according to john dalton’s observations, when elements combine in a compound, a. the ratio of their masses is always the same. b
2 answers:
According to John Dalton’s observations, when elements combine in a compound,.
Further explanation:
An element has an atom as the smallest possible particle that it can have. It is also known as the building unit of matter. Atom has a central part called the atomic nucleus.
Postulates of John Dalton’s atomic theory:
1. There are indivisible particles inside every matter. Such particles are called atoms.
2. Atoms are the particles that can neither be produced nor be destroyed.
3. There occurs similarity in the shape and size of atoms of the same element but they are different from the elements of the other elements.
4. Atom is the smallest entity that is involved in the chemical reaction.
5. Atoms of different elements can form compounds after combination with each other. The ratio of combining elements remains fixed, simple and is a whole number.
6. The atoms of the same element have the tendency to form two or more compounds by combining in more than one ratio.
Advantages:
1. The laws of chemical combination are completely explained by this theory.
2. This theory can distinguish between atoms and molecules.
Failures:
1. This theory cannot explain the subdivision of atoms into subatomic particles.
2. Isotopes were nowhere discussed in this theory. These are the atoms of the same element having same atomic number but different mass numbers. Moreover, it did not explain the existence of isobars (atoms of different elements with the same mass number but different atomic numbers).
3. This theory failed to explain the presence of allotropes.
4. The complex organic molecules were not included in this theory.
According to Dalton’s atomic theory, elements combine with each other to form compounds in the same ratio of their masses. Therefore option a is correct.
Learn more:
1. Basis of investigation for the scientists: brainly.com/question/158048
2. Bohr’s model of the atom: brainly.com/question/2965079
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Structure of the atom
Keywords: atom, protons, electrons, neutrons, elements, compounds, subatomic particles, atomic number, mass number, isotope, isobars, Dalton’s atomic theory.
You might be interested in
Answer:
Explanation:
Hello there!
In this case, since this is a problem in which the pressure of the gas remains constant, we can use the Charles' law as a directly proportional relationship between temperature (in Kelvins) and volume given by:
Thus, solving for the final volume as the temperature is decreased to -80.00 °C, we obtain:
Best regards!
The first fact you should know to solve a stoichiometric problem like this one is that, there are 6.02 x 10^23 particles (atoms or molecules) in 1 mole of a substance.
Now, to know the equivalence factor, it is important to know a technique which cancels like units when they are placed diagonally. Hence, to find the moles Mg from atoms, the equivalence factor must have a numerator with units of moles and a denominator with units of atoms. In this case, atoms would be cancelled, leaving the moles.
Now, to know the equivalence factor, it is important to know a technique which cancels like units when they are placed diagonally. Hence, to find the moles Mg from atoms, the equivalence factor must have a numerator with units of moles and a denominator with units of atoms. In this case, atoms would be cancelled, leaving the moles.
Answer:
0.2598 M
Explanation:
Molarity is mol/L, so we have to convert the grams to moles and the mL to L. To convert between grams and moles you need the molar mass of the compound, which is 36.46g/mol.
Round to the lowest number of significant figures = 0.2598 M