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lys-0071 [83]
1 year ago
11

How many significant figures are in this number? 43.55

Chemistry
1 answer:
leva [86]1 year ago
7 0

Answer:

4 significant figures

Explanation:

Significant figures are the units/digits within a number that make the number more accurate and precise.

All digits (except for 0) are always significant. Therefore, all the digits in 43.55 are significant. Since there are 4 digits in the given number, there are 4 significant figures.

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Determine the energy in joules of a photon whose frequency is 3.55 x10^17 hz
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The equation for energy of a photon is E=hv where v equals frequency and h equals the Planck constant (6.626X10^-34). So since you've been given frequency you can just plug in frequency to find the total energy in joules.

E=(3.55X10^17)(6.626X10^-34)
E=2.35223X10^-16

Not sure how many significant figures you needed. Hope this helped.


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Explanation:

A strip of solid palladium metal is put into a beaker of nicl2

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To answer this question properly you must refer to the reactivity series.

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