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CHEMISTRY

Chemistry
Chemically ‘Quick Silver is known as

Aluminium
Copper
Silver
Mercury

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Chemistry
The weight of 6.023 × 1022 atoms of carbon is

0.12 gms
1.2 gms
120 gms
12 gms

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Chemistry
If there is one million Mg2+ ions in MgCl2, how many chloride ions are there?

Half a million
Ten million
One million
Two million

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Chemistry
What is the mass percentage of carbon in carbon dioxide (CO2)

0.323
0.158
0.273
0.201

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Chemistry
What is the mass percentage of oxygen in carbon dioxide (CO2)

0.727
0.658
0.509
0.305

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