select the correct conversion factor for each step in the following roadmap for a substance with a density of 1 g/ml.
The appropriate conversion factor for a substance with the following density for each step in the road map is:Converting from grams to milliliters is as follows: 1. 1 g/ml 2. 1 ml = 0.001 L
What does milliliters mean?
The metric system frequently uses milliliters (mL) as a unit of capacity or volume measurement. One liter is equal to 1,000 milliliters, so it is one thousandth of a liter. A liquid or a solid's volume is measured in milliliters. 500 mL of water, for instance, could be found in a bottle of water. As they are frequently more accurate than other measurements, milliliters are also used to measure medication dosages.To learn more about milliliters
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a central atom with 3 bonding domains and 2 nonbonding domains has geometry. both nonbonding domains are in the plane since this allows the maximum average distance between nonbonding domains.
Tetrahedral is the shape of the molecule. Three bonding domains and two nonbonding domains exist for a centre atom that possesses geometry. Two nonbonding domains are present in the plane.
A number is said to be tetrahedral if it can be represented by the pyramidal shape known as the tetrahedron, which has three sides and a triangle base. The nth tetrahedral number is equivalent to the first n triangular numbers added together. A molecule is defined as a collection of two or more atoms held together by the attractive forces known as chemical bonds; depending on the context, the term may or may not include ions that fit this criteria. Atoms, the smallest unit of matter, exhibit the properties of a chemical element, such as hydrogen.
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The complete question is-
A central atom with 3 bonding domains and 2 nonbonding domains has geometry. both nonbonding domains are in the plane since this allows the maximum average distance between nonbonding domains. The shape of the molecule is ?
More reactive elements tend to be found in compounds with other elements. Elements that are less reactive are typically found in their elemental form (pure.) Based on what you saw in the reactions that occurred in this simulation (Galvanic cell simulation and half-reactions and net ionic equations), put the elements (Zn, Cu, Ag, H2, and Mg) in order from least reactive to most reactive. Explain how you developed your list. This list is called an activity series.
A galvanic cell is this configuration. A typical cell might be made up of two metal pieces, one made of copper and the other of zinc, both of which are submerged in a solution containing a dissolved salt of the corresponding metal.
The excess electrons that are left over after Zn2+ ions leave the zinc in the left cell could flow through the external circuit and into the right electrode if the copper and zinc were connected by a metallic conductor. There, they could be delivered to the Cu2+ ions that are "discharged," or changed into Cu atoms at the copper electrode's surface. Zinc is ultimately oxidized by copper(II) ions in this process.
Unlike Zn(s)+Cu2+Zn2++Cu(s)(16.2.1), where the oxidation and reduction processes (half reactions) take place in different places:
Zn(s) oxidation by Zn2+ and 2e- at the left electrode
Cu2+ + 2e-Cu(s) reduction at the right electrode
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The oxidation stateor oxidation number is a given to each based on the. It is the an atom would have if all shared were assigned to the with a attraction for those electrons. 2. To identify redox reactions using oxidation states, begin by assigning to each in the reaction A change in for the atoms indicates a redox reaction.
Each electron is given an oxidation number according to where it is located. Yes A change in the atoms' characteristics indicates a redox reaction. either the state or the oxidation number.
Based on where the electrons are located, is a number given to each atom. It represents the charge an atom would have if all of its shared electrons were allocated to it due to a higher attraction for those electrons. The oxidation state or oxidation number of each atom is represented by a number based on the distribution of its electrons. It represents the charge an atom would have if all of its shared electrons were allocated to it due to a higher attraction for those electrons.
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In all covalent bonds, valence electrons are ___
lost
gained
shared
shared
Explanation:Covalent bonds are characterized by the sharing of valence electrons.
Electronegativity
Covalent bonds occur between atoms that have similar electronegativity. Remember that electronegativity is how strongly an atom pulls electrons toward itself. So, if 2 atoms have similar electronegativities, then they will pull somewhat equally upon the electrons and share them. Most commonly, covalent bonds occur between nonmetals.
