A piece of metal has a mass of 114g and a volume of 10.0 cm³. What is the density of the metal?

Answer:

200.0lg

Explanation:

please give a brainliest

Answer:

a. The Zn and HCl both retained their identity.

Answer:

If Mountain lions are removed from a habitat/ecosystem, their prey will overpopulate, which may lead to extinctions on the pray of the secondary consumers. ex. A mountain lion would eat rabbits who eat berries, if there are no mountain lions to kill the rabbits, then the berries may be scarce

Explanation:

bc i know everthing

What happens to the energy produced by blocks of Earth's crust slipping past each other is it radiates outward in all directions. (Option C).

When blocks of the Earth's crust slip past each other during an earthquake, the energy that is released does not disappear, spread out randomly, or increase as it reaches the surface.

Instead, the energy radiates outward in the form of seismic waves. These seismic waves travel through the Earth in all directions from the point of the earthquake's origin causing the ground to shake.

The energy carried by these waves is what is felt as the shaking during an earthquake and can be detected and measured by seismometers.

Thus, what happens to the energy produced by blocks of Earth's crust slipping past each other is it radiates outward in all directions.

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Answer:

i) The size of X ion is greater than that of X atom even though both contain the same number of protons because the ion has fewer electrons compared to the atom. When an atom forms an anion (negative ion), it gains electrons, which causes increased electron-electron repulsion. This repulsion causes the electron cloud to expand, and as a result, the ion becomes larger than the neutral atom.

In the case of element X, when it forms an ion with a -3 charge, it will gain 3 more electrons, increasing the total number of electrons to 18. This will cause the size of the X ion to be larger than the neutral X atom.

ii) To determine the compound of X in the -3 oxidation state, we first need to determine the element's identity. We know that X has 15 electrons in total (2 in the K shell, 8 in the L shell, and 5 in the M shell). Therefore, X has an atomic number of 15, which corresponds to phosphorus (P).

Since phosphorus is in the -3 oxidation state, it gains 3 electrons and becomes P^3-. To form a compound, we need a cation that can balance the negative charge. A common example is aluminum (Al), which has a +3 charge (Al^3+). When phosphorus and aluminum combine, they form the compound aluminum phosphide with the formula AlP.

The question requires us to calculate the amount of energy absorbed by the reaction, considering the molar enthalpy for oxygen gas (O2) and that 80.6 g of oxygen were reacting.

The following information was provided by the question:

Balanced chemical reaction:

Molar enthalpy of reaction for O2: +499.0 kJ/mol

Mass of O2 reacting: 80.6 g

To solve this problem, we need to calculate the amount of moles that corresponds to the mass of O2 given and then use this value and the molar enthalpy provided to calculate how much heat would be absorbed by the reaction.

First, we need the molar mass of O2. Knowing that the atomic mass of O is 15.99 u:

molar mass (O2) = (2 * 15.99) = 31.98 g/mol

Now, we use the molar mass to calculate the number of moles in 80.6 g of O2:

31.98 g O2 ------------------------ 1 mol O2

80.6 g O2 ------------------------- x

Solving for x, we'll have:

There are 2.52 moles of O2 reacting and next we need to calculate the amount of heat absorbed considering this.

The molar enthalpy of O2 tells us how much heat is abosrbed when 1 mol of O2 reacts. Thus, we can use it to calculate the amount of heat absorbed when 2.52 moles of O2 react:

1 mol O2 ----------------------- 499.0 kJ

2.52 mol O2 ----------------- y

Solving for y, we'll have:

Therefore, 1257.5 kJ of energy are absorbed when 80.6 g of O2 are reacting.

We can fill in the boxes to answer the question as it follows:

Answer: 1257.5

Units: kJ

Answer:

it is cold inside in the store

The equilibrium constant (Kc) for the given reaction is approximately 16.448. The value of Kc indicates the relative concentrations of reactants and products at equilibrium. In this case, a Kc greater than 1 suggests that the products (H2 and P4) are favored at equilibrium, indicating that the forward reaction is more favorable.

