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(a)
Interpretation:
The given number is to be rounded off to three significant digits.
Concept introduction:
A value can be rounded off up to some significant digits. When the first non-significant digit is less than five, then all significant digits are eliminated. When the first non-significant digit is greater than or equal to five, then one is added to the last significant digit and all significant digits are eliminated.
(b)
Interpretation:
The given number is to be rounded off to three significant digits.
Concept introduction:
A value can be rounded off up to some significant digits. When the first non-significant digit is less than five, then all significant digits are eliminated. When the first non-significant digit is greater than or equal to five, then one is added to the last significant digit and all significant digits are eliminated.
(c)
Interpretation:
The given number is to be rounded off to three significant digits.
Concept introduction:
A value can be rounded off up to some significant digits. When the first non-significant digit is less than five, then all significant digits are eliminated. When the first non-significant digit is greater than or equal to five, then one is added to the last significant digit and all significant digits are eliminated.
(d)
Interpretation:
The given number is to be rounded off to three significant digits.
Concept introduction:
A value can be rounded off up to some significant digits. When the first non-significant digit is less than five, then all significant digits are eliminated. When the first non-significant digit is greater than or equal to five, then one is added to the last significant digit and all significant digits are eliminated.
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Chapter PSS Solutions
EP INTRODUCTORY CHEM.-MOD.MASTERINGCHEM
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- Draw the mechanism for the following Friedel-Craft reaction. AlBr3 Brarrow_forward(a) Draw the structures of A and B in the following reaction. (i) NaNH2, NH3(1) A + B (ii) H3O+arrow_forwardFor the reaction 2 N2O5(g) → 4 NO2(g) + O2(g), the following mechanism has been proposed: N2O5 →> NO₂+ NO3_(K1) NO2 + NO3 → N2O5 (k-1) NO2 + NO3 → → NO2 + O2 + NO (K2) NO + N2O5- NO2 + NO2 + NO2 (K3) d[N₂O5] __2k‚k₂[N2O5] Indicate whether the following rate expression is acceptable: dt k₁₁+ k₂arrow_forward
- Consider the following decomposition reaction of N2O5(g): For the reaction 2 N2O5(g) → 4 NO2(g) + O2(g), the following mechanism has been proposed: N2O5 → NO2 + NO3 (K1) NO2 + NO3 → N2O5 (k-1) NO2 + NO3 → NO2 + O2 + NO (K2) NO + N2O5 → NO2 + NO2 + NO2 (K3) Indicate whether the following rate expression is acceptable: d[N2O5] = -k₁[N₂O₂] + K¸₁[NO₂][NO3] - K¸[NO₂]³ dtarrow_forwardIn a reaction of A + B to give C, another compound other than A, B or C may appear in the kinetic equation.arrow_forwardFor the reaction 2 N2O5(g) → 4 NO2(g) + O2(g), the following mechanism has been proposed: N2O5 →> NO₂+ NO3_(K1) NO2 + NO3 → N2O5 (k-1) NO2 + NO3 → → NO2 + O2 + NO (K2) NO + N2O5- NO2 + NO2 + NO2 (K3) d[N₂O5] __2k‚k₂[N2O5] Indicate whether the following rate expression is acceptable: dt k₁₁+ k₂arrow_forward
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