Ionic Bond
The second major form of bonding is ionic bonding. Ionic bonds form when there is a large difference in electronegativities. The difference is great enough that one of the atoms will completely lose one or more electrons, while the other will take the electrons. Since electrons are being transferred, the atoms become ions. Ionic bonds commonly occur between metals and nonmetals.
which of the followning equations best represents the reacting species in the reactio between zn metal and nicl2
Undoubtedly, the described reaction is a redox one.Redox reactions are defined as those that include a change in oxidation number, including both an increase and a drop in number.
Is Zn cl2 --> zncl2 a redox reaction?The described reaction is unquestionably a redox one.Redox reactions are those that include an alteration in the quantity of oxidations present, including both an increase and a decrease.If this doesn't happen, the response is non-redox.One of the numerous forms of redox reactions is the decomposition process. Blended Reaction.Removal Reaction.The reduction of the sulfur is brought about by the zinc, which gains electrons.Thus, the term "reducing agent" refers to zinc.Anode-based oxidation always entails the loss of electrons.Considering that oxidation is taking place in the Zn2+(aq)/Zn(s) half cell, zinc is the logical anode.The electrode's Zn atoms lose two electrons and become Zn2+, which is then present in the solution (aq).To learn more about Redox reactions refer
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blood plasma is forced into the alveoli and interstitial space when which of the following becomes too high?
A. bound to hemoglobin; associated with bicarbonate ions in the plasma
B. dissolved in plasma; associated with salt or acid
C. bound to hemoglobin; bound to albumin
D. bound to plasma proteins; carried as carbon dioxide
E. combined with albumin; associated with carbonic acid
Blood plasma is forced into the alveoli and interstitial space when bound to hemoglobin; bound to albumin.
When the pressure in the alveoli and interstitial space becomes too high, blood plasma is forced into these spaces. This pressure is known as pulmonary edema. In the lungs, the pressure can be increased by factors such as heart failure, where the heart is not able to pump blood effectively, leading to a build-up of pressure in the lungs. One of the causes of this high pressure is the high amount of fluid in the blood vessels. This fluid is composed of plasma, which is mostly water but also contains dissolved ions, proteins, and dissolved gases such as oxygen and carbon dioxide. The fluid that is forced out of the vessels is composed of the plasma and the proteins that are bound to the plasma, including albumin.
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Write the net ionic equation for the following molecular equation.HBr is a strong electrolyte. HF is a weak electrolyte.KF(aq) + HBr(aq) → KBr(aq) + HF (aq)(Use the lowest possible coefficients. Be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.)
The chemical equation used for a chemical reaction involving ionic species is called the complete ionic equation.
What is a net ionic equation?The chemical equation known as the net ionic equation only displays the substances that are directly involved in the chemical process.By dissolving all soluble ionic chemicals (those denoted with a (aq)) into their corresponding ions, the ionic equation can be written. To demonstrate that an ion is present in solution, it should be displayed with its charge and a (aq). To display the quantity of each ion present, use coefficients.A complete ionic equation also contains the spectator ions, whereas a net ionic equation just displays the chemical species that are involved in a reaction.A chemical equation for a process known as the net ionic equation only includes the species that are really involved in the reaction. In double displacement reactions, redox reactions, and acid-base neutralisation processes, the net ionic equation is frequently employed.The corresponding ionic equation is:
{eq}K^{+}(aq) + CH_{3}COO^{-}(aq) + H^{+}(aq) + Br^{-}(aq) ⇒K^{+}(aq) + Br^{-}(aq)
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Find the percent composition of each element in CaSO4. Be sure to add the % sign
and the element.
*Ca is the 1st blank*
*S is the 2nd blank*
*O is the 3rd blank*
The percent composition of each element in CaSO4. S 1 23.21 O 4 46.32 Ca 1 29.00.
What does CaSO4 stand for?A calcium salt that occurs naturally is calcium sulphate, or CaSO4. It is most generally referred to as gypsum when it is present as the dihydrate CaSO42H2O. The sulphate is used as a soil conditioner as uncalcined gypsum.The recognised value for the mass percentage of water in the hydrated compound CaSO4•2H2O is 20.9%.The formula for percent composition is 100 multiplied by (mass of element/molecular mass).A compound's percentage composition is calculated by dividing the amount of each ingredient by the sum of all the individual elements in the compound and multiplying the result by 100.To learn more about percent composition refer to:
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the conversion of acetyl chloride to methyl acetate occurs via the following 2-step mechanism: this conversion of acetyl chloride to methyl acetate would be classified as a reaction
A tenfold rise in acetyl chloride concentration corresponds to a tenfold increase in reaction rate.
