Answer:
C.
Explanation:
We are given that
Initial concentration,
First half life, minutes
Second half life, minutes
We have to find K.
The given reaction is zero order reaction.
We know that for zero order reaction
Using the formula
Hence, option C is correct.
I would go with taste sour just because lemon is considered as acid
Nickel has 10 valence electrons.
I'm not absolutely positively sure of this. I'm only about 99.5% sure.
I'm going to say that it's a chemical change.
Why ?
When a physical change occurs, the properties and characteristics of
the substance stay the same ... like crushing a rock, or boiling water.
In this experiment, you started with water. Water is a single substance,
and its boiling point is +100°C.
After the change, you suddenly have TWO substances.
Their boiling points are <span>-183°C and -253°C .
It's plain to see that the characteristics and properties of the
new substances are nothing like the original substance.
Yep. I convinced myself. It's definitely a chemical change.
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It’s an element because elements are a form of pure substance.