How is an average mass different from a weighted average mass?

Answers

Answer 1

Answer:

The weighted average mass of the atoms in a naturally occurring sample of an element is the average atomic mass, also known as atomic weight.

What is atomic mass?

The average mass of an element's atoms expressed in atomic mass units is known as its atomic mass (amu, also known as daltons, D).

The mass of each isotope is multiplied by its abundance to produce the atomic mass, which is a weighted average of all the isotopes of that element.

Any element has a variety of isotopes, thus to take into consideration the fact that each isotope has a different mass, a weighted average mass is used.

A weighted average takes into account the potential that an element's average mass, as calculated from a random sample, will most likely coincide with the average mass of its more common isotopes.

The weighted average masswill therefore be closest to that of the more prevalent isotopes.

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Answer 2

Answer: With any element, there are a range of isotopes . . . a weighted average mass is used because there exist different isotopes of that element, each of varying mass. A weighted average accounts for the fact that the average mass (that may likely be measured from a random sample of the element) will most likely reflect the average mass of the more abundant isotopes. So the weighted average mass will be most comparable to the more abundant isotopes.

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Compared to an atom of phosphorus-31, an atom of sulfur-32 contains
What group of elements least strongly attract electrons from other atoms in a compound
In the late 1800s, the British scientist J. J. Thomson discovered that atoms were composed of positively-charged and negatively-charged particles. He proposed that these two types of particles were evenly mixed throughout the structure of the atom. How does this atomic model differ from current atomic models?A. Current atomic models show that atoms do not have positively-charged particles. B. Current atomic models show an atom's positively-charged particles concentrated in the center of the atom. C. Current atomic models show that atoms do not have negatively-charged particles.

A + B → C Select the rate law for the reaction above using the following information: Holding the concentration of A constant and doubling the concentration of B results in the rate of the reaction increasing from 1.5E-3 M/s to 1.2E-2 M/s. Keeping the concentration of B constant and doubling A results in the rate of the reaction increasing from 1.5E-3 M/s to 3.0E-3 M/s.

Answers

For the initial conditions:
1.5E-3 = k A^n B^m

For the second condition:
1.2E-2 = k A^n (2B)^m
1.2E-2 = 2^m k A^n B^m
From the initial condition:
1.2E-2 = 2^m (1.5E-3)
m = 3.32

For the third condition:
3.0E-3 = k (2A)^n B^m
3.0E-3 = 2^n k A^n B^m
3.0E-3 = 2^n (1.5E-3)
n = 1

Therefore, the rate law is:
r = k A B^3.32

A box experiences a force of 2 N to the left and 3 N to the right. Which is true of the box's motion?

Answers

Answer:

The box will experience acceleration

Explanation:

The box experiences unbalanced forces and will, therefore, accelerate in other words, the force applied on it from the right is greater than that exerted on it from the left.

the box is expected to go to the right since the 3N is stronger than the 2N and the rightward force will over come the leftward force.

Technician A says that a soldering gun must be energized for several minutes before it warms up to the melting point of solder. Technician B says that a soldering torch is heated by burning butane gas. Who is right

Answers

Answer:

Both are right

Explanation:

A constant heat must be supplied for several minutes to soldering gun to overcome the melting point of solder. A butane torch is a type of soldering device powered (energised) by the burning of butane gas to melt and solder common metals

Why does vomit taste sour

Answers

Stomach acid curdles the stomach contents (food) when being broken down and digested for absorption into the body; so it's like "spoiled food" and this is what is regurgitated when vomit.

What is the compound name for P4Br8

Answers

Tetra phosphorous octa bromide is the compound name for P4Br8.

What is compound?

A substance is from a combination of two or more different chemical elements. They are pure chemical substances found in nature.

The smallest unit of a compound is molecule.

Both phosphorous and bromide are on the right side of the periodic table.

Both phosphorous and bromide form covalent bond.

Atomic weight of phosphorous is 30.97 and atomic number is 15.

Atomic weight of bromine is 79.9 and atomic number is 35.

The name is tetra because there are 4 phosphorous and octa means there is 8 bromide.

The ratio of phosphorous and bromide is 4:8.

Tetra phosphorous octa bromide is the compound name for P4Br8.

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These are both on the right side of the periodic table, so they bond covalently.The name would be TETRAphosphorous OCTAbromide. Tetra because there are 4 phosphorus molecules, and octa because there re 8 bromine molecules
Hope that helps!

The various components of a mixture or do not combine chemically true false

Answers

im pretty sure the answer is false

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