How many grams of hydrogen must react to produce 31. 5 grams of ammonia?.

Answer:

Ceramics can be used in items where insulation is required or is preferred for the usage of the item. Examples would be bowls, plates, mugs, vases, pots, and other various items.

Explanation:

The reason why ceramics are often used in these items is due to the various properties that ceramics possess. As stated in the question, they are resistant to moisture, don't conduct electricity, and can withstand high temperatures.

Answer:can be used in a place where electric conductivity is not needed and in a place where moisture is not needed.

Explanation:we use ceramics for our bath room mostly because moisture is not needed there

1. The molar mass of a compound is the sum of the atomic masses of all the atoms present in one molecule of the compound. To calculate the relative molecular mass (also called the molecular weight or molar mass) of a compound, we add up the atomic masses of all the atoms in the compound.

1a) H₂SO₄

The atomic masses of H, S, and O are 1.008, 32.06, and 16.00, respectively.

Relative molecular mass of H₂SO₄ = (2 x atomic mass of H) + atomic mass of S + (4 x atomic mass of O)

= (2 x 1.008) + 32.06 + (4 x 16.00)

= 98.08

1b) Ca(NO₃)₂

The atomic masses of Ca, N, and O are 40.08, 14.01, and 16.00, respectively.

Relative molecular mass of Ca(NO₃)₂ = atomic mass of Ca + (2 x atomic mass of N) + (6 x atomic mass of O)

= 40.08 + (2 x 14.01) + (6 x 16.00)

= 164.09

1c) CuSO₄.7H₂O

The atomic masses of Cu, S, O, and H are 63.55, 32.06, 16.00, and 1.008, respectively.

Relative molecular mass of CuSO₄.7H₂O = atomic mass of Cu + atomic mass of S + (4 x atomic mass of O) + (14 x atomic mass of H)

= 63.55 + 32.06 + (4 x 16.00) + (14 x 1.008)

= 249.69

2. An oxide of nitrogen contains only one nitrogen atom per molecule and has a relative molecular mass = 30. Determine its molecular formula.

The relative molecular mass of the oxide of nitrogen (NOx) is 30.

The atomic mass of N is 14.01, and the atomic mass of O is 16.00.

We can set up the equation: 14.01 + 16.00x = 30

Solving for x, we get x = 1.

Therefore, the molecular formula of the oxide of nitrogen is NO.

3. An oxide of nitrogen contains only one oxygen atom per molecule and has a relative molecular mass = 44. Determine its molecular formula.

The relative molecular mass of the oxide of nitrogen (NOx) is 44.

The atomic mass of N is 14.01, and the atomic mass of O is 16.00.

We can set up the equation: 14.01x + 16.00 = 44

Solving for x, we get x = 2.

Therefore, the molecular formula of the oxide of nitrogen is N₂O.

4. An oxide of sulfur contains only one sulfur atom per molecule and has a relative molecular mass = 80. Determine its molecular formula.

The relative molecular mass of the oxide of sulfur (SOx) is 80.

5. The atomic mass of S is 32.06, and the atomic mass of O is 16.00.

We can set up the equation: 32.06 + 16.00x = 80

Solving for x, we get x = 3.

Therefore, the molecular formula of the oxide of sulfur is SO₃.

6. The molar mass of the oxide of silicon (SiOx) is 60 g/mol.

The atomic mass of Si is 28.09, and the atomic mass of O is 16.00.

We can set up the equation: 28.09 + 16.00x = 60

Solving for x, we get x = 2.

Therefore, the molecular formula of the oxide of silicon is SiO₂.

1. The molar mass of Ar is 39.95 g/mol. Therefore, the number of moles of Ar in 8 g is:

moles = mass / molar mass = 8 g / 39.95 g/mol = 0.200 moles

2. The molar mass of H₂SO₄ is 98.08 g/mol (2 + 32 + 32 + 4x16). Therefore, the number of moles of H₂SO₄ in 1.25 kg is:

moles = mass / molar mass = 1250 g / 98.08 g/mol = 12.73 moles

3. The molar mass of Ca(OH)₂ is 74.09 g/mol (40.08 + 2x1.01 + 2x16.00). Therefore, the mass of 0.04 moles of Ca(OH)₂ is:

mass = moles x molar mass = 0.04 moles x 74.09 g/mol = 2.96 g

4. The molar mass of CuSO₄·5H₂O is 249.68 g/mol (63.55 + 32.07 + 4x16.00 + 5x18.02). Therefore, the mass of 0.001 moles of CuSO₄·5H₂O is:

mass = moles x molar mass = 0.001 moles x 249.68 g/mol = 0.250 g

5. The mass of the hydrocarbon is given as 6 g, and the number of moles is 0.2 moles. Therefore, the molar mass of the hydrocarbon is:

molar mass = mass / moles = 6 g / 0.2 moles = 30 g/mol

6. The mass of the oxide of nitrogen is given as 115 g, and the number of moles is 2.5 moles. Therefore, the molar mass of the oxide of nitrogen is:

molar mass = mass / moles = 115 g / 2.5 moles = 46 g/mol.