What is methyl acetate?Methyl acetate is a carboxylate ester with the formula CH3COOCH3, commonly known as MeOAc, acetic acid methyl ester, or methyl ethanoate. It is a combustible liquid with a distinct flavor that smells something like glue and some nail polish removers. Colorless and smelling like fruit, methyl acetate is a liquid. As a solvent, it is utilized in the production of medications as well as lacquers and paint removers.Different issues are brought up by additional common solvents. For instance, methyl acetate is more hazardous than acetone if inadvertently consumed, so producers use it to give the nail paint remover a harsh taste. It may irritate the eyes, nose, and throat when exposed to ethyl acetate in excess. Overexposure that is too severe might make a person weak, sleepy, and unconscious.To learn more about methyl acetate refer to:
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The colorless, odorless, tasteless gas carbon monoxide, CO2 is a by – product of incomplete combustion of any material that contains the element carbon. Calculate the volume, in liters, occupied by 1.52 moles of this gas at 0.992 atm pressure and a temperature of 65oC.
look at the picture
which letters indicate the nucleophilic and electrophilic sites in the reactants of the reaction shown?
Nucleophiles are electron-rich and are attracted to electrophiles which are electron-deficient in a chemical reaction forming new chemical bonds.
Nucleophilic and electrophilic are terms used in organic chemistry to describe the reactivity of atoms or molecules in chemical reactions. Nucleophiles are atoms or molecules that have a spare electron pair and are attracted to positively charged atoms or regions (electrophiles).
These electron-rich species tend to react with electron-deficient species, called electrophiles, which have a partial positive charge. In chemical reactions, nucleophiles are attracted to electrophiles, and the two react to form a new chemical bond. This process is known as nucleophilic substitution or nucleophilic addition.
For example, in the nucleophilic substitution reaction of a halide with a strong nucleophile like hydroxide, the nucleophile donates its electrons to form a new bond with the electrophile (halide) which gets replaced by the nucleophile.
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The correct question is:
What is nucleophilic and electrophilic?
all of the following processes take place at 1 atm pressure and constant temperature. which (if any) of them have w > 0?
Processes that involve a decrease in volume will have w > 0. This is because work is being done by the system in order to decrease its volume, which means that energy is being transferred to the surroundings.
What is the process that takes place in 1 atm pressure and constant temperature?Processes that involve an increase in temperature will have w > 0. This is because work is being done on the system in order to increase its internal energy, which means that energy is being transferred to the system from the surroundings.Processes that involve a change in the number of moles of a gas will have w > 0 if the number of moles is decreasing. This is because work is being done by the system as it loses moles, which means that energy is being transferred to the surroundings.Processes that involve a change in the phase of a substance (e.g. melting, boiling, condensation) will have w > 0 if the substance is changing from a solid to a liquid or from a liquid to a gas. This is because work is being done by the system as it changes phase, which means that energy is being transferred to the surroundings.Overall, the processes that have w > 0 are:a decrease in volumean increase in temperaturea change in the number of moles of a gas (decreasing)a change in the phase of a substance (from solid to liquid, or liquid to gas).To learn more about constant temperature refer:
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Using the Solubility Rules, determine if each of the following compounds is soluble in water or not:KC2H3O2Al2S3ZnSO4
KC2H3O2: This compound is soluble in water. This is because it contains a polyatomic ion (potassium acetate) that is soluble in water according to the solubility rules.
Solubility is the ability of a substance to dissolve in a solvent, such as water, to form a homogeneous solution. A solute is a substance that is dissolved in a solvent, and a solvent is a substance that a solute dissolves in. Solubility can be affected by temperature, pressure, and the presence of other solutes. Solubility can also vary from one solute to another, depending on the physical and chemical properties of the solute. Some substances are highly soluble, while others are only slightly soluble.
Al2S3: This compound is not soluble in water. This is because it contains an insoluble ionic compound (aluminum sulfide) according to the solubility rules.
