Answer:
The "2" applies only to the sodium, and sugar is a substance
Explanation:
The amount of atoms in an element are written using small letters after the element they refer to.
Answer:
Actually, we can answer the problem even without the first statement. All we have to do is write the reaction for the production of sulfur trioxide.
2 S + 3 O₂ → 2 SO₃
The stoichiometric calculations is as follows:
6 g S * 1 mol/32.06 g S = 0.187 mol S
Moles O₂ needed = 0.187 mol S * 3 mol O₂/2 mol S = 0.2805 mol O₂
Since the molar mas of O₂ is 32 g/mol,
Mass of O₂ needed = 0.2805 mol O₂ * 32 g/mol = 8.976 g O₂
Answer:
1. chemical property
2. chemical property
3. chemical change
4. physical change
5. physical property
6. chemical change
7. chemical change
8. chemical property
9. physical property
10. physical property
11. physical change
12. chemical change
13. chemical change
14. chemical change
15. true
16. true
17. false
18. true
19. false
20. true
21. chemical change
22. physical change
23. chemical change
24. chemical change
Explanation:
Like it says in the worksheet, for questions 1-14, you can tell the difference between a property and change by whether there is a verb in the description.
If the object is simply changing form (melting, freezing), it is a physical change or property. The object can be returned to the state it was in originally without much difficulty. You can freeze water and turn it into ice. You can just as easily melt the ice and turn it into water again.
If the object is actually changing its composition or a reaction is taking place (baking bread, combustion), it is a chemical change or property. It is not as easy and sometimes even impossible to change back to its original state. If you have a bike that is rusted, you cannot really do much to change it back to how it was before it got rusty.
Hope this helps! <3
A. Noble gases are the chemical elements in group 18 of the periodic table.
B. Noble gas configuration is the electron configuration of noble gases.
C. Noble gases abbreviates large portions of the configuration.