1.a) In 1 molecule of HCl, there is 1 hydrogen atom. Therefore, in 0.5 moles of HCl, there are:

0.5 moles HCl x 1 mole H per 1 mole HCl = 0.5 moles H

b) In 1 molecule of H₂O, there are 2 hydrogen atoms. Therefore, in 0.5 moles of H₂O, there are:

0.5 moles H₂O x 2 moles H per 1 mole H₂O = 1 mole H

c) In 1 molecule of Na₂CO₃, there are 3 oxygen atoms. Therefore, in 0.2 moles of Na₂CO₃, there are:

0.2 moles Na₂CO₃ x 3 moles O per 1 mole Na₂CO₃ = 0.6 moles O

d) In 1 molecule of MgCl₂, there are 2 chloride ions. Therefore, in 1.2 moles of MgCl₂, there are:

1.2 moles MgCl₂ x 2 moles Cl⁻ per 1 mole MgCl₂ = 2.4 moles Cl⁻

Molecular orientation. In collision theory, molecular orientation is a significant factor. The reaction rates of chemical processes are explained by collision theory. According to this theory, reactant molecules must collide with the proper orientation and sufficient energy for a reaction to take place.

Chemical properties of the reacting substances, the state of subdivision (one huge lump versus many little particles), temperature of the reactants, reactant concentration, and the presence of a catalyst are the five elements that commonly determine the rate of chemical reactions.

The collision theory states that "reactants are supposed to be hard spheres and reactions are assumed to occur only when these spheres (molecules) clash with one other."

The majority of reaction rates increase as concentrations rise, according to collision theory. Because there are more molecules per unit of volume, the likelihood of molecules colliding increases with an increase in the concentration of any reactive material.

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ANSWER

The mass of water is 0.0536 kg

STEP-BY-STEP EXPLANATION;

Given information

The mass of KNO3 = 175g

The molarity of the solution = 32.25 M

The molality formula is given below as

The first step is to find the mole of the solute using the below formula

Recall, the molar mass of KNO3 is 101.1032 g/mol

The second step is to find the mass of water using the molality formula

Hence, the mass of water is 0.0536 kg

Answer:

D

Explanation:

Because she is continuously using the same piece of clay, the mas does not change.

The pH of the solution containing 2.80 M acetic acid is 2.34.

Given, The Ka value for acetic acid, CH3COOH(aq), is 1.8x10^-5.Molar concentration of acetic acid, CH3COOH(aq), is 2.80 M.

Step 1 The equation for the ionization of acetic acid is as follows.CH3COOH(aq) + H2O(l) ⇆ H3O+(aq) + CH3COO-(aq)

Step 2Expression for Ka isKa = [H3O+][CH3COO-]/[CH3COOH(aq)]1.8 x 10-5 = [H3O+][CH3COO-]/2.80[H3O+] = √(Ka [CH3COOH(aq)]) = √(1.8 x 10-5 x 2.80) = 0.00462 M

Step 3pH = -log[H3O+] = -log(0.00462) = 2.34

So, the pH of the solution containing 2.80 M acetic acid is 2.34.

Acetic acid (CH3COOH) is a weak acid with a Ka value of 1.8x10⁻.

By utilizing this Ka value and the molar concentration of acetic acid, the pH of a 2.80 M acetic acid solution can be calculated.

Using the equation Ka = [H3O+][CH3COO-]/[CH3COOH(aq)], and after simplifying,

it can be determined that [H3O+] = √(Ka [CH3COOH(aq)]).

After substituting the values for Ka and [CH3COOH(aq)], [H3O+] is found to be 0.00462 M.

Finally, pH can be calculated by the expression pH = -log[H3O+], and we obtain the answer of pH=2.34.

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One of the postulates of Dalton's atomic theory is that "All matter is made of atoms, which are indivisible and indestructible."

Everything in the universe is made up of small, indivisible particles called atoms. These atoms cannot be broken down into smaller pieces and they cannot be destroyed. This postulate is important because it helps us understand the basic building blocks of matter and how they behave.