ZnSO4: This compound is soluble in water. This is because it contains a soluble ionic compound (zinc sulfate) according to the solubility rules.
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FILL IN THE BLANK lemon juice has a ph of about 2.0, compared to a ph of about 1.0 for stomach acid. therefore, the concentration of h in stomach acid is_______than that of lemon juice.
The concentration of h in stomach acid is 10 times higher than that of lemon juice.
What is concentration ?
A solution's concentration is determined by how much solute has been dissolved in a given amount of solvent or solution. A concentrated solution is one in which the amount of dissolved solute is substantial. A solution is considered to be diluted when there is just a trace amount of dissolved solute present in it.
What is ph?
Water's pH determines how acidic or basic it is. ranging from 0 to 14, with 7 denoting neutrality. pH levels below 7 indicate acidity, whereas pH values above 7 demonstrate baseness. In reality, the pH of water is a measurement of the amount of free hydrogen and hydroxyl ions present in the solution.
Therefore, concentration of h in stomach acid is 10 times higher than that of lemon juice.
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A 0.160-g sample of unknown metal (X) reacts with hydrochloric acid to produce 66.5 mL of "wet" gas at 20°C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20°C is 18 mm Hg.)
1X(s) + 4 HCl(aq) → 1 XCl4(aq) + 2 H2(g)
The unknown metal (X), given that it reacts to produce 66.5 mL of "wet" gas at 20 °C and 754 mm Hg is palladium (Pd)
How do I determine the identity of the metal X?We'll begin by obtaining the number of mole of the gas, H₂ produced. Details below:
Temperature (T) = 20 °C = 20 + 273 = 293 KVolume (V) = 66.5 mL = 66.5 / 1000 = 0.0665 L Pressure (P) = 754 - 18 = 736 mmHg = 736 / 760 = 0.968 atmGas constant (R) = 0.0821 atm.L/Kmol Number of mole (n) =?PV = nRT
0.968 × 0.0665 = n × 0.0821 × 293
Divide both sides by (0.0821 × 293)
n = (0.968 × 0.0665) / (0.0821 × 293)
n = 0.003 mole
Next, we shall determine the mole of the metal. Details below:
X(s) + 4HCl(aq) → XCl₄(aq) + 2H₂(g)
From the balanced equation above,
2 moles of H₂ were obtained from 1 mole of X
Therefore,
0.003 moles of H₂ will obtained from = 0.003 / 2 = 0.0015 mole of X
Finally, we shall determine the identity of the metal by obtaining it's molar mass. Details below:
Mole of metal X = 0.0015 moleMass of metal X = 0.160 gMolar mass of metal X =?Molar mass = mass / mole
Molar mass of X = 0.160 / 0.0015
Molar mass of X = 106.7 g/mol
Since the molar mass of the metal X is 106.67 g/mol, we can conclude that the identity of the metal is palladium (Pd)
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Bromine monochloride is synthesized using the reaction Br2(g)+Cl2(g)↽−−⇀2BrCl(g)p=1.1×10−4 at 150 K A 201.0 L flask initially contains 0.902 kg of Br2 and 1.066 kg of Cl2. Calculate the mass of BrCl , in grams, that is present in the reaction mixture at equilibrium. Assume ideal gas behavior.
The mass of BrCl that is present in the reaction mixture at equilibrium is 0.519 grams
What is a mass of BrCl?Generally, To calculate the mass of BrCl present at equilibrium, we need to use the equilibrium constant expression (Kp) for the reaction:
Kp = [BrCl]^2 / [Br2] [Cl2]
where [BrCl], [Br2], and [Cl2] are the concentrations of the respective gases at equilibrium.
Since we know the initial amounts of Br2 and Cl2, and the volume of the flask, we can calculate the initial concentrations of each gas.
[Br2]_initial = 0.902 kg / (201.0 L * 0.08206 Latm/molK * 150 K)
= 0.0014 mol/L [Cl2]_initial
= 1.066 kg / (201.0 L * 0.08206 Latm/molK * 150 K)
= 0.0017 mol/L
We are also given the value of Kp, so we can substitute the initial concentrations into the Kp expression and solve for [BrCl].
