The answer to the question is D
Answer:B. A liquid changes to a solid.
Explanation:
A pudding would be considered as solid since the molecules are in an ordered state and they are close to each other which gives definite shape and volume for the pudding. This is also true for the bucketful of sand. Hope this answers the question.
He is making a conclusion from a single observation.
Silver isn’t the only metal that is shiny and has no colour.
For example, lithium, sodium, magnesium, and aluminium all have about the same colour as silver.
Answer:
The answer to your question: I think is letter c
Explanation:
2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)
a.- Precipitation: is incorrect because for this kind of reactions one of the products must be a precipitate and in the reaction we see that NAOH is soluble in water (aq) and H2 is a gas, none of them precipitate.
b. acid - base: the reactants must be an acid and a base, and the reactants of this reaction has a base but it's in the products.
c. Redox: This reaction is a redox reaction because for this reaction the oxidation numbers of the reactants must change and this happen in this reaction (H changes from +1 to 0) and Na changes from 0 to +1.
d. Combination. In this reaction the reactants combine to form a new compound and this doesn't happen here.
e. None of the above. is false because letter C is correct.
