Chromium Often Is Electroplated on Other Metals and Even Plastics

question 40

Multiple Choice

Chromium often is electroplated on other metals and even plastics to produce a shiny metallic appearance.How many grams of chromium would plate out from a solution of Cr(NO₃) ₃ when 10.0 amps of current are passed through the electrolytic cell for 5.36 hours?

• A)17.3 g
• B)104 g
• C)52.0 g
• D)34.7 g
• E)11.6 g

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Definitions:

Level of Significance

A threshold in hypothesis testing that determines the probability of rejecting a true null hypothesis, often denoted by alpha.

Mean Square

A statistical measure calculated by dividing the sum of squares by the degrees of freedom, often used in variance analysis.

Treatments

Interventions or actions performed in an experimental study to test their effect on an outcome compared to a control condition.

ANOVA

Stands for Analysis of Variance, a statistical method used to compare the means of three or more samples.