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vitfil [10]
1 year ago
13

True/false... A molecule makes up a compound explain

Chemistry
1 answer:
lana66690 [7]1 year ago
6 0

Answer: True

Explanation:

I answered your other one and its bascily  the same thing a molecule made of atoms from different elements. All compounds are molecules, but not all molecules are compounds. ... There are two main types of chemical bonds that hold atoms together: covalent and ionic/electrovalent bonds. Atoms that share electrons in a chemical bond have covalent bonds.

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sugar and oxygen

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Two atoms with the same number of protons but a different number of neutrons are (2 points)
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The combustion of hydrogen-oxygen mixtures is used to produce very high temperatures (ca. 2500 °C) needed for certain types of w
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Answer:

1360kJ are evolved

Explanation:

When 1mole of H2 reacts with 1/2 moles O2 producing 1 mole of water and 241.8kJ.

To solve this question we need to find the limiting reactant knowing were added 90g of H2 and 90g of O2 as follows:

<em>Moles H2 -Molar mass: 2g/mol-</em>

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<em>Moles O2 -Molar mass: 32g/mol-</em>

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For a complete reaction of 2.81 moles of O2 are needed:

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As there are 45 moles, H2 is the excess reactant and O2 the limiting reactant.

As 1/2 moles O2 produce 241.8kJ, 2.81 moles will produce:

2.81 moles O2 * (241.8kJ / 1/2moles O2) =

<h3>1360kJ are evolved</h3>
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2 years ago
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