the burning sparkler shown above the title on the cover page of your lab manual demonstrates the burning of magnesium metal. what is the balanced chemical equation for this reaction?

Answer:

Mass = 18.36 g

Explanation:

Given data:

Mass of nitrogen = 15 g

Mass of hydrogen = 4 g

Mass of ammonia produced = ?

Solution:

Chemical equation:

N₂ + 3H₂      →       2NH₃

Number of moles of nitrogen:

Number of moles = mass/molar mass

Number of moles = 15 g/ 28 g/mol

Number of moles  = 0.54 mol

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 4 g/ 2 g/mol

Number of moles  = 2 mol

now we will compare the moles of ammonia with nitrogen and hydrogen.

                    H₂            :            NH₃

                      3             :             2

                     2              :            2/3×2 = 1.3

                      N₂            :            NH₃

                      1               :             2

                  0.54             :            2/1×0.54 = 1.08

less number of moles of ammonia are produced by nitrogen thus it is limiting reactant.

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 1.08 mol × 17 g/mol

Mass = 18.36 g

Answer: Nuclear fusion

Explanation:

I think

In a 5-liter vessel containing .84 mol of methane, 0.2 mol of ethane, and 0.8 mol of neon at a total pressure of 1000 mmHg partial pressure of neon is 434.8 mmHg.

To calculate the partial pressure of neon in a 5-liter vessel, we will use Dalton's Law of Partial Pressures. First, find the total number of moles of all gases in the vessel:
Total moles = moles of methane + moles of ethane + moles of neon
Total moles = 0.84 mol + 0.2 mol + 0.8 mol = 1.84 mol
Next, find the mole fraction of neon:
Mole fraction of neon = moles of neon / total moles
Mole fraction of neon = 0.8 mol / 1.84 mol = 0.4348
Now, multiply the mole fraction of neon by the total pressure to find the partial pressure of neon:
Partial pressure of neon = mole fraction of neon × total pressure
Partial pressure of neon = 0.4348 × 1000 mmHg = 434.8 mmHg
Therefore, the partial pressure of neon in the 5-liter vessel is 434.8 mmHg.

Learn more about methane here:

https://brainly.com/question/30217912

#SPJ11

(a) The number of moles of oxygen gas (O₂) that reacted is 0.00325 mol.

(b) When the experiment is repeated without a lid on the crucible, the magnesium oxide produced will react with any oxygen present in the air.

(a) To calculate the number of moles of oxygen gas (O₂) that reacted, we need to first determine the number of moles of magnesium that reacted using its atomic mass:

Mass of magnesium (Mg) = 0.12 g

Atomic mass of Mg = 24.31 g/mol (from periodic table)

Number of moles of Mg = Mass of Mg / Atomic mass of Mg

= 0.12 g / 24.31 g/mol

= 0.00494 mol

The balanced chemical equation for the reaction between Mg and O₂ to produce MgO is:

2Mg + O₂ → 2MgO

From the equation, we can see that 2 moles of Mg react with 1 mole of O₂ to produce 2 moles of MgO.

Therefore, the number of moles of O₂ that reacted can be calculated as follows:

Number of moles of MgO produced = Mass of MgO / Molar mass of MgO

= 0.20 g / (24.31 g/mol + 16.00 g/mol)

= 0.00650 mol

Since 2 moles of MgO are produced from 1 mole of O₂, the number of moles of O₂ that reacted can be calculated as:

Number of moles of O₂ = Number of moles of MgO produced / 2

= 0.00650 mol / 2

= 0.00325 mol

(b) When the experiment is repeated without a lid on the crucible, the magnesium oxide produced will react with any oxygen present in the air. This will cause the mass of magnesium oxide produced to be greater than when the experiment was conducted with a lid on the crucible, as more oxygen will react with the magnesium.

Additionally, any water vapor or other gases present in the air may also react with the magnesium oxide, further affecting the mass of the final product. Therefore, the mass of magnesium oxide produced will be different without a lid on the crucible due to the presence of additional reactants in the air.

Learn more about number of moles here: https://brainly.com/question/13314627

#SPJ1

Answer:

Im pretty sure, its Kinetic Energy increases. So C. Have a nice day!

Explanation:

"When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases."

Answer:

Explanation:

You can do this by doing dimensional analysis.

