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olchik [2.2K]
3 years ago
14

Question 1. Considering the reaction of the decomposition of N2O5 to form the products NO2 and O2, calculate the average reactio

n rate if at 0.00s the concentration of N2O5 was 1.00 M and at 4.00s it decreases to 0.987 M?
2 N2O5 4 NO2 + O2
4.97 × 10-1 mol/(L × s)
7.27 × 10-2 mol/(L × s)
6.50 × 10-3 mol/(L × s)
3.25 × 10-3 mol/(L × s)
Question 2. What is the oxidation number of sulfur (S) in sulfuric acid (H2SO4)?
-6
+2
+4
+6
Chemistry
2 answers:
GalinKa [24]3 years ago
7 0
<span>
 </span><span> average reaction rate </span><span>= change in concentration / change in time
by putting values we have

 = (1.00M - 0.987M) / (4.00s - 0.00s)
 = 3.25x10^-3 mol/Lsec
this is our conclusion
hope this helps</span>
zepelin [54]3 years ago
4 0

question 2. answer is +4 i took the test

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The mass difference between a nucleus and its constituent nucleons is called the mass defect.
For Ni ( 62 over 28 ): Mass of the protons: 28 · 1.00728 amu = 28.20384 amu
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E = 0.585218 · ( 2.9979 · 10^8 m/s )² · 1 / (6.022 · 10^23) · 1 kg / 1000 g =
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Room temperature is approximately 20°C for scientific purposes. A hot pan on a stove can reach temperatures up to about 260°C. G
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The melting points of sugar and salt are above 20°C.

<h3>What is melting point?</h3>

The melting points of substances refer to the temperature at which solid substances gain enough energy to become liquids.

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More specifically, sugar will melt around 180 °C while salt will melt at a temperature slightly above 800 °C.

More on melting points can be found here: brainly.com/question/25777663

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