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RSB [31]
4 years ago
8

Difference between silicon and sulphur​

Chemistry
1 answer:
ASHA 777 [7]4 years ago
6 0

Answer:

  1. silicon is a metal. sulfur is a non metal
  2. sulfur has a higher mass number than silcon
  3. silcon has a charge of +3 but sulfure has -2
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How many mL of 1.50 M hydrochloric acid will neutralize 25 mL of 2.00 sodium hydroxide?​
Lostsunrise [7]

Answer: The Answer is 18.7ml.

Explanation: Solved in the attached picture.

5 0
4 years ago
What is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl?
Harrizon [31]
First you need to find the balanced chemical formula.
CuCl₂+2NaNO₃→2NaCl+Cu(NO₃)₂

Then you can find out how much NaCl 31.0g of CuCl₂ should produce using stoichiometry.  Divide 31.0g by the molar mass of CuCl₂ (134.446g/mol) to get 0.2306mol CuCl₂.  Than multiply 0.2306mol CuCl₂ by 2 to get 0.4612mol NaCl.  Than multiply 0.4612mol by the molar mass of NaCl (58.45g/mol) to get 26.95g of NaCl.
that means that 100% yield would give you 26.95g of NaCl so to find percent yield divide 21.2 by 26.95 to get 0.7867 which is 78.7% yield

Therefore the answer is 78.7% yield.
I hope this helps.  Let me know if anything is unclear
3 0
3 years ago
What is the approximate age of the oldest fossils of early human ancestors?
Vesna [10]

Answer:approx 300,000 years ago

Explanation:

Fossils attributed to H. sapiens, along with stone tools, dated to approximately 300,000 years ago, found at Jebel Irhoud, Morocco yield the earliest fossil evidence for anatomically modern Homo sapiens

7 0
3 years ago
Read 2 more answers
Yellowstone National Park has an average of about 4500 bison living in it. The park covers 3472 square miles. What is the popula
hoa [83]

Ans) 1.3 bison/mile

Soln:} See according to the question, Yellowstone National Park has an average of about 4500 bison living in it.

Area covered by Yellowstone park is 3472 miles.

So, to find the density of bisons living in Yellowstone Park we have to divide the no. of bisons by given area.

= 4500/3472

which is approximately 1.3 bisons per mile.

Therefore option a) is correct

Hope it helps!!!

8 0
3 years ago
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Three substances are poured in a cylinder with different densities. Draw the cylinder with the three layers and identify the sub
Arlecino [84]

Explanation:

hrydhdhdhfhjfhfufufu

3 0
4 years ago
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