Calculate the number of total atoms in 195 grams of Ni(OH)2. Use 6.022x10^23mol-1 for Avogadro’a number

The value of the solubility product constant (Ksp) for the salt AB at 25°C is 2.60 x 10⁻³.

The solubility product constant (Ksp) is the equilibrium constant for the dissolution of a sparingly soluble salt in water. It is given by the expression Ksp = [A⁺][B⁻] where [A⁺] and [B⁻] are the molar concentrations of the cations and anions in solution, respectively.

In this case, the balanced equation for the dissolution of the salt AB is: AB(s) ⇌ A⁺(aq) + B⁻(aq) We know that at 25°C, only 0.0510 mol of the salt AB is soluble in 1.00 L of water. This corresponds to a molar solubility of

s = 0.0510 mol / 1.00 L = 0.0510 M

At equilibrium, the molar concentration of A⁺ and B⁻ will also be 0.0510 M. Therefore, the value of Ksp for the salt AB at 25°C can be calculated as: Ksp = [A⁺][B⁻] = (0.0510 M) * (0.0510 M) = 2.60 x 10⁻³.

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C. The pH stays about the same.

Answer:

C.The pH stays about the same.

Explanation:

Buffer reactions maintain stable pH of solutions.

Answer:

The correct answer is a

Explanation:

The formula for density is mass ÷ volume. Hence, a balance is required to determine the mass while a measuring/graduated cylinder is required to determine the volume.

The ideal measuring cylinder and balance to be used should have an uncertainty of just 0.1 ml and 0.1 g respectively. This reduces the chances of the answer gotten from the formula above to be more than 3 significant figures.

For example, if the volume to be used is 4.0 ml and the mass of this volume is 3.5 g, the density will be

Density = 3.5 ÷ 4

Density = 0.875 g/cm³ or 0.875 g/ml

NOTE that cm³ is the same measurement as mL

The answer above is in 3 significant figures

Answer:

D

Explanation:

The unit used to measure atomic mass is the atomic mass unit (amu). A single amu is equivalent to 1/12 the mass of an atom from the carbon-12 isotopIsotopes with different numbers of protons and neutrons will have an actual mass slightly different from the atomic mass calculated in atomic mass units.

From the attached image, the volume of the air column is 300 mL and the temperature of the gas is 3°C.

The relationship between the temperature and the volume of a given mass of air is described by the gas law known as Charles's law. According to this law, the volume of a fixed amount of gas (such as air) held at constant pressure is directly proportional to its absolute temperature (measured in Kelvin). In other words, as the temperature of the air increases, its volume will also increase, and vice versa.

Mathematically, Charles's law can be expressed as:

V ∝ T

where V is the volume of the gas, T is its absolute temperature, and the symbol "∝" means "is proportional to".

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Answer:

zinc + hydrochloric acid = zinc chloride + hydrogen

copper carbonate + sulfuric acid = copper sulfate + carbon dioxide + water

copper + nitric acid = copper nitrate + nitrogen dioxide + water

Explanation:

Zn + 2HCl → ZnCl2 + H2

CuCO3 + H2SO4 → CuSO4 + CO2 + H2O

Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H2O

Answer:

zinc + hydrochloric acid = zinc chloride + hydrogen

copper carbonate + sulfuric acid = copper sulfate + carbon dioxide + water

zinc + nitric acid = zinc nitrate + hydrogen gas + water

Answer:

a drink my guy

Explanation:

just frozen

Answer:these remove the nitrate from. The water - plants

These produce waste that contains ammonia- fish

These convert ammonia into nitrate-bacteria

Explanation:

Plants remove the nitrate from the water, fishes produce waste that contains ammonia, and bacteria convert ammonia into nitrate.

An aquaponics system is a sustainable method of agriculture that combines aquaculture with hydroponics. In this system, fish or other aquatic animals are kept in a tank or pond. The fish produce waste in the form of ammonia-rich water.

This wastewater is then circulated to the hydroponic component of the system, where plants are grown in a soil-less medium or directly in water. Beneficial bacteria in the system convert ammonia into nitrites and then nitrates, which are essential nutrients for plants.

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The measure of the length of events and the duration of intervals between events is time.

