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VMariaS [17]
3 years ago
5

Which organisms dose the mouse in the food web provide energy for? a. deer and snake b. hawk and coyote c. grasshopper and snake

d. butterfly and hawk​
Chemistry
1 answer:
Delicious77 [7]3 years ago
8 0
I would say B) hawk and coyote.


Hope this helps!
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PLEASE HELPPPP!!!!!!!!!!!!
bixtya [17]

Answer:

Largest: Mg

Smallest: Cl

Explanation:

8 0
3 years ago
The pH of 0.10 M solution of an acid is 6. What is the acid dissociation constant of the acid?
svlad2 [7]

Answer: Dissociation constant of the acid is 10^{-11}.

Explanation: Assuming the acid to be monoprotic, the reaction follows:

                         HA\rightleftharpoons H^++A^-

pH of the solution = 6

and we know that

pH=-log([H^+])

[H^+]=antilog(-pH)

[H^+]=antilog(-6)=10^{-6}M

As HA ionizes into its ions in 1 : 1 ratio, hence

[H^+]=[A^-]=10^{-6}M

As the reaction proceeds, the concentration of acid decreases as it ionizes into its ions, hence the decreases concentration of acid at equilibrium will be:

[HA]=[HA]-[H^+]

[HA]=0.1M-10^{-6}M

[HA]=0.09999M

Dissociation Constant of acid, K_a is given as:

K_a=\frac{[A^-][H^+]}{HA}

Putting values of [H^+],[A^-]\text{ and }[HA] in the above equation, we get

K_a=\frac{(10^{-6}M).(10^{-6}M)}{0.09999M}

K_a=1.0001\times 10^{-11}M

Rounding it of to one significant figure, we get

K_a=1.0\times 10^{-11}M\approx 10^{-11}M

6 0
3 years ago
One mole of an ideal gas is expanded from a volume of 1.00 liter to a volume of 8.00 liters against a constant external pressure
Leya [2.2K]

Answer : The work done on the surroundings is, 709.1 Joules.

Explanation :

The formula used for isothermally irreversible expansion is :

w=-p_{ext}dV\\\\w=-p_{ext}(V_2-V_1)

where,

w = work done

p_{ext} = external pressure = 1.00 atm

V_1 = initial volume of gas = 1.00 L

V_2 = final volume of gas = 8.00 L

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

w=-p_{ext}(V_2-V_1)

w=-(1.00atm)\times (8.00-1.00)L

w=-7L.atm=-7\times 101.3J=-709.1J

The work done by the system on the surroundings are, 709.1 Joules. In this, the negative sign indicates the work is done by the system on the surroundings.

Therefore, the work done on the surroundings is, 709.1 Joules.

4 0
3 years ago
At what temperature does the solid start melting?<br> –20°C <br> 0°C <br> 20°C <br> 80°C
Gnesinka [82]

Answer:

0 °C

Explanation:

The melting point of a substance is the temperature at which it changes state from solid to liquid.

Different substance have different melting point.

The melting point of ice at 1 atmosphere of pressure is very  to 0 °C  this is also known as the ice point.

3 0
3 years ago
Read 2 more answers
A pressure of 655 mm hg is equal to how many atmospheres
AysviL [449]

Answer:

0.861842

Explanation:

One atm. equals 760.0 mm Hg, so there will be a multiplication or division based on the direction of the change. Example #1: Convert 0.875 atm to mmHg. Solution: multiply the atm value by 760.0 mmHg / atm.

7 0
3 years ago
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