3 years ago

Why did a drop of water need to be added in order to initiate the reaction?

Chemistry

2 answers:

jeka57 [31]3 years ago

5 0

D.because the water is needed to wet the sand and keep the reaction safe

Rufina [12.5K]3 years ago

3 0

I think it’s D . If that’s not it I’m sry I tried lol

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Solar, wind, and water power are renewable resources and can replace our dependence on fossil fuels. They each have their own dr

Vesna [10]

Solar- the sun is not always shining, for example at night you can't get any energy from the sun
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Really the main issue of all three of these is that they are not always available

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4 years ago

An elastic cord can be stretched to its elastic limit by a load of 2N.If a 35cm length of the cord is extended 0.6cm by a force

Levart [38]

Explanation:

$from \: hookes \: law \\ F = k.e \\ but \: e = 0.6 \: cm \\ 2 = k \times 0.6 \\ k = 3.33 \\ when \:F \: is \: 2.5 \\ 2.5 = 3.33 \times e {}^{.} \\ {e}^{. } = 0.75 \: cm \\ new \: length = 35 - {e}^{.} \\ = 35 - 0.75 \\ = 34.25 \: cm$

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3 years ago

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klemol [59]

Answer:

Explanation:

the n value must always be greater than the l value

8 0

3 years ago

Calculate the mass (in grams) of 250mL of ether at 25 oC. The density of

leonid [27]

Volume=250mL
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$\boxed{\sf Density=\dfrac{Mass}{Volume}}$

$\\ \sf{:}\implies Mass=Density(Volume)$

$\\ \sf{:}\implies Mass=0.71(250)$

$\\ \sf{:}\implies Mass=177.5g$

6 0

2 years ago

Which half-reaction correctly shows the oxidation of iron

pishuonlain [190]

Answer:

What is the oxidation half reaction for iron?

The two elements involved, iron and chlorine, each change oxidation state; iron from +2 to +3, chlorine from 0 to -1. There are then effectively two half-reactions occurring. These changes can be represented in formulas by inserting appropriate electrons into each half-reaction: Fe2+ → Fe3+ + e.

Hope this helps..

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3 years ago