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zheka24 [161]
3 years ago
12

How many grams of solid sodium cyanide should be added to 1.50 L of a 0.175 M hydrocyanic acid solution to prepare a buffer with

a pH of 10.210?
Chemistry
1 answer:
marshall27 [118]3 years ago
7 0
I have -12 points thx a lot
✋⛔️ ❔
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▫️ `
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tankabanditka [31]

Answer:

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Explanation:

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Use the definition of molarity to calculate the concentration of 12.34 g of CaSO4 completely dissolved in water, with a solution
Ede4ka [16]

Answer:

[CaSO₄] = 36.26×10⁻² mol/L

Explanation:

Molarity (M) → mol/L → moles of solute in 1L of solution

Let's convert the volume from mL to L

250 mL . 1L/1000 mL = 0.250L

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12.34 g / 136.13 g/mol = 0.0906 mol

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3 years ago
What must be true of a substance with a lot
LUCKY_DIMON [66]

Answer:

A is the answer.

Explanation:

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What makes up the human body? (A)many different gases (B)carbon dioxide (D)many cells (C) minerals
never [62]

Answer:

<em></em>(B) Carbon Dioxide<em></em>

Explanation:

Roughly 96 percent of the mass of the human body is made up of just four elements: oxygen, carbon, hydrogen and nitrogen, with a lot of that in the form of water. The remaining 4 percent is a sparse sampling of the periodic table of elements

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Generally, which of the three families of elements (metals, nonmetals, or inert gases) has the least tendency to form ionic bond
Sergio [31]

Answer:

Inert gases

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Inert elements have a stable electron configuration meaning their shells/orbitals are full with their requisite number of electrons. Therefore, gaining or losing an electron would take high ionization energy. Therefore they are less likely to be involved in chemical reaction unless a high amount of energy is used. An example of an inert gas is Helium.

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