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3 years ago

Help please!!?!!??!!

Chemistry

1 answer:

Minchanka [31]3 years ago

8 0

Answer:

65.38 u

Explanation:

Change each percent abundance into decimal form (by dividing by 100) then multiply each by the atomic mass of it's isotope. Add together each isotope to get the average atomic mass of the element.

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Kinetic molecular theory is often used to describe conductors because as the_____ increases the thermal conductivity of the mate

Lilit [14]

The answer is actually B. Collisions

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4 years ago

Which statement below is true about a nuclear power plant?

ludmilkaskok [199]

Answer:

There is no air pollution

Explanation:

Unless there is a meltdown.

Nuclear plants generate far more power than coal plants

FUEL is needed....nuclear fuel

Leakage CAN happen.... see info on Three Mile Island or Cchernobryl (Ukraine)

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2 years ago

What is a particle diagram to illustrate the composition of air

navik [9.2K]

A diagram of the composition of air would be the air's chemical formula and it's structure.

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4 years ago

Enolase, an enzyme that catalyzes the conversion of 2-phosphoglycerate to phosphoenolpyruvate: Group of answer choices demonstra

Tanzania [10]

Answer:

Requires two Mg²⁺ cofactors and as such demonstrates metal-ion catalysis

Explanation:

Electrostatic catalysis or metal ion catalysis is a catalytic mechanism that makes use of metalloenzymes, such as enolase along with a metal ion which is bound tightly, including, Mo⁶⁺, Ni³⁺, Co³⁺, Mn²⁺, Zn²⁺, Cu²⁺, and Fe²⁺, to undertake a catalysis

For maximal activity, enolase requires the presence of 2 equivalent metal ions in each site which is active

Therefore, the correct option is; requires two Mg²⁺ cofactors and as such demonstrates metal-ion catalysis

5 0

4 years ago

for each pair of compounds below , identify the one that would be expected to have more ionic character.explain you choice. (a)N

Tju [1.3M]

Answer:

a)NaBr

b)FCl

Explanation:

To identify which compound is more ionic we will calculate the electronegativity difference.

A) NaBr

Electronegativity of Na = 0.93

Electronegativity of Br = 2.96

Electronegativity difference = 2.96- 0.93 = 2.03

HBr

Electronegativity of H = 2.2

Electronegativity of Br = 2.96

Electronegativity difference = 2.96 - 2.2 = 0.76

NaBr have more ionic character because of large electronegativity difference.

B) BrCl

Electronegativity of Cl = 3.16

Electronegativity of Br = 2.96

Electronegativity difference = 3.16 - 2.96 = 0.2

FCl

Electronegativity of F = 3.98

Electronegativity of Br = 2.96

Electronegativity difference = 3.98 - 2.96 = 1.02

FCl have more ionic character because of large electronegativity difference.

8 0

3 years ago