Answer:
Mass = 2.12 g
Explanation:
Given data:
Volume of KMnO₄ = 255 mL (255/1000 = 0.255 L)
Molarity = 0.0525 M
Mass in gram = ?
Solution:
First of all we will calculate the number of moles.
<em>Molarity = number of moles of solute / volume in litter</em>
0.0525 M = number of moles of solute / 0.255 L
Number of moles of solute = 0.0525 M ×0.255 L
Number of moles of solute = 0.0134 mol
Mass in gram:
<em>Number of moles = mass/ molar mass</em>
Mass = moles × molar mass
Mass = 0.0134 mol × 158.04 g/mol
Mass = 2.12 g
Answer:
Gas
Explanation:
Legend primordial element element by radioactive decay Atomic number color: red=gas
Answer:
Yield of CO₂ = 79.1 %
Explanation:
This is the balanced reaction:
CaCO₃ (s) + 2HCl (aq) → CO₂ (g) + CaCl₂ (aq) + H₂O (l)
As the hydrochloric acid is in excess, the limiting reactant is the CaCO₃.
Let's convert the mass to moles
10.9 g / 100.08 g/mol = 0.109 moles
Ratio is 1:1, so 0.109 moles of CaCO₃ will produce the same amount of CO₂.
Let's determine the mass
0.109 moles of CO₂ . 44 g/mol = 4.79 g
Now, we can determine the yield
(yeild produced / theoretical yield) . 100 =
(3.79 / 4.79) . 100 = 79.1%
Air pollution can aggravate the medical conditions of individuals with asthma and emphysema. Effects can include chronic respiratory disease, lung cancer, heart disease, and even damage to the brain, nerves, liver, or kidneys.
To avoid air pollution:
Reduce the number of trips you take in your car.
Reduce or eliminate fireplace and wood stove use.
Avoid burning leaves, trash, and other materials.
Avoid using gas-powered lawn and garden equipment.
Answer:
oxygen reacts with glucose to produce carbon dixiode into water and release energy. It is 1
Explanation:
