Solve the simultaneous equation
-4x+3y=1
6x-y=2

Answer:

0.116 moles of ammonia can be produced from the reaction of 4.0 liters of hydrogen at 50.0°C and 1.2atm of pressure with excess nitrogen.

Explanation:

The balanced chemical equation for the reaction of hydrogen and nitrogen to form ammonia is:

N2(g) + 3H2(g) → 2NH3(g)

To determine how many moles of ammonia can be produced from the reaction of 4.0 liters of hydrogen at 50.0°C and 1.2atm of pressure with excess nitrogen, we need to use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, we need to convert the volume of hydrogen gas to moles using the ideal gas law equation:

n = PV/RT

where P is the pressure in atm, V is the volume in liters, R is the gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.

n = (1.2 atm)(4.0 L)/(0.0821 L·atm/mol·K)(50.0°C + 273) = 0.174 mol H2

Since there is excess nitrogen, all of the hydrogen will react to form ammonia. Using the mole ratio between NH3 and H2 from the balanced chemical equation:

2 mol NH3 / 3 mol H2

we can calculate how many moles of NH3 will be produced:

n(NH3) = (0.174 mol H2) × (2 mol NH3 / 3 mol H2) = 0.116 mol NH3

Therefore, 0.116 moles of ammonia can be produced from the reaction of 4.0 liters of hydrogen at 50.0°C and 1.2atm of pressure with excess nitrogen.

Answer:

1) KI

2) Mg3P2

3) Ag2S

4) FeBr3

5) Mg(OH)2

6) Na2SO4

7) Pb(NO3)4

8) (NH4)2CO3

Answer:

question 6: winter solstice

question 7: rotation is when an object spins around its axis, revolution is when an object travels in a path around another

question 8: the rotational period is equal to the period of revolution for the moon

question 10: true

Answer:

Question 6:  winter solstice

Question 7: rotation is when an object spins around its axis,

revolution is when an object travels in a path around another

Question 8: the rotational period is equal to the period of revolution for the moon

Question 10: true

Explanation:

I took the test its right

The net force on particle 3 due to the presence of particle 1 and particle 2 on the same straight line is 50.5 N to the right.

The force between the two particles is determined from Coulomb's law as shown below;

F = kq₁q₂/r²

F(1,2) = -(9 x 10⁹ x 28.1 x 10⁻⁶ x 25.5 x 10⁻⁶) / (0.3)²

F(1,2) = - 71.66 N

F(2,3) = + (9 x 10⁹ x 25.5 x 10⁻⁶ x 47.9 x 10⁻⁶) / (0.3)²

F(2,3) = + 122.15 N

The net force on particle 3 is determined as follows;

F(net) = 122.15 N - 71.66 N

F(net) = + 50.5 N

Thus, the net force on particle 3 due to the presence of particle 1 and particle 2 on the same straight line is 50.5 N to the right.

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When 2.00 moles of N2 react with sufficient H2, the balanced chemical equation for the synthesis of ammonia (NH3) is N2(g) + 3H2(g) → 2NH3(g).

According to the stoichiometry of the reaction, 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3. Since you have 2.00 moles of N2 reacting, you can use the mole ratio to determine the moles of NH3 produced:
(2 moles NH3 / 1 mole N2) × 2.00 moles N2 = 4.00 moles NH3,

So, when 2.00 moles of N2 react with sufficient H2, 4.00 moles of NH3 will be produced.

38.5 g is the mass of nitrogen.

generated moles of ammonia Chemical formula

N₂ + 3H₂ → 2NH₃

Number of nitrogen moles: Mass x molar mass equals number of moles 38.5 g/28 g/mol is the weight in moles.

1.375 mol is the number of moles.

The moles of ammonia and nitrogen from the balance chemical equation will now be compared.

 N₂ : NH₃ 1 : 2

1.375 : 2×1.375 = 2.75 mole..Thus, from 38.5 g of nitrogen, 2.75 moles of ammonia are created.

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Answer:

A

Explanation:

Got it right on edge 2021

The label that belongs in the region marked X is less competition for resources. Thus, the correct option for this question is A.

The advantages of sexual reproduction may be determined by the fact that it produces genetic variation in the offspring, the species can adapt to new environments due to variation, which gives them a survival advantage, and a disease is less likely to affect all the individuals in a population.