The first step is to change grams to mg

1000 mg = 1 gram

So the fraction will look like this

1.03 g * 1000 mg/ 1 gram = 1030 mg (the grams cancel out)

Now move onto the volume. The volume is actually 1 cm^3. This becomes 1 cm^3 / 1000 mm^3

So the answer becomes

1030 mg / cm^3 * ( 1 cm^3/1000 mm^3) The cm^3 cancel out

1030 mg / 1000 mm^3

1.030 mg/ mm^3

You must remember that there will be a rearrangement. So, you should get is 1-chloro-2-methylcyclopentane.

What is organic product?

With very few exceptions, a chemical is regarded as organic if it contains at least one carbon atom, regardless of its source. Organic chemistry is sometimes referred to as "the chemistry of carbon" due to the fact that the carbon atom is normally bonded to at least one hydrogen atom.

What is reaction?

In a chemical reaction, one or more substances—also known as reactants—become one or more new substances, also known as products. Both chemical components and elements are substances.

Therefore,  You must remember that there will be a rearrangement. So, you should get is 1-chloro-2-methylcyclopentane.

Learn more about organic product from the given link.

https://brainly.com/question/1594044

#SPJ1

Answer:

True and false at the same time

Explanation:

It is true that Earth is heaven for life but It's also hell for life because people suffer a lot and so does the Earth. Earth is a hell for life because of all the bullying, criticism, racism, sexism, and homophobic people. Life is a great thing to enjoy but with all the negative things that happened and keep happening in the world, it's a living hell for a life. The only good things are that you can explore and do things you never thought of doing before and you are ale=ways surrounded by people who love you and appreciate you for who you are but it's a 5-50 chance of you getting an opportunity like that.

I'm not a negative person it's just the ways that things are. I hope this answers your question!

Have a nice day! UwU

if you binding energy for thr nuclide 199F in Mev per nucleu the result is 7.78MeV.

What is energy?

energy is ability to do the work . Sicientist define energy as the ability to do the work. mordencivilizwtion is possible because people to learn how to energy form one form to another and then do the work.

Mass defect

=[{9×1.0078)+(10×1.0087)}−18.9984]mu

=0.1588mu

Binding energy per nucleon

=(0.1588×931)Mev/19

7.78 MeV`

To know more about energy click -

https://brainly.com/question/13881533

#SPJ4

Answer:

Number of protons - number of electrons = charge on ion.

Explanation:

Answer:  When a liquid becomes a solid what happens to the atoms in the solid?

The particles (atoms or molecules) are attracted to each other. The particles (atoms or molecules) vibrate but do not move past one another. The solid retains its shape.

Explanation:

The atoms in a liquid have more energy than the atoms in a solid. There is a special temperature for every substance called the melting point. When a solid reaches the temperature of its melting point, it can become a liquid. Where the Atoms vibrate but still stick together, not moving past, behind, etc of where they are.

Through a solution of Fe(no3)2, 3.43 a current is flowing. For 8.80 g of iron to be plated out, this current must be applied in 2.456 hours (about).

A stream of charged particles—such as electrons or ions—moving through a conductor for electricity or into empty space is known as an electric current. The net rate of passage of electric charge through a surface or into a control volume is used to measure it. Charge carriers are the moving particles, which depending on the conductor could be any number of different types of particles. Often, electrons flowing over a wire serve as the charge carriers in electric circuits. They may be holes or electrons in semiconductors.

Magnetic fields are produced by electric currents and employed in transformers, inductors, motors, and generators. They induce Joule heating in common conductors, which illuminates incandescent light bulbs.

Learn more about Fe(no3)2 here

https://brainly.com/question/11614686

#SPJ4

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus

Separation of mixtures is the process of isolating and purifying individual components from a mixture. It has a wide range of applications in various fields, including chemistry, biology, and environmental science. Here are ten beneficial effects of separation of mixtures:

Helps to obtain pure substances: Separation of mixtures helps in obtaining pure substances, which are essential for research and industrial processes.

Enables identification of individual components: Separation of mixtures allows the identification and characterization of individual components in a mixture.

Allows the removal of impurities: Separation of mixtures can be used to remove impurities from a mixture, which can improve the quality of the final product.

Facilitates recycling: Separation of mixtures is crucial for recycling materials such as plastic, paper, and metals.

Enables selective extraction: Separation of mixtures can be used to selectively extract specific components from a mixture.

Helps in drug development: Separation of mixtures is important in drug development, where pure compounds are required for testing and clinical trials.

Helps in forensic analysis: Separation of mixtures is used in forensic analysis to identify and analyze evidence.

Facilitates food processing: Separation of mixtures is used in the food industry to extract and purify ingredients.

Enables the production of clean energy: Separation of mixtures is used in the production of clean energy, such as separating hydrogen from other gases.

Helps in environmental remediation: Separation of mixtures is used in environmental remediation to separate and remove pollutants from soil, water, and air.

To learn more about mixture refer to:

brainly.com/question/2800536

#SPJ4

Approximately 5272.2 grams of PbCl4 were added to 2700 grams of ethanol to increase the boiling point by 6.8 degrees.

To determine the grams of PbCl4 added to 2700 grams of ethanol, causing the boiling point to increase by 6.8 degrees, we will use the molality-based boiling point elevation formula, which is:

ΔTb = Kb * m

Here, ΔTb is the change in boiling point (6.8 degrees), Kb is the molal boiling point elevation constant of ethanol (1.22 °C kg/mol), and m is the molality (moles of solute per kg of solvent).

First, we need to find the molality (m) of the solution:

6.8 = 1.22 * m
m = 6.8 / 1.22 ≈ 5.57 mol/kg

Now, we can calculate the moles of PbCl4 added to the ethanol:

5.57 mol/kg * (2700 g / 1000 g/kg) ≈ 15.03 mol of PbCl4

Next, we need to find the molar mass of PbCl4:

Pb: 207.2 g/mol
Cl: 35.45 g/mol

Molar mass of PbCl4 = 207.2 + (4 * 35.45) ≈ 350.6 g/mol

Finally, we can calculate the grams of PbCl4 added to the ethanol:

15.03 mol * 350.6 g/mol ≈ 5272.2 g

Therefore, approximately 5272.2 grams of PbCl4 were added to 2700 grams of ethanol to increase the boiling point by 6.8 degrees.

To know more about ethanol, visit:

https://brainly.com/question/25002448#

#SPJ11

Answer:

d = 3.29 g/cm³

Explanation:

Given data:

Density of material = ?

Mass of material = 56.6 g

Volume of material = 17.2 cm³

Solution:

Formula;

d = m/v

d = density

m = mass

v = volume

by putting values,

d = 56.6 g/ 17.2 cm³

d = 3.29 g/cm³

Answer: The partial pressure of Ne is 9.02 atm.

Explanation:

Given: Total pressure = 14.9 atm

Partial pressure of He = 1.43 atm

Partial pressure of Ar = 4.45 atm

Partial pressure of Ne = ?

According to the Dalton's law of partial pressures the total pressure exerted by the a number of gases in a mixture is equal to the sum of partial pressures of each gas present in the mixture.

Now, for the given mixture the partial pressure of Ne is as follows.

Total pressure = Partial pressure of He + Partial pressure of Ar + Partial pressure of Ne

Substitute the values into above formula as follows.

Total pressure = Partial pressure of He + Partial pressure of Ar + Partial pressure of Ne

14.9 atm = 1.43 atm + 4.45 atm + Partial pressure of Ne

Partial pressure of Ne = 14.9 atm - 5.88 atm

= 9.02 atm

Thus, we can conclude that the partial pressure of Ne is 9.02 atm.

Answer:

The mass of solid object is 20.52 g.

Explanation:

Given data:

Volume of water = 36.1mL

Volume of water with metal cylinder = 43.7 mL

density of metal cylinder = 2.70 g/mL

Mass of solid object  = ?

Solution:

First of all we will calculate the volume of solid object.

Volume of solid object = Volume of water with metal cylinder  - Volume of water

Volume of solid object =  43.7 mL - 36.1mL

Volume of solid object =7.6 mL

Density:

density = mass/ volume

2.70 g/mL = mass / 7.6 mL

mass =  2.70 g/mL × 7.6 mL

mass = 20.52 g

The mass of solid object is 20.52 g.

The ignition occurs when a mixture of fuel & oxygen encounter an external heat source with sufficient heat Piloted ignition.

When a volatile fuel is close to a nearby local energy source (pilot) and reaches its lower limit of flammability in air, piloted ignition may be possible. The flame that originates in the premixed system spreads outward from the pilot. The first law of thermodynamics for systems with fixed mass only describes the energetics of this process.