Atoms can be combined in simple integer ratios to form compounds, and during a chemical reaction, atoms are rearranged but not created or destroyed. This postulate is known as the law of conservation of mass. Without atoms, there would be no matter and therefore no universe as we know it.

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Answer: Adding or removing energy from matter

Explanation:

Answer:

A temperature inversion occurs when air near the ground is relatively cool, and there is a layer of warmer air above it. That upper layer of warm air keeps the cooler air from rising, and traps all of the pollution in the cooler, lower layer.

Explanation:

Hope this helps

Crown me as brainliest:)

The cultures of prehistoric humans are primarily known through the excavation of stone tools and other durable artifacts, such as the Oldowan and Acheulian tool traditions.

Stone tools and imperishable artifacts serve as key archaeological evidence for understanding prehistoric cultures. Through meticulous excavation and analysis, archaeologists have been able to piece together the lifestyles, technological advancements, and social behaviors of early human societies. The term "paleolithic" refers to the Old Stone Age, a time when humans relied on stone tools as their primary implements.

The Oldowan tool tradition is considered the earliest stone tool industry, dating back around 2.6 million years ago. It is characterized by simple tools, such as choppers and scrapers, which were crafted by flaking off pieces from larger stones. These tools were primarily used for basic activities like butchering and processing animal carcasses.

Later, the Acheulian tool tradition emerged around 1.76 million years ago, representing an advancement in stone tool technology. Acheulian tools, such as handaxes and cleavers, were more refined and standardized, showcasing an increased level of sophistication in tool-making techniques. These tools served a wide range of purposes, including hunting, woodworking, and shaping raw materials.

By studying the Oldowan and Acheulian tool traditions, researchers gain valuable insights into the cognitive abilities, cultural development, and technological progress of early humans. The examination of these artifacts provides evidence of their adaptability, problem-solving skills, and the gradual refinement of their tool-making techniques over time.

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The evaporation rate of liquids varies depending on the temperature, humidity, and the surface area exposed. To conduct a science experiment on the rate of evaporation of different liquids, you can take two or more liquid samples and expose them to identical environmental conditions.

The rate of evaporation varies depending on the type of liquid. As a result, different liquids evaporate at different rates. It is influenced by several factors such as temperature, humidity, surface area, and air pressure. Water, for example, evaporates at a slower pace than alcohol due to its higher boiling point.

Also, liquids evaporate more quickly when the temperature is high, air pressure is low, and humidity is low. This is because more energy is available to break the bonds between the molecules, which causes the liquid to evaporate more rapidly. On the other hand, if the temperature is low, the air pressure is high, or the humidity is high, then the liquid will evaporate at a slower rate.

To conclude, the rate of evaporation of liquids differs based on several factors, including the chemical makeup of the liquid, the surrounding temperature, humidity, surface area exposed, and air pressure.

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Answer:

The motion of the object is changing

Explanation:

Objects will only change their motion (direction, speed) if there is an unbalanced force of some kind acting on them. Balanced forces result in no change in the object's state of motion.

The motion of the object is changing.

Objects will only change their motion (direction, speed) if there is an unbalanced force of some kind acting on them. Balanced forces result in no change in the object's state of motion.

"Change with time of the position or orientation of a body. Motion along a line or a curve is called translation. Motion that changes the orientation of a body is called rotation."

"A force is a push or pull upon an object resulting from the object's interaction with another object."

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Answer:

= 3.456 × 1011

(scientific notation)

= 3.456e11

(scientific e notation)

= 345.6 × 109

(engineering notation)

(billion; prefix giga- (G))

= 345600000000

(real number)

Explanation:

i dont know if its math or something else so here are your answers:)

Answer:

0,002

Explanation:

Coinage metals, which typically include copper, silver, and gold, are chosen over more active metals for use in coins because they are less reactive and more resistant to corrosion.

This ensures durability and preserves the appearance of the coins. Some more active metals like zinc or nickel are sometimes used in coins due to their lower cost and availability, while still maintaining adequate resistance to corrosion and wear for everyday use.

The reason why the last 4 miles in the activity series of metals, which are gold, silver, platinum, and palladium, are commonly referred to as the "coinage medals" is because they are highly resistant to corrosion and have a low reactivity towards other chemicals, making them ideal for use in coins. These metals are also very rare and valuable, which adds to their appeal as a currency.

More active metals such as zinc or nickel are sometimes used in coins because they are more abundant and less expensive than the "coinage metals". However, these metals tend to be more reactive and therefore more prone to corrosion and other chemical reactions, which can affect the appearance and value of the coins over time. Additionally, the use of these metals in coins is often limited to lower denominations or commemorative coins, rather than as a standard currency.

