- Explain why density decreasing with depth–is unlikely anywhere in the Earth system?

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Naphthalene sublimation rate=3*10^-5/min. Volume of room=60m^3. How would I calculate the naphthalene concentration in the air of the room? I'm trying to find a compound that contains an alkaline earth metal and a polytomic ion and then finding its molar mass.? If 5sinθ = 3 determine the value of:
1. cos (θ-360)
2. Tan (squared)θ
3. Sin θ x cos θ (all divided by cos (squared θ)? What forms when propene reacts with HCN? I need to describe two ways I would measure moles in chemistry lab and identify any equipment I would use?