Answer:
Physical changes are when the object can be returned back into their original form. Chemical changes are when the object gets changed and can't get reversed.
Explanation:
1-physical
2-physical
3-physical
4-chemical
5-chemical
6-chemical
7-physical
8-chemical
9-chemical
10-chemical
Answer:
The smallest tiny particles of matter which can't be divided further is called atom, i.e., an atom is the smallest building block of matter. For example: Sodium (Na), Hydrogen (H), Oxygen (O), etc.
Answer:
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Answer:
Balance chemical equation is
O2(g) + 2H2(g) --> 2H20(g)
a. 0.20 mol 02 --> 0.225mol H20
b. 0.30 mol H2 --> 2.7mol H20