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Interpretation : Hypotheses are developed before experiments are to be inferred.
Concept Introduction : One of the vital steps in the scientific method is a hypothesis.
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Answer to Problem 21LC
A hypothesis should be developed before experiments take place because only then the experiment will confirm or disconfirm the hypothesis and determines whether there is a need for a new hypothesis.
Explanation of Solution
One of the vital steps in the scientific method is a hypothesis.
A hypothesis is a theory put up to explain an observable.
Only if it explains what is really witnessed is it valuable.
The hypothesis must be modified when experimental data does not support it.
Before an experiment is conducted, a hypothesis should be formulated since the purpose of the experiment is to confirm or disprove the hypothesis and to determine whether a new hypothesis is necessary.
Chapter 1 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
- The combustion of 28.8 g of NH3 consumes exactly _____ g of O2. 4 NH3 + 7 O2 ----> 4 NO2 + 6 H2Oarrow_forwardWhat is the molecular formula of the bond-line structure shown below OH HO ○ C14H12O2 ○ C16H14O2 ○ C16H12O2 O C14H14O2arrow_forwardCheck all molecules that are acids on the list below. H2CO3 HC2H3O2 C6H5NH2 HNO3 NH3arrow_forward
- From the given compound, choose the proton that best fits each given description. a CH2 CH 2 Cl b с CH2 F Most shielded: (Choose one) Least shielded: (Choose one) Highest chemical shift: (Choose one) Lowest chemical shift: (Choose one) ×arrow_forwardConsider this molecule: How many H atoms are in this molecule? How many different signals could be found in its 1H NMR spectrum? Note: A multiplet is considered one signal.arrow_forwardFor each of the given mass spectrum data, identify whether the compound contains chlorine, bromine, or neither. Compound m/z of M* peak m/z of M + 2 peak ratio of M+ : M + 2 peak Which element is present? A 122 no M + 2 peak not applicable (Choose one) B 78 80 3:1 (Choose one) C 227 229 1:1 (Choose one)arrow_forward
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