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Gnoma [55]
3 years ago
13

In 1808, John Dalton proposed a series of statements regarding the atom that became known as Dalton's postulates or Dalton's ato

mic theory. Since Dalton's original proposal, some of the statements have been updated or changed due to new discoveries. Which of the statements was not a part of Dalton's original atomic theory? Matter is comprised of small particles called atoms. All four statements are part of Dalton's original atomic theory. Different elements have atoms of different masses and properties. Atoms of the same element have the same size, mass, and structure. Atoms cannot be created or destroyed in a chemical reaction.
Chemistry
1 answer:
Oduvanchick [21]3 years ago
6 0

Answer:

The all 4 the given statements are part of Dalton's atomic theory.

Explanation:

Dalton's postulates or Dalton's atomic theory:

  • Matter is made up of small particles termed as atom.
  • Atoms are indivisible particle.
  • Atoms of different element have different masses and properties.
  • Atoms of the same element have the identical size, mass, and structure.
  • During chemical reaction, rearrangement of atoms takes place.
  • Atoms of different different combines together to form new compounds in simple whole number ratio.
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Answer:

Number of moles = 2.89 mol

Explanation:

Given data:

Number of moles of sugar  = ?

Mass of sugar = 990 g

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of C₁₂H₂₂O₁₁:

12× 12 + 22×1.008 + 16×11 = 342.2 g/mol

Number of moles = 990 g / 342.2 g/mol

Number of moles = 2.89 mol

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3 years ago
What is made when salt is dissolved in water?
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7 0
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Explanation:

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3 years ago
A chemistry teacher is able to grade chemistry labs at a rate of 5 labs for every 3 minutes. They need to grade 165 labs how man
PIT_PIT [208]

Answer:

1.65hr

Explanation:

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Number of labs  = 5 labs

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Unknown:

Time taken in hours to grade 165 labs  = ?

Solution:

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  Insert the parameters and solve;

   Rate  = \frac{5}{3}   = 1.67labs/min

Now;

   Time to grade 165 labs  = \frac{number of labs}{rate}  

   Time to grade 165 labs  = \frac{165}{1.67}   = 98.8min

  Since;

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               98.8min  = \frac{98.8}{60}   = 1.65hr

3 0
3 years ago
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Answer:

C. An upward force is created

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Hope this helps!

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