While the advantages of asexual reproduction are characterized as through the fact that the population can increase rapidly when the conditions are favorable. only one parent is needed. It is more time and energy efficient as you don't need a mate.

But label X discriminates the advantages of both forms of reproduction in a very efficient manner which definitely reduces the level of competition for resources among the population.

Therefore, the label that belongs in the region marked X is less competition for resources. Thus, the correct option for this question is A.

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The term "uncertainty variable" is not a standard term in physics or mathematics.

a) The uncertainty in w is ±10.

b) The uncertainty variable in w is ±0.

c) The uncertainty in w is ±17.

To find the uncertainty (Δw) in each scenario, we need to consider the uncertainties associated with each variable involved in the equation.
a) In the equation w = x + y, we are given that x has an uncertainty of ±4 and y has an uncertainty of ±6. To find the uncertainty in w, we simply add the uncertainties of x and y together:
Δw = ±4 + ±6 = ±10
Therefore, the uncertainty in w is ±10.
b) In the equation w = x - y, we are given that x has an uncertainty of ±8 and y has an uncertainty of ±8. To find the uncertainty in w, we subtract the uncertainty of y from the uncertainty of x:
Δw = ±8 - ±8 = ±0
Therefore, the uncertainty in w is ±0.
c) In the equation w = x + 2y - 3z, we are given that x has an uncertainty of ±2, y has an uncertainty of ±3, and z has an uncertainty of ±3. To find the uncertainty in w, we combine the uncertainties of x, y, and z:
Δw = ±2 + 2(±3) + 3(±3) = ±2 + ±6 + ±9 = ±17
Therefore, the uncertainty in w is ±17.
In summary:
a) Δw = ±10
b) Δw = ±0
c) Δw = ±17
Remember to calculate the answer to 2 decimal places.

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Answer:

Al2O3 ⇒ Aluminum Oxide

Explanation:

Balanced equation ⇒ 4Al + 3O2 --> 2Al2O3

If the typed stuff are confusing, see the attached pics.

\(NO_{2} (OH)\) is a base and \(Ni(OH)_{2}\) is a basic oxide that dissolves only in an acidic solution. Option D is correct.

In light of the given data, we can presume that \(NO_{2} (OH)\) is a base and \(Ni(OH)_{2}\) is an essential oxide.\(NO_{2} (OH)\) is probably going to be a feeble base that goes through halfway ionization in water, prompting the development of hydronium particles \((H_{3} O^{+} )\) and nitrite particles (\(NO_{2}^{-}\)).

Since the arrangement is acidic, this proposes that the centralization of \(H_{3} O^{+\)particles is more prominent than that of the \(OH^-\) particles.Then again, \(Ni(OH)_{2}\) is an essential oxide that responds with an acidic answer for structure nickel particles \((Ni_{2} ^{+} )\) and water (\(H_{2} O\)). This response demonstrates that \(Ni(OH)_{2}\) is a base that can kill a corrosive.

In this manner, we can presume that \(NO_{2} (OH)\) is a base and \(Ni(OH)_{2}\) is an essential oxide, which is a sort of base that responds with a corrosive to frame water and a salt. In light of this, choice D is the right response.

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12 moles of CO2 would be made up of 12 moles × Avogadro's number of CO2 molecules.

Avogadro's number is the number of atoms, ions, or molecules in one mole of a substance. It is defined as 6.022 x 10²³ particles per mole. It is named after Amedeo Avogadro, an Italian scientist who proposed the concept of the Avogadro's number in 1811. Avogadro's number is used in chemistry and physics to convert between moles, mass, and number of atoms, ions or molecules. It is a fundamental constant of nature, used in various calculations such as molar mass, chemical stoichiometry, and ideal gas law calculations.

The student wants to determine the number of particles in 12 moles of Carbon dioxide, the formula for carbon dioxide is CO2, which means that each molecule of CO2 having been made with one atom of carbon and two atoms of oxygen. Therefore, 12 moles of CO2 would be made up of 12 moles × Avogadro's number of CO2 molecules.

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(1) From the balanced equation, 2 moles of \(NH_3\) require 3 moles of \(H_2\). Following this ratio, 4 moles of  \(NH_3\) will require 6 moles of \(H_2\).

