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Olin [163]
2 years ago
14

PLEASE HELP 50 POINTS!!!!!

Chemistry
1 answer:
OLEGan [10]2 years ago
8 0

Answer: This is what an effective conclusion should include.

Restate: Restate the lab experiment. Describe the assignment.

Explain: Explain the purpose of the lab. What were you trying to figure out or discover? ...

Results: Explain your results. ...

Uncertainties: Account for uncertainties and errors. ...

New: Discuss new questions or discoveries that emerged from the experiment.

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Sladkaya [172]

Answer:

2 Mg + O2 -> 2 MgO

is a synthesis reaction.

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PLEASE HELP ASAP I NEED IT
Lapatulllka [165]

the answer is true the first one

3 0
3 years ago
(a) The student dissolves the entire impure sample of CuSO4(s) in enough distilled water to make 100.mL of solution. Then the st
Talja [164]

Answer:

Explanation:

Given parameters :

Volume of solution  = 100mL

Absorbance of solution  = 0.30

Unknown:

Concentration of CuSO₄ in the solution = ?

Solution:

There is relationship between the absorbance and concentration of a solution. They are directly proportional to one another.

A graph of absorbance against concentration gives a value of 0.15M at an absorbance of 0.30.

The concentration is 0.15M

Also, we can use:  Beer-Lambert's law;

                    A  = ε mC l

where εm is the molar extinction coefficient

             C is the concentration

             l is the path length

Since the εm is not given and assuming path length is 1;

         Then we solve for the concentration.

3 0
3 years ago
Why alkali metals easly ionize
Dmitriy789 [7]
Here’s what I found:

It takes very little energy to remove that outermost electron from an alkali metal. Thus, alkali metals easily lose their outermost electron to become a +1 ion. ... In fact, as you go down the 1A column, the first ionization energies get lower and lower, making cesium the most easily ionized element on the periodic table.

So basically it’s because part of what makes alkali metals so reactive is that they have one electron in their outermost electron layer.
7 0
3 years ago
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