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Svetach [21]
2 years ago
12

How many atoms of each element are in NaCI?

Chemistry
1 answer:
gavmur [86]2 years ago
3 0

Answer:

well first you need 1 s then you need 1 ch

Explanation:

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What concentration of monosodium phosphate would be required to make a solution of pH 7.4 with 0.2 M disodium phosphate ( pKa
denis-greek [22]

Answer:

The concentration of monosodium phosphate is 0.1262M

Explanation:

The buffer of H₂PO₄⁻ / HPO₄²⁻ (Monobasic phosphate and dibasic phosphate has a pKa of 7.2

To determine the pH you must use Henderson-Hasselbalch equation:

pH = pKa + log [A⁻] / [HA]

<em>Where [A⁻] is molarity of the conjugate base of the weak acid, [HA].</em>

For H₂PO₄⁻ / HPO₄⁻ buffer:

pH = 7.2 + log [HPO₄⁻² ] / [H₂PO₄⁻]

As molarity of the dibasic phosphate is 0.2M and you want a pH of 7.4:

7.4 = 7.2 + log [0.2] / [H₂PO₄⁻]

0.2 = log [0.2] / [H₂PO₄⁻]

1.58489 = [0.2] / [H₂PO₄⁻]

[H₂PO₄⁻] = 0.1262M

<h3>The concentration of monosodium phosphate is 0.1262M</h3>

<em />

8 0
3 years ago
A teacher wrote the following part of a balanced chemical equation: Cu+2AgNO 3 To show the conservation of matter in the chemica
Llana [10]
2, because there are 2 silver atoms on the left
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2 years ago
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A gas cylinder contains exactly 15 moles of oxygen gas (O2). How many molecules of oxygen are in the cylinder?
erik [133]
The answer is C.) 9.03 * 10^24
5 0
3 years ago
What is a forensic paleontologist?<br>dum it down for me​
raketka [301]

Answer:

Simple Definition: A Tool for “Intelligence” and Investigation

Explanation:

Intelligence is the ability to acquire and apply knowledge and skills while investigation is the action of investigating something or someone; formal or systematic examination or research.

4 0
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What is the maximum amount in moles of P2O5 that can theoretically be made from 176 g of O2 and excess phosphorus?
Strike441 [17]

Answer:

<em>2</em><em>.</em><em>6</em><em>0</em><em> </em><em>mol</em><em>2</em>

Explanation:

2.60mol2 is ur answer

5 0
3 years ago
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