if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, how many moles of ammonia gas would be produced?

The balanced chemical reaction is :

\(O_2 + 4Na \ -> \ 2Na_2O\)

Number of moles of Na, \(n = \dfrac{14.6}{23} = 0.635 \ mol\) .

Now, from balance chemical reaction we can see that 1 mole of oxygen reacts with 4 moles of sodium.

So, number of moles of oxygen are :

\(n = \dfrac{0.635}{4}\ mole\)

So, amount of oxygen required is :

\(m = \dfrac{0.635 \times 32}{4}\ gm\\\\m = 5.08 \ gm\)

Therefore, 5.08 gram of oxygen will react with 14.6 gram of sodium.

Answer:

Anything that has less density than water will float on water.

Explanation:

Come on! It's basic knowledge!

A bowling ball has both kinetic energy (KE) and gravitational potential energy (GPE).  KE is 75J, GPE is 2,310J.

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Answer:

When an atom loses an electron it becomes ionized

In a 60g sample of tetraethyl-lead, a gasoline is addictive, is found to contain 38.43g lead, 17.83g carbon and 3.74g hydrogen, its empirical formula is PbC₆H₂₀.

The term Empirical formula is defined as the chemical formula of a compound that gives the ratios of the elements present in the compound but not the actual numbers or arrangement of atoms.

The percentage mass of Pb = 38.43/60 × 100

= 64.05 %

The percentage mass of C = 17.83/60 × 100

= 29.71%

The percentage mass of H = 3.74/60 × 100

= 6.23%

Now,

Pb → 64.05/207

= 0.3094

C ⇾ 29.71/12

= 2.475

H ⇾ 6.23/1

= 6.23

Therefore, the ratio is as follows:

Pb : C : H = 1 : 8 : 20

Thus, empirical formula is PbC₆H₂₀.

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BaCl2·2H2O(s) is Barium chloride dihydrate

Define hydrate.

A substance that comprises water or its component parts is referred to as a hydrate. Different types of hydrates, some of which were so named before their chemical structure was discovered, varied greatly in the chemical state of the water.

The molecule is a monohydrate if only one water molecule is present. A dihydrate is made up of two molecules of water, etc.

The hydrate form of barium chloride is called barium chloride dihydrate. It performs the function of a potassium channel blocker. It is an inorganic chloride, a barium salt, and a hydrate. It has barium chloride in it.

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The theoretical yield is obtained from the limiting reactant in the reaction.

The question is incomplete but I will do my best to help. In a reaction, the theoretical yield is calculated from the limiting reactant in the reaction. Therefore, in order to obtain the limiting reactant, we must first obtain which of the reactants is the limiting reactant.

When that is done, the stoichiometry of the reaction can now be used to calculate the value of the theoretical yield from the number of moles of the limiting reactant.

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Answer:

360

Explanation:

Answer:

When two distinct elements are chemically combined.

Explanation:

Chemical bonds form between their atoms the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl)

Answer:

In the elemental form, non-metals can be gas, liquid or solid. They aren't shiny (lustrous) and they don't conduct heat or electricity well. Usually their melting points are lower than for metals, although there are exceptions. The solids usually break easily, and can't bend like metals

Explanation:

The given reaction Mg + O₂ → MgO is a type of Synthesis reaction. Hence option (1) is correct.

Synthesis reactions are reactions that occur when two different atoms or molecules interact to form one molecule or compound.

It is also known as combination reaction

In the given reaction Mg and O combines with each other to form one product i.e, MgO. Hence, The given reaction Mg + O₂ → MgO is a type of Synthesis reaction. Thus, option (1) is correct.

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Answer:

N2O

Explanation:

hope am right.....

To determine the molar mass of the element, we will use the formula:$$\mathrm{Molar\ mass}=\frac{\mathrm{Density}}{\mathrm{Moles}/\mathrm{Volume}}$$Given:$$\mathrm{Density}=13.55\:\mathrm{g/cm^3}$$$$\mathrm{Moles}=1.16\:\mathrm{mol}$$$$\mathrm{Volume}=17.17\:\mathrm{cm^3}$$.

