The best example of a country that is dependent on other countries is a country that has very little or less fertile soil to make its resources.
Vietnam, a peripheral nation, greatly depends on core nations for industrialization, jobs, and aid. The 19th-century U.S. also showed dependency by borrowing heavily from abroad for economic development. This is a reflection of how nations are interconnected in the global marketplace.
Explanation:A prime example of a country that heavily depends on other countries is Vietnam. It is considered a peripheral nation, which means it has little industrialization and relies on more industrialized nations, called core nations, for jobs and aid. Their industries are often owned or leased by companies from these core nations, which causes a shift in power and resource distribution.
Another example can be seen in the United States during the 19th century. The country borrowed heavily from abroad, showing its dependency on external aid for its economic prosperity. This is basically a result of the interdependence of economies in our global marketplace.
Everyday items like food, clothes, and electronic gadgets are often products of international trade, giving rise to the intertwined economic systems of nations. For instance, the car you drive may be from Japan, while the fuel comes from the Middle East. Countries, therefore, rely heavily on one another to meet their needs and continue business operations.
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Which answer describes a chemical reaction in equilibrium?
1. the reactants are all used up
2. all the product is formed
3. the forward and reverse reactions have ceased
4. the forward and reverse reaction rates are the same
Answer is: 4. the forward and reverse reaction rates are the same.
The reaction rate is the speed at which reactants are converted into products.
The formation constant can be calculated when chemical equilibrium is reached, when the forward reaction rate is equal to the reverse reaction rate.
In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present in concentrations which have no further tendency to change with time.
Reaction rates of the forward and backward reactions are equal and there are no changes in the concentrations of the reactants and products.
What is the temperature of a gas that is expanded from 3.75 L at 37 degrees Celsius to 5.6 L?
Answer:
190 °C
Step-by-step explanation:
The pressure is constant, so this looks like a case where we can use Charles’ Law:
V₁/T₁ = V₂/T₂ Invert both sides of the equation.
T₁/V₁ = T₂/V₂ Multiply each side by V₂
T₂ = T₁ × V₂/V₁
=====
V₁ = 3.75 L; T₁ = (37 + 273.15) K = 310.15 K
V₂ = 5.6 L; T₂ = ?
=====
T₂ = 310.15 × 5.6/3.75
T₂ = 310.15 × 1.49
T₂ = 463 K
t₂ = 463 – 273.15
t₂ = 190 °C
Suppose you use 0.0150 liter of a 2.50 M solution of silver nitrate. Assuming the reaction goes completion how much silver sulfide is produced
M= Moles/ L
2.50=x/0.0150
x=0.0375 moles
moles x mm= grams
0.0375 x 247.8= 9.2925 grams
the answer is
C. 9.30 g
A sample of gas has a volume of 2.4 L and a pressure of 1.2 atm. What would the pressure of the same gas sample be if the volume is reduced to 1.8 L at a constant temperature?
0.90 atm
1.6 atm
5.2 atm
3.6 atm
Answer:
The correct answer option is 1.6 atm.
Explanation:
We know that there is a sample gas which has a volume of 2.4 L with a pressure 1.2 atm and we are to find the pressure of the same gas sample if its volume is reduced to 1.8 L at a constant temperature.
We will apply the Boyle's law here which states that the "pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature".
[tex]P_1V_1=P_2V_2[/tex]
Substituting the values in the formula to get:
[tex]P_2=\frac{1.2*2.4}{1.8} \\\\P_2=1.6[/tex]
Therefore, the pressure of the same gas sample will be 1.6 atm if the volume is reduced to 1.8 L at a constant temperature.
