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3 years ago

HURRY I WILL GRANT 100 PTS AND BRAINLIEST

Chemistry

1 answer:

Zanzabum3 years ago

4 0

Answer:

Occurs when a scientists expectations change how the results of an experiment are viewed Constant In an experiment, a variable that does not change when other variables change.

Explanation:

A hypothesis (plural hypotheses) is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories. Even though the words "hypothesis" and "theory" are often used synonymously, a scientific hypothesis is not the same as a scientific theory. A working hypothesis is a provisionally accepted hypothesis proposed for further research, in a process beginning with an educated guess or thought.

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what is the chemical formula of (Sodium hydroxide ) ??

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2 years ago

What activates a convection current, starting the flow of a fluid ??

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Predict the number of peaks that you would expect in the proton-decoupled 13C spectrum of each comound.

dangina [55]

Answer:

To interpret a 13C-NMR spectrum we will use some standards very simple. A 13C-NMR spectrum gives us the following information:

1. Indicates the number of non-equivalent carbons in the molecule.

2. Measuring the chemical shift we can intuit the environment

electronic and determine the next functional groups.

3. In this case we cannot count on integration since the different

carbons have different relaxation times.

The number of peaks in the spectrum indicates the number of types of carbon present in the analyzed substance.

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electronegativity of carbon bound groups
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Explanation:

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3 years ago

You have 40 g of a radioisotope. If the half-life of this radioisotope is 4 days, how many grams will remain after 12 days?

anygoal [31]

With reference to radioactive material, half-life is the time required to 50% depletion of initial amount of material.

Given: Initial amount of radioactive material = 40 g
Half life = 4 days.

Therefore, After 4 days, amount of compound left = 40/2 = 20 g
After 8 days, i.e 2 half-life, amount of compound left = 20/2 = 10 g
Finally after 12 days, i.e. 3 half-life, amount of compound left = 10/2 = 5 g

Thus, 5 <span>grams will remain after 12 days</span>

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3 years ago