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ozzi
4 years ago
6

What is the difference between a molecular formula and a molecular model?

Chemistry
2 answers:
Westkost [7]4 years ago
7 0
Molecular formula tells you what elements the atoms are and how many moles and atoms are attributed to each element. Molecular model how the elements/ atoms are bonded together
icang [17]4 years ago
4 0
There really isn't a difference if you think about it
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The mass number refers to the totaol number of _____and_____which can be found int he nucleus of the atom
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The mass number refers to the total number of protons and neutrons which can be found in the nucleus of the atom.
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What are two examples of objects with low friction?
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3 years ago
A 254.5 g sample of a white solid is known to be a mixture of KNO3, BaCl2, and NaCl. When 116.5 g of this mixture is dissolved i
Margaret [11]

Answer:

Mass of KNO3 in the original mix is 146.954 g

Explanation:

mass of KNO_3 in original  254.5 mixture.

moles of BaSO_4 = \frac{mass}{Molecular\ Weight}

moles ofBaSO_4  = \frac{68.3}{233.38}

                               = 0.2926 mol of BaSO4

Therefore,

0.2926 mol of BaCl2,

mass of BaCl_2 = mol\times molecular weight

                         = 0.2926\times 208.23

                         = 60.92 g

the AgCl moles = \frac{mass}{Molecular\ Weight}

                          = \frac{199.1}{143.32}

                          = 1.3891 mol of AgCl

note that, the Cl- derive from both, BACl_2 and NaCl

so

mole of Cl- f NaCl = (1.3891) - (0.2926\times 2) = 0.8039 mol of Cl-

mol of NaCl = 0.8039 moles

mass = mol\times Molecular\ Weight  = 0.8039 \times 58 = 46.626\ g \ of \ NaCl

then

KNO3 mass = 254.5 - 60.92-46.626 = 146.954 g of KNO_3

Mass of KNO3 in the original mix is 146.954 g

8 0
3 years ago
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