1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
svet-max [94.6K]
3 years ago
13

The rate constant for this second‑order reaction is 0.670 M − 1 ⋅ s − 1 at 300 ∘ C. A ⟶ products How long, in seconds, would it

take for the concentration of A to decrease from 0.690 M to 0.360 M?
Chemistry
1 answer:
Alexus [3.1K]3 years ago
7 0

Answer:

t = 1.983 s

Explanation:

  • A → Pdts
  • - rA = K (CA)∧α = - δCA/δt

∴ α: order = 2

∴ K: rate constant = 0.670/M.s.....T = 300°C

⇒ - δCA/δt = (0.670/M.s)(CA²)

⇒ - ∫δCA/CA² = (0.670)∫δt

⇒ [ 1/CA - 1/CAo ] = 0.670*t

∴ CA = 0.360 M

∴ CAo = 0.690 M

⇒ [ 1/0.360 - 1/0.690 ] = 0.670*t

⇒ [ 1.3285/M ] = (0.670/M.s)*t

⇒ t = 1.983 s

You might be interested in
Write the balanced molecular, ionic, and net ionic equations for the reaction when a solution of lithium phosphate is mixed with
Kaylis [27]

Answer:

see explaination

Explanation:

Molecular equation;

2Li3PO4(aq) + 3CaCl2(aq) >>>> Ca3(PO4)2(s) + 6LiCl(aq)

Total ionic equation; . Includes all ions ;

6Li^+(aq) + 2PO4^-3(aq) + 3Ca^+2(aq) + 6Cl^-(aq) >>>> Ca3(PO4)2(s) + 6Li^+(aq) + 6Cl^-(aq)

Net ionic equation; remove common ions from total ionic;

2PO4^-3(aq) + 3Ca^+2(aq) >>>> Ca3(PO4)2(s)

6 0
3 years ago
state whether the following changes are physical or chemical for rancidipication fixation of water 2 tearing of paper 3 rusting
Artist 52 [7]
1. rancidification fixation of water is CHEMICAL CHANGE

2. Tearing of paper is PHYSICAL CHANGE

3. Rusting if iron is CHEMICAL CHANGE

4. Electrolysis of water is CHEMICAL CHANGE
5 0
3 years ago
N2 + 3 H2 – 2 NH3 How many moles of nitrogen (N2) are required to get 6
Iteru [2.4K]

Answer:

N2 + 3H2 → 2NH3. 14 moles a. If 6 mol of H2 are consumed, how many moles of NH3 are produced? ... a 3 mol H₂. 4. How many moles of nitrogen are needed to make 11 moles of NH3? Il mol NH₃ x Imol Na = 15.5

5 0
3 years ago
The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide. what is this distance in cen
e-lub [12.9K]
<span>pm stands for picometer and picometers are units which can be used to measure really tiny distances. One picometer is equal to 10^{-12} meters. We know that one centimeter is equal to 10^{-2} m so there are 10^2 cm per meter. We can change the distance d = 115 pm to units of centimeters. d = (115 pm) x (10^{-12}m / pm) x (10^2 cm / m) d = 115 x 10^{-10} cm = 1.15 x 10^{-8} cm The distance in centimeters is 1.15 x 10^{-8} cm</span>
7 0
3 years ago
Which statement best compares and contrasts two physical properties of matter? Density and solubility are similar because they b
mash [69]
I believe the correct answer would be that b<span>oiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid. Boiling and melting are phase changes that can happen to a substance however they differ in the process that happens.</span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • You have 3 L of a 5M solution of calcium chloride. How many L would you be able to make of a 0.5M solution?
    15·1 answer
  • Which choice can be a solid, liquid, or a gas?
    11·1 answer
  • 8. The density of an iron nail is the same as the density of an iron frying pan. Explain
    10·1 answer
  • I don’t know how to do this please help
    8·1 answer
  • 21+ Cl2 → 12+201 -
    9·1 answer
  • Define atomic mass unit?​
    13·2 answers
  • Please help me!<br> Physical change involves a change in composition.<br><br><br> True or False
    15·1 answer
  • What is the maximum number of electrons in the following energy level?<br> n = 4
    9·1 answer
  • Do the ingredients changing into a cake in the oven a chemical reaction?
    8·1 answer
  • Why are there sometimes warm days during a cold winter? (not chemistry, its actually science)
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!