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
Marta_Voda [28]
3 years ago
12

The reaction ch3-n ≡ c → ch3-c ≡ n is a first-order reaction. at 230.3°c, k = 6.29 ⋅ 10-4s-1. if [ch3 = n≡c] is 1.00 ⋅ 10-3 init

ially, [ch3 = n≡c] is ________ after 1.000 ⋅ 103 s.
Chemistry
2 answers:
Tatiana [17]3 years ago
7 0

The answer is 5.33 x 10^-4

to find the answer follow these steps:

the reaction is first order reaction

here k = 6.29 x 10^-4 s^-1

initial concentration = 1.00 x 10^-3

After time t = 1.000 x 10^3 s concentration is = ?

<span>So, - 6.29 x 10^-4 x 1.00 x 10^3 + ln (1.00 x 10^-3) = - 7.54 </span>

<span>C = e ^ - 7.54= 5.33 x 10^-4 M</span>

LekaFEV [45]3 years ago
7 0

Answer:Concentration of [CH_3=N\equiv C] after [tex]1.000\times 10^3 s is 2.38\times 10^{-8} mol/L.

Explanation:

Rate constant of the reaction = k = 6.29\times 10^{-4} s^{-1}

Initial concentration of [A_o]=1.00\times 10^{-3} mol/L

Concentration after time t= [A]

t = 1.000\times 10^3 s

log[A]=2.303\times \log[A_o]-kt

log[A]=2.303\times \log[1.00\times 10^{-3}]-6.29\times 10^{-4} s^{-1}\times 1.000\times 10^3 s

[A]=2.38\times 10^{-8} mol/L

Concentration of [CH_3=N\equiv C] after [tex]1.000\times 10^3 s is 2.38\times 10^{-8} mol/L.

You might be interested in
What is a farming example of mass?
Blizzard [7]

Explanation:

this is your answer I think it helpful for you tqq

7 0
3 years ago
What is the difference between the 3p sublevel and the 4p sublevel?<br><br> On the periodic table
statuscvo [17]
The p sublevels are named 2p, 3p, and 4p since the p sublevel appears only starting the 2nd level. By the Aufbau principle, 3p will be filled first before 4p. This is because of the energy present on the level. 

Each of the p sublevel has 3 orbitals, allowing them to contain 6 electrons as each orbital may hold two. 
6 0
3 years ago
etermine the number of valence electrons for each of the atoms. Enter each answer as a numeral. For example, if an atom has two
Sav [38]

Answer:

1. 1

2. 2

3. 6

4. 8

Explanation:

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.

1. Li is the symbol for the chemical element known as Lithium: it has 1 valence electron. The electronic configuration of lithium is 1s²2s¹

2. Mg is the symbol for the chemical element known as Magnesium: it has 2 valence electrons. The electronic configuration of magnesium is 1s²2s²2p63s²

3. O is the symbol for the chemical element known as Oxygen: it has 6 valence electrons. The electronic configuration of magnesium is 1s²2s²2p⁴.

4. Ne is the symbol for the chemical element known as Neon: it has 8 valence electrons.

7 0
3 years ago
recommend an element use to fill bottles that contain ancient paper. the element should be a gas at room temperature, should be
Eduardwww [97]

Okay so we are given these requirements:

element which can be used to stuff bottles that enclose ancient paper
must be a gas at room temperature
must be denser than helium
must not react with other elements

 

The only element that comes into my mind is:

<span>Argon</span>

6 0
3 years ago
. An aqueous solution ‘A’ turns phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour di
lara31 [8.8K]

Answer:

(iii) A has pH greater than 7 and B has pH less than 7

Explanation:

Phenolphthalein is a common indicator in acid base titrations. It turns pink in basic conditions and turns colorless in acidic conditions. Thus on addition of solution A it becomes pink so A should be basic having pH more than 7. On addition of B , it turn out to be colorless means that B is an acidic solution having pH less than 7.

8 0
3 years ago
Other questions:
  • Consider the following generic reaction for which Kp = 5.51 × 105 at 25°C:2R(g)+A(g)⇌2Z(g)What is the value of Kc for the reacti
    12·1 answer
  • An unbalanced chemical equation for the reaction of boron fluoride with lithium sulfite is shown below.
    12·1 answer
  • Scorpions belong to which group of arthropods?
    8·2 answers
  • Arrange the elements given below in the increasing order of their atomic size. Element A 1s22s22p6 
Element B 1s22s2
 Element C
    9·1 answer
  • If you are using a thermometer, you are measuring the
    11·1 answer
  • Given that Cu + 2HCI Cu2+ + 2CI- + H2(g) has an overall reduction potential of –0.34 V, what is a valid prediction about how thi
    5·2 answers
  • The Lewis structure for a chlorate ion, ClO3-, should show ____ single bond(s), ____ double bond(s), and ____ lone pair(s).
    15·2 answers
  • Chlorophyll molecules ______.
    8·1 answer
  • 25 facts about azalea flower
    14·1 answer
  • Vinegar (acetic acid) and baking soda (sodium bicarbonate) react in an endothermic reaction to produce sodium acetate, carbon di
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!