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Alla [95]
3 years ago
9

What did johann wolfgang döbereiner contribute to the periodic table?

Chemistry
1 answer:
sattari [20]3 years ago
3 0
His work foreshadowed the periodic table. He tried organizing elements into triads, a set of 3 elements with similar properties. In each triad the mean of the lightest and heaviest atomic weight equaled to approximately the atomic weight of the middle element.
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When a radioactive decay occurs what is released?
DochEvi [55]

When a radioactive decay occurs, protons/neutrons, alpha/beta particles and gamma rays are all released depending on the type of decay.

5 0
3 years ago
Will give brainliest to correct answer
sladkih [1.3K]

Answer:

2.5 grams

Explanation:

you can see it on the graph

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In a coffee-cup calorimeter, 50.0ml of 0.100M AgNO3 and50.0ml of 0.100M HCl are mixed to yield the following reaction:
Marina CMI [18]

Answer:

-66.88KJ/mol

Explanation:

It is possible to obtain the heat involved in a reaction using a calorimeter. Formula is:

q = -C×m×ΔT

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Replacing:

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Now, in the reaction:

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Moles that react are:

0.050L× (0.100mol /L) = 0.0050moles

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-334.4J / 0.0050moles = -66880J/mol = <em>-66.88KJ/mol</em>

5 0
3 years ago
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248.72 g/mol

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