What is the mass of 4.23×10^23 atoms of iron

Answers

Answer 1

Answer: First divide atoms by Avogadro's number:
(4.32x10^23)/(6.02x10^23) = .703mol Fe

Then multiply moles by its molar mass:
(0.703mol Fe)(55.85g/mol Fe) = 39.24g Fe

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The mass spectrum of a sample of a pure element is shown above. Based on the data, the peak at 26amu represents an isotope of which of the following elements? A) Al with 13 neutrons
B) Mg with 14 neutrons
C) Fe with 26 neutrons
D) Ti with 26 neutrons

Answers

The correct answer is option B: Mg with 14 neutrons

The mass spectrum shows the charge to mass ratio of atoms. I can be used to sort the isotopes of an element.

Isotopy is a phenomenon in which atoms of the same element have the same atomic number but different mass numbers.

The mass spectrum of atoms separates atoms on the basis of charge to mass ratio of the isotopes.

The isotopes of magnesium are; 24Mg atom which has 12 neutrons 25Mg which has 13 neutrons, and 26Mg which has 14 neutrons.

Hence, the peak at 26amu represents 26Mg which has 14 neutrons.

brainly.com/question/24160758

Answer:

The answer is B

Please help!The following gases are at STP. Which one will diffuse the fastest? O2, H2, SO2, NO, NH3
O2
H2
NH3
NO
SO2

Answers

Hydrogen will defuse the fastest because it is the lightest

Cause and effect of local winds?

Answers

Local winds are caused by the different surfaces on each lands which heat up differently based on climate and its temperature. This is a complete difference in temperature, and therefore causes a difference in pressure as well. This is capable of causing the air to move differently based on the actual location.

Ammonia is a weak base because it produces ___ ions in solution

Answers

only a few ions (in comparison to others that totally break apart)

Compounds that do not conduct an electric current in either aqueous solution or when molten are referred to as _____.a. electrolyte
b. nonelectrolyte
c. not listed
d. ionic

Answers

The answer is B. Nonelectrolyte. Nonelectrolytes are substances that do not dissociate into ions when dissolved in a solution. In some cases, they dissociate into molecules rather than ions. They are usually polar covalent substances such as sucrose (C12H22O11). Nonelectrolytes are considered to be poor conductors of electricity.

Why is helium used in airships rather thaan the other nobles gases

Answers

Answer:

It is less dense than air so it will help the airship float, and it is not flammable so the airship is less likely to catch on fire. None of the other noble gases have similar or better reasons.

Explanation:

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