How do you calculate the mass of an atom of silver? Need to have this answer in 7th grade terms,

Answers

Answer 1

Answer:

To calculate the mass of an atom of silver, we need to know the number of protons and neutrons in the nucleus of the atom. The atomic number of silver is 47, which means it has 47 protons in its nucleus. The mass number of silver is 108, which means that the total number of protons and neutrons in its nucleus is 108. Therefore, the mass of an atom of silver is approximately 108 times the mass of a single proton or neutron. This is because the mass of an electron is much smaller than the mass of a proton or neutron and can be neglected. The mass of a single proton or neutron is approximately 1 atomic mass unit (amu), so the mass of an atom of silver is approximately 108 amu.

Related Questions

A student calculates the density of five different pieces of aluminum, each having a different volume.
Which graph best represents this relationship?
AN
KLEO
Volume
(A)
Volume
(B)
Volume
(C)
Volume
(D)

Answers

A student calculates the density of five different pieces of aluminum, each having a different volume Volume vs Density graph best represents this relationship.

What is Volume?

Volume is the measure of an object's three-dimensional space. It is often referred to as the capacity of a container, or the amount of space an object occupies. Volume is measured in cubic units such as cubic centimeters (cm3), cubic meters (m3), or cubic feet (ft3). Volume is an important concept in mathematics and is used to calculate the amount of material an object is made from, the capacity of a container, and the amount of space a figure occupies. Volume is also used to calculate the amount of liquid, gas, or other material that can fit into a container.

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what volume of a 60.0% solution by mass is made with 45.0g of solute

Answers

The volume of a 60% solution by mass that is prepared with 45 grams of a particular solute is 75 mL.

How do you calculate the volume of a 60.0% solution made with 45.0g of solute?

Firstly, to calculate the volume of the solution, we need to know the density of the solution. Since it is not mentioned in the question, we can assume it to be 1 g/ml.

Next, we can use the formula:

mass of solute = (mass of solution) x (percent by mass)

Here, the mass of solution is the mass of solute plus the mass of solvent.

Or, the mass of solute + the mass of solvent = the mass of solution

Therefore,

The mass of solvent = the mass of solution - the mass of solute

Substituting the values provided in the question, we get:

mass of solvent = (45) / (0.6) - 45 (since the solution is 60%)

mass of solvent = 75 - 45 = 30 g

Thus, mass of the solvent = 30g

Since volume = mass / density

The volume of the 60% solution = mass of solution / density

volume of solution = (45 + 30) / (1)

volume of solution = 75 mL

Thus, 75 mL of the 60% solution by mass is made with 45g of solute.

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a ___ weather front forms when a warm air mass pushes into a cooler air mass

a) cold
b) warm
c) stationary

Answers

Answer:

b) warm

Explanation:

A warm weather front forms when a warm air mass pushes into a cooler air mass. Therefore, the answer is b) warm.

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A mass of 1.71 g pure barium hydroxide is transferred quantitatively to a 250 cm3
volumetric flask and made up to the mark with distilled water. Using a pipette, 25.0 cm3
of the barium hydroxide solution are placed in a conical flask and a few drops of methyl
orange indicator are added. Hydrochloric acid is added slowly from a burette until the
endpoint is reached. The titre value is 12.6 cm3

What will the colour change of the indicator at the endpoint be?

Answers

The methyl orange indicator will change from red to yellow at the titration's endpoint.

How can the color of the indicator's change at the terminus be determined?

An acid-base indicator called methyl orange changes color between the pH ranges of 3.1 and 4.4. In acidic and basic solutions it is red and yellow, respectively

In this instance, an acid, hydrochloric acid, is being used to titrate the barium hydroxide solution. The pH of the solution will fall as we add the acid since it will neutralize the base. The hue of the methyl orange indicator will vary when the pH ranges from 3.1 to 4.4

All of the barium hydroxide will have interacted with the hydrochloric acid by the time the titration is complete leaving a neutral solution. When the methyl orange indicator becomes yellow the solution's pH is in the basic range.

Therefore, the methyl orange indicator will change from red to yellow at the titration's endpoint.

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Whales have one of the longest gestation periods of any mammal. According to a website, the mean gestation period for a whale is 15 months. Assume the distribution of gestation periods is Normal with a standard deviation of 1.1
months
a. Find the standard score associated with a gestation period of 13.9 months.
b. Using the Empirical Rule and your answer to part a, what percentage of whale pregnancies will have a gestation period between 13.9 and 15 months?
c. Would it be unusual for a whale to have a gestation period of 19 months? Why or why not?

Answers

a. A gestation period of 13.9 months has a standard score of -1.36.

b. Approximately 99.7% will fall within three standard deviations of the mean.

c. A gestation period of 19 months is very unlikely to occur in a normal distribution, and it would be considered unusual.

What is standard score?

a. To find the standard score associated with a gestation period of 13.9 months, we use the formula:

z = (x - μ) / σ

where x is the gestation period, μ is the mean gestation period, and σ is the standard deviation. Plugging in the values given, we get:

z = (13.9 - 15) / 1.1 = -1.36

Therefore, a gestation period of 13.9 months has a standard score of -1.36.

Empirical Rule:

b. Using the Empirical Rule, we know that approximately 68% of the gestation periods will fall within one standard deviation of the mean, approximately 95% will fall within two standard deviations of the mean, and approximately 99.7% will fall within three standard deviations of the mean.

Since we found the standard score in part a, we can use it to calculate the percentage of whale pregnancies that will have a gestation period between 13.9 and 15 months. This gestation period range is within one standard deviation of the mean, so we can say that approximately 68% of whale pregnancies will fall within this range.

What is gestation period?

c. A gestation period of 19 months is more than three standard deviations away from the mean gestation period of 15 months. Using the Empirical Rule, we can say that approximately 99.7% of the gestation periods will fall within three standard deviations of the mean. Therefore, a gestation period of 19 months is very unlikely to occur in a normal distribution, and it would be considered unusual.

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