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Maslowich
4 years ago
6

How is a hypothesis developed and evaluated?

Chemistry
1 answer:
Yakvenalex [24]4 years ago
5 0
The way the hypothesis is developed and created is when there is a problem and you are trying to solve it. The hypothesis usually includes the words, "If......then.....". The way it's evaluated, is at the end of the science experiment where you did your experiment and compare your answers to what you put as your hypothesis, and if they match, your hypothesis is right!
Thanks.
You might be interested in
3. Oxalic acid, C H20, is a toxic substance found in rhubarb leaves. When mixed with sufficient
harkovskaia [24]

Answer:

COOHCOOH + 2OH⁻ ⇄  C₂O₄²⁻ + 2H₂O

Explanation:

The reaction of oxalic acid with a strong base like sodium hydroxide is the following:

COOHCOOH + OH⁻ ⇄ COOHCOO⁻ + H₂O    (1)

In this first reaction, the oxalic acid loses one proton. In a second reaction with NaOH, the ion COOHCOO⁻ loses its second proton to form ion oxalate as follows:

COOHCOO⁻ + OH⁻ ⇄ C₂O₄²⁻ + H₂O      (2)  

The general reaction between oxalic acid and NaOH is (eq 1 + eq 2):

COOHCOOH + 2OH⁻ ⇄  C₂O₄²⁻ + 2H₂O              

I hope it helps you!  

5 0
3 years ago
What would be your reaction to a claim that a new element had been discovered, and it fit between tin (Sn) and antimony (Sb) in
Anton [14]

Answer:

As explained

Explanation:

My reaction will be positive and I will feel elated that a new elements has been discovered as this will be a modification of the earlier claim by berzelius and the likes that there are over 106 known elements ; Metal, Non Metals and Metalloids.

However, fitting the new discovered element in between Tin and antimony may be an issue, as the physical properties of the new elements has to be known, its melting point, metals or non metals as this is paramount to be able to classify the elements. if the elements fits in between tin and antimony, it is an indication that the elements is mot likely a metal or non-mental and may belong to group IVB or VB. Another issue is, the discoverer will have to create his own periodic table to be able to stand in with the discovery of Dimitriy Mendelev.

8 0
4 years ago
[HELP PLEASE] Describe the difference between the ways valence electrons are rearranged when forming ionic bonds and covalent bo
nydimaria [60]

Answer:

Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

Explanation:

5 0
3 years ago
According to Le Châtelier's principle, how will an increase in concentration of a reactant affect the equilibrium system?
Svetach [21]

Answer:

Shift it toward the products

Explanation:

Imagine this equilibrium:

2A  +  B   ⇄  A₂B

Let's think the expression for Kc:

Kc = [A₂B] / [A]² . [B]

Now, we have this situation:

2A ↑  +  B   ⇄  A₂B

As we are not in equilibrium, we have to think that Kc would decrease.

↓Kc = [A₂B] / [A]² ↑ . [B]

so we have to use Qc (reaction quotient). For this case

Qc < Kc, so the reaction → Product side

We have to make more product to counteract the reagent increase and thus return the system to equilibriumr

3 0
3 years ago
Read 2 more answers
How many moles of chlorine gas can be produced when 162.3 grams of aluminum chloride decompose ?
Volgvan

Answer: 6.77 x 1022 molecules of Cl2.

Explanation: First you need to write the correct BALANCED chemical reaction equation. Then you can determine how many moles of

C

l

2

would be produced from the available moles of Cl in 10.0g of

A

l

C

l

3

. Finally, you will convert this value into the number of molecules using Avogadro's number.

2

A

l

C

l

3

→

2

A

l

+

3

C

l

2

So, TWO moles of

A

l

C

l

3

will produce THREE moles of

C

l

2

.

The molecular weight of

A

l

C

l

3

is 133.33g/mol, so 10.0g is 10.0/133.33 = 0.075mol

With our equation ratio of 3/2 this will produce 0.1125 mol

C

l

2

.

0.1125 * 6.022 x

10

23

molecules/mole = 6.77 x

10

22

molecules of

C

l

2

4 0
3 years ago
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