Describe how to write the Ksp.
b2+ + 2 NO3- + 2 Na+ + 2 I- >> PbI2 (s) + 2 Na+ + 2 NO3-
net ionic
Pb2+ + 2 I- >> PbI2
Ksp = [Pb2+] [I-]^2
Ksp = 7.1 x 10^-9
molar solubility
let x = mol/L of Pb2+ that dissolve . This will give x mol/L Pb2+ and 2x mol/L I-
7.1 x 10^-9 = (x) (2x)^2 = 4x^3
molar solubility = 0.0012 M
~~thanks to google research~~
How many moles are equal to 89.23 g of calcium oxide
the molecular formula of calcium oxide - CaO
The molar mass of CaO - 40 + 16 = 56 g/mol
Which means that 1 mol weighs 56 g
Therefore 56 g of CaO is - 1 mol
Then 89.23 g is equivalent to - 1/56 x 89.23 = 1.6 mol of CaO.
Final answer:
To find the number of moles in 89.23 g of calcium oxide, divide the mass by the molar mass of CaO, which is 56.0 g/mol, resulting in approximately 1.5934 moles.
Explanation:
To calculate the number of moles equivalent to 89.23 grams of calcium oxide (CaO), one must use the molar mass of CaO as a conversion factor. The molar mass of CaO, where calcium (Ca) has an atomic mass of 40.0 u and oxygen (O) has an atomic mass of 16.0 u, is 40.0 g/mol + 16.0 g/mol = 56.0 g/mol.
The number of moles of CaO can be determined by dividing the given mass by the molar mass:
Number of moles of CaO = (mass of CaO) / (molar mass of CaO)
= 89.23 g / 56.0 g/mol
= 1.5934 moles
Therefore, 89.23 grams of calcium oxide are equal to approximately 1.5934 moles of CaO.
Which of the following statements about Dalton’s atomic theory is true?
Dalton’s theory recognized that all matter is composed of atoms.
Dalton’s theory recognized the existence of smaller particles within atoms.
Dalton’s theory did not account for the similarities of atoms of the same element.
Dalton’s theory stated that atoms could not combine with each other.
We have to get the true statement about Dalton's atomic theory.
The true statement is: Dalton’s theory recognized that all matter is composed of atoms.
According to Dalton's atomic theory, all matter is made of atoms and atoms are indivisible and not destructible. So, the statement -Dalton’s theory recognized that all matter is composed of atoms- is true whereas the statement - Dalton’s theory recognized the existence of smaller particles within atoms is false.
As per Dalton's theory, all atoms of a given elements are identical in mass and properties, so the statement -Dalton’s theory did not account for the similarities of atoms of the same element is false.
Also, compounds are formed by a combination of two or more different kinds of atoms hence the statement - Dalton’s theory stated that atoms could not combine with each other is false.
Answer:
evidence that some kinds of matter are made up of waves instead of particles
observations that cannot be explained by the theory
Explanation: these ones are right trust
Four students presented different analogies to describe the formation of an ionic bond.
Student A: Two countries using a common waterway for navigation
Student B: A small dog and a big dog tugging at a bone with equal strength
Student C: Two neighbors carpooling to work
Student D: Assets of a small company being taken over by a large company
Which student presented a correct analogy?
The correct student would be student D since an ionic bond is made up of a metal and nonmetal where metals usually give electrons and nonmetals take.
Answer is: Student D: Assets of a small company being taken over by a large company.
Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).
For example, compound magnesium chloride (MgCl₂) has ionic bond.
In this example, chlorine is large company, because it has greater electronegativity than magnesium (small company) and take electrons (assets) from it.
Magnesium (Mg) transfers two electrons, became positive cation, to chlorine (Cl), which became negative anion.
Magnesium is metal from group 2 and chlorine is nonmetal from group 17 of the Periodic table.
Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.
is water an element compound or mixture
Final answer:
Water is classified as a compound because it consists of hydrogen and oxygen atoms bonded in a fixed ratio, represented by the chemical formula H2O. Elements contain only one type of atom, and mixtures combine substances without forming new chemical bonds.