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The "coinage metals" are typically gold, silver, copper, and platinum, which are the last 4 metals in the activity series. These metals are chosen over more active metals for use in coins because they are relatively unreactive and do not corrode easily, making them ideal for coins that need to be durable and long-lasting. Additionally, these metals have been historically valued and used as currency, making them culturally significant as well.

However, some more active metals such as zinc or nickel are sometimes used in coins because they are cheaper and more readily available than the coinage metals. These metals may be used as an alloy with the coinage metals to make coins more affordable, or they may be used as a substitute for the more expensive metals in lower denomination coins. However, these metals are not as durable as the coinage metals and may corrode more easily, leading to shorter lifespans for the coins.

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The reaction rate is compared to the concentration of the vinegar and baking soda solution, namely the faster the chemical reaction and the greater the concentration of particles, the faster the reaction rate.

The reaction rate is the change in the concentration of the reactants (reactants) or the concentration of the products of the reaction (products) per unit time.

If a solution of vinegar and baking soda is reacted it will produce bubbles which cause the formation of carbon dioxide gas. The concentration of the vinegar and baking soda solution undergoes a chemical reaction which results in the formation of a new type of substance by chemical change. The reaction rate is compared to the concentration of the vinegar and baking soda solution, namely the reaction rate can be faster when the chemical reaction is faster and the particle concentration is greater.

Comparison of hypotheses with experimental results also show, The concentration of the two substances will facilitate the occurrence of an effective collision. This effective collision will cause a chemical reaction that speeds up the reaction rate.

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Answer:

a

i just had this

Answer:

A. water entering the plant. thats the one

Explanation:

There are three main compartments for fluids: interstitial, intracellular, and intravascular In the capillaries, fluid moves from the intravascular to the interstitial and intracellular compartments.

The capillary intravascular space and the interstitial fluid compartment are separated by a "membrane" made up of the endothelial glycocalyx, endothelial cells, and subendothelial cell matrix. Water and small-molecular-weight particles, such as electrolytes, glucose, acetate, lactate, gluconate, and bicarbonate, are freely permeable to this capillary "membrane." In order to enter or exit the intravascular compartment, gases like oxygen and carbon dioxide freely diffuse through this membrane, following their concentration gradient.

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The complete question is

identify the three compartments in which fluids are found in the body (3 pts), identify relative volumes for each

10.3 g of  \(Ag_{2} CO_{3}\) will produce from 12.7 g \(AgNO_{3}\).

In simple terms, a limiting reagent is a reactant that is completely used up in the reaction. 

It is also referred to as a limiting reactant or limiting agent.

Now, according to the question,

Since it is a limiting reagent, it will react fully. 

The mass of \(AgCO_{3}\) that will be produced will be:-

Equivalent mole of \(AgNO_{3}\) = Equivalent weight of \(Ag_{2} CO_{3}\) = 12.7/169.97 = x*2/274x = 10.3 g. 

Hence, 10.3 g of \(Ag_{2} CO_{3}\) will be produced.

It is used to restrict the reaction.

It tells you the estimated amount of compound to be used.

It brings quantitative understanding to chemical reactions.

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The quantity in moles of RbF that are in 57.0 grams of RbF can be determined as follows: Step 1: Find the molar mass of RbF.The molar mass of RbF (rubidium fluoride) is the sum of the molar masses of the constituent atoms.

Rubidium has an atomic mass of 85.47 g/mol, and fluorine has an atomic mass of 18.9984 g/mol. Molar mass of RbF= (85.47 + 18.9984) g/mol= 104.4684 g/molStep 2: Calculate the number of moles.The number of moles of a substance is obtained by dividing the mass of the substance by its molar mass.

Using the given data: Mass of RbF= 57.0 gMolar mass of RbF= 104.4684 g/molNumber of moles of RbF= Mass/Molar mass= 57.0/104.4684= 0.5465 mol RbF (rounded off to four significant figures)Therefore, the quantity in moles of RbF in 57.0 grams of RbF is 0.5465 mol RbF.

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A sample of gas occupies a volume of 70.3 ml as it expands, it does 140.6 j of work on its surroundings at a constant pressure of 783 torr and the final volume of the gas is 11.12L

A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container and even in the presence of gravity and regardless of the amount of substance in the container

Here given data is 11.12L

V₁ = Initial volume = 70.3 ml = 0.0703ml =  (1L=1000ml)

w = 140.6 J = 1.387 J = (1Latm=101.3J)

Pressure =  783 torr = 1.03 atm  = (1atm=760 torr)

V₂ = final volume = ?

