The correct option is: PERFORM BACKGROUND RESEARCH TO LEARN WHAT IS ALREADY KNOWN ABOUT THE QUESTION YOU ARE TRYING TO ANSWER.
No research is completely new, some research has been done in the past that is related to the investigation you want to carry out, so the first thing you should do is to find out what has been done in the past in your topic of interest and how you can fit in with your research, this is called literature review. Conducting a literature review is very important, because it helps you to avoid doing what other has done in the past.
N=6.98*10²⁴
Nₐ=6.022*10²³ mol⁻¹
n(Mg)=N/Nₐ
m(Mg)=n(Mg)M(Mg)=M(Mg)N/Nₐ
m(Mg)=24.3g/mol*6.98*10²⁴/(6.022*10²³mol⁻¹)=281.7 g
The -1 charge means that there is one more electron than protons, so there are 85 protons
The volume of the brick in cubic centimeters would be:
volume=15 cm x 6.0 cm x 12 cm=1080 cm³
1 m=100 cm
(1 m)³=(100 cm)³ ⇒ 1 m³=1000000 cm³
Therefore:
1080 cm³=1080 cm³ x (1 m³ / 1000000 cm³)=0.00108 m³=1.08 x 10⁻³ m³.
Answer: the volume would be: 0.00108 m³ or 1.08 x 10⁻³ m³
Answer:
d) Ni < Co < Fe < Zn < Al
Explanation:
electronegativity of Aluminium 1.6
electronegativity of Zinc 1.7
electronegativity of iron 1. 83
electronegativity of Cobalt 1.88
electronegativity of Nickel 1.91
As the electronegativity of aluminium is lower as compared to other, so it will have high tendency to easily lose electron and that is why Aluminium is more reactive than the other mentioned