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schepotkina [342]
1 year ago
7

Difference between practical work inside and outside laboratory​

Chemistry
1 answer:
arsen [322]1 year ago
5 0

Practical work refers to the art of conducting experiments in order to answer certain research questions.

<h3>What is practical work?</h3>

In science, practical work refers to the art of conducting experiments in order to answer certain research questions. This could occur in a laboratory under controlled conditions or in the field.

In the physical sciences, most of the practical work is conducted in the laboratory under controlled conditions. However, some experiments in the biological sciences and most experiments in the social sciences are conducted outside the laboratory.

Learn more about experiments:brainly.com/question/11256472

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Balance the equation ___ CaCO3 -&gt; ____ CaO + ____ CO2
Degger [83]

Answer:

CaCO3 -> CaO + CO2

Explanation:

Woahhhh, did you balance it yourself just then?

3 0
2 years ago
If you combine 320.0 ml of water at 25.00 °c and 120.0 ml of water at 95.00 °c, what is the final temperature of the mixture? us
Inga [223]
The heat from the hotter water will go into the colder water untl equilibrium is reached. Equilibrium is same temperature!

Now, the heat is proportional to the mass, the specific heat and the temperature difference. The specific heat does not matter since all is water, it will cancel out:

m_1 * c_H20 * ( T_final - T_1 ) = -m_2 * c_H20 * ( T_final - T_2)

Notice the minus, because one wins the heat of the one who loses it. In this way both sides have the same sign:

m_1*(T_final - T_1)=-m_2*(T_final-T_2), or after some simple algebra:

T_final = (m_1 * T_1 + m_2 * T_2 )/(m_1+m_2),

which looks like an arithmetic mean, and one could have gone for this, but the above shows all the work. Notice that if T_1=T_2, T_final=T_1 always, which makes sense.

Now you can convert volume to mass with the density, but since mass = density*volume and it is all water, the density will cancel out and you can work with volumes. If you prefer just say: 120 ml->120 g , etc ...

T_final = (120*95+320*25)/(320+120)=44.0909 degrees Celsius, or ~ 44.09 degrees with two decimal precision as your statement (beware of precision always!).

8 0
3 years ago
Which solution has the higher ph, a 0.001 m solution of naoh or a 0.001 m solution of ba(oh)2?
Hoochie [10]
<span>0.001 M Ba(OH)2 has a higher pH</span>
4 0
3 years ago
15.0 g of carbon dioxide (CO2)
Zanzabum

Answer:

I think that you want no, of moles

Explanation:

no, of mole of this amount= 15/44 = 0.341 mole

8 0
3 years ago
A 6.26 g sample of a solid containing ni is dissolved in 20.0 ml water. a 5.00 ml aliquot of this solution is diluted to 100.0 m
saveliy_v [14]
Concentration of Ni in 20mL = 5.28ppm x dilution factor = 5.28 x 100/5 = 105.6 ppm = 105.6 mg/L 

molar mass of Ni = 58.6934 g
<span>Molarity of Ni = 100.40 x 10^{-3} / 58.6934 = 1.71 x 10^{-3} M = 1.71 mM. </span>
5 0
3 years ago
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