Given that, density = 13.55 g/cm3molar mass = ?mass of sample = density x volume$$\therefore \ \text{mass of sample} = \mathrm{density} \times \mathrm{volume}$$$$\Rightarrow\mathrm{mass} =13.55 \:\mathrm{g/cm^3} \times 17.17 \:\mathrm{cm^3}=232.7315\:\mathrm{g}$$Now, Molar mass is given by,$$\mathrm{Molar\ mass}=\frac{\mathrm{Density}}{\mathrm{Moles}/\mathrm{Volume}}$$$$\Rightarrow\mathrm{Molar\ mass}=\frac{13.55\:\mathrm{g/cm^3}}{1.16\:\mathrm{mol}/17.17\:\mathrm{cm^3}}=103.1\:\mathrm{g/mol}$$Therefore, the molar mass of the element is 103.1 g/mol.

The given information is about the element's sample. The formula for molar mass is used to find out the unknown molar mass of the given element.

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0.0013% = 0.0013 g/100 ml water, or 1.3 mg/100 ml water

so for 145 mg, you need 145×100/1.3 = 11154 ml water or 11.154 L of water. Lead is a toxic metal that affects the central nervous system.

Extensively talking, the frightened gadget is organized into  essential parts, the central nervous system(CNS) and the peripheral nervous system (PNS). The CNS is the processing center of the frame and includes the mind and the spinal cord. Both of these are protected through 3 layers of membranes referred to as meninges.

The principal anxious gadget is the frame's processing center. The brain controls most of the capabilities of the frame, inclusive of cognizance, movement, thinking, speech, and the five senses of seeing, listening to, feeling, tasting and smelling. The spinal twine is an extension of the mind.

The brain is what controls all the frame's features. The spinal twine runs from the brain down via the again. It carries threadlike nerves that department out to each organ and frame part. This network of nerves relays messages from side to side from the mind to distinctive parts of the body.

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Answer: Explanation:

You need 163.8 mL of concentrated sulfuric acid (18M) to prepare 9.0 L of a 1.00M solution.

The given problem can be solved using the molarity equation which is:
Molarity (M) = moles of solute (n) / liters of solution (L)
The balanced chemical equation for sulfuric acid (H2SO4) is:H2SO4 → 2H+ + SO42
The molecular weight of H2SO4 is 98g/mol.
Hence, 18M H2SO4 solution contains 98g/Liter.98g / 18M = 5.44 g/mL5.44 g/mL x 1000 mL/L = 5440 g/L5440 g / 98 g/mol = 55.102M
Concentrated sulfuric acid is 18M.

So, the volume of concentrated sulfuric acid (18M H2SO4) that is needed to prepare 9.0 L of 1.00M solution can be determined as follows:
Number of moles of H2SO4 in 9.0 L of 1.00M H2SO4 solution = 1.0 mol/L × 9.0 L = 9.0 mol
Total number of moles of H2SO4 in the final solution (1.00M) can be calculated as:9.0 mol / 55.102 mol/L = 0.1638 L = 163.8 mL (rounded to 2 decimal places)Therefore,

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Answer: the answer is B estimation

Explanation:

i just took a test

The one that is represented by the number of significant figures in a quantity is scientific notation. The correct option is D.

Scientific notation is a method of expressing numbers that are either too large or too small to be written in decimal form.

In the United Kingdom, it is known as scientific form, standard index form, or standard form.

The proper scientific notation format is an x 10b, where an is a number or decimal number with an absolute value greater than or equal to one and less than ten, or 1 |a| 10. b is the power of ten required for scientific notation to be mathematically equivalent to the original number.

Scientific notation is represented by the number of significant figures in a number.

Thus, the correct option is D.

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Answer:

190

Explanation:

Gold has atomic number of 79, which is the number of protons.

Mass number = #protons + #neutrons = 79 + 111 = 190

Answer:

Zero-Nine

Explanation:

this is becasue these numbers are rather small and if you plug these numbers into an equation you will most likely get 0.

