The constants for the first row of the gas laws table, given the equation PV = k, are temperature and moles of gas, as per Boyle's law, which relates pressure and volume at constant temperature and amount of gas.
Explanation:The constants that would most likely be filled in the first row of the table, where the equation is PV = k, would be temperature and moles of gas. This equation represents Boyle's law, which states that for a given mass of an ideal gas at constant temperature, the volume is inversely proportional to the pressure. In other words, if the temperature and the amount of gas (in moles) are kept constant, the product of the pressure and volume will always be constant (k).
It is important to note that in gas laws, temperatures must always be expressed in kelvins because these laws are derived based on absolute temperatures. Boyle's law is one of several gas laws that describe the behavior of ideal gases under various conditions of pressure, volume, and temperature.
Which element(s) is being reduced in the redox reaction below? 6 nh4clo4 (s) + 10 al(s) 5 al2o3 (g) + 6 hcl (g) + 3 n2 (g) + 9 h2o (g) n and al h cl o?
The enzyme urease catalyzes this reaction. If urease is added to a solution that contains ammonia and other nitrogen-containing compounds (but no urea), will the urease catalyze any reactions? E
Urease is an enzyme.
Enzymes are highly specific in the reactions they catalyze.
Enzymes can typically bind only to the substrate(s) for the reaction they catalyze.
If the solution contains no urea, urease will not bind to any of the substances in the solution, so it will not catalyze any reactions in the solution.
are the answers for edg
At what temperature would 0.500 moles of gas particles stored in a 100.0 mL container reach a pressure of 15.0 atm?
A) 36500 K
B) 7.96 K
C) 36.5 K
D) 3.60 K
Answer: Option (C) is the correct answer.
Explanation:
According to ideal gas law, product of pressure and volume equals n times R times T.
Mathematically, PV = nRT
where P = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
Since it is known that value R = 0.082 L [tex]atm mol^{-1} K^{-1}[/tex] and the other values are given as P = 15.0 atm, V = 100 mL = 0.1 L, and n = 0.5 moles.
Therefore, calculate value of temperature as follows.
PV = nRT
[tex]15 atm \times 0.1 L[/tex] = [tex]0.5 moles \times 0.082 L atm mol^{-1} K^{-1} \times T[/tex]
T = 36.58 K
Thus, we can conclude that temperature is 36.5 K.
Which of the following is not a step in balancing redox reactions in acidic solution, using the half-reaction method?
A) H2O and OH- are added as needed to the half-reaction equations to make the number of oxygen and hydrogen atoms balance.
B) Divide the chemical equation into two half-reaction equations, identifying which half-reaction is oxidation and which is reduction.
C) H2O and H+ are added as needed to the half-reaction equations to make the number of oxygen and hydrogen atoms balance.
D) Multiply each term in one of the half-reaction equations by a factor that will make the number of electrons lost (in the oxidation) equal to the number of electrons gained (in the reduction).
Answer:
The answer would be A). H2O and OH- are added as needed to the half-reaction equations to make the number of oxygen and hydrogen atoms balance.
Which indicator most likely suggests that a chemical change is taking place?
change in size
change of color
change of state
change in shape
Change in color is an indicator which most likely suggests that a chemical change is taking place. Most of the chemical indicators show a change in color with a proceed in the process. Thus, the correct option is B.
What are chemical indicators?
A chemical change occurs when a new substance (product) is formed or the original substance changes its identity and composition in presence of certain conditions due to a chemical reaction.
Chemical change is the opposite of a physical change which results due to modifications only in the physical properties such as the state or shape of matter. Moreover, a chemical reaction can be identified as it often leads to a change in color, odor, the emission of gases or temperature change. This implies that a chemical change is a change of color as this occurs if the composition of a substance change.
Therefore, the correct option is B.
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In ammonium chloride salt (nh4cl) the anion is a single chloride ion, cl. what is the cation of nh4cl
Why is a pencil used to mark the chromatogram instead of pen?
The correct symbol for the ion formed by nitrogen is:
The ion formed by nitrogen is N³⁻, also known as a nitride ion. In an ionic compound with aluminum, Al³⁺ forms the cation, and C⁴⁻ forms the anion called the carbide ion.
The correct symbol for the ion formed by nitrogen is N³⁻. Nitrogen, being in group 15 of the periodic table, is a nonmetal and thus forms negative ions, known as anions. A nitrogen atom will gain three electrons to achieve the electron configuration of neon, the next noble gas, resulting in the formation of a nitride ion with a 3- charge.
When is alpha particle emission most likely to occur?
A. When the nucleus has more than 83 protons.
B.When the ratio of neutrons to protons in the nucleus is too high to be stable. C.When the nucleus has a mass of more than 83 amu.
D. When the ratio of neutrons to protons in the nucleus is not exactly balanced.
The alpha particle emission is most likely to occur when the ratio of neutrons to protons present in the nucleus of an atom is too high to be stable.
What is an atom?An atom can be defined as the smallest unit of matter which then forms an element. Every form of matter whether solid,liquid , gas is made of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged particles in an atom and neutrons are neutral in charge as the charges are cancelled and hence the nucleus is positively charged species. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar to one another as they have same number of sub- atomic particles which on combining do not alter the chemical properties of the substances.
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Which graph is used to show change in a given variable when a second variable is changed?
What would happen to the concentration of the products if more reactants were added to a reaction that was in chemical equilibrium? how would this addition affect the equilibrium?
Final answer:
Adding reactants to a chemical reaction at equilibrium will cause an increase in the concentration of products as the system shifts to the right to re-establish equilibrium. The equilibrium constant remains the same, indicating the ratio of products to reactants remains constant at the new equilibrium state.
Explanation:
When additional reactants are added to a chemical reaction that is in equilibrium, the system will respond according to Le Chatelier's Principle. The concentration of the products will increase as the reaction shifts to the right in an effort to re-establish equilibrium by converting the added reactants into products. The equilibrium is said to be 'shifted to the products' or 'shifted to the right' as a result of this stress.
In a specific example, if more Fe is added to a reaction at equilibrium, the concentration of products would increase as the reaction consumes some of the added Fe to form more product. Similarly, if H₂O is removed from an equilibrium mixture, the reaction will shift to produce more H₂O, resulting in an increased concentration of H₂O and a reduced concentration of the products that would form when H₂O is used as a reactant. If H₂ is added to the mixture, the reaction will shift to use up the added H₂, leading to an increased production of products and a decrease in H₂ concentration until the new equilibrium is established.
Ultimately, when the system reaches a new equilibrium after the addition of reactants or removal of products, the concentrations of reactants and products will be different from the initial state, but the equilibrium constant (Kc) for the reaction will remain the same. This indicates that at the new equilibrium, the ratio of products to reactants remains constant even though their individual concentrations may have changed.
Gaseous ethane ch3ch3 will react with gaseous oxygen o2 to produce gaseous carbon dioxide co2 and gaseous water h2o . suppose 18. g of ethane is mixed with 85.4 g of oxygen. calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. round your answer to 2 significant digits.
The maximum mass of carbon dioxide that could be produced by the reaction will be 53 g
Stoichiometric calculationFrom the equation of the reaction:
2C2H6 +7O2 ---> 4CO2 + 6H2O
Mole of 18 g ethane = 18/30
= 0.6 moles
Mole of 85.4 g O2 = 85.4/32
= 2.67 moles
mole ratio of ethane and oxygen gas = 2:7
Thus, O2 gas seems to be in excess and C2H6 is the limiting reagent.
Mole ratio of C2H6 and CO2 = 1:2
Equivalent mole of CO2 = 0.6 x 2
= 1.2 moles
Mass of 1.2 moles CO2 = 1.2 x 44.01
= 52.81
= 53 g to 2 significant digits
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The maximum mass of carbon dioxide that could be produced by the chemical reaction is 52.8 g.
Explanation:To find the maximum mass of carbon dioxide produced in the reaction, we need to determine the limiting reagent, which is the reactant that is completely consumed first. We can do this by comparing the moles of ethane and oxygen and calculating how many moles of carbon dioxide can be produced from each.
First, calculate the number of moles of ethane:
Mass of ethane = 18 g
Molar mass of ethane = 2(12.01 g/mol) + 6(1.01 g/mol) = 30.07 g/mol
Moles of ethane = mass of ethane / molar mass = 18 g / 30.07 g/mol = 0.599 mol
Next, calculate the number of moles of oxygen:
Mass of oxygen = 85.4 g
Molar mass of oxygen = 2(16.00 g/mol) = 32.00 g/mol
Moles of oxygen = mass of oxygen / molar mass = 85.4 g / 32.00 g/mol = 2.67 mol
Now we can compare the mole ratios of ethane and oxygen in the balanced chemical equation:
2 moles of ethane react with 7 moles of oxygen to produce 4 moles of carbon dioxide.
Using the mole ratios, we can calculate the number of moles of carbon dioxide produced:
Moles of carbon dioxide = (0.599 mol ethane) x (4 mol CO2 / 2 mol ethane) = 1.20 mol CO2
Finally, we can calculate the maximum mass of carbon dioxide:
Mass of carbon dioxide = moles of carbon dioxide x molar mass of carbon dioxide = 1.20 mol x 44.01 g/mol = 52.8 g
Therefore, the maximum mass of carbon dioxide that could be produced is 52.8 g, rounded to 2 significant digits.
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In naming the compound pcl5 the prefix used with the second element is
In PCl₅, P the first element is phosphorus. Cl is the second element chlorine and chlorines ide name is chloride. PCl₅ is called as phosphorus pentachloride.
What is phosphorus pentachloride ?A crystalline substance that is greenish-yellow in color and has an offensive smell is phosphorus pentachloride. Water breaks it down into heat, hydrochloric acid, and phosphoric acid. This heat may be enough to start nearby combustible stuff on fire.
It is quite similar to identifying basic ionic compounds to name binary (two-element) covalent compounds. The first component of the formula is only the element's name mentioned. By taking the element name's stem and adding the suffix -ide, the second element is given a name.
Prefixes are used to define the number of atoms of each element in a compound's molecule because molecules of molecular compounds might generate compounds with varied ratios of their constituent elements. Ones that come to mind include SF6, sulfur hexafluoride,
Thus, PCl₅ is called as phosphorus pentachloride.
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Write out the balanced equation for the reaction that occurs when Ca and NaCl react together. You do not need to make your subscripts smaller; just write them out as regular numbers. For example: H2O.
What precipitate will form when aqueous solutions of sodium carbonate (na2co3) and calcium chloride (cacl2) are mixed?
CaCO₃ will precipitate when aqueous solutions of sodium carbonate and calcium chloride are mixed
Further explanationThere are two types of chemical reactions that may occur.
namely single-replacement reactions and double-replacement reactions.
1. A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
Not all of these reactions can occur. We can use the activity series, which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.
This series is better known as the Volta series, where the metal element with a more negative electrode potential is on the left, while the element with a more positive electrode potential on the right.
The more left the position of a metal in the series, the more reactive metal (easy to release electrons, the stronger the reductor)
Generally, the Volta series used is
Li K Ba Sr Ca Na Mg Al Mn Zn Cr Fe Cd Co Ni Sn Pb H Sb Bi Cu Hg Ag Pt Au
Example:
2Al (s) + 3Zn (NO₃) ₂ (aq) → 2Al (NO₃) ₃ (aq) + 3Zn (s)
The existing aluminum element can replace the zinc element, which is on the right side so the reaction will occur.
2. Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur
Solubility Rules:
1. soluble compoundAll compounds of Li +, Na +, K +, Rb +, Cs +, and NH4 +
All compounds of NO₃⁻ and C₂H₃O₂⁻
Compounds of Cl−, Br−, I− except Ag⁺, Hg₂²⁺, Pb²⁺
Compounds of SO₄²⁻ except Hg₂²⁺, Pb²⁺, Sr²⁺, Ba²⁺
2. insoluble compoundsCompounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ +
Compounds of OH− except Compounds of Li +, Na +, K +, Rb +, Cs +, NH₄⁺, Sr²⁺, and Ba²⁺
In reaction:
sodium carbonate (Na₂CO₃) and calcium chloride (CaCl₂)
Na₂CO₃ (aq) + CaCl₂ (aq) ⇒ 2NaCl (aq) + CaCO₃ (s)
The precipitated compound is CaCO₃ so that Double-Replacement reactions between Na₂CO₃ and CaCl₂ can occur
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substance loses electrons in a chemical reaction
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A reversible reaction at equilibrium can counteract the stress of an increase in pressure by:
The graph above shows the progress of a chemical reaction. Based on the graph, which of the following is true?
Select one: a. Reaction A is enzyme-catalyzed, while reaction B is not enzyme-catalyzed. b. Reaction A is not enzyme-catalyzed, while reaction B is enzyme-catalyzed. c. Reaction A uses cofactors, while reaction B does not use cofactors. d. Reaction A does not use cofactors, while reaction B uses cofactors.
Answer: b. Reaction A is not enzyme-catalyzed, while reaction B is enzyme-catalyzed
Explanation:
Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products. It is the difference between the energy of activated complex and energy of reactants.
A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more molecules can cross the energy barrier and convert to products.
The catalyst itself does not take part in the chemical reaction and is regenerated as such at the end.
What is the net ionic equation of the reaction of mgso4 with bacl2? express your answer as a chemical equation?
Which process is spontaneous? electrolysis of water into oxygen and hydrogen spreading of a strong fragrance of perfume in a room separation of sodium and chlorine from sodium chloride removal of iron fillings from a mixture by using a magnet?
Among all the given options, the correct option is option B. Spreading of a strong fragrance of perfume in a room is a spontaneous process.
What is spontaneous process?A spontaneous process refers to one that happens by itself, without external energy input. A ball would roll down an incline, water will flow downward, melting ice into water, radioactive elements will degrade, and iron will rust, for instance.
A nonspontaneous process is the opposite of a spontaneous process; it requires the addition of energy to take place. For instance, rust doesn't spontaneously transform back into iron; a daughter isotope cannot return towards its parent state. Spreading of a strong fragrance of perfume in a room is a spontaneous process.
Therefore, the correct option is option B.
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The spontaneous process among the options is the spreading of a strong fragrance of perfume in a room, driven by diffusion. The other processes require external energy to occur and are not spontaneous.
Among the processes listed, the only spontaneous process is the spreading of a strong fragrance of perfume in a room. This is due to the natural tendency of particles to move from an area of higher concentration to an area of lower concentration, a process driven by diffusion.
The other processes mentioned are not spontaneous and require external energy to occur:
Electrolysis of water into oxygen and hydrogen: This is a nonspontaneous process which requires an external electric current to drive the decomposition of water.Separation of sodium and chlorine from sodium chloride: This also requires considerable energy input, typically through electrolysis.Removal of iron fillings from a mixture using a magnet: While the action of using a magnet is simple, it requires an external intervention to perform the separation.when 32.4 g of water vapor condenses, how much heat is given off? The heat of vaporization for water is 40.67 kj/mol
Solve if an element has a charge of 2+, how many more protons does it have than electrons? protons
Final answer:
An element with a 2+ charge has two more protons than electrons, as protons have a positive charge of +1 each.
Explanation:
If an element has a charge of 2+, it means that the element has two more protons than electrons. Since protons carry a positive charge of +1, a 2+ charge indicates that the number of protons exceeds the number of electrons by two. For example, calcium has an atomic number of 20, meaning it has 20 protons. As a Ca2+ ion, it would have 18 electrons, as it would have lost two electrons to acquire the 2+ charge.
A chemical bond that forms when atoms share electrons is always a(n) _________________________.
How many more electrons can fit within the valence shell of a oxygen atom?
An oxygen atom can accommodate 2 more electrons in its valence shell by forming two single bonds or one double bond to satisfy the octet rule.
The question concerning the number of additional electrons that can fit within the valence shell of an oxygen atom relates to its electron configuration and bonding capabilities. An oxygen atom typically has 6 electrons in its valence shell. To satisfy the octet rule, an oxygen atom requires 2 more electrons to complete its outermost shell. Oxygen achieves this by forming two single bonds with other atoms or one double bond, sharing electrons to fill the valence shell and reach a stable configuration with 8 electrons.
Oxygen, being in group 6 of the periodic table, has a valence electron count of 6 (electronic configuration: 2s²2p⁴). This means that the atom has two electrons that can pair up with electrons from other atoms, giving oxygen a valency of 2. By forming bonds, oxygen can have a filled valence shell with a total of 8 electrons, achieving the stable octet configuration.
Describe how water can be a liquid at room temperature but neither of its elements are liquid at room temperature
The ground-state configuration of fluorine is ________.
How many grams of naoh are needed to make 750 ml of a 2.5 (w/v) solution?
To make a 2.5 w/v solution of NaOH, you will need 2.5 grams of NaOH for every 100 mL of solution. Solving for 750 mL, you would need 18.75 grams of NaOH.
Explanation:The question refers to a w/v (weight/volume) concentration. This concentration is defined as the amount of solute (in this case, NaOH) in grams that is present in 100 mL of solution.To make a 2.5 w/v solution of NaOH, you will need 2.5 grams of NaOH for every 100 mL of solution.
First, let's set up a ratio to find out how many grams of NaOH are needed for 750 mL of solution:
(2.5 g NaOH / 100 mL solution) = (x g NaOH / 750 mL solution)
Cross-multiply to solve for x:
x = (2.5 g NaOH * 750 mL solution) / 100 mL solution = 18.75 g NaOH
So, you would need 18.75 grams of NaOH to make 750 mL of a 2.5 w/v NaOH solution.
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Their respective charges are what for electrons neutrons and protons
Electrons are negatively charged
Neutrons are neutrally charged
Protons are positively charged
What are the two categories of chemical sedimentary rock?
Thermal energy will transfer from object A to object B if:
A. The motions of the molecules in object B are faster than those of object A.
B. The temperature of object A is higher than that of object B.
C. The average kinetic energy of the molecules in object A is lower than object B.
D. Object B is hotter than object A.
I think it's B? Please help.
Answer:
B. The temperature of object A is higher than that of object B.
Explanation:
Thermal energy always transfers from hotter object to colder one. Temperature indicates the hotness and coldness of a body. In a hotter body, molecules move faster and thus, their average kinetic energy would be greater.
If thermal energy will transfer from object A to object B, then the temperature of object A would be higher than that of object B. Also, its molecules would move faster and would have greater average kinetic energy.
What is the [H3O+] of a solution with a pH of 2.56? 2.56 M, 2.75 x 10-3 M, 363 M, or -0.408 M
Answer:
The concentration of hydronium ions in solution is [tex]2.75\times 10^{-3} M[/tex].
Explanation:
The pH of the solution is defined as negative logarithm of hydronium ions concentration in a solution. Mathematically written as:
[tex]pH=-\log[H_3O^+][/tex]
Given, the pH of the solution = 2.56
[tex]2.56=-\log[H_3O^+][/tex]
[tex][H_3O^+]=0.002754 M=2.75\times 10^{-3} M[/tex]
The concentration of hydronium ions in solution is [tex]2.75\times 10^{-3} M[/tex].