The science of thermodynamics examines how heat, work, temperature, and energy are related. The general topic of thermodynamics is the transfer of energy from one location or form to another. The fundamental idea is that heat is a type of energy that is equivalent to a specific quantity of mechanical labor.

To learn more about ignition

brainly.com/question/6481027

#SPJ4

We need 65mL of the 11.6M stock hydrochloric acid to prepare 250mL of 3.0M HCl solution.

To calculate the volume of 11.6M stock hydrochloric acid needed to prepare 250mL of 3.0M HCl solution, we need to use the formula:
M1V1 = M2V2
where M1 is the concentration of the stock solution, V1 is the volume of the stock solution needed, M2 is the desired concentration of the diluted solution, and V2 is the final volume of the diluted solution.
In this case, we know:
M1 = 11.6M
V1 = unknown (what we need to find)
M2 = 3.0M
V2 = 250mL
Plugging these values into the formula, we get:
11.6M x V1 = 3.0M x 250mL
To solve for V1, we can rearrange the formula:
V1 = (3.0M x 250mL) / 11.6M
V1 = 65mL (rounded to the nearest mL)

To know more about hydrochloric acid visit :-

https://brainly.com/question/15231576

#SPJ11

Answer:

Barium

Explanation:

I think that's the answer

The element in period 6 with 2 valence electrons is Barium.

Learn more at: https://brainly.com/question/24089206?referrer=searchResults

Answer:

I think this would be iron

Explanation:

Explanation:

Family is usually considered to be the most important agent of socialization. They not only teach us how to care for ourselves, but also give us our first system of values, norms, and beliefs. ... Another agent of socialization that relates to school is our peer group.

Answer:

174 kPa

Explanation:

Given that,

Initial temperature, T₁ = 25° C = 25+273 = 298 K

Final temperature, T₂ = 225°C = 225 + 273 = 498 K

Initial pressure, P₁ = 104 kPa

We need to find the new pressure. The relation between the temperature and pressure is given by :

\(\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\)

So,

\(P_2=\dfrac{P_1T_2}{T_1}\\\\P_2=\dfrac{104\times 498}{298}\\\\P_2=173.79\ kPa\)

or

P₂ = 174 kPa

So, the new pressure is 174 kPa.

Answer:

3) 2-8-7

Explanation:

An atom is in an excited state when it is very close to having a full octet (either it gains or loeses electrons to get a full octet). The first shell should have two electrons and the next one and the one after that should be eight. Since the third shell has 7 electrons it needs to gain one more electron to get a full octet. Therefore the answer is 3

Magnesium has a higher melting point than sodium. Calcium is used for the crucible because it has a higher melting point than sodium.

The melting and boiling points of metals increase across the period. Magnesium has a higher melting point because it contributes one additional electron per atom than sodium in the electron sea.

The crucible that will be used for melting sodium must have a higher melting point than sodium. Therefore, a calcium crucible should be used.

The metal that has the lowest melting point must be the metal that has the lowest density and therefor is easiest to bend. That is metal B.

A very important property of metals is ductility. It allows a metal to be drawn into sheets without breaking. Hence, the property of metals that explains the fact that the towers of the bridge does not break into pieces like glass but rather bends is called ductility.

Examining the graph that shows the test the elongation of three different metals against the force, is the correct order of the metals according to their suitability to be used for suspenders is A, B, C.

Learn more: https://brainly.com/question/5147266

It would take 8.26 g of the reactant in grams.

NI3 breaks down into 2 NI3 (s) ——————————> N2 (g) (g) It is evident from the chemical equation that 761.4 g of iodine is obtained from = 789.4 g of NI3 when the following conditions are met:.......... +..................... 3 I2 (g) 2 mol..................................1 mol.........................................3 mol 2 x 394.7 g/mol..............28 g/mol....................................3 x 253.8 g/mol

As a result, the formula yields 7.97 g of iodine: = 789.4 g x 7.97 g / 761.4 of NI3 = 6291.518 / 761.4 of NI3 = 8.26 g of NI3; therefore, 8.26 g of the reactant would be needed.

To know more about NI3 visit:-

https://brainly.com/question/13266018

#SPJ4

It woukd decrease.

I am sure its correct you can trust me becuase I took the test.

Answer:

The speed of the wave decreases.

Explanation:

When light waves do pass through a medium, any solid, liquid, or gas, the speed of the waves actually decreases. Solids are more dense than liquids, so they decrease the speed of light even more.


(I did the quiz btw!!)