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Likurg_2 [28]
3 years ago
15

Which of the following statements is not part of Dalton's atomic theory? ( points)

Chemistry
1 answer:
sweet [91]3 years ago
4 0
The answer is "different atoms come together to form an element"- it is wrong because elements are made up of the same atoms.
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What is amu of 99 % H-1, .2% H-1 and .8% H-3
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The average atomic mass of your mixture is 1.03 u .

The average atomic mass of H is the weighted average of the atomic masses of its isotopes.  

We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its % abundance).  

Thus,  

0.99    × 1.01 u = 0.998 u

0.002 × 2.01 u = 0.004 u

0.008 × 3.02 u = <u>0.024 u</u>

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Answer:

1. How do metals and non-metals react with acids?

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Calculate the molarity of a solution that contains 0.250 moles of kf in 0.500 l of water
MakcuM [25]
Molarity can be defined as the number of moles of solute in 1 L of solution.

M = n/V

Where M is the molarity of the solution (M or mol/L), n is the moles of the solute (mol) and V is the volume of the solution (L).

Here, solute is KF.

n = <span>0.250 mol
</span>V = 0.500 L
M = ?

By applying the formula,
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Hence, the molarity of KF solution is 0.500 mol/L.

4 0
3 years ago
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