°
M= 34.87g
1071 J absorbed heatt
So let's solve specific heat
c= 1071J/ (87grams)*(145 C°- 27.1 C°)
c= 1071J/10,257.3 g*C°
c= .1044 J/g*C°
c=specific heat
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(2) electrical energy to chemical energy
(3) chemical energy to light energy
(4) chemical energy to electrical energy
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The most accurately represented John Dalton's model of the atom is: C. a tiny, solid sphere with a predictable mass for a given element
Further explanation
The development of atomic theory starts from the first term conveyed by Greek scientists who suggested that every substance has the smallest particles so that the word atomos appears, which means it cannot be divided. So, John Dalton, a British scientist put forward the hypothesis about atoms, among others:
- 1. The elements are composed of atoms which are small particles which cannot be subdivided
- 2. Atoms that make up the same element have the same properties, mass, and size, while for different elements, the properties are also different
- 3. Compounds are composed of two or more atoms in a fixed ratio
- 4. In chemical reactions, atoms after and before a reaction cannot be destroyed, only separation and reassembly occur
Point 3 shows the relationship with The Law of Constant Composition of Proust so that further research on atoms is more developed
Dalton's hypothesis is described as a solid sphere like a very small shot put ball or a bowling ball based on Dalton's hobby in bowling
Learn more
Bohr's model of the atom
Rutherford performed the gold foil experiment
The part of an atom that is mostly empty space
Keywords: atom, Dalton, a solid sphere, The Law of Constant Composition
The statement that accurately represents John Dalton’s model of the atom is
Further Explanation:
Postulates of John Dalton’s atomic model:
1. The matter contains indivisible particles. These particles are known as atoms.
2. Atoms can neither be created nor be destroyed.
3. Atoms of the same element show similarity in their shape and mass, but they are different from the elements of the other elements.
4. Atom is the smallest unit that participates in the chemical reaction.
5. Atoms of different elements can form compounds by combining with each other in a fixed, simple and whole number ratios.
6. Atoms of the same element can form two or more compounds by combining in more than one ratio.
Advantages of John Dalton’s atomic model:
1. This theory explains the laws of chemical combination.
2. It provides a clear distinction between atoms and molecules. Atom is the fundamental particle of an element whereas the molecule is that of a compound.
Limitations of John Dalton’s atomic model:
1. It failed to explain the further division of atoms into subatomic particles.
2. It did not mention any concept of isotopes (atoms of the same element with same atomic number and different mass numbers) and isobars (atoms of different elements with same mass number but different atomic numbers).
3. This theory failed to explain the reason for the existence of allotropes.
4. This theory is not applicable to complex organic molecules.
Dalton’s atomic model is also known as the billiard ball model. He assumed atoms to be tiny solid spherical objects similar to the billiard balls. He called these atoms as indivisible particles. But they have some mass for the particular element.
So atom is a tiny solid sphere with a predictable mass for the given element.
Learn more:
1. Rate of chemical reaction: brainly.com/question/1569924
2. Bohr’s model of the atom: brainly.com/question/2965079
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Structure of the atom
Keywords: Tiny, solid, sphere, atom, John Dalton’s model, small particle, indivisible, allotropes, isobars, isotopes, complex, organic molecules, molecules, distinction, fundamental, laws of chemical combination, fixed, simple, chemical reaction.