A) machinery lubricant.
Explanation:
Judging from the given description about the compound or material, it can best be used as machinery lubricant.
- A lubricant is substance that eases motion between two bodies.
- It makes motion to occur.
- Highly viscous materials are usually desired.
- Viscosity is the resistance to motion in liquids.
- Since the material has a high viscosity at a high temperature and it is unreactive, then it would fit a good lubricant.
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Answer: -
(a) 1.54 x 10² pm
(b) 1.3 x 10⁶ is the number of carbon atoms could be aligned side by side in a straight line across the width of 0.2 mm.
Explanation: -
1 å = 10² pm
Diameter of a carbon atom = 1.54 å = 1.54 x 10² pm
1 mm = 10⁹ pm
Total distance = 0.2 mm = 0.2 x 10⁹ pm
Number of carbon atoms could be aligned side by side in a straight line across the width = Total distance / Diameter of a carbon atom
= 
= 1.3 x 10⁶
Answer: 9.88 (approx10)
Explanation:
The pOH of a solution is the negative logarithm of the hydroxide-ion concentration
8. Transition metals
9. Halogens
10. Nobel gasses
11. Lanthanides
12. Actinides
13. The tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy.
Answer:
43.7
Explanation:
mole is equal mass concentration/ moler mass of MgCl²
