Answer:
proper disposal of radioactive wastes, proper labelling of contents, banning nuclear tests, and using alternative eco-friendly sources of energy.
Answer:
Lead, Pb.
Explanation:
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In this case, since the molar mass of the compound is 293.8 g/mol, and the molecular formula is NaXO₄, we infer that the molar mass is computed via:
Thus, we can solve for the atomic mass of X as shown below:
Thus, the element whose atomic mass is about 206.8 g/mol is lead (207.2 g/mol) even when it is not properly a transition metal.
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Answer:
a) B
b) A
c) B
d) A
Explanation:
If the strength of an inter-molecular force increases, then
vapour pressure decreases and boiling point increases
- Hence, B is a gas at 300 mmHg due to its low boiling point
- A has a higher boiling point because of its strong inter-molecular forces
- B has weaker inter-molecular forces due to its higher vapour pressure
- A has higher heat of vaporization, because it has strong inter-molecular forces
Answer:-
(iv) (i) + (II)
Explanation:-
Hydrogen bonds Occur between Hydrogen and an element with high electronegativity like N or O.
DNA base pairs are arranged such that they are complimentary. Hence hydrogen bonding will occur between both the amide carbonyl and NH2 as well as the amide NH and Nitrogen of the cyclic C=N-C group.