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4 years ago

9

Why do some earthquakes cause more damage than others?

2 answers:

babymother [125]4 years ago

7 0

Why Some Earthquakes<span> Are </span>More<span> Destructive. ... If your heart beats rapidly during an </span>earthquake, it still doesn't compete with high-frequency waves generated by the quake. These waves shake the ground faster than<span> your ticker's thrumming and </span>cause<span> the </span>most damage<span> to smaller structures, such as houses.</span>

daser333 [38]4 years ago

6 0

Because earthquakes have different magnitudes. it depends on how the earthquake happens. the magnitudes measured by richter scale usually.

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3 years ago

6 NaOH + 2 Al --> 2 Na3AlO3 + 3 H2 If you start with 258 g of Al, how many moles of Na3AlO3 can you make?

tatyana61 [14]

Solution :

Assuming all Al will be consumed in the reaction.

From the given equation, 2 mole of Al produce 2 mole of $Na_3AlO_3$ .

So, 1 mole of Al produce 1 mole of $Na_3AlO_3$ . .....statement 1)

Number of moles of Al in 258 gram of Al.

$n = \dfrac{mass}{molar\ mass}\\\\n = \dfrac{258}{27}\ moles\\\\n = 9.556 \ moles$

Therefore, from statement 1) number of moles of $Na_3AlO_3$ produced is also 9.556 moles.

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3 years ago