Kp = [BrCl]^2 / 0.0014 mol/L * 0.0017 mol/L
= (1.1×10^-4)
[BrCl] = √(Kp * [Br2]_initial * [Cl2]_initial)
=√(1.1×10^-4 * 0.0014 mol/L * 0.0017 mol/L)
= 1.61802349*10^{-5} mol/L
To convert molarity to mass, we need to multiply the molarity by the molar mass of BrCl.
The molar mass of BrCl is
(2 * 79.904 g/mol) = 159.808 g/mol.
mass of BrCl = [BrCl] * V * M
=1.61802349*10^{-5}mol/L * 201.0 L * 159.808 g/mol
= 0.519 grams
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Which factor does NOT influence the preferential discharge of an ion at the anode during electrolysis of an aqueous electrolyte?
the position of an ion in the electrochemical series
the strength of the electrolyte
the type of anode
the concentration of the electrolyte
The factor that does NOT influence the preferential discharge of an ion at the anode during electrolysis of an aqueous electrolyte is the strength of the electrolyte.
The correct option is B.
What is electrolysis?Electrolysis is a method used in chemistry and industry to force a chemical reaction that would not otherwise occur naturally. Commercially speaking, electrolysis is a crucial step in the electrolytic cell-based separation of elements from naturally existing sources like ores.
The factors that influence the preferential discharge of an ion at the anode during the electrolysis of an aqueous electrolyte are:
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A 50 mL solution of strong acid of pH = 1 is mixed with a 50 mL solution of strong acid of pH = 2. The pH of the mixture will be :
(log105.5=0.74AB1.26C1.76D
The pH of the mixture will be approximately 1.04 (Option A).
The pH of an acid solution is defined as the negative logarithm of the hydrogen ion concentration. Since both solutions are strong acids, they will have a high hydrogen ion concentration and a low pH. The pH of the first solution is 1, and the pH of the second solution is 2, which means the first solution has a hydrogen ion concentration of 10^-1 M and the second solution has a hydrogen ion concentration of 10^-2 M.
When the solutions are mixed, the final hydrogen ion concentration will be the sum of the initial concentrations.final [H+] = [H+]1 + [H+]2 = 10^-1 M + 10^-2 M = 1.1*10^-1 M
So, the pH of the mixture is:
pH = -log(11 x 10^-2) = -log(11) + log(10^-2) = 1.04. Therefore, the answer is A (1.04).
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in a laboratory experiment hydrogen gas, h2, could be produced by adding nitric acid, hno3 to which of the following?
Option B, Nitric acid corrosive (HNO3) could be used to deliver hydrogen gas (H2) to zinc (Zn).
Nitric acid corrosive (HNO3) reacting with a metal in a lab experiment can deliver hydrogen gas (H2) to the system. The "nitric basic analysis" refers to this response. Zinc (Zn) is the metal that responds to nitric acid by corroding and releasing hydrogen gas.
When nitric corrosive is added to zinc, the reaction results in the production of hydrogen gas and nitrate salt as the end products.
Exothermic in nature, this response releases heat, and the resulting combustible hydrogen gas. To determine the presence of zinc in an example and focus on the properties of hydrogen gas, one can use the reaction between nitric corrosive and zinc.
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The question is -
In a laboratory experiment hydrogen gas, h2, could be produced by adding nitric acid, hno3 to which of the following?
a. Mg
b. Zn
c. Cu
d. Hg
?Al + ?H2SO4 → ?Al2(SO4)3 +3H2
How many grams of Al would you need to start with in order to make 1.5 moles of H2?
____________g Al
The Correct answer is 675 grams.
To arrive at this answer, we used the balanced equation for the reaction of Al + H2SO4 → Al2(SO4)3 + 3H2.
This equation tells us that for every 3 moles of H2 produced, 1 mole of Al is needed.
Therefore, if we want to make 1.5 moles of H2, we would need 0.5 mole of Al. The molar mass of Al is 26.98 g/mol, so 0.5 mole of Al would have a mass of 13.49 grams.
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How many particles are in 65 grams carbon tetraflorde
65 grams of carbon tetrafluoride contain 0.73860 moles of particles. One carbon (C) and four fluorine (F) atoms make up one molecule of carbon tetrafluoride (CF4) .
