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Zanzabum
4 years ago
7

Define: Law of Definite Proportion

Chemistry
1 answer:
Katyanochek1 [597]4 years ago
5 0


in the chemistry , the law of definite proportions , sometimes called Proust's law or the law of definite composition states that a chemical compound always contains exactly the same proportion of elements by mass.

law of constant composition- all samples of a given chemical compound have the same elemental composition


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Calculate the dissociation constant of nh4oh(aq) if the degree of dissociation of 0.006 mol/kg solution is 0.053 and the activit
Anastasy [175]

The dissociation equation will be

                         NH4OH   --->        NH4+                   + OH-

Initial                 0.006                        0                          0

Change         -0.006 X 0.053        +0.006 X 0.053      -0.006 X 0.053

Equlibrium     0.006 -0.006 X 0.053      0.006 X 0.053    0.006 X 0.053

Ka = [NH4+] [ OH-] / [NH4OH] = (0.006 X 0.053)^2 / 0.006 -0.006 X 0.053

Ka = 1.78 X 10^-5

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3 years ago
Convert 125m^3 to km^3
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Answer:

1.25e-7

Explanation:

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3 years ago
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Answer:

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Draw the Lewis structure for CH3CH2O2H?
kotegsom [21]

Answer:

hydroperoxyethane

Explanation:

tomsFor the Lewis structure we have to remember that all the atoms must have <u>8 electrons</u> (except for hydrogen). In this structure, we have three types of atoms, Carbon, Hydrogen and Oxygen. So, we have to remember the <u>valence electrons</u> for each atom:

-) Carbon : 4 electrons

-) Hydrogen: 1 electron

-) Oxygen: 6 electrons

We can start with the "CH_3" part. We can put 3 hydrogen bond arroun the carbon. We can use this same logic with  "CH_2". Finally for oxygens, we can put it one bond with CH_2 and a bond between oxygens with a final bond with hydrogen to obtain <u>hydroperoxyethane</u>.

See figure 1 for further explanations.

6 0
3 years ago
Which Ions oxidize aluminum?<br><br> Li^+, Ca^2+, Ag+, Sn^2+
pishuonlain [190]

Aluminum can be oxidized by Li^{+} and Ca^{2+}

<h3>What is oxidizing?</h3>

Some of the metal corrodes (or oxidizes) and forms the corresponding metal oxide on the surface as a result of a chemical reaction between the metal surface and the oxygen in the air. The corrosion products that occur in some metals, like steel, are highly apparent and loose.

According to reactivity series (The array of metals in the descending order of their reactivities is referred to as the metals' reactivity series. It is sometimes referred to as the metals in the activity series.)

Lithium and calcium ions are more reactive than aluminum ion and they are less electronegative.

Since silver and tin are more electronegative than aluminum so, they cannot oxidize aluminum.

∴ Li^{+} and Ca^{+2} ions can oxidize aluminum.

Learn more about electronegativity here brainly.com/question/16446391

#SPJ10

8 0
2 years ago
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