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IRINA_888 [86]
2 years ago
9

a science class is planning an investigation about gravity and objects on earth. i’m three to four sentences, explain the steps

the class should take to provide data to help them make a conclusion about the effect of gravity on objects of different masses.

Chemistry
1 answer:
andrezito [222]2 years ago
6 0

The students in the class should take the necessary steps to produce an effective experiment according to the scientific method.

<h3>What are the steps to produce an experiment?</h3>

The steps the student should take include:

  • Formulate a hypothesis.
  • Design an experiment to test the hypothesis.
  • Perform the experiment.
  • Gather data from the results.
  • Compare data with one another and come to a conclusion.

Therefore, we can confirm that by following these steps in regard to performing an experiment, the students will be able to reach a conclusion on the effect of gravity on different objects.

To learn more about gravity visit:

brainly.com/question/1479537?referrer=searchResults

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TNT is a molecule

Explanation:

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Its minerals will have crystals.
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A crystal is any solid that has an organized structure. ... So it is a prerequisite to be a crystal in order to be a mineral. All minerals, therefore, form crystals. On the other hand, there are crystals that are not minerals, because they are not naturally occuring, or because they are not inorganic

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What is the answer and why
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Nuclear power plant because that is a fission reaction and fusion would melt the power plant
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3 years ago
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What is the Ka of a weak acid (HA) if the initial concentration of weak acid is 4.5 x 10-4 M and the pH is 6.87? (pick one)
rewona [7]

Answer:

Ka = 4.04 \times 10^{-11}

Explanation:

Initial concentration of weak acid = 4.5 \times 10^{-4}\ M

pH = 6.87

pH = -log[H^+]

[H^+]=10^{-pH}

[H^+]=10^{-6.87}=1.35 \times 10^{-7}\ M

HA dissociated as:

HA \leftrightharpoons H^+ + A^{-}

(0.00045 - x)    x     x

[HA] at equilibrium = (0.00045 - x) M

x = 1.35 \times 10^{-7}\ M

Ka = \frac{[H^+][A^{-}]}{[HA]}

Ka = \frac{(1.35 \times 10^{-7})^2}{0.00045 - 0.000000135}

0.000000135 <<< 0.00045

Therefore, Ka = \frac{(1.35 \times 10^{-7})^2}{0.00045 } = 4.04 \times 10^{-11}

5 0
3 years ago
When 1.82 moles of HCL reacts with excess MnO2, how many moles of Cl2 form
s2008m [1.1K]

The balanced reaction is:<span>

MnO2(s) + 4HCl(aq) → Cl2(g) + MnCl2(aq) + 2H2O(l)

We are given the amount of hydrochloric acid to be used for the reaction. This will be the starting point for the calculations.

1.82 mol HCl ( 1 mol Cl2 / 4 mol HCl) = 0.46 mol Cl2

<span>Therefore, 0.46 mol of chlorine gas is produced for the reaction of hydrochloric acid and manganese oxide.</span></span>

5 0
3 years ago
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