Two examples of chemical change in common items are - wood burning and rust forming on a nail due to oxidation.
Alloys are mixtures of metals and other elements, which still keeps many characteristics of metal.
Alloys are sometimes desirable as they have some properties that the original metals don't, for example more flexibility or less fragility. Steel is such an alloy: it prevents movement of iron parts, making it stronger.
When hydrogen atoms are energized by electricity, an emission spectrum of specific colors occurs because of the different wavelengths.
The density of the product gas mixture is 5.39 g/L
Explanation:
<u>Given:</u>
Temperature after the reaction =
C
Pressure in the container = 1.65 atm
The ideal gas equation PV = nRT
<u>To find:</u> Density of the product gas mixture
<u>Step 1:</u>
Molarity (M) = P/(RT)
![\[M=\frac{P}{R T}\]$M=\frac{1.65 \mathrm{atm}}{\left(0.08206 \frac{L \cdot a t m}{m o l . K}\right)(298.15 K)}$](https://tex.z-dn.net/?f=%5C%5BM%3D%5Cfrac%7BP%7D%7BR%20T%7D%5C%5D%24M%3D%5Cfrac%7B1.65%20%5Cmathrm%7Batm%7D%7D%7B%5Cleft%280.08206%20%5Cfrac%7BL%20%5Ccdot%20a%20t%20m%7D%7Bm%20o%20l%20.%20K%7D%5Cright%29%28298.15%20K%29%7D%24)
M = 0.0674 mol/L
<u>Step 2: </u>
The product of the given reaction is
. Its molar mass is
1S x 32.066 g/mol = 32.066 g/mol
3O x 16 g/mol = 48 g/mol
Adding both we get 80.066 g/mol
Therefore the density of the product gas mixture is 
= 5.39 g/L