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liraira [26]
3 years ago
8

In an investigation with density, Marcia’s teacher measures the mass and volume of 10 different samples of a substance. The samp

les are numbered 1 through 10. Then, the teacher makes the graph that is shown below. What is the independent variable in this investigation? mass volume sample number substance density

Chemistry
2 answers:
valina [46]3 years ago
3 0

Answer:

Mass  

Step-by-step explanation:

Usually, you plot the independent variable along the horizontal (x) axis and the dependent variable along the vertical (y) axis.

Marcia's teacher plotted the mass of the sample along the x-axis and volume along the y-axis.

The mass is the independent variable, because that is <em>what the teacher varied</em>.

The volume is the <em>dependent variable</em>, because it <em>depends</em> on the mass.

Sample number is <em>wrong</em>, because it is not a variable.

Substance is <em>wrong</em>, because all samples consist of the same substance.

Density is <em>wrong</em>, because it is constant. It is the slope of the graph.

emmainna [20.7K]3 years ago
3 0

Answer:mass

Explanation:

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Option a. = 0.01 M

Explanation:

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According to this, the expression to use will be the Nernst equation, and we can assume we are working at 25 °C, therefore, the Nernst equation will be:

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From there, we can solve for Zn later.

First, we need to write the semi equation of oxidation and reduction, and get the standard potential of the cell:

Zn(s) --------> Zn²⁺(aq) + 2e⁻       E₁° = 0.76 V

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Now, let's replace in (1) and then, solve for [Zn]:

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2.21 - 2.12 = -0.0295 log (0.01[Zn])

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