All categories

3 years ago

Fertilizer runoff has a negative impact on aquatic ecosystems because _______.

2 answers:

7 0

<span>The answer is a. it causes plants and algae to grow quickly, suffocating organisms in the water. The rapid growth of organisms due to fertilizer runoff leads to a process called eutrophication. When the vegetation dies, the process of decomposition leads to the formation of excessive amounts of carbon dioxide, which in turn suffocates aquatic animals.</span>

swat323 years ago

3 0

A .

. it causes a plants and alged to grow quicklly, suffocating organisums in tkhe water

just took the test

You might be interested in

What does mass change to and what does it do

Nataly [62]

Answer:

Mass is the amount of matter in an object and does not change with location.

Explanation:

4 0

3 years ago

How would you decrease the mass number?

iragen [17]

Answer:

Protons are positively charged. When a nucleus emits an alpha particle, these changes happen: the mass number decreases by 4. the atomic number decreases by 2.

Explanation:

7 0

2 years ago

Read 2 more answers

The cell potential of a redox reaction occurring in an electrochemical cell under any set of temperature and concentration condi

avanturin [10]

Answer : The actual cell potential of the cell is 0.47 V

Explanation:

Reaction quotient (Q) : It is defined as the measurement of the relative amounts of products and reactants present during a reaction at a particular time.

The given redox reaction is :

$Ni^{2+}(aq)+Zn(s)\rightarrow Ni(s)+Zn^{2+}(aq)$

The balanced two-half reactions will be,

Oxidation half reaction : $Zn\rightarrow Zn^{2+}+2e^-$

Reduction half reaction : $Ni^{2+}+2e^-\rightarrow Ni$

The expression for reaction quotient will be :

$Q=\frac{[Zn^{2+}]}{[Ni^{2+}]}$

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.

Now put all the given values in this expression, we get

$Q=\frac{(0.0141)}{(0.00104)}=13.6$

The value of the reaction quotient, Q, for the cell is, 13.6

Now we have to calculate the actual cell potential of the cell.

Using Nernst equation :

$E_{cell}=E^o_{cell}-\frac{RT}{nF}\ln Q$

where,

F = Faraday constant = 96500 C

R = gas constant = 8.314 J/mol.K

T = room temperature = 316 K

n = number of electrons in oxidation-reduction reaction = 2 mole

$E^o_{cell}$ = standard electrode potential of the cell = 0.51 V

$E_{cell}$ = actual cell potential of the cell = ?

Q = reaction quotient = 13.6

Now put all the given values in the above equation, we get:

$E_{cell}=0.51-\frac{(8.314)\times (316)}{2\times 96500}\ln (13.6)$

$E_{cell}=0.47V$

Therefore, the actual cell potential of the cell is 0.47 V

4 0

3 years ago

How many moles of H2O are produced from 6.23g of C2H6 in the following reaction? 2C2H6+7O2 -> 4CO2+6H2O

sweet-ann [11.9K]

C2H6 (g) + O2 (g). --> CO2(g)+H2O (g)

2C2H6 (g) + 7O2 (g). --> 4CO2(g)+6H2O (g)

(8.45 x 10^23)/(6.022x10^23) = 1.403 moles H2O

1.403 moles H2O x (4molCO2/6molH2O)= .935 moles CO2

.935 moles CO2 x (6.022 x10^23)= 5.63 x 10^23 molecules CO2

8 0

2 years ago

Read 2 more answers

Rocks, as they are compressed, begin forming mountains above the Earth's surface when two continental plates converge. The conti

Brrunno [24]

The answer is; C

Due to the intense heat and pressure on the rocks, they undergo physical and chemical changes and become new types of rocks called metamorphic rocks. An example of this change is that small crystals may be squeezed into large crystals and the crystals may be rearranged.

7 0

2 years ago