(2) The mole ratio of \(CH_4\) and water is 1:2. Thus, 0.26 moles of \(CH_4\) will produce:

0.26 x 2 = 0.52 moles of \(H_2O\)

Mass of 0.52 moles \(H_2O\) = 18.02 x 0.52

                                         = 9.37 grams

(3) The mole ratio of \(H_2O\) and \(O_2\) is 2:1.

9.6 grams of \(H_2O\) = 9.6/18.02 = 0.53 moles

Equivalent mole of \(O_2\) = 0.53/2 = 0.27 moles

Mass of 0.27 moles \(O_2\) = 0.27 x 32 = 8.64 grams.

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Answer:

28.69 grams

Explanation:

To find the mass, we first need to find the moles. Once we have the moles, it is easy to use the molar mass of H2SO4 to find its mass.

To find the moles, remember that molarity (M) is equal to the moles divided by the volume (L). The volume HAS TO be converted to liters!

M = moles / V

5.85 M = moles / 0.05 L

moles = 0.2925

Now we know that we have 0.2925 moles of sulfuric acid. The molar mass of sulfuric acid is 98.08 g/mol.

0.2925 moles * (98.08 g / mol) = 28.69 grams

Make sense? If you have any questions, don't hesitate to ask!

The three different layers of the skin are the epidermis, the dermis, and the subcutaneous tissue.

Melanocytes are cells in the epidermis that produce and distribute the pigment melanin, which gives color to the skin and helps protect it from the harmful effects of UV radiation.

Dendritic cells are immune cells that reside in the epidermis and function in identifying and presenting foreign antigens to other immune cells.

Merkel cells are specialized cells in the epidermis that combine with nerve endings to form Merkel cell-neurite complexes, which are involved in the sense of touch.

The thicker and more durable skin on the palms of the hands and soles of the feet is called the "stratum lucidum," while the rest of the skin is called the "stratum corneum."

The five layers of the epidermis from deepest to most superficial are:

A helpful mnemonic for remembering the layers of the epidermis is "Come, Let's Get Sun Burned," which stands for:

The three layers of the dermis are the papillary dermis, the reticular dermis, and the subcutaneous layer.

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Answer:

Na

Explanation:

Answer:

It is Rb!!

for plato users

Answer:       freezing

Explanation:

when the atoms or molecules in a solid or liquid are moving slower and closer together, it is called brrrrrrrrr freezinf

A certain elemental ion that is isoelectronic with Ar has valence electrons that feel Zeff = +6. The right option is e. More than one of the above.

What is isoelectronic?

Isoelectronic refers to having the same number of electrons or electronic configuration. When an ion has the same number of electrons as another atom or ion, it is called isoelectronic. Isoelectronic ions have identical electron configurations but differ in the number of protons present in their nuclei.

Zeff: Zeff refers to the effective nuclear charge experienced by valence electrons, or the force of attraction between the valence electrons and the nucleus of an atom. The charge felt by valence electrons varies depending on the number of protons and the number of electrons in an atom.

To find out the elemental ion which is isoelectronic with Ar and has valence electrons that fell Zeff=+6, we need to follow these steps:

Step 1: Determine the number of electrons in Ar. Ar (argon) has 18 electrons.

Step 2: Calculate the atomic number of the elemental ion. An isoelectronic ion with Ar will also have 18 electrons. Since the ion has a Zeff of +6, its atomic number will be 18 + 6 = 24.

Step 3: Identify the element with atomic number 24. The element with atomic number 24 is Cr (chromium).

Step 4: Check the answer choices. Cr is not listed among the answer choices. However, we can analyze each choice to see if they could form an ion that is isoelectronic with Ar:

a. P (phosphorus) - Atomic number 15; if it gains 3 electrons (P3-), it will have 18 electrons (isoelectronic with Ar).

b. S (sulfur) - Atomic number 16; if it gains 2 electrons (S2-), it will have 18 electrons (isoelectronic with Ar).

c. Ca (calcium) - Atomic number 20; if it loses 2 electrons (Ca2+), it will have 18 electrons (isoelectronic with Ar).

d. K (potassium) - Atomic number 19; if it loses 1 electron (K+), it will have 18 electrons (isoelectronic with Ar).

Your answer will be: e. more than one of the above.

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Answer:

Ozone or, also known as O^3 is commonly formed by oxygen's interaction with lightning, and is what make the air smell so fresh after it rains. Hope this helps on your gradpoint Earth Atmosphere Posttest!