What's a mole?The quantity of a substance with the same number of chemical species—atoms, molecules, ions, etc.—is referred to as a mole. as the carbon-12 isotope is 12 grams of constituents.
Carbon tetrafluoride is what?Carbon tetrafluoride is a substance with the chemical formula CF4. It is used as a refrigerant to cool the metal's application environment to reduce the rate of corrosion. It is colorless. Carbon tetrafluoride may also be referred to as tetrafluoromethane.
How many atoms in CF4 are bonded together?The central carbon atom unites all four fluorine atoms in the Carbon Tetrafluoride molecule. We take a quick look at the CF4 molecule Lewis structure to determine the hybridization. Carbon and fluorine are connected by four covalent bonds.
Therefore, 65 grams of carbon tetrafluoride contain 0.73860 moles of particles.
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Suppose an iron-58 nuclide transforms into an iron-59 nuclide by absorbing a neutron. Complete the nuclear chemical equation below so that it describes this nuclear reaction. 59 26 Fe
Refer to the attachment.
Many different arrangements of electrons in an atom (configurations) are possible. One configuration will always be lowest in energy. This most stable configuration of an atoms electrons is called the ground state We can identify the ground state of most atoms by determining if a configuration obeys all three of the basic ground state rules (auf bau principle, Hund's rule, and the Pauli Exclusion principle). For each of the following configurations, indicate if the configuration is a ground state or which of the three ground state rules it violates 1s 2s 2p 3d 4p 1s 2s 2p 4s 3d 4p 2p 1s 2s 3s 3p 4s 4p configuration (a) I Choose l configuration (b) Choose ] configuration(c) Choose ] configuration
Configuration (a) is a ground state. Configuration (b) violates Hund's rule. Configuration (c) violates the Pauli Exclusion principle.
What is configuration?Configuration is the process of organizing the components of a computer or network to establish the way it will operate. It involves setting up the hardware, software, and network connection in order to make the system function correctly. Configuration also includes the selection of device drivers, software settings, and user accounts. Configuration is important to ensure the system is secure, efficient, and well-suited to the user's needs.
(a) 1s2s2p3d4p is a ground state configuration.
(b) 1s2s2p4s3d4p violates the Aufbau Principle which states that electrons must fill lower energy levels first before moving to higher energy levels.
(c) 2p1s2s3s3p4s4p violates the Pauli Exclusion Principle which states that no two electrons can have the same set of quantum numbers.
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how many moles are in 1.2 kg of ammonia, HN3?
Answer:
70.5882352941 moles
Explanation:
Moles= Mass/Molar mass
12000/17
= 70.5882352941 moles
Explanation:
one mole of ammonia= 6.02 × 10²³
But one mole is 17grams
17 grams = 6.02 × 10²³
1200 grams = (1200 × 6.02 × 10²³) ÷ 17
Which of the following electron configurations is for an inert gas and explain why?
(A) 1s22s22p63s23p6
(B) 1s22s22p63s2
(C) 1s22s22p63s23p64s1
(D) 1s22s22p63s23p63d24s2
(A)1s22p63s23p6 Gases classified as inert are those that do not react with any other substances or elements due to their stability
Inert gases don't participate in the combustion process and don't interact with other substances A room or small area filled with an inert gas will have less oxygen which will slow the fire's ability to burn. In order to prevent water damage inert gases are employed in extinguishing systems in places like rooms containing electrical equipment. Depending on the parameters taken into consideration different categorization schemes for dangerous gases may be considered Here two concepts chemical and toxicological classifications are utilised The nature of the components that make up gases, such as carbon nitrogen, sulphur phosphorus halogen compounds and halogenated compounds, etc is generally used to classify chemicals Chemical categorization of toxins
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(A)1s22p63s23p6 Gases classified as inert are those that do not react with any other substances or elements due to their stability
Inert gases don't participate in the combustion process and don't interact with other substances A room or small area filled with inert gas will have less oxygen which will slow the fire's ability to burn. In order to prevent water damage inert gases are employed in extinguishing systems in places like rooms containing electrical equipment. Depending on the parameters taken into consideration different categorization schemes for dangerous gases may be considered Here two concepts chemical and toxicological classifications are utilized The nature of the components that make up gases, such as carbon-nitrogen, sulfur phosphorus halogen compounds and halogenated compounds, etc is generally used to classify chemicals Chemical categorization of toxins
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Airbags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction.2NaN3(s)→2Na(s)+3N2(g)What mass of NaN3(s) must be reacted in order to inflate an airbag to 73.1 L at s.t.p?
