Lee and Celia are lab partners. While Celia pours a chemical into a graduated cylinder, some of the chemical splashes onto her arm. what should they do next? A. Lee should continue working with Celia after helping wipe off her arm. B. Lee should tell the teacher what happened to Celia when he leaves the lab. C. Lee should tell the teacher while Celia washes her arm with soap and water. D. Lee should have Celia stand in the safety shower while another student tells the teacher.
Answers
Related Questions
Chlorine melts at 172 k what is chlorines melting point in C
Prehistory can be described as _____.what happened last yearwhat happened millions of years agothe time prior to the use of written records
Name two metals that do not always lose the same number of electrons
If 2.0 mL of 6.0M HCl is used to make a 500.0-mL aqueous solution, what is the molarity?
Answers
Answer:
Explanation:
cience
Chemistry
Q&A Library
The following mechanism has been proposed for the gas-phase reaction of chloroform (CHCl3) and chlorine.Cl2 ⇌ 2Cl (fast, reversible) Cl + CHCl3 → HCl + CCl3 (slow) Cl + CCl3 → CCl4 (fast) What rate law does this mechanism predict?A)kG) [CHCl3]1/2M) [CCl3]2B) [Cl2]H) [CCl3]1/2N) [HCl]2C) [Cl]I) [HCl]1/2O) [Cl2]2D) [CHCl3]J) [Cl2]1/2P) [Cl]2E) [CCl3]K) [Cl]1/2 F) [HCl]L) [CHCl3]2
The following mechanism has been proposed for the gas-phase reaction of chloroform (CHCl3) and chlorine.Cl2 ⇌ 2Cl (fast, reversible) Cl + CHCl3 → HCl + CCl3 (slow) Cl + CCl3 → CCl4 (fast) What rate law does this mechanism predict?A)kG) [CHCl3]1/2M) [CCl3]2B) [Cl2]H) [CCl3]1/2N) [HCl]2C) [Cl]I) [HCl]1/2O) [Cl2]2D) [CHCl3]J) [Cl2]1/2P) [Cl]2E) [CCl3]K) [Cl]1/2 F) [HCl]L) [CHCl3]2
Question
Asked Oct 30, 2019
2468 views
The following mechanism has been proposed for the gas-phase reaction of chloroform (CHCl3) and chlorine.
Cl2 ⇌ 2Cl (fast, reversible)
Cl + CHCl3 → HCl + CCl3 (slow)
Cl + CCl3 → CCl4 (fast)
What rate law does this mechanism predict?
A)k G) [CHCl3]1/2 M) [CCl3]2
B) [Cl2] H) [CCl3]1/2 N) [HCl]2
C) [Cl] I) [HCl]1/2 O) [Cl2]2
D) [CHCl3] J) [Cl2]1/2 P) [Cl]2
E) [CCl3] K) [Cl]1/2
F) [HCl] L) [CHCl3]2
check_circle
Expert Answer
Step 1
The three step mechanism of the given reaction is,
CL2 dissociate to give chorine a fast and reverse reaction.
React with CHCL3 to give HCL and CCL3 a slow reaction
React with CL to give CCL4.
Step 2
Add equation (1), (2), and (3) to get the overall reaction.
The overall reaction is expressed as,
CL2 dissociate to give chorine a fast and reverse reaction.
React with CHCL3 to give HCL and CCL3 a slow reaction
React with CL to give CCL4.
Step 3
The chlorine atom produced in equation (1) is consumed in equation (3) and CCl3 a molecule is produced in equation (2) is consumed in equation (3).
CL react with CHCL3 to give a reversible reaction of HCL and CCL4.
Yellow
Green
Blue
Answers
Answer:
Red
Explanation:
Red is diffracted the most due to its long wavelength. Compared to violet which is the shortest and is diffracted the least.
Answers
((6 x 0.25)/ load) x 10 loads = 15.00 total cost required for laundry
(6.00 / 60 min) x (75 min/shift) = 7.50 cost / shift
15.00 / (7.50 / shift) = 2 loads of laundry
Hope this answers the question.
Each shift worked can pay for 3.75 loads of laundry if each load costs 16 quarters.
Further Explanation
This problem can be solved using simple dimensional analysis. The steps are:
- Sort the given. Identify the conversion factors or equalities that may be used. Identify what is required.
- Set up the dimensional analysis ensuring that units cancel out until only the desired unit is left. The equalities in the problem may be used as conversion factors.
STEP 1: Sort first the given in the problem to identify possible conversion factors to be used in the dimensional analysis.
The following equalities are given in the problem:
- 1 shift = 75 minutes
- 12 dollars = 1 hour
- 1 load = 16 quarters
- 1 dollar = 4 quarters
STEP 2: From these equalities, the following dimensional analysis can be set up:
Therefore, one shift can pay for 3.75 loads of laundry.
LEARN MORE
- Learn more about Unit Conversion brainly.com/question/1594497
- Learn more about Dimensional Analysis brainly.com/question/8013893
Keywords: dimensional analysis, problem solving
H3O+
Cl-
Cs+
OH-
Answers
So the ions making up the salt: Cl- and Cs+
Answer:
The answers are C and D
Explanation:
B.) negative enthalpy change and negative entropy change
C.) positive enthalpy change and negative entropy change
D.) negative enthalpy change and positive entropy change
Answers
Answer: B.) negative enthalpy change and negative entropy change
Explanation:
According to Gibb's equation:
= Gibbs free energy
= enthalpy change
= entropy change
T = temperature in Kelvin
= +ve, reaction is non spontaneous
= -ve, reaction is spontaneous
= 0, reaction is in equilibrium
Thus when = -ve
= -ve
only at low temperature
Reaction is spontaneous only if temperature is low.
since the formula G=H-TS when a reaction is spontaneous then G must be negative, and if values of t are low then the only time it is guaranteed to be a negative G value is if H is positive and S is negative
Answers
Answer:
1.6 atm
Explanation:
We are given that total pressure of mixture of two gases=5.7 atm
Partial pressure of one gas=4.1 atm
We have to find the partial pressure of other branch.
We know that Dalton;s law of partial pressure
It states that pressure exerted by mixture of gases is equal to sum of partial pressure exerted by gases in mixture.
Let x bet the pressure exert by other gas
Apply this law
Total pressure=4.1+x
Hence, the partial pressure of other gas=1.6 atm.