Gold is found in seawater at very low levels, about 0.05 ppb by mass. Assuming that gold is worth about $1300 per troy ounce, how many liters of seawater would you have to process to obtain $1,000,000 worth of gold? Assume the density of seawater is 1.03 g/mL and that your gold recovery process is 50% efficient.

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A:

Q: Why does sodium fluoride have a melting point of 993°C but nitrogen has a melting point of -210°C?

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A: The role of Chemistry in environmental protection has to be given,

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A: Given : Mass of sample = 93.6 g Concentration of lead = 15.65ppm

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Q: Rank the following in terms of increasing melting point: MgCI2__ NaCI__ AICI3__

A: Higher the charge, higher will be the lattice energy, higher will be the boiling point.

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A: Samples A= Fullerenes+ C16 to C70B = Nano diamondC = C60+carbon nanotubesD = graphite+ graphene

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Q: Consider this list of substances: H2O, Na, NaOH, CH4. Match these substances with the properties…

A: To match: the properties of the given substances.

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A: Solutions- Crystals are hydrated because water molecule in present inside the crystal.

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Q: .

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Q: Bronze

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Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.