The duration of events or the gaps between them can be measured, compared, or even ordered using time. The lengthy period of time that the Earth's geologic history takes up is known as geologic time. Starting at the beginning of the Archean Eon  formal geologic time runs until the present. Geology is defined as the "Science of the Earth."

Geology is the fundamental Earth science that examines how the earth created, its structure and composition, and the various forces acting on it. It is sometimes known as geoscience or earth science.

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The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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Convection currents. Convection currents. allow hot air balloons to rise and explain why it is generally hotter upstairs than downstairs in dwellings.

Heat transfer is a thermal engineering subject that deals with the generation, consumption, conversion, and exchange of thermal energy between physical systems.

Heat transmission is categorized into several methods, including thermal conduction, thermal convection, thermal radiation, and energy transfer via phase shifts.

The Transfer of Heat Energy

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9. The number of mole of the argon contained in the tank is 2.39 moles

10. The volume (in liters) of H₂O produced from the reaction is 73.5 liters

The number of mole of the argon contained in the tank can be obtained as follow:

PV = nRT

Inputting the given parameters, we have:

9.4 × 6.25 = n × 0.0821 × 299

Divide both sides by (0.0821 × 299)

n = (9.4 × 6.25) / (0.0821 × 299)

n = 2.39 moles

Thus, the number of mole of the argon gas in the tank is 2.39 moles

The volume of H₂O produced can be obtained as shown below:

4NH₃(g) + 5O₂(g) -> 6H₂O(g) + 4NO(g)

From the balanced equation above,

4 liters of NH₃ reacted to produced 6 liters of H₂O

Therefore,

49 liters of NH₃ will react to produce = (49 × 6) / 4 = 73.5 liters of H₂O

Thus, the volume of H₂O produced is 73.5 liters

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Answer:

Fatty foods become rancid due to the process of rancidity

Answer:

answer is 607000 milligrams

Answer: A

Explanation:

As one increases the other goes in a straight line.  It is called a direct proportionality.  Forms a linear graph.

Diatomic

consist of two atoms bonded together. In contrast, monatomic elements consist of single atoms (e.g., Ar, He). Many compounds are diatomic, such as HCl, NaCl, and KBr. Diatomic compounds consist of two different elements. There are seven pure elements that form diatomic molecules.

Key Takeaways: Diatomic Elements

Diatomic elements are pure elements that form molecules consisting of two atoms bonded together.

There are seven diatomic elements: hydrogen, nitrogen, oxygen, fluorine, chlorine, iodine, bromine.

These elements can exist in pure form in other arrangements. For example, oxygen can exist as the triatomic molecule, ozone.

This is a list of the seven diatomic elements. The seven diatomic elements are:

Hydrogen (H2)

Nitrogen (N2)

Oxygen (O2)

Fluorine (F2)

Chlorine (Cl2)

Iodine (I2)

Bromine (Br2)

All of these elements are nonmetals, since the halogens are a special type of nonmetallic element. Bromine is a liquid at room temperature, while the other elements all gases under ordinary conditions. As the temperature is lowered or pressure is increased, the other elements become diatomic liquids.

Astatine (atomic number 85, symbol At) and tennessine (atomic number 117, symbol Ts) are also in the halogen group and may form diatomic molecules. However, some scientists predict tennessine may behave more like a noble gas.

While only these seven elements routinely form diatomic molecules, other elements can form them. However, diatomic molecules formed by other elements are not very stable, so their bonds are easily broken.

compounds

are formed by the chemical combination of two or more element. example water is a compound because two elements water and hydrogen come to form it.

Answer:

you know how when you jump, you don't go flying away, that's because of a thing called gravity, it keeps everyone from floating into the sky.

Answer: if you were jumping on the bed you don’t just fly off right?! That’s crazy! Gravity keeps us from falling of the earth!

Explanation:

Answer:

A

Explanation:

Sucrose and water are both compounds made up of more than one type of atom.

Water(H2O)= Hydrogen and Oxygen

Sucrose(C12H22O11)= Carbon Hydrogen & Oxygen

Answer:

1,869.97 grams of Be(NO3)2

Explanation:

Be(NO3)2 = Be  N2  O6

Be=9.012182g/mole

N2=28.0134g/mole

O6=96g/mole

therefore Be(NO3)2 gives you 187.56g in one mole

so 9.97 moles means there is 9.97 times more

9.97mole Be(NO3)2 * 187.56g Be(NO3)2/1mole Be(NO3)2 = 1,869.97g of Be(NO3)2

Answer:

Evaluate the result (Apex)

Explanation:

Answer:

An alloy is a homogeneous mixture

Explanation:

D

An alloy, a metallic substance composed of two or more elements, as either a compound or a solution is a homogeneous mixture. The correct option is d.

