Atomic mass is the number of protons + number of neutrons. 11 protons + 12 neturons = 23
The number of moles of oxygen (O2) required to completely react with 27.4 mol of H2 is 13.7 moles.
<h3>How to calculate number of moles?</h3>
The number of moles of a substance can be calculated using stoichiometry as follows:
The following balanced chemical equation is given as follows:
2H2 + O2 = 2H2O
According to this question, 2 moles of hydrogen gas (H2) reacts with 1 mole of oxygen gas (O2).
This means that 27.4 moles of hydrogen gas (H2) will react with 27.4/2 = 13.7moles of oxygen gas.
Therefore, the number of moles of oxygen (O2) required to completely react with 27.4 mol of H2 is 13.7 moles.
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The answer is true. One neutral atom of carbon has four valence electrons.
An easy way of finding out is to check out the periodic table and look at which main number group the element is in. Carbon is in group number four, which would mean it has four valence electrons.
Hope I was able to help!
Answer:
b) Thermally conductive
Explanation:
Few properties of metals are:
- Metals are hard except metals, sodium and potassium.
- Metals are good conductors of heat and electricity as they have free electrons.
- All metals are solids at the room temperature except mercury.
- Metals have high malleability and ductility.
Hence, correct options is B. The rest are not properties of metals.
