The Earth's core is the part of Earth in the middle of our planet. It has a solid inner coreand a liquid outer core.
Answer:
1.08mol
Explanation:
moles = reacting mass/ molecular weight
reacting mass = 80.0g molecular weight of Ca[OH]2= 40 + 2(16 +1) = 74g/mol
mole = 80.0/74 = 1.08mol
Answer:
C. A technological society has both a positive and negative impact on the environment
Explanation:
It is correct to suggest and to acclaim that a technological society has both a positive and negative impact on the environment.
The environment is the region of space where living organisms and non-living components can be found.
- Technology no doubt has opened up our knowledge about the environment.
- We are now aware of very topical issues that affects the environment and how to combat them.
- On the other side, technological advance has also bode poorly for the environment.
- New chemical wastes generated by industrial processes have proven very costly to the environment.
We see that technology has both negative and positive effects on the environment.
Answer:
Average atomic mass = 6.6575.
Explanation:
As fractions the abundance is 1/4 and 3/4.
The average atomic mass = (5.03 + 3(7.20) / 4
= 6.6575.
6. 0.9km=900000mm
7. 11,835.76g=11.83576kg
