Categories
Assignment Help

Alicia has a gold bracelet and a silver bracelet. She has a black ring, a blue ring, a brown ring, and a white ring. She also has a gold necklace and a silver necklace. How many different combinations of bracelets, rings, and necklaces can Alicia make?

[ad_1]

Alicia has a gold bracelet and a silver bracelet. She has a black ring, a blue ring, a brown ring, and a white ring. She also has a gold necklace and a silver necklace. How many different combinations of bracelets, rings, and necklaces can Alicia make?

[ad_2]

Categories
Assignment Help

A chunk of gold and copper in the ratio 20:7. How much gold is in this 200g sample of gold

[ad_1]

A chunk of gold and copper in the ratio 20:7. How much gold is in this 200g sample of gold

[ad_2]

Categories
Assignment Help

Central idea: Utopians strive to make gold and silver less valuable. Which statement provides a critique of the central idea? The Utopians use gold to make chains and earrings for enslaved people. To show their disinterest in gold, Utopians drink from earthen cups. It is a waste to use gold for everyday purposes, because it is hard to find. Thomas More wrote during a time when gold was highly valued.

[ad_1]

Correct answer choice is :

C) It is a waste to use gold for everyday purposes, because it is hard to find.

Explanation:

An utopia is an assumed community or society that maintains highly beneficial or nearly perfect conditions for its citizens. The opposition of a utopia is a dystopia. One could also say that a utopia is an ideal place that has been planned so there are no problems. In many cultures, societies, and religions, there is some story or fantasy of a different past when humankind lived in a modest and simplistic state, but at the same time one of perfect happiness and fulfillment.

[ad_2]

Categories
Assignment Help

Read the following sentences from the passage. In the late 1820s, gold was discovered in the northern and central regions of Georgia. With thoughts of easy money, many European settlers came to the regions. Which is the best way to rewrite these sentences? In the late 1820s, gold was discovered in the northern and central regions of Georgia. With thoughts of easy money, these regions were settled by many Europeans. In the late 1820s, explorers discovered gold in the northern and central regions of Georgia. With thoughts of easy money, many European settlers migrated to these regions. In the late 1820s, explorers discovered gold in the northern and central regions of Georgia. With thoughts of easy money, many European settlers infiltrated to the region.

[ad_1]

Answer:

Option b. The following is the best way to rewrite the sentences:

In the late 1820s, explorers discovered gold in the northern and central regions of Georgia. With thoughts of easy money, many European settlers migrated to these regions.

Explanation:

The first comma after 1820s is used to separate the dependent clause that initiated the sentence with the rest of it. Then a full stop is used as the sentence had made a full concept that does not need further adding, instead it is time to start a new sentence that will further explain what happened after explorers discovered gold in Georgia. In this second sentence, a comma is again used to separate the two clauses that constitute the sentence.

[ad_2]

Categories
Assignment Help

White gold is an alloy that typically contains 45.0% by mass gold and the remainder is platinum. if 154 g of gold are available, how many grams of platinum are required to combine with the gold to form this alloy?

[ad_1]

Percent by mass of platinum in white gold = 100% – 45% = 55%

We let x be the mass of the white which is 45% gold and 55% platinum. 

Mass of gold in white gold = m x 0.45

where m is the total mass.

From the given above, we formulate the equation that would allow us to determine the mass of white gold.
                            154 = x (0.45)
                                     x = 342.22 g

Then, we determine the amount of platinum.
                     mass of platinum = (342.22 g)(0.55)
                      mass of platinum = 188.22 grams

Thus, 188.22 grams of platinum is needed. 

[ad_2]

Categories
Assignment Help

Explain how the Gold Rush helped in the growth and development of California.

[ad_1]

Explain how the Gold Rush helped in the growth and development of California.

[ad_2]

Categories
Assignment Help

A sample of gold has a mass of 38.6 grams and a volume of 2 cm3. What is the density of gold?

[ad_1]

This problem is to apply Roult’s Law.

