Answer:
The atomic mass of this element would be 12 amu
Explanation:
The subatomic particles provide several bits of information about a given element.
The number of protons is equal to the atomic number of the element. For this element having 6 protons makes the atomic number 6 and makes the element Carbon.
The number of protons plus the number of neutrons equals the atomic mass of the element based upon atomic mass units (amus)
For this element 6 protons and 6 neutrons combine to make an atomic mass of 12 amus.
Lastly, the values of protons and electrons tell whether the atom is an ion or neutral. When protons equal electrons the atom is neutral. When protons are greater than neutrons the atom is a positive charge or cation. When the protons are less than the electrons the atom is a negative charge or anion. For this example the Carbon atom has 6 protons and 6 electrons making it neutral.
Answer:
0.07 moles of are left over
Explanation:
1. Write down the balanced chemical equation for the combustion of ethanol with oxygen:
2. Find the limiting reagent to know which reagent is left over:
To find the limiting reagent take the number of moles given by the problem and divide this number between the stoichiometric coefficient from the balanced chemical equation. The smallest number will be the limiting reagent.
- For the ethanol :
- For the oxygen:
Therefore, the oxygen is the limiting reagent, that is the ethanol is the compound that will be left over.
3. Find the moles of ethanol left over.
- First calculate how many moles of ethanol reacted with the oxygen:
So 0.08 moles of reacted with the oxygen.
- Then subtract the moles of ethanol that reacted with the oxygen from the total moles of ethanol in the reaction:
are left over.
Answer:
20 atoms are represented (only 4 elements tho)