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3 years ago

Which process occurs at the anode in an electrochemical cell?

1 answer:

5 0

The process that occurs at the anode in an electrochemical cell is the loss of electrons. The answer is number 2. Oxidation occurs as electrons are lost at the anode at one of the electrodes in both an electrolytic cell and a voltaic cell.

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you have 30.0 grams of a chemical element. After a certian amount of time, you have 3.75 grams remaining. How many half lives ha

Salsk061 [2.6K]

Explanation:

The chemical elements goes from 30g to 15g to 7.5g to 3.75g.

Therefore, it has gone through 3 half lives.

5 0

3 years ago

The second-order rate constant for the following gas-phase reaction is 0.041 1/MLaTeX: \cdotâs. We start with 0.438 mol C2F4 in

pantera1 [17]

Answer:

134.8 seconds is the half-life (in seconds) of the reaction for the initial $C_2F_4$ concentration

Explanation:

Half life for second order kinetics is given by:

$t_{\frac{1}{2}=\frac{1}{k\times a_0}$

Integrated rate law for second order kinetics is given by:

$\frac{1}{a}=kt+\frac{1}{a_0}$

$t_{\frac{1}{2}$ = half life

k = rate constant

$a_0$ = initial concentration

a = Final concentration of reactant after time t

We have :

$C_2F_4 \longrightarrow \frac{1}{2} C_4F_8$

Initial concentration of $C_2F_4=[a_o]=\frac{0.438 mol}{2.42 L}=0.1810 mol/L$

Rate constant = k = $0.041 M^{-1} s^{-1}$

$t_{\frac{1}{2}=\frac{1}{k\times a_0}$

$=\frac{1}{0.041 M^{-1} s^{-1}\times 0.1810 mol/L}$

$t_{1/2}=134.8 s$

134.8 seconds is the half-life (in seconds) of the reaction for the initial $C_2F_4$ concentration

3 0

3 years ago

A scientist hypothesizes that fertilizer containing 10 percent nitrogen will produce tomato plants with more leaves and blossoms

gogolik [260]

The correct answer is - A- Amount of nitrogen in fertilizer.

The independent variable, in mathematical terms, is the variable whose variation is not dependent on the variations of the another variables.

In this case, the independent variable will be the amount of nitrogen in the fertilizer, as it is not dependent on any other variable. Also, apart from not being dependent on other variables, it is a variable on which the other variables are dependent, which in this case will be the amount of leaves and the amount of blossoms on the tomato plant.

6 0

4 years ago

Which bond is least polar? As-Cl, Bi-Cl, P-Cl, N-Cl

Lady_Fox [76]

Uhh don't know about that

3 0

3 years ago

Which of the following is an example of matter? Question 5 options: A) The air around you B) Your thoughts C) Radio waves D) Hea

zalisa [80]

Answer:

the air around you

Explanation:matter is physical like the particles in the air or the oxygen in the air. so rocks, earth the sun, anything you can touch is matter. even gasses.

7 0

4 years ago