Roult’s Law states that the vapor pressure, p, of a solution of a non-volatile solute is equal to the vapor pressure of the pure solvent, Po solv, times the mole fraction of the solvent, Xsolv

p = Xsolv * Po sol

X solv = number of moles of solvent / number of moles of solution

The solvent is water and the solute (not volatile) is glycerin.

Number of moles = mass in grams / molar mass

mass of water = 132 ml * 1 g/ml = 132 g

molar mass of water = 18 g/mol

=> number of moles of water = 132 g / 18 g/mol = 7.33333 mol

mass of glycerin = 27.2 g

molar mass of glycerin:, C3H8O3: 3 * 12 g/mol + 8 * 1 g/mol + 3*16 g/mol = 92 g/mol

number of moles of glycerin = 27.2g / 92 g/mol = 0.29565

total number of moles = 7.33333 moles + 0.29565 moles = 7.62898 moles

=> X solv = 7.33333 / 7.62898 = 0.96125

=> p = 0.96125 * 31.8 torr ≈ 30.57 torr ≈ 30.6 torr.

Answer: 30.6 torr

[ad_2]

Categories
Assignment Help

Egypt, Libya, and Nigeria are all important suppliers of __________ to the US. A. diamonds B. gold C. fruits and vegetables D. oil

[ad_1]

The most important way in which the Greek influenced American democracy way was by allowing citizens to participate in government.

American took a clue from ancient Greek political system, which is democracy. It allowed all Athenians except women to take part in the political process, although in the United States both men and women are allowed to participate in American Democracy.

Further Explanation

After the United States got independence from England in 1776, the founders had the opportunity to choose how they will govern themselves. It was a very difficult task and for guardians, the founders looked for difference philosophies and examples of government throughout the world.

The democratic system of government of ancient Greece greatly influenced how the founding fathers came about the democracy practiced today in the United States.  

Before independence, the east coast was divided into 13 separate colonies. The founding fathers didn’t dissolve these colonies into colonial boundaries; rather it was divided into states. The founders dissolve the colonies into states so that each region would be governed at the local level and with the scope of national government, which will have power over all the state. In the United States, states actually looked like ancient Greek community structure known as polis or city-state.  

A polis is made up of urban centers including the land that surround it. Its development is also similar to how major cities and states capital in the United States were structured including rural areas surrounding each state.

LEARN MORE:

KEYWORDS:

  • greek
  • democracy
  • american
  • england
  • independence

[ad_2]

Categories
Assignment Help

North African countries, such as Libya and Egypt, are known for their production of __________. A. oil B. diamonds C. gold D. uranium

[ad_1]

North African countries, such as Libya and Egypt, are known for their production of __________. A. oil B. diamonds C. gold D. uranium

[ad_2]

Categories
Assignment Help

Which of the following is NOT true of this head dress from the Stilla nation? a. It was intended to be worn by the emperor during court sessions. b. The ornaments appear to be wings or feathers. c. It was assembled from thin sheets of gold. d. It was found in the old crown tomb

[ad_1]

Which of the following is NOT true of this head dress from the Stilla nation? a. It was intended to be worn by the emperor during court sessions. b. The ornaments appear to be wings or feathers. c. It was assembled from thin sheets of gold. d. It was found in the old crown tomb

[ad_2]

Categories
Assignment Help

Why did industrialists support the gold standard?

[ad_1]

Why did industrialists support the gold standard?

[ad_2]

Categories
Assignment Help

25. From left to right across a period in the periodic table, elements become less ___________ and more ______________ in their properties. 26. Francium has 36 isotopes, but only francium-223 occurs in nature. Francium-223 spontaneously emits particles and energy, so francium-223 is a(an) _____________ of francium. 27. At sea level, water ______________ at 100°C. 28. Cooking requires continuous addition of energy to the chemical reactions that are taking place. The chemical reactions involved in cooking can be described as __________________. 29. The ________________ theory of matter states that all particles of matter are in constant motion. 30. In Rutherford’s experiments, some of the _______________ aimed at gold atoms bounced back, suggesting that a solid mass was at the center of the atom. 31. You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would select the compound with the ________________ melting point. 32. A flight simulator that helps astronauts prepare for a shuttle launch is an example of a(an) __________________. 33. In the symbol ■([email protected]) He, the superscript 4 is the _________________ for helium, and the subscript 2 is the ___________________ for helium.

[ad_1]

25) Answer is: less metallic and more nonmetallic.

Electronegativity increases from left to right across a period, atoms have tendency to attract electrons.

Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.

26) Answer is: radioisotope.

Radioisotope has an unstable atomic nucleus and emit energy and particles when it changes to a more stable form.

Francium (Fr) is element with atomic number 87 (87 protons and 87 electrons).

27) Answer is: boils.

Boiling is the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere.

The Celsius scale was based on 0°C for the freezing point of water and 100°C for the boiling point of water at 1 atm pressure.

28) Answer is: endothermic.

There are two types of reaction:  

1) endothermic reaction (chemical reaction that absorbs more energy than it releases, ΔH>0).

2) exothermic reaction (chemical reaction that releases more energy than it absorbs).  

For example, the breakdown of ozone is an endothermic process. Ozone has lower energy than molecular oxygen (O₂) and oxygen atom, so ozone need energy to break bond between oxygen atoms.  

29) Answer is: kinetic.

The average kinetic energy of molecules depends on the temperature.  

As temperature increases, molecules gain more energy from surrounding and move faster.  

Kinetic energy (standard unit is the joule J) depends on speed of the molecule.  

Solid gains kinetic energy to become a liquid and then becomes a gas.

30) Answer is: alpha particles.

This was famous Rutherford’s Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles.

Rutherford observed the deflection of alpha particles on the photographic film.  

Alpha particles are helium atom particles, consist of two protons and two neutrons.  

According to Rutherford model of the atom: atoms have their charge concentrated in a very small nucleus.  

31) Answer is: highest.

For example, calcium oxide.

Calcium oxide (CaO) has ionic bonds between calcium cations (Ca²⁺) and oxygen anions (O²⁻).

Because it has strong ionic bonds, it has high melting point (around 2600°C).

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).

32) Answer is: a scientific model.

A scientific model is a representation of an idea, an object, a process or a system that is used to describe and explain phenomena that cannot be experienced directly.

33) Answer is: the superscript is mass number and the subscript is atomic number.

Atomic number(Z) is the number of protons, which is characteristic of a chemical element..

Mass number (A) is the total number of protons and neutrons in a nucleus.

[ad_2]

Categories
Assignment Help

What conclusion can be made from Ernest Rutherford’s the gold foil experiment

[ad_1]

25) Answer is: less metallic and more nonmetallic.

Electronegativity increases from left to right across a period, atoms have tendency to attract electrons.

Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.

26) Answer is: radioisotope.

Radioisotope has an unstable atomic nucleus and emit energy and particles when it changes to a more stable form.

Francium (Fr) is element with atomic number 87 (87 protons and 87 electrons).

27) Answer is: boils.

Boiling is the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere.

The Celsius scale was based on 0°C for the freezing point of water and 100°C for the boiling point of water at 1 atm pressure.

28) Answer is: endothermic.

There are two types of reaction:  

1) endothermic reaction (chemical reaction that absorbs more energy than it releases, ΔH>0).

2) exothermic reaction (chemical reaction that releases more energy than it absorbs).  

For example, the breakdown of ozone is an endothermic process. Ozone has lower energy than molecular oxygen (O₂) and oxygen atom, so ozone need energy to break bond between oxygen atoms.  

29) Answer is: kinetic.

The average kinetic energy of molecules depends on the temperature.  

As temperature increases, molecules gain more energy from surrounding and move faster.  

Kinetic energy (standard unit is the joule J) depends on speed of the molecule.  

Solid gains kinetic energy to become a liquid and then becomes a gas.

