Question # 1

Tin has isotopes.

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9

10

11

12

The element nickel has isotopes.

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3

2

5

7

the number of Al³⁺ ion sin AlCl₃is 2.007 x 10²³. The number of Cl- ions are.

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6.02 x 10²³

3.01 x 10²³

1.5 x 10²³

What is the mass of aluminium is 204 g of the aluminum oxide Al2O3.

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26 g

27 g

54 g

108 g

Haemoglobin is a Macro molecule and consists of approximately atoms.

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5000

10,000

68000

15000

Isotopes differ in.

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Properties which depend upon mass

Arrangement of electrons in orbitals

Chemical properties

None of these

The mass fo 1.505 x 10²³atoms of sulphur is.

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0.5 g

0.6 g

0.7 g

0.8 g

Isotopes are the atoms of same element with similar chemical properties but different

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Atomic number

Atomic volume

Atomic weight

Atomic structure

The smallest collection of ions in an ionic compound is called.

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Formula unit

Chemical formula

Formula mass

Molecular formula

27g of Al will react completely with how much mass of O2, to produce Al2O3.

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8 g of oxygen

16 g of oxygen

32 g of oxygen

24 g of oxygen

The separation of the different isotopes in the mass spectrometer is done on the basis of

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Different amounts of positive changes

Charge e/m value different amounts of negative changes

Different m/e value

Velocities of the ions

Bromine has isotopes

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2

4

8

6

One mole of SO2 contains

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6.02 x 10²³atoms of oxygen

18.1 x 10²³atoms of SO2

6.02 x 10²³atoms of Sulphur

4 g atoms of SO2

If four moles of sulphur dioxide are oxidized to sulphur trioxide, how many moles of oxygen are needed.

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0.5

1.0

1.5

2.0

More abundant isotope of an element is the one with.

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Even atomic number

Odd atomic number

Even mass number

Odd mass number

The volume occupied by 1.4 g on N₂at S.T.P is

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

The number of electrons in one mole of hydrogen gas is.

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6.02 x 10²³

12.04 x 10²³

Only two

Indefinite

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