The pressur in side increases alot because the air has gon down and the temp will increse
Answer:
67.5% ≅ 67.6%
Explanation:
Given data:
Mass of water = 17.0 g
Mass of oxygen produced (actual yield)= 10.2 g
Percent yield of oxygen = ?
Solution:
Chemical equation:
2H₂O → 2H₂ + O₂
Number of moles of water:
Number of moles = mass/ molar mass
Number of moles = 17.0 g/ 18.016 g/mol
Number of moles = 0.944 mol
Now we will compare the moles of oxygen with water to know the theoretical yield of oxygen.
H₂O : O₂
2 : 1
0.944 : 1/2×0.944 = 0.472 mol
Mass of oxygen:
Mass = number of moles× molar mass
Mass = 0.472 mol × 32 g/mol
Mass = 15.104 g
Percent yield:
Percent yield = [Actual yield / theoretical yield] × 100
Percent yield = [ 10.2 g/ 15.104 g] × 100
Percent yield = 0.675 × 100
Percent yield = 67.5%
Answer:
C
Explanation:
Na has an electron configuration of 2,8,1
it forms an ion by losing 1 electron thus gaining a 1+ charge
A pizza was made and 5 leftovers!
The number of atoms present in 80.156 grams of Ca is 1.204×10²⁴ atoms
<h3>Avogadro's hypothesis </h3>
From Avogadro's hypothesis,
1 mole of Ca = 6.02×10²³ atoms
But
1 mole of Ca = 40.078 g
Thus,
40.078 g of Ca = 6.02×10²³ atoms
<h3>How to determine the atoms in 80.156 g of Ca</h3>
40.078 g of Ca = 6.02×10²³ atoms
Therefore,
80.156 g of Ca = (80.156 × 6.02×10²³) / 40.078
80.156 g of Ca = 1.204×10²⁴ atoms
Thus, 1.204×10²⁴ atoms is present in 80.156 g of Ca.
Learn more about Avogadro's number:
brainly.com/question/26141731
