Iron has the chemical formula Fe from its Latin name, ferrum. Its atomic number is 26, and its molar mass is 55.845 grams per mole. It has a metallic gray color and is attracted to magnets. Iron is the second most-abundant metal on Earth.

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Which of the following values would you expect for the ratio of half-lives for a reaction with starting concentrations of 0.05M

harkovskaia [24]

Answer:

The expected ratio of half-lives for a reaction will be 5:1.

Explanation:

Integrated rate law for zero order kinetics is given as:

$k=\frac{1}{t}([A_o]-[A])$

$[A_o]$ = initial concentration

[A]=concentration at time t

k = rate constant

if, $[A]=\frac{1}{2}[A_o]$

$t=t_{\frac{1}{2}}$ , the equation (1) becomes:

$t_{\frac{1}{2}}=\frac{[A_o]}{2k}$

Half life when concentration was 0.05 M= $t_{\frac{1}{2}}$

Half life when concentration was 0.01 M= $t_{\frac{1}{2}}'$

Ratio of half-lives will be:

$\frac{t_{\frac{1}{2}}}{t_{\frac{1}{2}}'}=\frac{\frac{[0.05 M]}{2k}}{\frac{[0.01 M]}{2k}}=\frac{5}{1}$

The expected ratio of half-lives for a reaction will be 5:1.

6 0

3 years ago

6)<br> How many moles are in 98.3 grams of aluminum?

8090 [49]

Answer:

1.26

Explanation:

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Conversion factors are useful in solving problems in which a given measurement must be expressed in

spin [16.1K]

Conversion factors are useful in solving problems in which a given measurement must be expressed in some other units of measure.

Conversion factors are helpful in solving issues where one unit of measurement needs to be expressed in another. In general, a measurement's numerical value changes when it is multiplied by a conversion factor, while the quantity being measured's real size stays the same.
A conversion factor is a number that is used to multiply or divide one set of units into another. If a conversion is required, it must be done using the correct conversion factor to get an identical value. For instance, 12 inches equals one foot when converting between inches and feet.

To learn more about Conversion factors please visit -brainly.com/question/23510660
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2 years ago