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Ostrovityanka [42]
3 years ago
9

More than ½ of the world's forests have been lost to deforestation. True False

Chemistry
2 answers:
RideAnS [48]3 years ago
8 0
The answer is false
cestrela7 [59]3 years ago
5 0
<span>According to the World Resources Institute, more than 80 percent of the Earth's natural forests already have been destroyed</span>
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Acetic acid, CH3CO2H, reacts with ethanol, C2H5OH, to form water and ethyl acetate, CH3CO2C2H5. The equilibrium constant for thi
Irina-Kira [14]

Explanation:

The initial concentrations for a mixture :

Acetic acid at equilibrium = 0.15 M

Ethanol at equilibrium = 0.15 M

Ethyl acetate at equilibrium = 0.40 M

Water at equilibrium = 0.40 M

CH3COOH + C_2H_5OH\rightleftharpoons CH_3CO_2C_2H_5+H_2O

Initially:

0.15 M            0.15 M            0.40 M   0.40 M

At equilibrium

(0.15-x)M       (0.15-x) M     (0.40+x) M   (0.40+x) M

The equilibrium constant is given by expression

K_c=\frac{[CH_3CO_2C_2H_5][H_2O]}{[CH_3COOH][C_2H_5OH]}

4.0=\frac{(0.40-x)\times (0.40-x)}{(0.15+x)\times (0.15+x)}

Solving for x:

x = 0.0333

The equilibrium concentrations for a mixture :

Acetic acid at equilibrium = (0.15-x)M = (0.15-0.033) M = 0.117 M

Ethanol at equilibrium = (0.15-x)M = (0.15-0.033) M = 0.117 M

Ethyl acetate at equilibrium = (0.40+x)M = (0.40+0.033) M = 0.433 M

Water at equilibrium = (0.40+x)M = (0.40+0.033) M = 0.433 M

4 0
3 years ago
Select the correct answer.<br> Which characteristic is a property of water?
Dafna1 [17]

Answer: A. It is made of polar molecules.

Explanation:

A polar molecule refers to a molecule that has a covalent bond but has an uneven distribution of electrons due to an atom in the molecule having strong electronegativity which will attract more of the electrons from the other atom.

Water is such a molecule because Oxygen has strong electronegativity which leads to electrons being pulled to it.

3 0
3 years ago
Which object will experience the strongest gravitational attraction to Earth?
Orlov [11]

Answer:

A

Explanation:

The strength of the gravitational force between two objects depends on mass and distance. The object with the greatest mass would be the car.

3 0
3 years ago
Most acid precipitation results from the combination of _____ with water in the atmosphere, forming strong acids that fall with
aleksley [76]

Answer:

             Most acid precipitation results from the combination of <u>Sulfur Oxides and Nitrogen Oxides</u> with water in the atmosphere, forming strong acids that fall with rain or snow.

Explanation:

                    Acid rain is said to be that rain which contains high concentration of H⁺ ions. The main source of acid rain is the elimination of NOₓ (Nitrogen Oxides) and SOₓ (Sulfur Oxides) from different means in industries and other combustion processes on earth.

Examples:

                                 SO₂  +  H₂O     →     H₂SO₄

                                 NO₂  +  OH°    →     HNO₃

From above examples it can be seen that the sulfur and nitrogen oxides when reacted with water forms strong acids. These acids come along with rain water and causes different problems to living organisms and non living objects like buildings.

4 0
3 years ago
. Which groups are identical in all amino acids? (Points : 1)
Murrr4er [49]
The answer is

<span>
only carboxyl groups (=C=OO-</span>
5 0
3 years ago
Read 2 more answers
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