30) Answer is: alpha particles.

This was famous Rutherford’s Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles.

Rutherford observed the deflection of alpha particles on the photographic film.  

Alpha particles are helium atom particles, consist of two protons and two neutrons.  

According to Rutherford model of the atom: atoms have their charge concentrated in a very small nucleus.  

31) Answer is: highest.

For example, calcium oxide.

Calcium oxide (CaO) has ionic bonds between calcium cations (Ca²⁺) and oxygen anions (O²⁻).

Because it has strong ionic bonds, it has high melting point (around 2600°C).

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).

32) Answer is: a scientific model.

A scientific model is a representation of an idea, an object, a process or a system that is used to describe and explain phenomena that cannot be experienced directly.

33) Answer is: the superscript is mass number and the subscript is atomic number.

Atomic number(Z) is the number of protons, which is characteristic of a chemical element..

Mass number (A) is the total number of protons and neutrons in a nucleus.

[ad_2]

Categories
Assignment Help

Which of the following sentences uses the word “entice” correctly? It is important to entice when you are tired of trying. Companies entice their customers with great sale prices. The mechanics entice all of the parts in their shops. The government is guilty of trying to entice gold.

[ad_1]

Hey there!

Correct answer is D. Comma or Period Inside Rule

A. Question mark or exclamation point inside: those are not really necessary.

B. Colon or semicolon: not, a semicolon would divide the whole sentence and it would be shorten; a colon would work but after requested, when there is already a comma.

C. Question mark or Exclamation Point Outside Rule: would not work, becase it is an very polite and affirmative sentence.

D: A comma or period inside rule: actually, just a comma would work. Please, Cooper’s dad requested, go… Cooper’s dad requested must be in between commas as it is a vocative.

Hope this helps

[ad_2]

Categories
Assignment Help

How many grams of hydrochloric acid will react completely with a block of gold that is 3.2 cm by 3.8 cm by 2.8 cm, if the density of gold is 19.3 g/ml?

[ad_1]

This problem is to apply Roult’s Law.

Roult’s Law states that the vapor pressure, p, of a solution of a non-volatile solute is equal to the vapor pressure of the pure solvent, Po solv, times the mole fraction of the solvent, Xsolv

p = Xsolv * Po sol

X solv = number of moles of solvent / number of moles of solution

The solvent is water and the solute (not volatile) is glycerin.

Number of moles = mass in grams / molar mass

mass of water = 132 ml * 1 g/ml = 132 g

molar mass of water = 18 g/mol

=> number of moles of water = 132 g / 18 g/mol = 7.33333 mol

mass of glycerin = 27.2 g

molar mass of glycerin:, C3H8O3: 3 * 12 g/mol + 8 * 1 g/mol + 3*16 g/mol = 92 g/mol

number of moles of glycerin = 27.2g / 92 g/mol = 0.29565

total number of moles = 7.33333 moles + 0.29565 moles = 7.62898 moles

=> X solv = 7.33333 / 7.62898 = 0.96125

=> p = 0.96125 * 31.8 torr ≈ 30.57 torr ≈ 30.6 torr.

Answer: 30.6 torr

[ad_2]

Categories
Assignment Help

11. A tournament has 12 hockey teams participating. Find the number of different ways that teams can win gold, silver, and bronze trophies.

[ad_1]

You need to determine the number of ways in which 30 competitors from 50 can qualify. First, you have to realize that the order is irrelevant, that is: it is the same competitor_1, competitor _2, competitor _3 than competitor_3, competitor_2, competitor_1, or any combination of those three competitors.

So, the number of ways is which 30 competitors from 50 can qualify is given by the formula of combinations, which is:

C (m,n) = m! / (n! * (m -n)! )

=> C (50,30) = 50! / (30! (50 – 30)! ) = (50!) / [30! (50 – 30)!] = 50! / [30! 20!] =

 = 47,129,212,243,960 different ways the qualifiying round of 30 competitors can be selected from the 50 competitors.

