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3 years ago

A student has a solid block of steel and a solid plastic block of the same size.

Chemistry

1 answer:

Colt1911 [192]3 years ago

4 0

The answer is the mass of the steel block is greater than the mass of the plastic block.

Explanation:

Steel has more thickness than plastic and wood. In this way, its mass will be more noteworthy and thus it will have a more noteworthy estimation of inertia, as inactivity of a body is estimated by the mass of the body. The mass of the steel is more noteworthy than the mass of the plastic.

Here the thickness of steel is more than plastic and wood. On the off chance that an article has more thickness than the other item, their masses would be more prominent because mass is corresponding to thickness.

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Calculate the number of moles in 7.41 X 1017 atoms Ag.

jolli1 [7]

Answer:

1.23x10^-6 mole

Explanation:

A clear understanding of Avogadro's hypothesis proved that 1mole of any substance contains 6.02x10^23 atoms. This indicates that 1mole of Ag contains 6.02x10^23 atoms.

Now, 1f 1mole of Ag contains 6.02x10^23 atoms, then Xmol of Ag will contain 7.41x10^17 atoms i.e

Xmol of Ag = 7.41x10^17/6.02x10^23 = 1.23x10^-6 mole

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Answer:

a) $^{131}_{53} I$

b) $^{192}_{77} Ir$

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Explanation:

The symbols of the isotopes are written like

$^{A}_{Z} X$

where,

X is the element

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Z is the atomic number (protons)

a) Iodine-131

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The atomic number of iridium is 77. The mass number of this isotope is 192. The symbol is $^{192}_{77} Ir$ .

c) Samarium-153

The atomic number of samarium is 62. The mass number of this isotope is 153. The symbol is $^{153}_{62} Sm$ .

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