Please check if that’s right

From the information given:

∴

The volume of the sterling silver pendant is:

= 61.3 mL - 50.0 mL

= 11.3 mL

Since, 1 mL = 1cm³

Then;

11.3 mL = 11.3 cm³

Using the relation for Density; i.e.

[tex]\mathbf{Density = \dfrac{mass}{volume}}[/tex]

[tex]\mathbf{10.25 \ g/cm^3= \dfrac{mass}{11.3 \ cm^3}}[/tex]

mass = 10.25 g/cm³× 11.3 cm³

mass of the sterling silver = 115.825 grams

Recall that sterling silver has:

∴

The mass of the copper contained in the sterling silver pendant can be calculated as:

[tex]\mathbf{= \dfrac{115.825 \ g \times 7.5}{100}}[/tex]

= 8.687 grams

Therefore, we can conclude that the mass of the copper contained in the sterling silver pendant is 8.687 grams

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1.Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in the form of a natural crystalline mineral is known as rock salt or halite. Salt is present in vast quantities in seawater. The open ocean has about 35 grams (1.2 oz) of solids per liter of sea water, a salinity of 3.5%.

2.Water (chemical formula H2O) is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent[1]). It is vital for all known forms of life, even though it provides no calories or organic nutrients. Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. The hydrogen atoms are attached to the oxygen atom at an angle of 104.45°.[2] "Water" is the name of the liquid state of H2O at standard conditions for temperature and pressure.

Explanation:

Answer:

150 mL of 1.50 M HCL

Explanation:

So the equation you need to solve this equation is:

M1*V1=M2*V2 --> M1= Molarity of the acid you are diluting V1= Volume of the solution you need to dilute. M2=The molarity of thee solution you have made. V2=Volume of the solution you have made

M1= 1.50 M HCL

V1= Unknown

M2=0.450 M HCL

V2= 500 mL

Simple algebra says that V1= (1.5*500)/.450 = 150 mL of 1.50 M HCL

The values that determines the number of significant figures in the answer is 3.72

In mathematics and science, a significant figure refers to any figure that contributes to the degree of accuracy of a value that is being measured.

The value having the value having the least number of significant figures in a multiplication determines the number of significant figures in the answer.

In this case, 3.72 has the least number of significant figures hence it determines the number of significant figures in the answer.

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Answer:

3.72

Explanation:

3.72 has the least number of significant figures which means the number of significant figures is the answer.

Answer:

Answer:

its A -NH2 (vmxkgcjfxjfkhcfgk)

Answer:

It is a simple and clear account of the development of the codpuscular or, as sortie prefer to call it, the electronic, theory, of matter to explain the passage of electricity through metals and gases.

Explanation:

THE present volume is an expansion of six lectures delivered by; Prof. J. J. Thomson in his capacity of professor at: the Royal Institution. It is a simple and clear account of the development of the corpuscular, or, as sortie prefer to call it, the electronic, theory, of matter to explain the passage of electricity through metals and gases. The last two chapters are devoted to consideration of the properties of model atoms built up of corpuscles, and the evidence in favour of the view that the number of the corpuscles in an atom is about the same as its atomic weight in terms of hydrogen.

Answer:

A) Physical

B) Chemical

C) Chemical

D) Physical

E) Chemical

Explanation:

Physical changes are reversible while chemical changes are not.

Answer:  20g/(volume of water displaced)

Explanation:  Density = Mass/Volume  Once the volume of displaced water is known, divide the 20 grams by the volume.

Answer: B

Explanation:

The rate law is the mathematical equation that describes how reactant concentration changes as a function of time. A law such as "Rate = k*[A]*[B]" means that, for each liter-equivalent of the reactant(s) A, there are k liters of reactant B. The law also dictates the molarity (and thus partial pressure) for each component in solution.

0.089

Explanation:

2.5/ 14= .178 then 0.178/ 2 again and you get 0.089  

Answer:

Molar mass of nitrogen gas = (14 × 2) = 28 g

But molar mass is 1 mole

[tex]28 \: g \: are \: 1 \: mole \: of \: nitrogen \\ 2.5 \: g \: are \: \{ \frac{2.5 \times 1}{28} \} \: moles \\ \\ = { \boxed{ \boxed{0.089 \: moles}}}[/tex]

Answer:

e

Explanation:

cm is not the unit of wave number out of the following.

Definition: Total number of wave cycles present in a unit distance is termed a wave number.

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A wooden baseball bat is an example of a heterogeneous substance.

A heterogeneous substance is consists of compounds that are not thoroughly mixed together.

Woods are fibrous structural substances with spaces present in trees and other woody plants' stems as well as roots. They are composed of a natural composite of cellulose fibers and are contained with a lignin matrix that is capable of resisting compression.

They can use for fire, building, the manufacture of weapons and tools, furniture, as well as paperwork.

Wood is a heterogeneous, highly porous cellular material. It is made up of cells and the cell walls are made up of roughly 40% cellulose, 15% hemicellulose, and lignin of about (15–30%).

Therefore, we can conclude that a wooden baseball bat is an example of a heterogeneous substance.

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[tex]\boxed{\sf {Ca(OH)_2(s)\atop Calcium\:Hydroxide}\longrightarrow {CaO(s)\atop Calcium\;oxide}+{H_2O(g)\atop water}}[/tex]

On reactant side

On product side

hence balanced.

Answer:

the importance of the periodic table are,

To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

Explanation:

hope its help for you

thank you

have nice day

Answer:

H = 6

O = 6

Fe = 3

Total atoms = 15

Explanation:

3Fe (OH)2

Fe = 1×3

O= 2× 3 = 6

H= 2× 3 = 6

Total atoms = 6+6+3=15

I hope I helped you^_^

Answer:

Explanation:

when a burning splinter is introduced into a jar of carbon dioxide the burning fire gets puts out due to the presence of carbon dioxide which is a colorless odorless gas that prevents the burning of fire

Unit conversion using dimensional analysis is performed by multiplying the given unit with the conversion factor

The volume of a 2 ft.³ in cubic meters is approximately 0.056634 m³

The given mass of the sample of metal, m = 950 pounds

The units of density using the imperial units = [tex]lb_m[/tex]/ft.³

The units of the volume of the metal sample based on the above density = Cubic feet

The desired units = Cubic meters

The conversion factor for converting a unit in cubic feet to a unit in cubic meters is presented as follows

1 ft.³ = 0.0283 m³

Therefore, using dimensional analysis, the volume quantity in cubic feet is multiplied by 0.0283 m³/(1 ft.³) to convert the volume to cubic meters

Example;

Given that the volume of the metal sample 2 ft.³, we have that the volume in cubic meters is therefore;

2 ft.³ × (0.0283 m³)/(1 ft.³) ≈ 0.056634 m³

The volume of a sample of metal that is 2 ft.³ in cubic meters is ≈ 0.056634 m³

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Answer:

correct answer is A

Explanation:

The option which describes the particles of water as liquid water actively boils to become steam is: A. The particles will gain kinetic energy and increase temperature during boiling.

Water refers to a liquid molecule that is typically made up of two (2) main chemical elements; hydrogen and oxygen in the ratio of two (2) to one (1)  [2:1].

Generally, the boiling point of water is approximately at one hundred (100) degrees Celsius and at this temperature, water is typically converted into steam. This is usually as a result of the fact that, the particles of water gains more kinetic energy and an increase in temperature as it boils to become steam.

In conclusion, heating water causes its temperature to increase and the water molecules would gain kinetic energy as it actively boils to become steam.

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Answer:

Which of the following best describes the make up of Saturn's rings?(1 point) solid bands of sand and dust that formed from the start of the universe solid bands of sand and dust that formed from the start of the universe material from comets that have passed through Saturn's atmosphere material from comets that have passed through Saturn's atmosphere dust, rock, and ice particles that orbit due to Saturn's gravity dust, rock, and ice particles that orbit due to Saturn's gravity debris and rocks from other planets that orbit around Saturn

The make up of Saturn's ring are dust, rock, and ice particles that orbit due to Saturn's gravity"

Saturn is one of the 9 planets of the solar system. It is considered to be the second largest planet.

Saturn has seven large rings orbiting around it. These rings are believed to be pieces of comets, asteroids, or shattered moons that broke up before they reached the planet. And this shattered comets or asteroid are believed to be torn apart by Saturn's powerful gravity.

These comets or asteroids are made of billions of small chunks of ice and rocks which are covered or coated with other small materials such as dust particles.

Thus, the correct option that matches the above explanation is "dust, rock, and ice particles that orbit due to Saturn's gravity"

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Answer:

C).Iron

Explanation:

Iron has a binding energy of 8.8MeV

Answer:

right answer is option no c

Taking into account the definition of density, the volume of an object with a mass of 25.210 mL and a density of 11.3[tex]\frac{g}{cm^{3} }[/tex]  is 2.23 cm³.

First of all, density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that relates the mass and volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

Density, according to the International System of Units, is usually expressed in kilogram per cubic meter ([tex]\frac{kg}{m^{3} }[/tex])or gram per cubic centimeter ([tex]\frac{g}{cm^{3} }[/tex]).

In this case, you know:

Replacing in the definition of density:

[tex]11.3\frac{g}{cm^{3} }=\frac{25.210g}{volume}[/tex]

Solving:

volume× 11.3 [tex]\frac{g}{cm^{3} }[/tex]=25.210 g

[tex]volume=\frac{25.210g}{11.3\frac{g}{cm^{3} }}[/tex]

volume= 2.23 cm³

In summary, the volume of an object with a mass of 25.210 mL and a density of 11.3[tex]\frac{g}{cm^{3} }[/tex]  is 2.23 cm³.

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Answer:

HE coracle—as I had ample reason to know before I was done with her—was a very safe boat for a person of my height and weight, both buoyant and clever in a seaway; but she was the most cross-grained, lop-sided craft to manage. Do as you pleased, she always made more leeway than anything else, and turning round and round was the manoeuvre she was best at. Even Ben Gunn himself has admitted that she was "queer to handle till you knew her way."

Explanation:

Answer:

which formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)?

» d.2 x molar mass of H + 2 x molar mass of O

Explanation:

Since we've two hydrogen atoms and two oxygen atoms, we multiply each mass by 2

[tex] = (2 \times hydrogen) + (2 \times oxygen) \\ = (2 \times 1) + (2 \times 16) \\ = 2 + 32 \\ = 34 \: g[/tex]

Which of the following statements best defines the actual yield of a reaction?

» d.The ratio of measured yield over stoichiometric yield

Answer:

gram or kilogram

Explanation:

these are the only ways for mass of the options

Answer:

unit of the mass is kilogram that the answer

Answer:

2160 days divided by 365 days which is a year is equal to about 5.9 years in school * sighhh*

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