At 25 â°c, what is the hydroxide ion concentration, [ oh â ] , in an aqueous solution with a hydrogen ion concentration of [ h + ] = 5.0 ã 10 ^â 4 m?

[OH⁻] = 2.0 × 10⁻¹¹ M

Explanation:

Given data

We can calculate the concentration of hydroxide ion using the following expression.

[H⁺].[OH⁻] = Kw

where,

Kw is the ionic product of water (Kw = 1.0 × 10⁻¹⁴ at 25°C)

[H⁺].[OH⁻] = Kw

[OH⁻] = Kw/[H⁺]

[OH⁻] = 1.0 × 10⁻¹⁴/5.0 × 10⁻⁴

[OH⁻] = 2.0 × 10⁻¹¹ M

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.