An alloy is a mixture of chemical elements of which at least one is a metal. Unlike chemical compounds with metallic bases, an alloy will retain all the properties of metal in the resulting material, such as electrical conductivity, ductility, opacity, and lustre, but may have properties that differ from those of pure metals, such as increased strength or hardness.

In some cases, an alloy may reduce the overall cost of the material while preserving important properties. In other cases, the mixture imparts synergistic properties to the constituent metal elements such as corrosion resistance or mechanical strength. Alloys are defined by a metallic bonding character. The alloy constituents are usually measured by mass percentage for practical applications, and in atomic fraction for basic science studies.

Alloys are usually classified as substitutional or interstitial alloys, depending on the atomic arrangement that forms the alloy.

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Answer:

B. are electrical signals.

Answer:

The person above me is correct  

Explanation:

It's D

Answer:

Element X with atomic number 10 and atomic mass 21

Element Z with atomic number 10 and atomic mass 22

Explanation:

Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons in their various nuclei.

So, Element X and Z with atomic number 10 which is their number of electrons are isotopes. Their mass number, 21 and 22 differs.

Answer:

To answer this question, we will need to use the gas law which states that:

PV = nRT where:

P is the pressure of the gas = 740 mmHg = 98658.550357 Pascal

V is the volume = 450 ml = 0.45 liters

n is the number of moles that we will calculate

R is the gas constant =  8.314 J/(K. mol)

T is the temperature = 35 celcius = 308 degrees kelvin

Substitute with these values in the above equation to get the number of moles as follows:

98658.550357 * 0.45 = n * 8.314 * 308

n = 17.3375 moles

Each mole contains Avogadro's number of atoms, therefore:

number of atoms = 17.3375 * 6.02 * 10^23 = 1.0437 * 10^25 atoms

The thickness of the aluminum is approximately 0.00172 cm or 0.0172 mm

To calculate the thickness of the aluminum, we need to use the formula:

Density = Mass / (Length x Width x Thickness)

Given:

Mass of aluminum = 0.475 g

Length of aluminum = 10.08 cm

Width of aluminum = 10.08 cm

We need to rearrange the formula to solve for thickness:

Thickness = Mass / (Length x Width x Density)

The density of aluminum is approximately 2.7 g/cm³.

Now we can substitute the given values into the formula:

Thickness = 0.475 g / (10.08 cm x 10.08 cm x 2.7 g/cm³)

Thickness ≈ 0.475 g / (102.4064 cm² x 2.7 g/cm³)

Thickness ≈ 0.475 g / 275.879104 cm³

Thickness ≈ 0.00172 cm or 0.0172 mm

Therefore, the thickness of the aluminum is approximately 0.00172 cm or 0.0172 mm.

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Answer:

0.189 g

Explanation:

Step 1: Write the balanced equation

NCl₃ + 3 H₂O ⇒ NH₃ + 3 HCIO

Step 2: Calculate the moles corresponding to 1.33 g of NCl₃

The molar mass of NCl₃ is 120.36 g/mol.

1.33 g × 1 mol/120.36 g = 0.0111 mol

Step 3: Calculate the moles of NH₃ produced from 0.0111 moles of NCl₃

The molar ratio of NCl₃ to NH₃ is 1:1. The moles of NH₃ produced are 1/1 × 0.0111 mol = 0.0111 mol.

Step 4: Calculate the mass corresponding to 0.0111 moles of NH₃

The molar mass of NH₃ is 17.03 g/mol.

0.0111 mol × 17.03 g/mol = 0.189 g

The reaction time decreases as the temperature increases of the reaction mixture increases.

A sample record of results is:

An increase in temperature leads to an increase in reaction rate or a decrease in reaction time.

The increase in temperature provides more thermal energy to the reactant molecules, which leads to an increase in the average kinetic energy of the molecules. As a result, more reactant molecules have sufficient energy to overcome the activation energy barrier and undergo successful collisions, leading to an increased reaction rate.

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Answer:

Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.

Explanation:

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