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Marrrta [24]
3 years ago
13

Look up the molecular weight of Lithium diisoproylamine and determine the amount of g of base needed for this experiment. Round

to the hundredths place
Chemistry
1 answer:
Bezzdna [24]3 years ago
7 0

Answer:

0.72 g

Explanation:

Note that, the mass in gram of any substance is obtained from the relationship;

Mass= number of moles × molar mass

From the sequence of the reaction, the number of moles of Lithium diisopropylamide is 6.75mmol which is the same as 6.75 × 10^-3 moles

Molar mass of base= 107.1233 g/mol

Hence mass of the base is given by;

6.75 × 10^-3 moles × 107.1233 g/mol = 0.72 g

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Explanation:

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Select the false statement below concerning period 4 transition elements. A. The nickel atom has 18 inner/core electrons. B. Bot
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Explanation:

Atomic number of nickel is 28 and its electronic distribution is 2, 8, 8, 2, 8. Therefore, in the inner/core electrons there are 18 electrons.

Atomic number of chromium is 24 and its electronic configuration is [Ar]4s^{1}3d^{5}. Whereas atomic number of manganese is 25 and its electronic configuration is [Ar]4s^{2}3d^{5}.

Hence, the statement both chromium atom and the manganese atom have half-filled d sub-shells, is true.

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So, there are three unpaired electrons in a Vanadium atom and in nickel atom there are 2 unpaired electrons.

Hence, the statement vanadium atom has fewer unpaired electrons than the nickel atom, is false.

Atomic number of titanium is 22 and its electronic configuration is [Ar]4s^{2}3d^{2}. Atomic number of zinc is 30 and its electronic configuration is [Ar]4s^{2}3d^{10}.

There are no unpaired electrons in a zinc atom. Hence, the statement titanium atom has more unpaired electrons than the zinc atom, is true.

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Thus, we can conclude that false statements below concerning period 4 transition elements are as follows.

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