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Step2247 [10]
3 years ago
8

Compare the properties of metals and nonmetals.

Chemistry
1 answer:
Serga [27]3 years ago
5 0

<em><u>Metals </u></em>

- have lustre: they appear shiny

- can conduct heat and electricity

- have a very high melting point

- are malleable(this means they can be hammered without bending)

- have a high density

- can be ductile

- mostly opaque

- make sounds when hit

- corrode easily

<em>Non- metals</em>

- look dull

- don't conduct heat and electricity well

- aren't ductile

- can be at any state at room temperature(solid, liquid, gas)

- mostly transparent


Hope it helps :)

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Estimate the number of moles of water in all the Earth's oceans. Assume water covers 75% of the Earth to an average depth of 3 k
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there are approximately n ≈ 10²² moles

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replacing values

n=3*π*ρ*R² *D/M = 3*π*1000 kg/m³*(6.378*10⁶ m)² *3000 m /(1.8*10⁻² kg/mole) = 3*π*6.378*3/1.8 * 10²⁰ = 100.18 * 10²⁰ ≈ 10²² moles

n ≈ 10²² moles

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