that answer of -243°C marked as a wrong answer. Do we calculate Sig Figs in that ? (1.23 atm)(16.5 L)/ (8.3 moles)( 0.0821 atmxL/molxK) = 29.77295643 K  do we round up to 29.8K 3 Sig Figs? or  30K to 2 Sig Figs? and if 30K-273 K = -243.0°C  or 29.8K-273K = -243.2°C  ??

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.