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Who proposed the planetary model of the atom with electrons orbiting the nucleus?
What is the name of the process by which ammonia is produced on an industrial scale?
What is eutrophication?
According to the kinetic theory of gases, the pressure exerted by a gas is due to
What is the sum of the oxidation numbers in a neutral compound?
Which of the following reactions would be expected to have the highest entropy change?
Which noble gas is radioactive and is produced as a decay product of uranium and thorium?
What happens to the position of equilibrium, if a reversible exothermic reaction is subjected to a decrease in temperature?
Metal + acid ?¸hydrogen gas.
Acids turn blue litmus red.
Electrons = protons = atomic number.
Neutral pH = 7.
Nitrogen ~78%.
Na from 'natrium'.
Hard water is water with high concentrations of dissolved ions, in particular calcium and
| GAS | CO\(_2\) | N\(_2\) |
O\(_2\) |
| % BY VOLUME | 4 | 72 | 24 |
The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?
What volume of (dm\(^3\)) of water will be added to 10dm\(^3\) of 2.0 mol/dm\(^3\) HCL acid solution to give a final solution of 0.5 mol/dm\(^3\)?
Alkanes are used mainly?
2-methylprop-1-ene is a structural isomer of?
How many bonding pair are present in carbon(iv)oxide?