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
UNO [17]
3 years ago
9

When polluted water runs off into rivers and groundwater, it reduces the amount

Chemistry
1 answer:
ankoles [38]3 years ago
8 0

Answer:

Sewage pollutes our waters with pathogens, excess nutrients, heavy metals, and other toxins. It kills aquatic life and creates algal blooms that can suffocate fisheries. Sewage carries pathogens that can end up in our drinking water supplies and swimming areas.

Missing:

Explanation:

You might be interested in
Who wants to be my friend, and I just began
shepuryov [24]

Answer:

i want to be your friend

7 0
3 years ago
In their notebook you see that it takes 9 hours for a sixth of a 0.5M solution of BC2 to react. Unfortunately, you have somewher
trasher [3.6K]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The concentration of BC_2 that should used originally is C_Z_o = 0.4492M

Explanation:

     From the question we are told that

         The necessary elementary step is  

                  2BC_2 ----->4C + B_2

          The  time taken for sixth of 0.5 M of reactant to react t = 9 hr

           The time available is t_a = 3.5 hr

             The desired concentration to  remain C  = 0.42M

Let Z be the reactant ,   Y be the first product and X the second product

Generally the elementary rate  law is mathematically as

                    -r_Z = kC_Z^2 = - \frac{d C_Z}{dt}

Where k is the rate constant ,  C_Z is the concentration of Z

From the elementary rate law we see that the reaction is second order (This because the concentration of the reactant is raised to power 2 )

 For second  order reaction

            \frac{1}{C_Z}  - \frac{1}{C_Z_o}  = kt

Where C_Z_o is the initial concentration of Z which a value of   C_Z_o = 0.5M

       From the question we are told that it take  9 hours  for the concentration of  the reactant to become

                 C_Z =  C_Z_o - \frac{1}{6}  C_Z_o

                  C_Z = 0.5  - \frac{0.5}{6}

                       = 0.4167 M

So      

                     \frac{1}{0.4167}  - \frac{1}{0.50}  =  9 k

                          0.400 = 9 k

                =>    k = 0.044\  L/ mol \cdot hr^{-1}

  For   C_Z = 0.42M

                \frac{1}{0.42} - \frac{1}{C_Z_o}  = 3.5 * 0.044

                2.38 -  0.154  =    \frac{1}{C_Z_o}

                           2.226  =    \frac{1}{C_Z_o}

                            C_Z_o = \frac{1}{2.226}

                             C_Z_o = 0.4492M

                       

           

             

         

4 0
3 years ago
Is buoyancy a physical or chemical property?
gizmo_the_mogwai [7]
Buoyancy is considered a physical property. It is a type of physical property because it is related to the density and weight of the item, which are both physical.
7 0
2 years ago
When the equation C2H4+O2—>CO2+H2O is balanced using smallest whole numbers, what is the coefficient of the O2?
tamaranim1 [39]

Answer:

The answer to your question is letter C. 3

Explanation:

Unbalanced chemical reaction

                     C₂H₄   +   O₂    ⇒    CO₂   +   H₂O

                   Reactants      Elements    Products

                        2                     C                  1

                        4                     H                  2

                        2                     O                  3

Balanced chemical reaction

                      C₂H₄   +   3O₂    ⇒    2CO₂   +   2H₂O

                   Reactants      Elements    Products

                        2                     C                  2

                        4                     H                  4

                        2                     O                  6

The coefficient of Oxygen is three.

7 0
3 years ago
To make a 450g solution with a mass by mass concentration of 7%, how much salt and water do you need to mix?
Tasya [4]

Answer:salt: 31. 5g

water: 418. 5g

Explanation

3 0
2 years ago
Read 2 more answers
Other questions:
  • Like charges are attracted to one another. <br><br><br> True<br><br> False
    14·2 answers
  • Explain the composition of dna nucleotides and the structure of the dna molecule need help
    11·1 answer
  • If a sodium atom looses an electron to form an ion what is its charge?
    10·2 answers
  • Which process transfers heat from the ground to the air touching it? Conduction Convection Evaporation Radiation
    7·1 answer
  • For the following reaction, 30.1 grams of carbon disulfide are allowed to react with 95.9 grams of chlorine gas. carbon disulfid
    9·1 answer
  • 1) Ions are formed between positive or negative charge.
    11·1 answer
  • Aromatic compounds aliphatic compounds
    10·1 answer
  • When 100ml of M HCl is mixed with 100ml of N NaOH, the pH of the resulting solution is
    5·1 answer
  • HELPP ILL GUVE YOU LOTS OF POINTS EVERYTHING U WANT I REALLY NEED HELP ​​
    10·1 answer
  • Which element is classified as a metal?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!