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Margarita [4]
3 years ago
8

Which of the following parts of Dalton’s atomic theory was incorrect? Elements cannot turn into different elements in chemical r

eactions. Elements can combine in different ratios in chemical reactions.
All matter is made of atoms that are different from one another.
Atoms cannot be subdivided into smaller particles.
Chemistry
1 answer:
Rom4ik [11]3 years ago
3 0
Atoms cannot be subdivided into smaller particles - incorrect as you can subdivide atoms into protons, neutrons and electrons
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Explanation:

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How are acids and bases similar and different
const2013 [10]

Answer & Explanation:

<u>Similarities:</u>

  • Both acids and bases are electrolytes which means that they're good conductors of electricity.
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<u>Difference:</u>

  • Acids release hydrogen ions (H⁺) whereas, bases release hydroxide ions (OH⁻).
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Mr. Wells told his students that the Water cycle DOES have a clear beginning and a clear end. Mrs. Meador disagrees with him and
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3 years ago
An unknown concentration of sodium thiosulfate, Na2S2O3, is used to titrate a standardized solution of KIO3 with excess KI prese
Maru [420]

Answer: The molarity of Na_2S_2O_3 is 0.108 M

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KIO_3+5KI+3H_2SO_4\rightarrow 3K_2SO_4+3H_2O+3I_2

2Na_2S_2O_3+I_2\rightarrow Na_2S_4O_6+2NaI

To calculate the number of moles for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}    

\text{Moles of }KIO_3=\frac{0.0131mol/L\times 21.55}{1000}=2.8\times 10^{-4}mol

1 mole of KIO_3  produces = 3 moles of   I_2

2.8\times 10^{-4} moles of KIO_3 produces = \frac{3}{1}\times 2.8\times 10^{-4}=8.4\times 10^{-4} moles of I_2  

Now 1 mole of I_2 uses = 2 moles of Na_2S_2O_3

8.4\times 10^{-4} moles of I_2 uses =  \frac{2}{1}\times 8.4\times 10^{-4}=1.69\times 10^{-3}  moles of Na_2S_2O_3

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution in L}}=\frac{1.69\times 10^{-3}\times 1000}{15.65}=0.108M

The molarity of Na_2S_2O_3 is 0.108 M  

6 0
3 years ago
Which of the following words means "the thing from which something else comes"?
swat32

Answer:

b. source

Explanation:

The source is where something comes from. i.e. The source of sunlight is the sun.

7 0
4 years ago
Read 2 more answers
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