Answer:
179.4 g of oyxgen will be produced.
Option 2.
Be careful because the units says L instead of g
Explanation:
Decomposition reaction:
2KClO₃ → 2KCl + 3O₂
2 moles of chlorate can decompose to 2 moles of chloride and 3 moles of oxygen.
We convert the mass to moles, and then we make the rule of three:
458 g / 122.55 g/mol =3.74 moles of chlorate
2 moles of chlorate can produce 3 moles of oxygen
Then, 3.74 moles of chlorate may produce (3.74 .3) / 2 = 5.60 moles of O₂
We convert the moles to mass → 5.60 mol . 32 g / 1mol = 179.4 g
Explanation:
A property that does no change the chemical composition of a substance are known as physical properties.
For example, mass, volume, size etc are all physical properties.
Whereas a property that changes the chemical composition of a substance are known as chemical properties.
For example, reactivity, toxicity etc are all chemical properties.
Therefore, identifying the given statements as follows.
- The various components of a mixture do not combine chemically - physical property.
- Chemical properties can only be observed during a chemical reaction - chemical property.
- The rusting of iron is a chemical reaction - chemical property.
- Melting and boiling points are physical properties - physical property.
Answer:
4 hydrogen atoms are needed to C5H8 to saturate it
Explanation: because C5H8 is an alkyne that contains a triple bond or alkene with 2 double bonds.
2 hydrogen atoms are needed to saturate one double bond and 4 hydrogen atoms are needed to fully Saturate a triple bond or two double bonds.
The most likely answer is the boiling point and freezing point of water. The Celsius scale starts at the freezing point of water (0°C) and than scaled so that 100°C fell on the boiling point of water.
I hope this helps. Let me know if anything is unclear.