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3 years ago

What is the H+ concentration when pH is 2, 6, 7, 8, and 12?

Chemistry

2 answers:

Mariulka [41]3 years ago

6 0

Answer:

See below.

Explanation:

pH = - log (H+)

So the pH of 1 x 10^-7 M solution is 7.

I'm sorry but I'm not sure about what the other units mean, so Im not sure of the answer to those.

If you convert the other units to the form 1 x 10^-n then the pH will be n.

stealth61 [152]3 years ago

4 0

Answer:

What is the H+Concentration when oh is2,6

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2 years ago

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How much water would be needed to completely dissolve 1.52 L of the gas at a pressure of 730 torr and a temperature of 21 ∘C?

Sophie [7]

Answer:

The correct answer is 0.4 L.

Explanation:

The mentioned question can be solved by using the equation,

C = K × Pgas--------(i)

Here K is the Henry law constant whose value is 0.158 mol/L/atm, C is the concentration of the gas in liquid state, and Pgas is the partial pressure of the gas.

Now to find the volume of water, the formula to be used is,

PV = nRT-----------(ii)

Here P is the pressure of the gas, V is the volume, R is the universal gas constant whose value is 0.082 Latm/mol/K and T is the temperature.

PgasV = nRT

Pgas = nRT/Vgas

The value of Pgas is inserted in equation (i) we get,

C = K × nRT/Vgas

It is to be noted that C = n/V, here n is the no. of the moles and V is the volume of liquid.

n/Vliquid = K × nRT/Vgas

1/Vliquid = KRT/Vgas

Vliquid = Vgas/KRT--------------(iii)

Based on the given information, the volume of the gas is 1.52 L, the value of K is 0.158 mol/L/atm, the value of R is 0.082 Latm/mol/K and value of T is 21 degree C or 273 + 21 = 294 K.

Now putting the values in equation (iii) we get,

Vliquid = 1.52 L / 0.158 × 0.082 × 294

Vliquid = 1.52 / 3.809

Vliquid = 0.399 or 0.4 L

Hence, the volume of water required to dissolve 1.52 L of gas is 0.4 L.

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3 years ago

A molecule contains five atoms and has a molecular weight of 85 g per mole. the atoms are of elements with atomic numbers 1, 6,

inessss [21]

Answer:

Dichloromethane

Explanation:

As we know the atomic number given belongs to following elements, i.e.

Atomic # Element M.Mass

1 Hydrogen 1 g.mol⁻¹

6 Carbon 12 g.mol⁻¹

17 Chlorine 35.5 g.mol⁻¹

Also the molecular formula of Dichloromethane is,

= CH₂Cl₂

Putting molar masses of each element,

= (12)₁ + (1)₂ + (35.5)₂

= 12 + 2 + 71

= 85 g.mol⁺¹

Result:

Hence the only possible structure containing 5 atoms is Dichloromethane.

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3 years ago