Creates one million jobs (500 000 direct and 500 000 indirect).
Accounts for about 18% of GDP (8.6% direct, 10% indirect and induced).
Is a critical earner of foreign exchange at more than 50%.Accounts for 20% of investment (12% direct).
Attracts significant foreign savings (R1.9-trillion or 43% of value of JSE).
Accounts for 13.2% of corporate tax receipts (R17-billion in 2010) and R6-billion in royalties.
Accounts for R441-billion in expenditures, R407-billion spent locally.
Accounts for R78-billion spent in wages and salaries.Accounts for 50% of volume of Transnet’s rail and ports.
Accounts for 94% of electricity generation via coal power plants.
Takes 15% of electricity demand.
About 37% of the country’s liquid fuels via coal.<span>
</span>With South Africa’s economy built on gold and diamond mining, the sector is an important foreign exchange earner, with gold accounting for more than one-third of exports. In 2009, the country’s diamond industry was the fourth largest in the world. South Africa is also a major producer of coal, manganese and chrome.
Atomic percentages<u>: 68% of copper and 32% of nickel.</u>
How this is calculated?
The given alloy is 100 g ,
m(Cu) = 0,7 · 100 g = 70 g.
m(Ni) = 0,3 · 100 g = 30 g.
n(Cu) = m(Cu) ÷ M(Cu) = 70 g ÷ 63,546 g/mol
n(Cu) = 1,10 mol.
n(Ni) = m(Ni) ÷ M(Ni) = 30 g ÷ 58,71 g/mol
n(Ni) = 0,51 mol
n(Cu) : n(Ni) = 1,10 mol : 0,51 mol
%(Cu) = 1,1 mol ÷ 1,61 mol = 0,68 = 68 %.
Similarly, %(Ni)=32%
What are Cu-Ni alloys?
- Cu-Ni alloys are alloys of copper (base metal with the largest individual content) and nickel with or without other elements, whereby the zinc content may not be more than 1%.
- When other elements are present, nickel has the largest individual content after copper, compared with each other element.
- As with other copper alloys, it is necessary to distinguish between wrought alloys, which are processed to semi-finished products, and cast alloys, from which castings are produced by various casting processes.
To know more about Cu-Ni alloys, refer:
brainly.com/question/16856761
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Answer:
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tissue=2
Explanation:
i just did the question right now and i got them all correct.
After alpha decay (234,90) remain from it