To determine the equilibrium constant (Kc) for the given reaction:

4PH3(g) ↔ 6H2(g) + P4(g)

We can write the equilibrium constant expression based on the stoichiometric coefficients:

Kc = ([H2]^6 * [P4]) / ([PH3]^4)

Substituting the given equilibrium concentrations:

[PH3] = 0.250 M

[H2] = 0.580 M

[P4] = 0.750 M

We can plug in these values into the equilibrium constant expression:

Kc = ([0.580]^6 * [0.750]) / ([0.250]^4)

Kc = (0.0860128 * 0.750) / (0.00390625)

Kc = 16.448

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The balanced equation of the redox reaction is given as follows:

The balanced equation of the reaction is determined using the half-reaction method.

The given equation of the redox reaction is:

H₆TeO₆ + Br₂ ----> TeO₂ + BrO₃⁻

Reduction half-reaction:

H₆TeO₆ → TeO₂

The oxidation state of Te changes from +6 to +4, showing that it has lost gained electrons.

H₆TeO₆ → TeO₂ + 2e⁻

Oxidation half-reaction:

Br₂ → BrO₃⁻

The oxidation state of Br changes from 0 to +5, showing that it has lost five electrons.

Balancing the electrons transferred and the atoms by adding electrons, H₂O, and H⁺ to the appropriate sides:

Br₂ + 6 H₂O → 2 BrO₃⁻ + 12 H⁺ + 10 e⁻

The number of electrons transferred in both half-reactions balanced is  by multiplying the oxidation half-reaction by 5 and the reduction half-reaction by 2:

5 (H₆TeO₆ → TeO₂ + 2 e⁻) → 5 H₆TeO₆ → 5 TeO₂ + 10 e⁻

2 * (Br₂ + 6H₂O → 2 BrO₃⁻ + 12 H⁺ + 10e⁻) → 2 Br₂ + 12 H₂O → 4 BrO₃⁻ + 24 H⁺ + 20 e⁻

The two half-reactions are added together and the electrons are canceled out to obtain the balanced redox reaction:

5 H₆TeO₆ + 2 Br₂ + 12 H₂O → 5 TeO₂ + 4 BrO₃⁻ + 24 H⁺

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The volume of hydrogen gas produced in the reaction of 73 grams of zinc and 73 grams of hydrochloric acid (under normal conditions) is approximately 22.4 liters.

To calculate the volume of hydrogen gas produced in the reaction of zinc and hydrochloric acid, we need to use the principles of stoichiometry and the ideal gas law.

First, let's write the balanced chemical equation for the reaction between zinc (Zn) and hydrochloric acid (HCl):

Zn + 2HCl →\(ZnCl_2\)+ H2

From the equation, we can see that one mole of zinc reacts with two moles of hydrochloric acid to produce one mole of hydrogen gas. To determine the number of moles of zinc and hydrochloric acid, we need to convert the given masses into moles.

The molar mass of zinc (Zn) is approximately 65.38 g/mol, so 73 grams of zinc is equal to:

73 g Zn * (1 mol Zn / 65.38 g Zn) ≈ 1.116 mol Zn

Similarly, the molar mass of hydrochloric acid (HCl) is approximately 36.46 g/mol, so 73 grams of HCl is equal to:

73 g HCl * (1 mol HCl / 36.46 g HCl) ≈ 2.002 mol HCl

According to the balanced equation, the reaction produces one mole of hydrogen gas for every two moles of hydrochloric acid. Therefore, since we have 2.002 moles of HCl, we expect to produce half that amount, or approximately 1.001 moles of hydrogen gas.

To calculate the volume of hydrogen gas, we can use the ideal gas law, which states:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. In this case, we assume the reaction is conducted under normal conditions, which means a pressure of 1 atmosphere and a temperature of 273.15 Kelvin.

Rearranging the equation to solve for V, we have:

V = nRT / P

Substituting the values, we get:

V = (1.001 mol) * (0.0821 L·atm/(mol·K)) * (273.15 K) / (1 atm) ≈ 22.4 L

Therefore, the volume of hydrogen gas produced in the reaction is approximately 22.4 liters.

