A Compound Containing Chromium and Silicon Contains 73

question 109

Multiple Choice

A compound containing chromium and silicon contains 73.52 mass percent chromium. Determine its empirical formula.

• A) CrSi₃
• B) Cr₂Si₃
• C) Cr₃Si
• D) Cr₃Si₂
• E) Cr₄Si₃

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Definitions:

Stepwise Regression

A method of regression analysis that involves automatic selection of independent variables to use in a model based on certain criteria.

Backward Elimination

A stepwise regression technique where all predictors are included in the model initially, and then the least significant predictor is removed step-by-step until the best model is identified.

Forward Selection

A stepwise approach in model selection where variables are added one by one based on their statistical significance.

Best-subsets Regression

A statistical method that involves analyzing all possible combinations of variables to identify the model that best fits the data.