4. A salvage operator recovered coins believed to be gold. A sample weighed 385.000g and has a volume of 20.0mL. Were the coins
gold (Density= 19.3g/mL) or yellow brass (Density =8.47g/mL)? Show your calculation and explain your answer.
1 answer:
Answer:
Gold
Explanation:
We are given that
Mass of sample ,m=385 g
Volume ,V=20mL
We have to find the coin is gold or yellow brass.
We know that
Density=
Using the formula



Density of coin=19.3g/mL
Density of gold=19.3g/mL
Hence, the coin is gold.
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acceleration
Explanation:
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Answer:
V acid = 51.471 mL
Explanation:
- %v/v = [(compoud volumen)/(solution volume)]×100
∴ V solution = 387 mL
∴ %v/v = 13.3 %
compund volume:
⇒ (V acid)/( V sln) = 0.133
⇒ V acid = (0.133)(387 mL)
⇒ V acid = 51.471 mL