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answer

1 L will react with 3 L of Hydrogen

explanation.

the mol ration of nitrogen to hydrogen according to the balance chemical equation is 1:3

Answer:

Explanation:

Be careful. The tricky part of the problem is that there are 4 places of sig digs.

m = 6.557 grams

V = 11.16 - 10.50 = 0.66

density = mass/ volume

density = 6.557/0.66 = 9.935 g/mL

Answer: a) sp and sp hybrid orbitals:

180 degrees

(b) sp and sp hybrid orbitals:

es

120 degrees

(c) sp and sp2 hybrid orbitals:

109.5 degrees

Explanation:

The angle between the following two hybrid orbitals on the same atom is sp and sp hybrid orbitals: 180°, sp and sp hybrid orbitals: 120° and sp and sp2 hybrid orbitals: 109.5°

Hybrid orbitals are defined as the outcome of a model that generates a new set of orbitals by combining atomic orbitals on a single atom.

It can also be defined as a form of atomic orbital that emerges when two or more atomic orbitals of an isolated atom mix.

It can be defined as the forming new atomic orbitals by combining two or more common atomic orbitals.

The process which forms hybrid orbitals are known as hybridization.

There are mainly five types of hybridization.

Thus, the angle between the following two hybrid orbitals on the same atom is sp and sp hybrid orbitals: 180°, sp and sp hybrid orbitals: 120° and sp and sp2 hybrid orbitals: 109.5°

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Fill to the 250-mL mark with water after mixing a tiny amount of water with the solute to dissolve it.

Explanation:

Please send me the answer of this question

The quantity of moles in 57.0grams of RbF is 0.545mol.

Moles is the base unit of amount of substance i.e. the amount of substance of a system which contains exactly 6.022 × 10²³ elementary entities (atoms, ions, molecules, etc.).

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass.

No of moles = mass ÷ molar mass

Molar mass of RbF = 85.467 + 18.998 = 104.5g/mol

moles = 57.0g ÷ 104.5g/mol = 0.545mol

Therefore, 0.545moles is the quantity of moles of RbF in 57.0grams of the compound.

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The amount, in kJ, of heat needed to completely vaporize 50.0g of water at 100°C is 118.8 kJ.

The heat needed to completely vaporize 50.0g of water at 100°C can be calculated using the following formula:

q = m x Hv

where:

First, we need to convert 50.0g to moles by dividing by the molar mass of water which is approximately 18.015 g/mol3:

moles of water = 50.0 g / 18.015 g/mol moles of water = 2.776 mol

Thus:

q = (2.776 mol) x (40.65 kJ/mol) q = 112.8 kJ

In other words, 112.8 kJ of heat is needed to completely vaporize 50.0g of water at 100°C.

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Answer:

last one

Explanation:

makes the most sense

Answer:

Bailee is incorrect. The mass of objects stay the same but the weight will change.

Explanation:

Mass is how much space something takes up, so that wouldn't change on the moon. The weight however would change because the gravitational pull on the earth is different from that on the moon.

I hope this helps!

Bailee explained that when traveling to the moon. The statement of Bailee is incorrect. The mass of the objects stays the same, but the weight will change. The correct option is B.

Gravity is a force that pulls all objects towards itself. It is present on the earth and in the galaxy. Gravity is the cause of all planets, and the sun and the moon stay in their own places.

The weight of items on the moon is equal to their weight on Earth, according to Bailee, thus he needs only bring a small amount of luggage. The mass is the quantity of matter. The mass never changes, only the weight changes of an object when they are on different planets.

Thus, the correct option is B. The mass of the objects stays the same, but the weight will change.

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The correct answer is "C.

The type of exercise that Mei is doing is the "Machine exercise."

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Answer:

a) The balloon will attract the soda can, while the two balloons will repel each other.

NH3 is the chemical compound produced as a product in the given balanced chemical equation.

With the formula NH3, ammonia is a nitrogen and hydrogen inorganic chemical. A Lewis base is urea. Ammonia is a colourless, extremely unpleasant gas that has a strong, suffocating stink when it is present at room temperature. It is hygroscopic and known as anhydrous ammonia in its pure state (readily absorbs moisture). Ammonia is corrosive and has alkaline qualities.

Water molecules' shared dipoles and development of hydrogen bonds with one another account for this. As a consequence, the molecules of water and ammonia are both made up of dipoles that exert significant electrostatic forces on one another.

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There are 90.0 g of F are present in 185 g of CaF₂. In chemistry, a mole, usually spelled mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, or other predetermined particles.

