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Fynjy0 [20]
3 years ago
14

Chris investigates the conservation of mass during a chemical reaction. He measures the mass of the reactants before the reactio

n, and the mass of the products afterward. He then shares his results with Garett. Garett says that the experiment was not valid. Which of the following would be best for Chris to validate his results?
Repeat the experiment several times to make sure the results are reliable.

Use different compounds for the reaction so the experiment will proceed faster.

Publish his findings in a scientific journal so that other scientists can easily read his results.

Start the experiment with a different mass to make sure that the law of conservation of mass is observed.
Chemistry
1 answer:
seraphim [82]3 years ago
8 0

Answer:

Repeat the experiment several times to make sure the results are reliable.

Explanation:

The best way for Chris to validate his results is to repeat the experiment several times to make sure the results are reliable.

For a hypothesis to be accepted it must be testable.

  • The more standard data points obtained from an experiment, the more the reliability index increases.
  • Chris should not just conclude with one data point.
  • In fact, most scientist prefers to use up to 30 data points before reliability can be assumed.
  • So, Chris should repeat the experiment as much as possible to make sure the results are reliable.
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Identify the three types of metamorphism.
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Identify the change in state that does NOT have an increase in entropy. Identify the change in state that does NOT have an incre
Lena [83]

Answer:

condensing water

Explanation:

Entropy refers to the level of disorderliness in a system. The entropy of liquids is greater than that of solids. The entropy of gases is greater than that of liquids.

A process of physical change involving a change of state from solid to liquid or liquid to gas is accompanied by increase in entropy.

However, a change of state involving a change from liquid to solid or gas to liquid is accompanied by decrease in entropy.

Hence, steam condensing to water leads to decrease and not increase in entropy of the system.

4 0
3 years ago
For each of the following solutions, calculate [OH- ] from [H3O + ] or [H3O + ] from [OH- ]. Classify each solution as acidic, b
Yuri [45]

The case is acidic since calculated pH is below 7 that is 2.3

The hydroxide and hydrogen ion levels in a solution are the sources for calculating pOH and pH levels, respectively, and are the basis of whether a solution is acidic or basic

[H₃O+]=5.3×10⁻³M

To determine the hydroxide ion concentration, we use:

[OH−][H3O+]=1×10⁻¹⁴

We isolate the hydroxide ion concentration:

[OH−]=1×10−145.3×10⁻³M

Solving this, we obtain:

[OH−]=1.9×10−¹²M

We can determine whether the solution is acidic or basic by calculating the pH level:

pH=−log[H3O+]

We substitute in the hydronium ion concentration given:

pH=−Log(5.3×10−3)pH=2.3

Since the pH is below 7, the solution is acidic

Learn more about hydroxide ion here-

brainly.com/question/25883474

#SPJ4

4 0
2 years ago
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