Question # 1

Empricial formula of sand is.

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SiO2

SiO3

SiO4

SiO

Which is the correct formula of calcium phosphide.

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CaP

Ca₃P₂

CaP₂

Ca₂P₃

40 g of H₃PO₄ contains numebr of moles

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0.58 g

4.8 g

5.8 g

0.408 g

How many atoms are present in one gram of H2O?

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1002 x 10²³ atom

6.022 x 10²³atom

0.334 x 10²³atom

2.004 x 10²³atom

Molecular mass of Acetic Acid

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70 amu

43 amu

60 amu

80 amu

Which one of the following compounds will hae the highest percentage of the mass of nitrogen?

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N2H4

CO (NH2)2

NH3

NH2OH

When one mole of each of the following compounds is reacted with oxygen, which wil produce the maximum amount CO2?

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Carbon

Ethane

Diamond

Methane

Number of moels in 29.25 g NaCl is.

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0.50

0.25

0.21

0.75

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