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
Firdavs [7]
3 years ago
12

A certain reaction has the form aA → bB. At a particular temperature and [A]0 = 2.80 × 10-3 molar, data was collected of concent

ration versus time for this reaction. A plot of 1/[A]t versus time resulted in a straight line with a slope value of 3.60 × 10-2 M-1s-1. What is the concentration of A after 300 seconds?
a.2.80 × 10-3 molar
b.2.72 × 10-3 molar
c.2.60 × 10-3 molar
d.3.60 × 10-2 molar
Chemistry
1 answer:
SVETLANKA909090 [29]3 years ago
7 0
If the plot of 1/[A] versus time shows a constant slope, this means it is a second-order reaction. The equation would be:
1/[A] - 1/[A]0 = kt
1/[A] - 1/0.0028 = 0.036(300)
1/[A] = 0.00272 = 2.72 x 10^-3 M
This is equivalent to choice B.
You might be interested in
As a substance changes from a liquid to a gas, the average distance between molecules..
dimulka [17.4K]

Answer: increases

Explanation:

Matter exists in three different states, they are solids, liquids and gases. And each of them contains molecules with a certain amount of kinetic energy.

Hence, the addition of heat changes a substance from a liquid to a gas through a process called vaporization, whereby liquid molecules on changing to gases acquire a higher kinetic energy, and move more freely within the containing vessel.

Thus, the higher kinetic energy explains the increase in the average distance between molecules.

8 0
3 years ago
8. An atom has 9 protons, which element is it?​
ValentinkaMS [17]

Answer:

fluorine

Explanation:

The element fluorine has 9 protons and 9 electrons.

3 0
3 years ago
Read 2 more answers
Aqueous potassium sulfide and aqueous cobalt (II) chloride are mixed, and a double replacement reaction occurs. What is the corr
alekssr [168]
K2S (aq) + CoCl2( aq) ----->   2KCl (aq) + CoS (s)
potassium   +  cobalt                potassium chloride  + carbonyl  sulfide 
sulfide          chloride 

carbonyl sulfide :-  it is chemical compound with linear formula (OCS ) normally written as (CoS)  .it does not show its structure . its is colorless flammable gas with an unpleasant odour.
Potassium chloride :-  It is metal halide salt composed of potassium and chlorine. it is odorless and has white or colorless crystal appearance <span />
7 0
3 years ago
Calculate the molarity of 13.1 g of NaCl in 727 mL of solution
valentina_108 [34]

Answer:

The molarity of the solution is 0,31 M

Explanation:

We calculate the weight of 1 mol of NaCl from the atomic weights of each element of the periodic table. Then, we calculate the molarity, which is a concentration measure that indicates the moles of solute (in this case NaCl) in 1000ml of solution (1 liter)

Weight 1 mol NaCl= Weight Na + Weight Cl= 23 g + 35, 5 g= 58, 5 g

58, 5 g-----1 mol NaCl

13,1 g ---------x= (13,1 g x 1 mol NaCl)/58, 5 g= 0, 224 mol NaCl

727 ml solution------ 0, 224 mol NaCl

1000ml solution------x= (1000ml solutionx0, 224 mol NaCl)/727 ml solution

x=0,308 mol NaCl---> <em>The solution is 0,31 molar (0,31 M)</em>

5 0
3 years ago
How is freeze dried ice cream made
ollegr [7]
Freeze drying<span> (or lyophilization) removes water from the ice cream by lowering the </span>air pressure<span> to a point where ice sublimates from a </span>solid<span> to a </span>gas<span>. The ice cream is placed in a </span>vacuum chamber<span> and frozen until the water </span>crystallizes<span>. The air pressure is lowered, creating a partial vacuum, forcing air out of the chamber; next heat is applied, </span>sublimating<span> the ice; finally a freezing coil traps the vaporized water. This process continues for hours, resulting in a freeze-dried ice cream slice. </span>
4 0
3 years ago
Other questions:
  • What comes after observations when scientific knowledge is gathered
    6·1 answer
  • The instrument that is commonly used to measure the intensity of radioactivity is called a _____.
    9·2 answers
  • What pressure will be exerted by 26g if CO2 at a temperature of 35C and a volume of 550ml?
    8·1 answer
  • Molecules that are optically active due to the tetrahedral arrangement of bonds around the carbon atom are often referred to as
    10·1 answer
  • Use the helium-4 isotope to define atomic number and mass number. why does knowledge of atomic number enable us to deduce the nu
    7·1 answer
  • Is ibuprofen conductive in water?
    6·1 answer
  • 14. Which group of diamagnetic transition metals exhibits trends in density and melting points that don't match the same trends
    9·1 answer
  • 20 POINTS!!<br> Kinetic and Potential Energy
    13·2 answers
  • I need help with science pls​
    6·1 answer
  • Solid potassium fluorine gas → solid potassium fluoride balanced
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!