Answer:
0.736
Explanation:
*I am not sure what you mean by "carbon tetrahedral". I'm assuming you are just referring to individual carbon.*
To find the mole percent, you need to (1) convert grams benzene and grams carbon to moles (via their molar masses) and then (2) calculate the mole fraction (via the mole fraction formula).
<u>(Step 1)</u>
Benzene = C₆H₆
Molar Mass (C₆H₆) = 6(12.01 g/mol) + 6(1.008 g/mol)
Molar Mass (C₆H₆) = 78.108 g/mol
70 g C₆H₆ 1 mole
--------------- x ------------------ = 0.896 mole C₆H₆
78.108 g
Molar Mass (C) = 12.01 g/mol
30 g C 1 mole
------------ x ----------------- = 2.50 mole C
12.01 g
<u>(Step 2)</u>
moles solute
Mole Fraction = ----------------------------------------------
moles solute + moles solvent
2.50 mole C
Mole Fraction = ------------------------------------------------- = 0.736
(0.896 mole C₆H₆ + 2.50 mole C)
Water has a higher SHC as it would be cooler than the sand meaning it requires more energy to reach the same temperature
Answer:
<h2>4.99 × 10²³ atoms</h2>
Explanation:
The number of atoms of gold can be found by using the formula
<h3>N = n × L</h3>
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
N = 0.83 × 6.02 × 10²³
We have the final answer as
<h3>4.99 × 10²³ atoms</h3>
Hope this helps you
Answer: No.
Explanation: Unless a disaster happens to their environment their scales will only grow.
