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- Points 160
- Questions 16
- Time Limit 120 Minutes
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Attempt Time Score LATEST Attempt 1 120 minutes 0 out of 160 * * Some questions not yet graded
Score for this quiz: 0 out of 160 *
Submitted Feb 22 at 7:04pm This attempt took 120 minutes.
Question 1
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table
Do the three conversions shown below, showing all work:
- 328 K =? oC
- 76 oC =? oF
- 135 oF =? K Your Answer: 1 - 328 - 273 = 55 C 2 - (76x 1.8) + 32 = 168.8 F 3 - (135 - 32) / 1.8 = 57.2 C + 273 = 330.2 K **1. 328K - 273 = 55 oC K → oC (make smaller) - 273
- 76 oC x 1.8 + 32 = 168.8 oF oC → oF (make larger) x 1.8 + 32
- 135 oF - 32 ÷ 1.8 = 57.2 + 273 = 330.2 K oF → oC →K**
Question 2
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table Classify each of the following 3 as an element , compound , solution or heterogeneous mixture and explain your answer.
- Wine
- Tomato soup
- Tin Your Answer: 1 - solution
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table Balance each of the following 3 equations by placing coefficients in front of each substance. C 2 H 6 + O 2 → CO 2 + H 2 O Al + O 2 → Al 2 O 3 Ca + H 3 PO 4 → Ca 3 (PO 4 ) 2 + H 2 Your Answer: C 2 H 6 + O 2 → CO 2 + H 2 O balanced -- > 2C 2 H 6 + 7O 2 → 4CO 2 + 6H 2 O c 4 , 4 h 12, 12 o 14, 14 Al + O 2 → Al 2 O 3 4 Al + 3O 2 → 2 Al 2 O 3 al 4, o 6, Ca + H 3 PO 4 → Ca 3 (PO 4 ) 2 + H 2 3 Ca + 2H 3 PO 4 → Ca 3 (PO 4 ) 2 + 3H 2 ca3, h 6, p 2, o 8,
2 C 2 H 6 + 7 O 2 → 4 CO 2 + 6 H 2 O
4 Al + 3 O 2 → 2 Al 2 O 3 3 Ca + 2 H 3 PO 4 →Ca 3 (PO 4 ) 2 + 3H 2
Question 5
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table Show the calculation of the volume of H 2 O gas produced by the combustion of 33. grams of ethanol by excess O 2 gas at 35oC and 1.05 atm. The combustion of ethanol (C 2 H 5 OH) takes place by the following reaction equation. C 2 H 5 OH (l) + 3 O 2 (g) → 2 CO 2 (g) + 3 H 2 O (g) Your Answer: PV=nRT. p - 1.
Question 6
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.)
A. B.
C. D.
Your Answer: B
B.
Question 8
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table Determine the hybridization and explain your answer for the S atom in H 2 S. Your Answer: sp 2 single bonds are formed in molecule. 4 surround group of electrons. The S atom in H 2 S has 4 groups of electrons around it in its Lewis structure, therefore, its hybridization would be sp^3.
Question 9
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table
For the compounds shown below, choose the strongest acid, explain why it is the strongest acid and write the formula of its conjugate base in the answer blank: NH 3 or PH 3 or AsH 3
- Strongest acid is:
- Explanation:
- Formula of conjugate base of the strongest acid: Your Answer: 1 - AsH 3 2 - has a greater atomic size 3 - AsH 2
- AsH 3
- As is the largest atom (of N, P or As) which makes the H-As bond weakest and most likely to form H+
- conjugate base of AsH 3 is AsH 2 -
UnansweredQuestion 12
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table In the titration of 0.300 grams of Al(OH) 3 in the presence of bromothymol blue indicator, the blue solution turns yellow after 26.4 mL of HCl of unknown concentration is added. Show the calculation of the molarity of the HCl solution? Your Answer: ( H Cl is the acid and Al (OH) 3 is the base) Ma x mLa / 1000 x Sa / Sb = gb / MWb
Ma x 26.4 / 1000 x 1 / 3 = 0.300 / 78. MHCl = 0.437 M
Question 13
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table The compound below is called ____________ (#s)-dichloro ____________ Your Answer: 1,2 penthane answer1: 1, answer2: cyclopentane
Question 14
Not yet graded / 10 pts
You may find the following resources helpful: Scientific Calculator (Links to an external site.) Periodic Table Equation Table The reaction shown below is a/an ___________ type reaction.
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