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Anuta_ua [19.1K]
3 years ago
11

What is the hydroxide ion concentration of a solution with a pH of 4?

Chemistry
1 answer:
sashaice [31]3 years ago
8 0

Answer:

Jules

Explanation:

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A compound is 44.7% P and the rest O. Determine its emperical formula.
svet-max [94.6K]

Answer:  

P₅O₁₂

<em>Explanation:  </em>

Assume that you have 100 g of the compound.  

Then you have 44.7 g P and 55.3 g O.  

1. Calculate the <em>moles</em> of each atom  

Moles of P  = 44.7 × 1/30.97 = 1.443 mol Al  

Moles of O = 55.3 × 1/16.00 = 3.456 mol O  

2. Calculate the <em>molar ratios</em>.  

P: 1.443/1.443 =   1  

O: 3.456/1.443 = 2.395

3. Multiply by a number to make the ratio close to an integer

P:  5 × 1         =  5

O: 5 × 2.395 = 11.97

3. Determine the <em>empirical formula </em>

Round off all numbers to the closest integer.  

P:   5

O: 12

The empirical formula is <em>P₅O₁₂</em>.  

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3 years ago
Suppose you mix several liquids in a jar. After a few minutes, the liquids form layers.Is this a homogenous mixture or a heterog
Aliun [14]

heterogeneous mixture, because, the layers are called phases and a heterogeneous mixture has two or more phases. the oil phase is less dense then water so it floats on top, etc.

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Draw the Lewis dot structure for water.
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It would be HO2 Around there
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Which of these molecules and polyatomic ions cannot be adequately described using a single Lewis structure? Check all that apply
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<h3><u>Answer;</u></h3>

 CO3^2- and O3

<h3><u>Explanation;</u></h3>
  • Ozone, O3 is a molecule composed of three oxygen atoms joined together. Two oxygen atoms joined together form the basic oxygen molecule O2.
  • A polyatomic ion is a charged particle which has two or more atoms held together by covalent (sharing of pairs of electrons) bonds.
  • Carbonate (CO3^2-) is an example of polyatomic ion. It can not be adequately described using Lewis structure.
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3 years ago
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