2 years ago

What is a polyprotic buffer?

1 answer:

3 0

Buffers - mixtures of conjugate acid and conjugate base at ±1 pH unit from pH = pKa. Resistant to changes in pH in response to small additions of H+ or OH-. ... Polyprotic acids - dissociation of each H+ can be treated separately if the pKa values are different

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.297 kilograms
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Fluorine gas is placed in contact with calcium metal at high temperatures to produce calcium fluoride powder. What is the

Ira Lisetskai [31]

Answer: B aka #2

Explanation:

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Calculate the mass of 0.00456 moles of (NH4)2SO4

Anna [14]

To find the mass you need to find the weight of a mol of the molecules by adding up the atomic mass.

N = 14.007 g/mol
H = 1.008 g/mol
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O = 16 g/mol

2(14.007) + 8(1.008) + 32.065 + 4(16) = 132.143 g/mol

Now you know how much an entire mol weight you multiply it by how much you actually have

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3 years ago

You want to know how many moles of gas your lungs can hold. You start off with a balloon that has 1.4 moles of gas and occupies

Mrrafil [7]

Number of moles : n₂ = 1.775 moles

<h3>Further explanation</h3>

Given

Moles = n₁ = 1.4

Volume = V₁=22.4 L

V₂=28.4 L

Required

Moles-n₂

Solution

Avogadro's hypothesis, at the same temperature and pressure, the ratio of gas volume will be equal to the ratio of gas moles

The ratio of gas volume will be equal to the ratio of gas moles

$\tt \dfrac{V_1}{V_2}=\dfrac{n_1}{n_2}$

Input the values :

n₂ = (V₂ x n₁)/V₁

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Explanation:

here you go for the answer

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