To inflate an airbag to 73.1 L at s.t.p., we need to know the moles of gas produced by the decomposition of sodium azide. We can use the Ideal Gas Law, PV = nRT, to calculate this.
We know that P = 1 atm (s.t.p.), V = 73.1 L, R = 0.08206 Latm/molK, and T = 273 K (0 °C).
Rearrange the Ideal Gas Law to n = PV/RTn = (1 atm * 73.1 L) / (0.08206 Latm/molK * 273 K)
n = 0.26 moles of N2 gas
Since 2 moles of N2 are produced per mole of NaN3, we can divide the number of moles of N2 by 2 to find the number of moles of NaN3.
n(NaN3) = n(N2) / 2n(NaN3) = 0.26 moles / 2 = 0.13 moles. To find the mass, we multiply the number of moles by the molar mass of NaN3.
mass(NaN3) = n(NaN3) * molar mass(NaN3)
mass(NaN3) = 0.13 moles * 65.01 g/mol ≈ 8.45 g
So, 8.45 g of NaN3 is needed to inflate an airbag to 73.1 L at s.t.p
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check the box next to each molecule on the right that has the shape of the model molecule on the left:
The BrF4- is the box next to each molecule on the right that has the shape of the model molecule on the left.
What is molecule?
A molecule is the smallest particle in a chemical element or compound that possesses the properties of that element or substance. Atoms bound together by chemical bonds form molecules. There are two different kinds of molecules.
What is atom ?
An atom is a specific kind of material particle that makes up a chemical element. The core nucleus of an atom is surrounded by either many negatively charged electrons or a positively charged electron. The positively charged nucleus is made up of two comparatively large particles called protons and neutrons.
Since hybridisation of central atom(Br) is sp3d2 so geometry of molecule is octahedral but Br have 2 lone pair of electron in axial position so shape is square planar.
Therefore, BrF4- is the box next to each molecule on the right that has the shape of the model molecule on the left.
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A solution with 8.35 g of a non-electrolyte solute in 50.0 g naphthalene (Kfp = 6.90°C/m) freezes at 76.5°C. Pure naphthalene freezes at 81.0°C. What is the molar mass of the solute?
A solution with 8.35 g of a non-electrolyte solute in 50.0 g naphthalene (Kfp = 6.90°C/m) freezes at 76.5°C. Pure naphthalene freezes at 81.0°C. The molar mass of the non-electrolyte is 256.134g /mol
What is molar mass ?The term molar mass is defined as the mass in grams of one mole of the compound.
Given:
Naphthalene usually freezes at 81°C
New Freeing Point = 76.5°C
Depression in freezing point
= 81°C - 76.5°C
= 4.5°C
We know depression in freezing point is given by the formula as below;
Kf x m
where m is the molarity
So, 4.5oC = 6.90°C/m x m
m = 0.652m
Molality = moles of solute dissolved per kilogram of solvent
50g of naphthalene is the solvent
50g = 0.05kg
Molality = moles of solute / 0.05
0.652 x 0.05 = moles of solute
Therefore, there are 0.0326 moles of non- electrolyte
0.0326 moles make 8.35g
So, in 1 mole there are 256.134g
Thus,the molar mass of the non-electrolyte is 256.134g /mol.
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complete the diagram to show how clouds form when warm, moist air rises and cools
Use the words: evaporation, cooling air, condensation, and particles
When the vaporized water in the air condenses to form visible water droplets or ice crystals, clouds are created. When a parcel of air becomes saturated, it can no longer hold all the water it contains in vapor form and begins to condense into a liquid or solid.
What are clouds?A cloud is a collection of ice or water vapor floating in the atmosphere.
Cloud formation involves the following processes:
evaporation - this is the process where liquid water changes to gas and rises into the atmosphere
condensation - this occurs as a result of cooling air in the atmosphere converting forming visible water droplets or ice crystals on dust particles.
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