A cylindrical piece of Mg is 10 cm long and has a diameter of 8 cm. The density of Magnesium is `0.7 gm//cm^(3)`. How many atoms does piece of Mg cont

Question

A cylindrical piece of Mg is 10 cm long and has a diameter of 8 cm. The density of Magnesium is `0.7 gm//cm^(3)`. How many atoms does piece of Mg cont

A cylindrical piece of Mg is 10 cm long and has a diameter of 8 cm. The density of Magnesium is `0.7 gm//cm^(3)`. How many atoms does piece of Mg contain. `[N_(A) = 6 xx 10^(23)]`
[Divide your answer by `22 xx 10^(23)` ]

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

Related Questions

The beakers A and B containing pure water (A) and an aqueous solution of sugar (B) are placed in a closed glass container. The temperature of the cont

2 Answers 5 Views

Chlorophyll, the green colouring matter of plants responsible for photosynthesis contains 2.68 % of magnesium by mass. The number of magnesium atoms i

2 Answers 5 Views

A flask contains `3.0xx10^(16)` atoms of He. From This `6.6xx10^(15)` atoms of He are removed. The flask now contains atoms of He

2 Answers 6 Views

9.65 C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus obtained is completely converted into a Grig

2 Answers 6 Views

Assertion : When silicon is heated with magnesium in an electric furnace `Mg_(2)Si` is produced Reason: Magnesium reacts with Si directly at high temp

2 Answers 5 Views

Five moles of an ideal gas at 300 K, expanded isothermally from an intinal pressue of 4 atm to a final pressure of 1 atm against a cont. ext pressure

2 Answers 6 Views

I carried 1000 kg of watermelon in summer by train. In the beginning, the water content was 99%. By the time I reached the destination, the water cont

2 Answers 4 Views

Statement-1:Sodium chloride is added during electrolysis of fused anhydrous magnesium chloride. Statement-2:Anhydrous magnesium chloride is obtained b

2 Answers 5 Views

`9*65D` C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus, obtained is completely converted into a

2 Answers 5 Views

The external diameter of a 314 m long copper tube is 1.2 cm and the internal diameter is 1 cm. calculate its resistance if the specific resistance of

2 Answers 7 Views

Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Correct Answer - 4
Volume of cylindrical piece `= pi r^(2)l`
`= pi xx ((8)/(2))^(2) xx 10`
`= (22)/(7) xx 4 xx 4 xx 10`
`= ((22)/(7) xx 160) cm^(3)`
Mass of piece `= (0.7 xx (22)/(7) xx 160) cm^(3)`
`= (22 xx 16) gm`
Atoms of `Mg = ((22 xx 16)/(24)) N_(A) rArr (44)/(3) N_(A)`
`= (44)/(3) xx 6 xx 10^(23)`
`= (88 xx 10^(23))/(22 xx 10^(23)) = 4`