Answer: the mass of the object
Explanation: To find density, the equation d= m/v is needed where m= mass and v= volume
Answer:
91hours
Explanation:
Firstly, we calculate the quantity of electricity passed.
Q = It
Q = 34.5t
Since we are dealing with cu2+
Cu2+ + 2e- ———> Cu
From the second law of electrolysis, 1 mole of copper ion will need 2 moles of electrons and thus would be needing half faraday of electricity.
Now one faraday would contain 96500C of electricity, 0.5F would contain = 48,250C of electricity .
The number of moles of copper thus deposited = 34.5t/48,250
We know that the mass of copper deposited equals no of moles of copper multiplied by its atomic mass
15kg = 34.5t/48250 * 64
15,000 * 48250 = 34.5t * 64
t = 327,785s
Converting this to hours means we divide by 3,600
327,785/3600 = 91hours
Answer:
2.67 g/mL
Explanation:
Initial Volume of water = 10.0 mL
Final Volume pf water = 15.46 mL
Mass = 14.74g
Density = Mass / Volume of aluminium
Volume of aluminium = Final Volume of water - Initial Volume of water = 15.46 - 10 = 5.46mL
Density = 14.74 / 5.46 = 2.67 g/mL
Oxygen transfers two electrons to magnesium. Oxygen receives two electrons from magnesium. Magnesium forms an ion with +1 charge; oxygen forms an ion with −1 charge.