Answer:

The earth is split into four major layers: the crust, the mantle, the outer core and the inner core

Explanation:

The number of gas particles in a container will have the greatest impact on pressure.

The number of gas particles in a container has the greatest impact on pressure because pressure is directly related to the frequency and magnitude of molecular collisions with the container walls.

When gas particles are in motion, they collide with each other and with the walls of the container. These collisions exert a force on the walls, which we perceive as pressure. The more gas particles there are in the container, the greater the number of collisions with the walls per unit of time.

According to the kinetic theory of gases, the pressure of a gas is proportional to the average kinetic energy and the frequency of collisions of the gas particles. Increasing the number of gas particles increases the frequency of collisions, resulting in more forceful and frequent impacts on the container walls. This leads to a higher pressure.

Conversely, if the number of gas particles decreases, there are fewer collisions occurring per unit of time, resulting in a lower pressure. Therefore, the number of gas particles in a container has the greatest influence on the pressure exerted by the gas inside.

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Answer:

D. +3

Explanation:

have a wonderful day!!

The ability to speak with confidence shows the characteristic of an epic hero does this passage show. Option C is correct.

The  feeling  or emotion or belief that one or a person  can have faith in or trust on someone or for something that he or she is doing or about to do and the hero are the inspiration for the society.

In other words a feeling or emotion  of self-assurance or self believe  arising or rises  from an appreciation or motivation of one's own abilities or qualities or performance.

Therefore, ability to speak with confidence shows the characteristic of an epic hero does this passage show. Option C is correct.

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Answer:

B

Explanation:

Cuz

Explanation:

there was any anything to help with

did you attach the picture

In bucket the thermal energy is more than the glass

Thermal energy is the energy contained within a system that is responsible for its temperature

The water in the bucket is more than the glass so thermal energy of the bucket is higher than the glass water and the thermal energy is the total amount of kinetic energy of the molecules in the system means in bucket the molecules are more and water are also more so the thermal energy is greater than the glass

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Answer:

\(1.167\times 10^{-3}\ \text{mol/h}\)

Explanation:

\(R_1\) = Rate of diffusion of \(CO_2\) = \(9.31\times 10^{-4}\ \text{mol/h}\)

\(R_2\) = Rate of diffusion of \(N_2\)

\(M_1\) = Molar mass of \(CO_2\) = 44.01 g/mol

\(M_2\) = Molar mass of \(N_2\) = 28.0134 g/mol

From Graham's law we have the relation

\(\dfrac{R_1}{R_2}=\sqrt{\dfrac{M_2}{M_1}}\\\Rightarrow R_2=\dfrac{R_1}{\sqrt{\dfrac{M_2}{M_1}}}\\\Rightarrow R_2=\dfrac{9.31\times 10^{-4}}{\sqrt{\dfrac{28.0134}{44.01}}}\\\Rightarrow R_2=1.167\times 10^{-3}\ \text{mol/h}\)

The rate of effusion of the \(N_2\) gas would be \(1.167\times 10^{-3}\ \text{mol/h}\).

Homogeneous and heterogeneous mixture in colloid, suspension and solution

A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension and within the categories of homogeneous and heterogeneous mixtures there are more specific types of mixtures including solutions is alloys, suspensions, and colloids and a solution is a mixture where one of the substances dissolves in the other and the substance that dissolves is called the solute

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If the decomposition of hydrogen peroxide into water and oxygen gas is an exothermic reaction, we would expect the final temperature to be lower than the initial temperature of 28˚C.

This is due to the fact that energy is released from the system during an exothermic reaction in the form of heat into the surroundings. In other words, the energy of the reactants is more than that of the products, and the excess energy is released into the environment.

As a result, the environment's temperature will rise, while the system's temperature will fall. This indicates that the reaction's final temperature will be lower than its 28° C starting point.

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Answer:

The electron cloud model describes electrons as the most likely found around the nucleus of an atom. It is also found that electrons could seemingly be everywhere at one time.

Explanation:

Hope this helped