Explanation:
Water is a compound, not an element or a mixture. This is because it is composed of hydrogen and oxygen atoms in a fixed ratio. To be more precise, a water molecule consists of two hydrogen atoms bonded to one oxygen atom, which can be represented by the chemical formula H2O. Molecules of elements contain only one type of atom, whereas molecules of compounds, like water, contain two or more types of atoms bonded together in a specific geometric arrangement.
In contrast, a mixture is a combination of two or more substances that maintain their own chemical identities, and they do not bond chemically to form a new compound. For example, air is a mixture of nitrogen, oxygen, argon, and carbon dioxide, among other gases.
PLEASEEEEE HELPPPP (ALL MY POINTS)
A natural gas stove transforms R energy into P energy.
What do R and P most likely represent?
A.) R represents chemical energy, P represents thermal energy
B.) R represents thermal energy, P represents chemical energy
C.) R represents potential energy, K represents electrical energy
D.) R represents electrical energy, K represents potential energy
A.) R represents chemical energy, P represents thermal energy
explanation: Gas is chemical. So when you turn on the gas stove the chemical comes out and then ignite and then after that fire appears and that is a thermal energy
Answer:
A.
Explanation:
Because gas is a chemical and it gets transferred into thermal because of a small flint making fire which is heat or thermal energy.
Hydrogen and nitrogen react to form ammonia according to the reaction,
3 H2 + N2 2 NH3
If 4.0 moles of H2 with 2.0 mol of N2 are reacted, how many moles of NH3 would be produced?
0.38 mol
2.0 mol
4.0 mol
2.7 mol
your answer would be 2.0
Answer:
2.7 mol
Explanation:
we have the following reaction
[tex]3 H_2 + N_2\longrightarrow 2 NH_3[/tex]
Data
[tex]2.0 mol H_2\\4.0mol N_2\\mol NH_3= ?[/tex]
First we must calculate what the limit reagent is.
the limit reagent is consumed first, when it is consumed completely the reaction is finished
[tex]3molH_2\longrightarrow 1mol N_2\\4molH_2\longrightarrow x \\x=\frac{4molH_2.1molN_2}{3molH_2}=1.33mol N_2[/tex]
This means that in order to fully consume 4 moles of hydrogen, 1.3 moles of nitrogen are needed, since we have more than this amount of nitrogen (the nitrogen is in excess) is our excess reagent and hydrogen is our limit reagent. so much is it that determines how much product is formed
From the stoichiometric coefficients of the reaction we know that three moles of hydrogen are needed to produce two moles of ammonia
So how many moles of ammonia will be produced if we have 4 moles of hydrogen
To solve it we apply a simple rule of three
[tex]3mol H_2\longrightarrow 2 mol NH_3\\4molH_2\longrightarrow x \\x=\frac{2molNH_3.4molH_2}{3molH_2}=2.7 mol NH_3[/tex]
2.7 mol NH_3 are produced
who is known as the "Father of Medicine." A. Galen B. Aristotle C. Galileo D. Hippocrates
D. Hippocrates
As quoted from Wikipedia, "he is often referred to as the "Father of Medicine"[1] in recognition of his lasting contributions to the field as the founder of the Hippocratic School of Medicine."
I hope this helps!
Cheers, July.
How to determine the amount of electrons transferred in a redox reaction
The amount of electrons transferred depends on how many electrons an element gains/loses. Metals normally lose electrons and nonmetals gain electrons to attain a total of 8 electrons.
what is the number of electrons in an atom of scandium
Scandium has 21 electrons, which are distributed according to its electronic configuration ([Ar] 3d¹4s²).
Explanation:The number of electrons in an atom of scandium (Sc) is equal to its atomic number, which is 21. The electronic configuration of scandium is [Ar] 3d¹4s², denoting that there are 2 electrons in the 4s orbital and 1 electron in the 3d orbital, after the argon core.The number of electrons in an atom of scandium (Sc) is equal to its atomic number, which is 21. Scandium is a transition metal and it is important to know that in its ionic form (Sc³+), it loses the 3 outer electrons and assumes an electronic structure similar to argon.
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74 POINTS to whoever can balance all these equations
please I need this done as fast as you can I'm in a pinch for time.
Thanks
Answers are in Word document.
Answer:
Explanation:
Bro im an excelletn as this but this was like two years ago
what type of rock is a obsidian , marble, and a conglomentary rock
Hi There!
Obsidian - Igneous Rock
Marble - Metamorphic Rock
Conglomentary - Sedimentary Rock
Hope This Helps :)
Hey!
-------------------------------------------------
Answer:
Obsidian is an igneous rock.
Conglomentary is a sedimentary rock
Marble is an metamorphic rock.
-------------------------------------------------
Explanation:
Igneous Rock - which is formed through the process of solidification and cooling of magma.
Sedimentary Rock - which is formed through the process of particles being picked up from under bodies of water.
Metamorphic - Which is formed through the process of a rock going through physical or chemical changes.
-------------------------------------------------
Hope This Helped! Good Luck!
It is widely known that fossil fuels pollute the environment and cause harmful effects. Why then are fossil fuels still being widely used?
1. not enough of society knows the harmful nature of fossil fuels
2. cost-effective alternatives are not yet ready to replace fossil fuels
3. alternative fuels offer just as many environmental problems as fossil fuels
4. the demand for alternative fuels cannot be met by current manufacturers
Fossil fuels are still being widely used because of the fact that the demand for alternative fuels cannot be met by current manufacturers.
Answer:
cost-effective alternatives are not yet ready to replace fossil fuels; they are the cheapest resource, especially oil.
Which statement about chemical reactions is not true?
The ways in which atoms are joined together are changed.
The starting substances are called reactants.
The bonds of the reactants are broken and new bonds of the products are formed. New atoms are formed as products.
The chemical reaction is the process in which one or more reactants are converted into one or more than one product. The statement about chemical reactions is not true is new atoms are formed as products.
What is chemical reaction ?In a chemical reaction, one or more materials known as reactants are changed into one or more additional substances also known as products. Chemical elements or chemical compounds make up substances.
When one or more chemicals are transformed into one or more other compounds, a chemical reaction takes place. Example: the formation of rust when iron and oxygen combine. Sodium acetate, carbon dioxide, and water are produced when vinegar and baking soda are combined.
As long as the mass of the reactants before the reaction is equal to the mass of the products after the reaction, mass is conserved in chemical reactions even when new products are formed.
Thus, Option D is correct.
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Which of these would have the LEAST amount of inertia? A. a car B. a building C. a gold brick D. a moving car
Answer: (c) a gold brick would have the least amount of inertia.
The inertia of an object refers to its ability to continue in its present state of rest or uniform motion until any external force act of the body to change its state of motion.
The inertia of a body increases with its mass. For this reason, a body with more mass and high inertia needs larger force to change its state of motion or rest. Among the given objects, the mass of a gold brick is the least. For this reason, it would have the least amount of inertia and least amount of force is required to change its state of motion or rest.
Gordon throws a baseball into the air. It rises, stops when it reaches its greatest height, and then falls back to the ground. At what point does the kinetic energy converted to potential energy?
A. While the baseball is rising
B. While the baseball is falling
C. While the baseball sits i the ground
D. While the baseball is stopped in the air
That would be when the baseball is rising. The energy from the throw is kinetic energy.
How many milliliters of 0.0050 N KOH are required to neutralize 53 mL of 0.0050 N H2SO4 ?
In a neutralization reaction, equivalent volumes of solutions with equal normality will neutralize each other. Thus, 53 mL of 0.0050 N KOH will neutralize 53 mL of 0.0050 N H2SO4.
Explanation:To answer the question 'How many milliliters of 0.0050 N KOH are required to neutralize 53 mL of 0.0050 N H2SO4 ?', we must understand the concept of neutralization in the context of acid-base reactions. Neutralization occurs when an acid reacts with a base to produce water and a salt, with no excess of hydrogen or hydroxide ions left in the solution.
In this case, the reaction is between KOH (Potassium Hydroxide, a base) and H2SO4 (Sulfuric Acid, an acid). As both solutions are of the same normality (0.0050 N), they will neutralize each other in equal volumes. Hence, 53 mL of 0.0050 N KOH are required to neutralize 53 mL of 0.0050 N H2SO4.
This concept ties into titration, a technique where a solution of known concentration (in this case, KOH) is used to determine the concentration of an unknown solution (H2SO4). It's important to note that this is a simplified example as it assumes 1:1 stoichiometry. For other reactions, it might be necessary to take into account the stoichiometric coefficients in the balanced chemical equation.
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what is the molarity of 60 grams of NaOh dissolved in 750
Answer:
Here we need to find the morality of 60 grams of NaOH dissolved in 750ml because the amount of solute is usually taken in ml and 750 litres is way to high.
So, coming towards the question, we need to find molarity.
As we know, molarity is no of moles of a substance per litre of the solution.
Molarity= mole\volume ----> 1
Now we will change 750ml to litres
750/1000 = 0.75 litres
Now we need to find no of moles of NaOH.
As we know, no of moles = mass /molar mass
no of moles =60 grams / 40
no of moles= 1.5 moles
Putting the values of no of moles and volume in equation 1
Molarity= mole\volume ----> 1
=1.5 moles/ 0.75 litres
=2 M
So the answer will be 2 Molar.
It would mean the world to me if you could help!!!! Brainliest!
1) Answer is: limiting reagent is hydrochloric acid.
Balanced chemical reaction: Mg + 2HCl → MgCl₂ + H₂.
m(Mg) = 25 g; mass of magnesium.
n(Mg) = m(Mg) ÷ M(Mg).
n(Mg) = 25 g ÷ 24.3 g/mol.
n(Mg) = 1.03 mol; amount of magnesium.
m(HCl) = 20 g; mass of hydrochloric acid.
M(HCl) = 36.46 g/mol; molar mass of hydrochloric acid.
n(HCl) = m(HCl) ÷ M(HCl).
n(HCl) = 20 g ÷ 36.46 g/mol.
n(HCl) = 0.55 mol; amount of hydrochloric acid.
2) From balanced chemical reaction: n(Mg) : n(HCl) = 1 : 2.
For 1.03 moles of magnesium 2.06 moles of hydrochloric acid is needed.
n(Mg) = n(HCl) ÷ 2.
n(Mg) = 0.55 mol ÷2.
n(Mg) = 0.225 mol.
m(Mg) = 0.225 mol · 24.3 g/mol.
m(Mg) = 6.66 g; mass of magnesium that reacts.
Δm(Mg) = 25 g - 6.66 g.
Δm(Mg) = 18.33 g; the excess reagent remains.
1) We know that there are 6.023 X 10^23 number of atoms or molecules or ions in one mole of a substance
In case of Magnesium it will have 6.023 X 10^23 number of atoms in one mole
The molar mass of Mg is 24 g/mol
so the mass of one mole of Mg will be 24g
Now moles of Mg in 35 grams = 35 / 24 = 1.458 moles
so number of atoms in 35g = moles X Na
[Where Na = Avagadro's number = 6.023 X 10^23]
number of atoms of Magnesium in 35g
= 1.458 X 6.023 X 10^23 = 8.78 X 10^23 atoms
2) The reaction is
Mg(s) + 2HCl ---> MgCl2(aq) + H2(g)
So here one mole of Mg is reacting with two moles of HCl
The molar mass of Mg is 24 g/mol
so the mass of one mole of Mg will be 24g
The moles of Mg in 25 grams = 25 / 24 = 1.04 moles
similarly, Molar mass of HCl = 36.5 g / mol
So mass of one mole of HCl = 36.5 g
The moles of HCl in 20g = 20 / 36.5 = 0.548 moles
Here for one mole of Mg we need two moles of HCl so for 1.04 moles of Mg we will need 2.08 moles of HCl
However we are provided with just 0.548 moles of HCl, hence HCl is the limiting reagent.
