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Triss [41]
3 years ago
8

The variable that a scientist changes when conducting an experiment is called the _____variable.

Chemistry
2 answers:
Flauer [41]3 years ago
6 0
He variable that a scientist changes when conducting an experiment is called the manipulated variable
vaieri [72.5K]3 years ago
4 0

Answer: The correct answer is option (a).

Explanation:

Dependent variables are the variables whose value depend on another variable. Its value changes as the independent variable changes.

Independent variables are the variables which do not depend on any other variable beside . Its value does not change with a change in other dependent  variables.

While conducting experiment scientist changes dependent variable in order to record observations.

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A certain sample of coal contains 1.60 percent sulfur by mass. when the coal is burned, the sulfur is converted to sulfur dioxid
alina1380 [7]
<span>1.40 x 10^5 kilograms of calcium oxide The reaction looks like SO2 + CaO => CaSO3 First, determine the mass of sulfur in the coal 5.00 x 10^6 * 1.60 x 10^-2 = 8.00 x 10^4 Now lookup the atomic weights of Sulfur, Calcium, and Oxygen. Sulfur = 32.065 Calcium = 40.078 Oxygen = 15.999 Calculate the molar mass of CaO CaO = 40.078 + 15.999 = 56.077 Since 1 atom of sulfur makes 1 atom of sulfur dioxide, we don't need the molar mass of sulfur dioxide. We merely need the number of moles of sulfur we're burning. divide the mass of sulfur by the atomic weight. 8.00 x 10^4 / 32.065 = 2.49 x 10^3 moles Since 1 molecule of sulfur dioxide is reacted with 1 molecule of calcium oxide, just multiply the number of moles needed by the molar mass 2.49 x 10^3 * 56.077 = 1.40 x 10^5 So you need to use 1.40 x 10^5 kilograms of calcium oxide per day to treat the sulfur dioxide generated by burning 5.00 x 10^6 kilograms of coal with 1.60% sulfur.</span>
5 0
3 years ago
Check my answer?
rusak2 [61]
Yes that is correct because hypotheses should be testable meaning it can be proven wrong and it has to be reasonable meaning it should make sense. 
8 0
3 years ago
Read 2 more answers
What does it mean for heat to be transferred by radiation?
iris [78.8K]

Answer:

Here's what I get  

Explanation:

It means that the heat comes directly at you without relying  on any material to conduct it.

For example, you feel the heat from a campfire even if the wind is blowing crosswise to you and the fire.

5 0
3 years ago
How do the ionic radii vary within a group of non-metals?
stellarik [79]

Answer: Ionic radii is half the distance between two ions.

Explanation: from top to bottom down an element group, ionic radius increases. This is because a new electron shell is added as you move down the periodic table.

Might Be wrong not sure :)

8 0
3 years ago
Look at the image pls. The question is there
ira [324]

Answer:

Look at the image pls. The question is there

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4 0
3 years ago
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