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olga_2 [115]
3 years ago
14

Which substance contains only 1 kind of atom

Chemistry
2 answers:
Nataliya [291]3 years ago
8 0
Elements are substances that contain only 1 kind of atom.
Marizza181 [45]3 years ago
6 0

Answer:a chemical element

Explanation:a chemical element because i looked it up on google

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What did organizing information on the periodic table reveal?
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The groupings of elements in the periodic table reveal various trends, present in groups such as the alkali metals and noble gases, or the lanthanides and actinides. The periodic table can be used to find information on elements or predict the properties of as-of-yet undiscovered elements.

Explanation:

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Answer:

21.6 g

Explanation:

The reaction that takes place is:

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First we<u> convert the given masses of both reactants into moles</u>, using their <em>respective molar masses</em>:

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0.6 moles of CH₄ would react completely with (2 * 0.6) 1.2 moles of O₂. As there are more O₂ moles than required, O₂ is the reactant in excess and CH₄ is the limiting reactant.

Now we <u>calculate how many moles of water are produced</u>, using the <em>number of moles of the limiting reactant</em>:

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Finally we<u> convert 1.2 moles of water into grams</u>, using its <em>molar mass</em>:

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2 years ago
Why is it important that there is only a small amount of water in the beaker
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We need to first add both of the solution volumes together 35+115=150. Now we can divide the volume of the ethanol by the total volume 35/150=.233. To double check we can multiply the total volume by the percentage of ethanol by volume we got as a solution 150x.233=35. So the percentage by volume of ethanol in the solution is .233x100=23.3%.
3 0
3 years ago
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