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CHEM 120 Unit 4 Midterm (Jan 2021) Introduction To General, Organic, And Biological Chemistry $12.49   Add to cart
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CHEM 120 Unit 4 Midterm (Jan 2021) Introduction To General, Organic, And Biological Chemistry
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CHEM 120 Unit 4 Midterm (Jan 2021) Introduction To General, Organic, And Biological Chemistry/CHEM 120 Unit 4 Midterm (Jan 2021) Introduction To General, Organic, And Biological ChemistryCHEM 120 Unit 4 Midterm (Jan 2021) Introduction To General, Organic, And Biological ChemistryCHEM 120 Unit 4 Mid...

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  • February 24, 2022
  • 7
  • 2021/2022
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  • Questions & answers

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  • organic
  • organic
  • chem 120 unit 4 midterm jan 2021 introduction to general
  • and biological chemistrychem 120 unit 4 midterm jan 2021 introduction to general
  • and biological chemistrychem 120 unit

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1.The correct isotope symbol for the isotope containing 1 proton

and two neutrons – He

2.Which are the elements with the following electronic

configuration:

1s2 2s2 2p6 3s1 – Sodium

1s2 2s2 2p5- Fluorine

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2 – Geremanium (Ge)

3. Provide 4 examples of substances with ionic bonds

LiF - Lithium Fluoride, LiCl - Lithium Chloride, LiBr – Lithium

Bromide, LiI - Lithium Iodide, Nacl,Calcium Nitrate

5. Name the following:

N2S3 - dinitrogen trisulfide

NaCl – Sodium Choloride

P4O10- Phosphorus pentoxide

NaNO3- Sodium nitrate

Cl2O3- Dichlorine trioxide

6. A gas is enclosed in a 10.0 L tank at 350 mm Hg pressure. If the

gas is pumped into a 23.00 L vessel, what is the new pressure

10.0 L ×350 mmHg 10.0 × 350mmHg 3500 mmHg
= =
23.00 L 23.00 23



This study source was downloaded by 100000824189183 from CourseHero.com on 02-24-2022 12:20:06 GMT -06:00


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, 152.173 mmHG




7. The molarity of a solution that contains 12.5 g of KClO3 in 3.2

liter of solution is

moles of solute
Molarity = ; K- 39.10 + Cl-35.45 + O-
volume of solution

16(3)-48; KClO3= 122.55 g/mol

12.5 g ×1 mol 12.5 mol
M= = = 0.102 mol
122.5 g 122.5

0.102mol
= 0.032 M
3.2 L




8. What other compound could also be added in order to make a

buffered solution with each of the following:

H3PO4 - H2PO3

CH3COOH - CH2CO2-

H2CO3 - HCO2-

9. Balance: C2H4 + O2 → CO2 + H2O

First take a look at the equation and see how many elements there

are, in this case we have 3 different elements; Carbon, Hydrogen

and Oxygen. To balance the equation start off by balancing the




This study source was downloaded by 100000824189183 from CourseHero.com on 02-24-2022 12:20:06 GMT -06:00


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