Talc Is a Mineral with Low Conductivity for Heat and Electricity

question 79

Multiple Choice

Talc is a mineral with low conductivity for heat and electricity which is not attacked by acid. It is used in talcum powder and face powder. Suppose a sample of talc weighs 13.65 g with a density of 1.75 g/cm³ in mineral oil. If this same sample of talc in air weighs 35.97 g, assuming no volume change, what is the density of the talc sample in air?

• A) 4.61 g/cm³
• B) 2.82 g/cm³
• C) 2.63 g/cm³
• D) 2.44 g/cm³
• E) 1.61 g/cm³

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