The atomic mass is measured in "atomic mass units" (amu). One mole of an element weighs the same atomic mass number, but in grams.
For example, carbon, C, has an atomic mass of 12.011 amu. One mole of carbon has a mass of 12.011 grams.
Answer:
0
Explanation:
pure elements will always possess an oxidation number of 0, regardless of their charge.
Answer: temperate grasslands if wrong sorry
Explanation:
A thermal insulator because it would keep the heat in
Answer:
C₁₀H₁₂
Explanation:
90.8% of basketane (Hydrocarbon, contains only C and H) is Carbon, and 100-90.8 = 9.2% of the mass is hydrogen.
The molar mass is between 130-140g/mol, That means the moles of Carbon (Using its molar mass, 12.01g/mol) that are in basketane are between:
140g/mol /12.01g/mol *90.8%= 10.58 moles of C.
130g/mol / 12.01g/mol *90.8%= 9.83 moles of C.
As the moles of carbon must be given in a whole number, There are 10 moles of Carbon.
10 moles C * (12.01g / mol) = 120.1g/mol that are 90.8% of the molar mass. Molar mass of basketane is:
100% * (120.1g/mol / 90.8%) =
132.3g/mol.
The part of the molar mass due hydrogen must be:
132.3 g/mol - 120.1g/mol = 12.2 g/mol
As molar mass of hydrogen is 1g/mol, the moles of hydrogen are 12
And molecular formula is:
<h3>C₁₀H₁₂</h3>
