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Lubov Fominskaja [6]
3 years ago
14

Everyone in Mrs. Blaylock's science class must perform an experiment for the science fair this year. To begin this process, Mrs.

Blaylock asks her students to brainstorm four different questions that they could study.
One of Mrs. Blaylock's students writes down the following questions.
How does the mass of a toy car affect its speed down a ramp?

How does the position of the Sun, moons, planets and stars affect a person's personality traits and daily behavior patterns?

Which type of pan - copper, aluminum, or glass - heats up the quickest?

Which type of chemicals can remove the cell wall of a plant cell?
Which of the above questions cannot be answered through a scientific investigation?
Chemistry
1 answer:
sergey [27]3 years ago
6 0

Answer:

  • <u>Second choice: </u><em><u>How does the position of the Sun, moons, planets and stars affect a person's personality traits and daily behavior patterns?</u></em>

<u></u>

Explanation:

Science or scientific investigations deal with objective phenomena; this is phenomena which can be described by using objective measurements.

The effect of the position of the Sun, moons, planets and stars on a person's personality and daily behavior patterns is not a scientific question because none scientific field deals with that kind of questions.

Only, a pseudoscience, this is a set of beliefs that have not been scientifically proved, may deal with a question about the effect of the position of some heavenly objects can affect a person's personality traits and daily behavior of patterns.

On the other hand, the aspects deal with in the other questions (the mass of a toy car, the speed down a ramp, the heating from different type of pans, how different type of chemicals remove the cell wall of a plant cell) are measurable and testable (falsifiable), which make them objects of science (like physics, chemistry, and biology)

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nevsk [136]

Explanation:

To convert moles to particles or grams to particles, let us have a firm understanding of what a mole is.

A mole is the unit of measuring quantity of particles.

It is the amount of substance that contains the Avogadro's number of particles.

The particle can be atoms, molecules, formula units, electrons, protons, neutrons, etc.

 So, to convert from moles to particles;

    1 mole of a substance  contains 6.02 x 10²³ particles

To convert from grams to particles;

  First convert to moles;

        number of moles  = \frac{mass}{molar mass}  

  So,    1 mole of a substance  contains 6.02 x 10²³ particles

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3 years ago
For the reaction below, if the rate of appearance of Br2 is 0.180 M/s, what is the rate of disappearance of
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Explanation:

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3 years ago
Popeye wants to make a dilute spinach solution for Sweetpea's bottle. How much 3.0 M spinach solution should he add to the 500.0
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Answer : The volume of 3.0 M spinach solution added should be, 50 mL

Explanation :

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M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the initial molarity and volume of spinach solution.

M_2\text{ and }V_2 are the final molarity and volume of diluted spinach solution.

We are given:

M_1=3.0M\\V_1=?\\M_2=0.30M\\V_2=500.0mL

Now put all the given values in above equation, we get:

3.0M\times V_1=0.30M\times 500.0mL\\\\V_1=50mL

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8 0
4 years ago
Write a balanced equation for its combustion reaction.
laila [671]
<h3>Answer:</h3>

C₅H₁₂O(l)+15/2O₂(g)→5CO₂(g)+6H₂O(l)

<h3>Explanation:</h3>

The balanced chemical equation for the combustion of the hydrocarbon in question is;

C₅H₁₂O(l)+15/2O₂(g)→5CO₂(g)+6H₂O(l)

  • A balanced chemical equation is one in which the number of atoms of each element is equal on both sides of the equation.
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  • Product side has; 5 carbon atoms, 12 hydrogen atoms and 16 Oxygen atoms
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  • An equation is balanced so as to obey the law of conservation of mass.
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