Answer:
- blue-black PHYSICAL PROPERTY
- crystalline PHYSICAL PROPERTY
- solid PHYSICAL PROPERTY
- sublimes to a violet-colored gas PHYSICAL PROPERTY
- reacts with aluminum and many other metals CHEMICAL PROPERTY
Explanation:
Chemical properties are visible through chemical reactions, in which the chemical identity changes to form new substances. On the other hand, physical properties are evident without a change in the identity of a substance.
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<em>Which of these five properties are physical and which are chemical?</em>
- blue-black PHYSICAL PROPERTY
- crystalline PHYSICAL PROPERTY
- solid PHYSICAL PROPERTY
- sublimes to a violet-colored gas PHYSICAL PROPERTY
- reacts with aluminum and many other metals CHEMICAL PROPERTY
A reaction that is spontaneous will always happen. Option D is right.
Explanation:
When certain conditions for reactions are fulfilled the reaction that occurs without any outside intervention with the formation of product is called as spontaneous reaction.
In spontaneous reaction the product is of lesser energy than reactants.
The spontaneous reaction leads to increase in entropy. If the entropy of the system and surrounding is positive the reaction is spontaneous.
During phase change as solid to liquid causes molecules to be disordered and increase in the movement causes increase disorder hence increase in entropy and a spontaneous reaction.
In chemical reactions if on mixing the substances heat is released thus entropy increases. The spontaneous reaction can also occur even if entropy decreases.
The reaction is not spontaneous if Gibb's free energy is negative.
Answer:
Physical
Explanation: Because it says "Until creamy" meaning you're changing the look, not the way it reacts with each other.
You know that an unlabeled water bottle contains at least some water. You measure the freezing point of the unknown substance and find that it freezes at a temperature lower than 0 degrees Celsius at 1 atmosphere pressure, <span>The substance will have a boiling point that is less than 100 degrees Celsius.</span>
1 skeleton equation
Na +O2 =>Na2O
Balanced equation
4Na + O2 =>2 Na2O
2.word equation
Zinc +magnesium phosphide=magnesium + zinc phosphide
Balanced equation
3Zn +Mg3P2 =3Mg+ Zn3p2
3skeleton equation
Al +Br2 =>AlBr3
Balanced equation
2Al +3Br2 => 2AlBr3
4 word equation
Lithium + sulphur =>lithium sulphide
2Li + S => Li2S