Explanation:

Answer:

Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered: the sand stays behind in the filter paper (it becomes the residue ) the water passes through the filter paper (it becomes the filtrate )

Explanation:

Answer:

Describe the best method for separating a mixture of sand, salt, and steel shavings by placing the steps below in the correct order.

⇒ 4 Heat the mixture to evaporate the water.

⇒ 3 Pour the mixture through a filter to separate the sand.

⇒ 1 Pass a magnet over the mixture to remove the steel.

⇒ 2 Add water to the sand/salt mixture and stir to dissolve the salt.

Answer:

"The effect of increasing proton number is greater than that of the increasing electron number therefore, there is a greater nuclear attraction."

Explanation:

I got this off of Gogle, I would suggest using it for questions like this. I hope you have good luck on other questions! :)

Answer:two

Explanation:one plus one is two

Explanation:

he has no controlled variables

Answer:

The 5R's are Reuse, Reduce, Recycle, Repair and Recover.

Group 1: 1+

Group 2: 2+

Group 13: 3+

The charges of the ions are dependent on the number of valence electrons.

Valence Electrons

Group 1 has 1 valence electron, group 2 has 2, and group 13 has 3. It is important to remember that elements will attempt to have a full valence shell. They may either attempt to lose all of their valence electrons or fill the energy level with 8 electrons.

Since all of these groups have less than 4 valence electrons, they will attempt to lose their valence electrons.

Determining Charges

When atoms lose electrons, they gain a positive charge. Since all of these elements will lose electrons, all of the ions will be positive, also known as a cation.

The positive charge of an element is equal to the number of electrons the atom loses. This means that group 1 will have a 1+ charge because it loses 1 electron. Continue this pattern to determine that group 2 will have a 2+ charge and group 13 will have a 3+ charge.

The number of boxes to be able to get to 13 g of protein would be found to be 96, 154 boxes .

The number of grams in a ton is 1, 000, 000 grams. This means that the amount of protein needed is:

= 1. 25 x 1, 000, 000

= 1, 250, 000 grams

If you need to find the number of boxes which would be able to give you 1. 25 tons of proteins, the formula is:

= Amount of protein required / Protein per box

Solving gives:

= Amount of protein required / Protein per box

= 1, 250, 000 / 13

= 96, 154 boxes

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The shape is tetrahedral, ideal bond angle(s) is 60 degree, and the direction of any deviation is away from axis from those angles for IF₄⁻.

Bond angles affect how a molecule is structured as well. Bond angles are the angles that connect adjacent lines to form bonds. The bond angle can be used to differentiate between linear, trigonal planar, tetrahedral, trigonal-bipyramidal, and octahedral structures. The VSEPR theory is supported by the ideal bond angles, which demonstrate the maximum angle at which repulsion would be minimized.

In essence, bond angles show that electrons prefer to be far apart. Electrons make up negative ions. The opposites don't attract one another. Now draw a contrast. You don't want to interact with a negative individual because they are often thought of as unpleasant or harsh.

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Chromium, mercury, copper, and tin are heavy metals (Option C).

Heavy metals are a group of elements that have a density greater than 5 g/cm³. They include both toxic and non-toxic elements. Because of their density, they are often used in industry and manufacturing. However, many heavy metals are toxic and can cause serious health problems if ingested or inhaled in large amounts. Some of the common heavy metals include lead, mercury, chromium, copper, and tin.

Thus, the correct option is C.

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Answer:

The magnesium atom is larger.

Explanation:

The magnesium atom is larger because it is on the left side of the Periodic Table (period 3 and group 2) where the atomic radius is larger.

Atomic radius is the distance from the center of the nucleus of an atom to the most external electron shell.

The greater the columbic attractions, the closer the protons in the nucleus are to the electrons in the outer layers, making the size of the atom smaller.

Answer:

4.0 moles

Explanation:

Based on the given reaction between carbon and hydrogen, the equation of the reaction between O₂ and CO is as follows:

2CO(g) + O₂(g) → 2CO₂(g)    

The number of moles of O₂ needed to completely react with 8.0 moles of CO can be calculated knowing that 2 moles of CO react with 1 mol of O₂:

\( n_{O_{2}} = \frac{1 mol O_{2}}{2 moles CO}*8.0 moles CO = 4.0 moles O_{2} \)

Therefore, the number of moles of O₂ needed is 4.0.

I hope it helps you!