The mass number of Fe2+ is 56. How many neutrons are there in a single Fe2+ atom?

Answers

Answer 1

Answer:

The mass of an atom comes from the protons and neutrons that are found in the nucleus. The number of protons is the atomic number of an element. To find the number of neutrons, subtract the atomic number from the mass of an atom. If the mass number of Fe2+ is 56. The atomic number is 26, so 56 – 26 equals 30 neutrons.

Answer 2

Answer:

Answer:

Simply put B.) 30

Explanation:

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Calculate the density of a piece of bone with a mass of 3.8 grams and a volume of 2.0 cubic centimeters. 1.9 g/cm3 0.53 cm3/g 7.6 g /cm3

Answers

Answer: The density if the bone is $1.9g/cm^3$ .

Explanation:

Mass of the bone = 3.8 grams

Volume of the bone = $2.0 cm^3$

Density is defined as mass present in per unit volume of the substance.

$density=(Mass)/(Volume)=(3.8 g)/(2.0 cm^3)=1.9g/cm^3$

The density if the bone is $1.9g/cm^3$ .

Answer:

1.9 g/cm

That's your answer!!

Which of the following likely formed Mars' moons?

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Asteroids that got caught in it's gravitational pull

Any method of determining whether an event or object is older or younger than others

Answers

the answer is relative dating, btw

I believe its relative dating.

The monoprotic acid from among the following isa. H2CO3.
b. H2SO4.
c. H3PO4.
d. HCl.

Answers

Answer: Option (d) is the correct answer.

Explanation:

An acid which gives only one hydrogen ion or $H^(+)$ ions upon dissociation in an aqueous solution is known as a monoprotic acid.

Whereas when an acid gives two hydrogen or $H^(+)$ ions upon dissociation in an aqueous solution is known as a diprotoc acid.

And when an acid gives three hydrogen or $H^(+)$ ions upon dissociation in an aqueous solution is known as a triprotoc acid.

Therefore dissociation of the given acids in an aqueous solution will be as follows.

$H_(2)CO_(3) \rightarrow 2H^(+) + CO^(2-)_(3)$

$H_(2)SO_(4) \rightarrow 2H^(+) + SO^(2-)_(4)$

$H_(3)PO_(4) \rightarrow 3H^(+) + PO^(2-)_(4)$

$HCl \rightarrow H^(+) + Cl^(-)$

Hence, we can conclude that out of the given options, HCl is the monoprotic acid.

Monoprotic acid are acids having only one hydrogen atoms after dissociation into ions from its compound. The monoprotic acid from among the following is HCl. The answer is letter D. HCl → H+ + Cl-. Note that there is only one H+ ion upon dissociation.

Neptunium's only naturally occurring isotope, 23793np, decays by emitting one alpha particle, one beta particle, and one gamma ray. What is the new atom formed from this decay?

Answers

The given isotope of Neptunium is $^(237) _(93) Np$

Alpha decay of an isotope results in daughter nuclide with mass number less by 4 units and atomic number less by 2 units than the parent isotope.

Alpha decay of Neptunium-237 can be represented as:

$^(237) _(93) Np-->^(233)_(91) Pa+^(4) _(2) He$

Beta decay of the above formed protactinium nuclide can be represented as:

$^(233)_(91)Pa-->^(233) _(92) U+^(0)_(-1)e$

Gamma decay releases only energy in the form of gamma rays, the nuclide remains the same.

$^(233)_(92)U-->^(233)_(92)U+$ γ

The new atom formed after the given decays is $^(233)_(92)U$

Which pair of elements is MOST likely to chemically combine and form ionic bonds?. A). chlorine and chlorine. B). lithium and chlorine. C). carbon and hydrogen. D). sulfur and oxygen