To do this problem it is necessary to take into account that the heat given by the unknown substance is equal to the heat absorbed by the water, but considering the correct sign:

Clearing the specific heat of the unknown substance:

Answer:
D
Explanation:
The atomic number is the amount of protons in the nucleus of every atom in a specific substance
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Answer: Option (e) is the correct answer.
Explanation:
Chemical formula of a nitrate ion is
and it acts as a strong oxidizing agent because it itself gets reduced easily.
As we know that an oxidizing agent tends to oxidize other substances by itself gaining electrons. As a result, there will occur a decrease in its oxidation state.
The oxidation number of nitrogen in
is +5. So, it gains electrons and helps in oxidizing other substances.
Thus, we can conclude that the nitrate anion is a strong oxidizing agent.
Explanation:
so, as you move down a group on the periodic table, the electronegativity of an element decreases because the increased number of energy levels puts the outer electrons very far away from the pull of the nucleus. electronegativity increases as you move from left to right across a period on the periodic table.
Answer:17.9 grams
Explanation:I took the quiz
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