-12 M? What is the [H 30 +] in a solution with [OH ] = 1 x 10
1 x 10-12 M
O 1x102 M
1x 10-7
0 1 x 10-8
1 x 10-2

1 × 10⁻² M

Explanation:

What is the [H₃O⁺] in a solution with [OH⁻] = 1 × 10⁻¹² M?

Step 1: Given data

Hydroxile ion concentration ([OH⁻]): 1 × 10⁻¹² M

Step 2: Calculate the concentration of the hydronium ion

Let's consider the self-dissociation of water.

2 H₂O(l) ⇄ H₃O⁺(aq) + OH⁻(aq)

We can calculate the concentration of the hydronium ion using the ion product of water.

Kw = 10⁻¹⁴ = [H₃O⁺] [OH⁻]

[H₃O⁺] = 10⁻¹⁴ / [OH⁻] = 10⁻¹⁴ / 1 × 10⁻¹² = 1 × 10⁻² M

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3