According to question, mass of CaF₂ = 185 g

It is required to calculate the moles of CaF₂

Moles of CaF₂ = 185 g / 78.074 g.mol-1

= 2.369 mole of CaF₂

Now find the moles of F from the moles of CaF₂

1 mole of CaF₂ = 2 moles of F

2.369 mole of CaF₂ = ?

= 4.74 moles of F

Now change the mole to gram of F

Mass of F = 4.74 moles of F × 18.998 g/mol

= 90.03 g of F

Thus, 90.0 g of F are in 185 g of CaF₂.

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Some of the essential features of computers:

1. Processing Power

2. Storage Capacity

3. Memory

4. Input and Output

5. Connectivity

6. Software

7. Multitasking

8. Scalability

9. Reliability and Durability

10. User Interface

Computers are complex machines that have become an integral part of our daily lives. They possess several key features that enable them to perform a wide range of tasks efficiently. Here are some of the essential features of computers:

1. Processing Power: Computers are capable of executing complex calculations and tasks at incredible speed. They contain powerful processors that can perform billions of operations per second, enabling them to handle various applications and processes.

2. Storage Capacity: Computers have the ability to store and retrieve vast amounts of data. They come equipped with different types of storage devices such as hard drives, solid-state drives (SSDs), and cloud storage, providing ample space for storing files, programs, and operating systems.

3. Memory: Computers have two primary types of memory: RAM (Random Access Memory) and ROM (Read-Only Memory). RAM provides temporary storage for data and instructions that the computer is actively using, while ROM contains firmware and permanent instructions that are essential for booting up the computer.

4. Input and Output: Computers allow users to interact with them through various input and output devices. Input devices include keyboards, mice, touchscreens, and microphones, while output devices include monitors, printers, speakers, and headphones. These devices enable users to input commands and receive feedback from the computer.

5. Connectivity: Computers can connect to networks and other devices, enabling communication and data transfer. They have built-in network adapters and support for various connectivity options such as Ethernet, Wi-Fi, Bluetooth, and USB, allowing users to access the internet, share files, and connect to peripherals.

6. Software: Computers run on software, including operating systems, applications, and utilities. The software provides the instructions and programs that allow users to perform tasks, manipulate data, and manage hardware resources.

7. Multitasking: Computers are designed to handle multiple tasks simultaneously. They can execute multiple programs concurrently, switch between tasks rapidly, and allocate system resources efficiently, providing users with the ability to multitask and enhance productivity.

8. Scalability: Computers offer scalability, allowing users to upgrade hardware components and expand storage capacity as needed. This feature ensures that computers can adapt to evolving technological demands and accommodate future growth.

9. Reliability and Durability: Computers are designed to be reliable and durable. They undergo rigorous testing and are built with high-quality components to ensure stable performance and withstand daily use.

10. User Interface: Computers provide graphical user interfaces (GUIs) that enable users to interact with the system easily. GUIs utilize visual elements such as icons, windows, and menus, making it intuitive for users to navigate and access various functions.

These features collectively make computers versatile, powerful, and indispensable tools in our modern world, enabling us to accomplish a wide range of tasks efficiently and effectively.

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Answer:

Cvapor = 2.03 J/(g·°C)heu

Choosing a biome for a research project can provide a wealth of opportunities to better understand the natural world and contribute to important conservation and management efforts.

There are several convincing reasons for researchers to choose a particular biome for their project, some of which include:

Biodiversity: Biomes are characterized by their unique plant and animal species, which can provide a diverse range of research opportunities, including studying their adaptations, behaviors, and interactions.

Climate Change: Biomes are also influenced by climate change, making them an important area of research to better understand how these ecosystems are being affected by changes in temperature and precipitation patterns.

Human Impacts: Human activities, such as deforestation, agriculture, and urbanization, can have a significant impact on biomes. Studying these impacts can help researchers better understand how to mitigate and manage these effects.

Biogeochemical Cycles: Biomes are also important for studying biogeochemical cycles, such as the carbon and nitrogen cycles, which are essential for sustaining life on Earth.

Conservation: Finally, studying biomes can also contribute to conservation efforts, helping to preserve these unique ecosystems and the species that inhabit them.

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Answer:

Yes

Explanation:

I doesn't change the substance or the chemical properties of the substance.

Answer: it is B

Explanation: