When vinegar was added to baking soda, A new product is formed as foam. Hence, it is s a chemical change.
<h3>What is chemical change ?</h3>
A chemical change results from a chemical reaction forming new products while a physical change is when matter changes forms but not chemical identity.
Foam up with carbon dioxide gas,all of baking soda can be made react and disappear into vinegar solution and thus chemical reaction completes.
Hence, When vinegar was added to baking soda, A new product was formed Hence, it is s a chemical change.
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Answer:
The temperature is the same overtime.
Explanation:
Since the line on the graph is straight the temperature will be constant.
Answer:
V = 16.3 L
Explanation:
Given data:
Volume of oxygen needed = ?
Temperature = standard = 273 K
Pressure = standard = 1 atm
Volume of sulfur trioxide = 32.6 L
Solution:
Chemical equation:
2SO₂ + O₂ → 2SO₃
Number of moles of SO₃:
PV = nRT
1 atm × 32.6 L = n×0.0821 atm.L/mol.K ×273 K
32.6 atm.L =n× 22.41 atm.L/mol
n = 32.6 atm.L / 22.41 atm.L/mol
n = 1.45 mol
now we will compare the moles of oxygen with sulfur trioxide.
SO₃ : O₂
2 : 1
1.45 : 1/2×1.45 = 0.725 mol
Volume of oxygen:
PV = nRT
1 atm × V = 0.725 mol×0.0821 atm.L/mol.K ×273 K
V = 16.25 atm.L /1 atm
V = 16.3 L