[ad_2]

Categories
Assignment Help

If you lived in the eastern united states in 1849 and heard about the gold in california, what do you think you would do? why?

[ad_1]

If you lived in the eastern united states in 1849 and heard about the gold in california, what do you think you would do? why?

[ad_2]

Categories
Assignment Help

Which of these goods were shipped from Europe to Africa as a part of the triangular trade? A: Iron Products B: Rum C: Teas D: Gold

[ad_1]

Which of these goods were shipped from Europe to Africa as a part of the triangular trade? A: Iron Products B: Rum C: Teas D: Gold

[ad_2]

Categories
Assignment Help

Which statement is true about the prospectors of the klondike gold rush and the main character of to build a fire

[ad_1]

Answer:

The answer to the statement: You are writting an essay in class and you have 30 minutes in which to complete the task. Because you only have a short amount of time, you should not prepare an outline before writing, is, False.

Explanation:

The reason for this statement being false is that when writing an essay, especially when faced with very little time, it is almost a necessity to create first an outline precisely because this technique will help the writer organize himself and thus work faster.

The idea of an outline is to make matters easier for a writer by helping him organize his ideas, brainstorm and generate an initial skeleton of the essay that will come later. By doing this, the writer is actually saving time, because once the ideas become clear, and are placed on the outline, the rest of the essay, which is basically filling out the blank spaces, will flow much faster. An outline helps save time and turn an essay into an excellent and very reliable document.

[ad_2]

Categories
Assignment Help

An uncharged atom of gold has an atomic number of 79 and an atomic mass of 197. this atom has ________ protons, ________ neutrons, and ________ electrons.

[ad_1]

An uncharged atom of gold has an atomic number of 79 and an atomic mass of 197. this atom has ________ protons, ________ neutrons, and ________ electrons.

[ad_2]

Categories
Assignment Help

Which of the following was a major reason why an agricultural or industrial revolution never developed in Africa? A. Africa lacked the necessary raw materials. B. The gold and ivory trade in Africa was too profitable. C. Africa’s workforce was depleted by the slave trade. D. The majority of land in Africa was infertile.

[ad_1]

Answer: The Code of Hammurabi focuses on punishment for crimes, while Magna Carta does not.

Explanation:

The Code of Hammurabi is a well­preserved Babylonian law code of ancient Mesopotamia, dating back to about 1754 BC (Middle Chronology). The code consists of 282 laws, with scaled punishments, as graded depending on social status, of slave versus free man. While the Magna Carta is a medieval document that represents the foundation of civil liberties around the globe. As we can see, the difference remains at the punishment side, included only at the Code of Hammurabi

[ad_2]

Categories
Assignment Help

What scientist shot alpha particles into gold

[ad_1]

Answer:

A change in which chemical composition of the substance changes is known as a chemical change and said to have undergone a chemical reaction and a change in which only the physical properties of a substance change is known as a physical change.

Processes like cutting, grinding, phase change (melting, freezing, boiling) are all physical changes.

Processes like corrosion, burning are chemical changes.

Physical change:

A seed into seedling

wax melting from applied heat

grinding wheat to make flour

adding copper with gold to make jewelry

In all of the above examples, only the physical properties such as size, shape and phase has changed. hence, these are physical changes.

Chemical reaction occurs in:

making caramel by  burning sugar

tarnishing of silver

A chemically different new product is being formed when substance undergoes a chemical reaction like in the above examples.

[ad_2]

Categories
Assignment Help

What are the two reasons why the US government sent expeditions into the louisiana territory in the 1800s? The gov. wanted to learn about the strength of the French military in the area At that time, many Americans traveled there to search for gold and precious stones To learn more about the geography To Establish Friendly ties with the Native Americans To Prepare for a coming war against Great Britian

[ad_1]

Thomas Hobbes: Leviathan> In the Leviathan Hobbes (1587-1666) assumes that men are selfish and that the world does not satisfy all their needs, which makes them hostile to others. This would be the state of nature, where all would fight against all seeking individual interests. For peace of mind, men must give up some liberties. For this, all men make a Social Contract, giving moderating power to the State.  