0.548 moles of HCl will react with 0.548 /2 moles of Mg
the moles of Mg reacted = 0.274 moles
Moles of excess Mg left = 1.04 - 0.274 = 0.766 moles
Mass of Mg left = moles left X molar mass = 0.766 X 24 = 18.38 g
What is the empirical formula of a compound that breaks down into 4.12g of N and 0.88g of H? Please explain why.
Answer:
nh3
Explanation:
The density of red wine is 1.01g/cm3 and the density of olive oil is 0.92g/cm3.A salad dressing that consisted of these two ingredients was left sitting too long.The ingredients separated in the bottle ,which ingredient is which layer?Explain.
the red wine is the densest so, it will be on bottom olive oil will be on the top. because its less than the red wine
how many moles of methane (CH4) are in 7.31 x 10^25 molecules
molar mass of methane CH4
= C + 4 H
= 12.0 + 4 x 1.008
= 12.0 + 4.032
= 16.042g/mol
7.31 x 10^25 molecules x 1 mole CH4 = 121.43 moles
6.02 x 10^23 CH4 molecules
121.43 moles CH4 are present.
Answer : The number of moles of methane are, 121.39 moles
Explanation : Given,
Number of molecules of methane gas = [tex]7.31\times 10^{25}[/tex]
Now we have to calculate the number of moles of methane gas.
As, [tex]6.022\times 10^{23}[/tex] number of molecules of methane present in 1 mole of methane gas.
So, [tex]7.31\times 10^{25}[/tex] number of molecules of methane present in [tex]\frac{7.31\times 10^{25}}{6.022\times 10^{23}}\times 1mole=121.39[/tex] moles of methane gas.
Therefore, the number of moles of methane are, 121.39 moles
The bird called the cattle egret follows large animals, such as rhinoceroses, elephants, cows, or antelope. The bird stays near them as they graze in the grasses, and eats the insects in the grass which get disturbed by the larger animals. Below is a picture of two cattle egrets near a pair of antelope.
Which of these animals gets something useful from the other in this relationship?
A.
The egret gets something useful from the antelope only.
B.
Neither animal gets anything useful from the other.
C.
The antelope gets something useful from the egret only.
D.
They each get something useful from the other.
Answer:
They Both get benefited
Explanation:
Final answer:
In the relationship described, cattle egrets benefit by eating insects disturbed by grazing antelope, making it a commensal relationship where egrets benefit and antelope are typically unaffected. The correct answer to the question is A, with egrets gaining a food source from the activity of the antelope. So the correct option is A.
Explanation:
The relationship between cattle egrets and large grazing animals like rhinoceroses, elephants, antelope, and cows is a wonderful example of commensalism in nature. When large animals graze, they disturb insects in the grass, which the cattle egrets then feed on. This relationship is beneficial to the egrets as they gain a food source, but the large animals are neither harmed nor specifically benefitted by the presence of the egrets. However, sometimes there might be a slight advantage to the large animals if the egrets do remove pests like ticks or fleas, but this isn't the primary interaction.
Considering the relation between the cattle egrets and the antelope in the provided scenario, the most accurate answer would be:
A. The egret gets something useful from the antelope only.This conclusion is based on the context of the question highlighting the egrets eating insects or small mammals that are disturbed by the grazing antelope.
Which is the chemical formula for iron(II) chloride tetrahydrate? A. FeCl2•4H2O B. FeCl3•6H2O C. FeCl2•3H2O D. FeCl3•4H2O
I would have to say A. FeCl2•4H2O
I hope this helps!
Cheers, July. :)
what does crystalize mean
crystalize - cause to form crystals or assume crystalline form; "crystallize minerals" crystalise, crystallise, crystallize. natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"
Which of the following is the only metal that is liquid at room temperature?
A. Nickel
B. Magnesium
C. Sodium
D. Mercury