1.387Latm = 1.03 atm × (V₂ - 0.0703ml)

(V₂ - 0.0703ml) = 11.05

V₂ = 11.12L

The final volume of the gas is 11.12L

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Answer:

5N would be the net force if i'm correct 5N and 5N cancle each other out then all your left with would be 5N

Explanation:

BTW whats your

name-

age-

and fav color just tring to meet new people

Answer:

Explanation:

Pro – Low carbon. Unlike traditional fossil fuels like coal, nuclear power does not produce greenhouse gas emissions like methane and CO2. ...

Con – If it goes wrong… ...

Pro – Not intermittent. ...

Con – Nuclear waste. ...

Pro – Cheap to run. ...

Con – Expensive to build

Answer:

I think it's C. Grass. :)

Answer:

Conduction

Explanation:

Conduction is the transfer of energy from one molecule to another by direct contact.

The net heat transferred to the gas in this process is zero.

To construct the p-V diagram, we need to analyze the given processes and understand how the pressure and volume change.

Process 1: Expansion at constant temperature

The initial state is given as 3.50 moles of helium gas at a pressure of 2.80 atm and a temperature of 180.0 °C.

The gas expands at constant temperature until its volume has tripled. Since the temperature remains constant, the gas follows Boyle's Law, which states that the product of pressure and volume is constant: P₁V₁ = P₂V₂.

Since the volume triples, V₂ = 3V₁.

Therefore, the pressure decreases to one-third of the initial pressure, P₂ = P₁/3. We can plot this as a horizontal line at constant temperature.

Process 2: Constant-pressure compression

After expansion, the gas undergoes constant-pressure compression and returns to its initial volume. This means the volume decreases while the pressure remains constant at P₂. We can plot this as a vertical line.

Combining both processes, the p-V diagram will consist of a horizontal line followed by a vertical line, forming a rectangular shape.

To evaluate the net heat transferred to the gas, we need to consider that the process occurs at constant temperature.

In an ideal gas, at constant temperature, the net heat transferred is zero according to the first law of thermodynamics.

This is because any heat added to the gas during expansion is equal to the heat extracted during compression.

Therefore, the net heat transferred to the gas in this process is zero.

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Answer:

wdym

Explanation:

hmm

Answer:

All three populations would increase.

Explanation:

Answer:

Report of the climate change can help the people. As when people wants to go for  picnics or somewhere else. They did not have any idea that what will be the climate when they go. Report of climate change help him to choose the right time for going on picnics or  somewhere else.

Answer:

The report mentioned ways that people’s lives may change because of climate change, such as rising sea levels, reduced crop efficiency, and heat waves. This information may encourage the public to change the way they use energy, for example how they heat their homes or power their cars.

Explanation:

Pyruvate is not directly involved in the process of fixing atmospheric nitrogen (N2) into a biologically usable form. Therefore, it does not have a direct mole-to-mole relationship with the fixation of N2. The conversion of atmospheric nitrogen to a usable form, such as ammonia (NH3), typically involves nitrogen-fixing enzymes like nitrogenase, which are found in certain bacteria and plants.

During nitrogen fixation, nitrogenase enzymes catalyze the conversion of N2 to ammonia. This process requires the input of energy in the form of ATP and a source of electrons, often obtained from reduced ferredoxin or reduced flavodoxin. Pyruvate, a key metabolite in cellular respiration, can indirectly provide the energy and reducing power needed for nitrogen fixation by participating in the metabolic pathways that produce ATP and reducing equivalents.

Therefore, while pyruvate can contribute to the overall energy and reducing power requirements for nitrogen fixation, it cannot be directly linked to a specific mole-to-mole ratio with N2 fixation. The process of nitrogen fixation is a complex biochemical process involving multiple enzymatic reactions and electron transfer pathways, with pyruvate playing a supportive role in providing the necessary energy and reducing equivalents.

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The volume of 2.00 moles of a gas depends on its pressure, temperature, and identity.

The volume of 2.00 moles of a gas depends on the pressure and temperature conditions. The ideal gas law can be used to calculate the volume using the following formula:

V = nRT/P

where V is the volume in liters, n is the number of moles, R is the universal gas constant (0.0821 L⋅atm/(mol⋅K)), T is the temperature in Kelvin, and P is the pressure in atm.

Without knowing the pressure and temperature, it is not possible to determine the volume in liters of 2.00 moles of a gas.

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