 John Locke: 2nd Treaty on Civil Government> Locke contradicts Hobbes by arguing that the state of nature could not be a war of all against all, but a state of perfect freedom, without any form of subordination or subjection, all men being equal in power. In this context, men would be judges of their own causes and therefore the punishments would be extreme, which made them create a pact for the mutual conservation of life, through the Social Contract.

Jean Jacques Rousseau: The Social Contract> Unlike Hobbes and Lock, Rousseau considers man naturally good in the state of nature, and tries to explain the reason for the revocation of man’s freedom through the Social Contract. His conclusion is that in the civil state power relations may be disproportionate and the preservation of man’s well-being in civil society would depend on a hierarchy of socially instituted power.

William Blackstone: Commentaries on the Laws of England> Commentaries on the Laws of England> Introduces the “common law” of the people before the institutionalization and the evolution of the laws in England. His work of four volumes is a milestone for being the first that dealt with legal principles in a tangible way for lay people.

[ad_2]

Categories
Assignment Help

A glass of water and shelter from a snowstorm would be examples of ____, and a gold necklace and tickets to see professional wrestling would not be.

[ad_1]

Answer: B)  You should not judge things based on how they look and D) Courage can help you face your fears.

Explanation: In the given passage we can see a story of a girl named Tina, who was afraid of lizards since she was very little, and how she overcame that fear by learning about lizards and reptiles from her neighbor, Mr. Pamuk, who was a herpetologist. The two themes that can be found in the passage are that you should not judge things based on how they look (because that is why Tina was afraid) and that courage can help you face your fears (as it helped Tina).

[ad_2]

Categories
Assignment Help

1. jackson focused on the needs of the ___________ man.2. in the election of 1828, the u.s. electorate ___________ (increased or decreased?)3. what was the spoils system that was instituted by president jackson?4. what did the 1832 worchester v. georgia case have to say about georgia’a a s control over the cherokee nation?5. more than 25% of cherokee died on a forced march called the _______ ___ _________.6. why did jackson not like the bank of the unites states?7. in an effort to “kill” the bus (bank of the united states) before its charter expired, jackson removed u.s. _____________ from the bank.8. the specie circular (coin act) was an executive order issued by jackson in 1836. it required that all payments for government land had to be in gold and silver. this was done to stabilize the loan practices and the fact that too many bank notes were issued. however, jackson’a a s action triggered an economic recession known as the panic of _____.9. southerners viewed _________ (or taxes on imports) as helping the north at the south’s expense.10. no southern state was more upset about the 1828 tariff than ________ ________. their anger resulted in something known as the nullification crisis.11. what does the term “nullification” mean?12. ___________ debated daniel webster about states’ rights v. nationalism. it is widely believed that webster won these debates. however, this issue would not truly be resolved until the peace that followed the civil war.

[ad_1]

Answer:

Georgia didn’t send representatives to the First Continental Congress, for although Georgians opposed British trade regulations, many hesitated to join the revolutionary movement. They were self-sufficient, and a growing colony. And they thought they needed the protection of British troops against a possible Indian attack.

Explanation:

The First Continental Congress was a delegate convention of 12 of the thirteen North American colonies held on September 10, 1774, in Philadelphia, Pennsylvania, to send a written letter to King George III and Parliament calling for an end to the sanctions imposed by the Metropolis (England).

All colonies formed their association to ban trade with Great Britain.

Georgia did not send representatives, for although Georgians opposed British trade regulations, many hesitated to join the revolutionary movement. They were self-sufficient, and a growing colony. And they thought they needed the protection of British troops against a possible Indian attack.

Georgian delegates met at a provincial congress in Savannah on January 18, 1775, to discuss whether they should join the Association and elect representatives for the Second Continental Congress.

Those who were elected refused to go to Philadelphia. St. John’s Parish, acting alone, sent Lyman Hall.

[ad_2]