Answer:
4 M
Explanation:
Molarity refers to the molar concentration of a substance (solution). It can be calculated by using the formula below:
Molarity (M) = number of moles (n) ÷ volume (V)
According to the information provided in this question;
V = 0.4 liter
n = 1.6 moles
Molarity = n/V
Molarity = 1.6/0.4
Molarity = 4 M
Answer:
9.6768 × 10^6
Explanation:
to convert weeks into seconds use the formula of multiplying the time by the value by 604800.
16×604800=967,800. Now just turn that into scientific notation to get the answer.
<em>please correct me if im wrong.</em>
(c) Cu + S → CuS is a redox reaction
Explanation:
We have the following chemical reactions:
(a) K₂CrO₄ + BaCl₂ → BaCrO₄ + 2 KCl
(b) Pb²⁺ + 2 Br⁻ → PbBr₂
(c) Cu + S → CuS
There is a redox reaction where the elements are changing the oxidation state. The reaction (c) is such a case.
Cu + S → CuS
Cu in elemental state have a oxidation number of 0 and in CuS (copper sulfide) have a oxidation number of +2.
S in elemental state have a oxidation number of 0 and in CuS (copper sulfide) have a oxidation number of -2.
Learn more about:
redox reactions
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