3 years ago

Is steel wool an element,compound,or mixture

2 answers:

7 0

Is iron an element compound or mixture?

Of course Element. Iron = Fe It cannot be separated by physical or chemical means and hence is an element Mixtures can be separated by physical means and compound by chemical means

4vir4ik [10]3 years ago

5 0

Steel wool is neither, but it is mixture of iron with carbon.

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The rate constant for the second-order reaction 2NOBr(g) ¡ 2NO(g) 1 Br2(g) is 0.80/M ? s at 108C. (a) Starting with a concentrat

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(a)

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(b)

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Hello,

(a) In this case, as the reaction is second-ordered, one uses the following kinetic equation to compute the concentration of NOBr after 22 seconds:

$\frac{1}{[NOBr]}=kt +\frac{1}{[NOBr]_0}\\\frac{1}{[NOBr]}=\frac{0.8}{M*s}*22s+\frac{1}{0.086M}=\frac{29.3}{M}\\$

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Therefore, for the given initial concentrations one obtains:

$t_{1/2}=\frac{1}{\frac{0.80}{M*s}*0.072M}=17.36s\\t_{1/2}=\frac{1}{\frac{0.80}{M*s}*0.054M}=23.15s$

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