2AgNO3 + Ni2+ = Ni(NO3)2 + 2Ag+
From the reaction, it can be seen that AgNO3 and Ni2+ has following amount of substance relationshep:
n(AgNO3):n(Ni)=2:1
From the relationshep we can determinate requred moles of Ni2+:
n(AgNO3)=m/M= 15.5/169.87=0.09 moles
So, n (Ni)=n(AgNO3)/2=0.045 moles
Finaly needed mass of Ni2+ is:
m(Ni2+)=nxM=0,045x58.7=2.64g
how many moles of co2 are produced from 1.0 mol butane c4h10
#1: When you heat an air-filled, sealed can, what happens inside?
A. The collisions of air molecules against the wall of the can are weaker and less frequent.
B. The collisions of air molecules against the wall of the can are stronger and more frequent.
C. The collisions of air molecules against the wall of the can do not change.
**my answer: B
is that correct @aaronq ?
Yes, your answer is correct. Heating an air-filled, sealed can results in stronger and more frequent collisions of air molecules against the wall, leading to an increase in pressure.
When you heat an air-filled, sealed can, the collisions of air molecules against the wall of the can become stronger and more frequent. This is because as the temperature inside the can increases, the air molecules move faster and collide more energetically with the can walls. This increased movement results in a rise in pressure inside the can due to an increased number of collisions and force per collision. This concept is based on the principles of gas pressure and the kinetic molecular theory, which relate temperature, molecular speed, and pressure in a contained gas.
Gas pressure is indeed caused by collisions between gas molecules and the container walls. An increase in temperature causes the molecules to move faster, leading to more collisions with the walls, which translates into an increase in pressure. Furthermore, the concept that gas pressure can be increased by compressing a gas into a smaller volume explains why a canister feels cold when its gas is released: the surrounding air absorbs the energy from the expanding gas.
Consider the following balanced final equation. NO2 + CO mc014-1.jpg NO + CO2 Which is the correct step(s) for this reaction mechanism?
Answer b is the answer for the equation:
If we want to produce pure aluminum (Al) using AlCl3 as a reactant, what other reactants should we use?
A. Fe
B. Ni
C. Au
D. Li
WHY is there a difference between how an electrolytes and non electrolytes affect collegiative properties? Be specific.
If 23 g of sodium reacts completely with 71 g of chlorine, ______ grams of product would be expected. Round your answer to the nearest gram. what would be the answer?
If 23 g of sodium reacts completely with 71 g of chlorine, the limiting reactant is determined, and approximately 59 grams of sodium chloride (NaCl) can be produced.
1. Calculate the moles of each reactant:
Sodium: 23 g / 23 g/mol = 1 mol
Chlorine: 71 g / (2 * 35.5 g/mol) = 1 mol
2. Determine the limiting reactant:
In this case, both sodium and chlorine have the same number of moles (1 mol each). Therefore, neither is technically "limiting" the reaction. However, for calculating the theoretical yield (maximum amount of product), we need to consider that one reactant might be completely consumed before the other.
3. Calculate the grams of product based on the limiting reactant (assuming complete consumption of one reactant):
Since both reactants have the same amount, choosing either sodium or chlorine as the limiting reactant will give the same result. Let's assume sodium is completely consumed.
NaCl produced: 1 mol Na x (1 mol NaCl / 1 mol Na) x (23 g NaCl/mol + 35.5 g NaCl/mol) = 58.5 g NaCl
4. Round the answer to the nearest gram:
58.5 g rounded to the nearest gram is 59 g.
Therefore, if 23 g of sodium reacts completely with 71 g of chlorine, we can expect around 59 grams of sodium chloride (NaCl) to be produced.
If 23 g of sodium reacts with 71 g of chlorine, based on stoichiometry and the limiting reagent principle, 94 grams of sodium chloride would be the expected product, rounded to the nearest gram.
Explanation:If 23 g of sodium reacts completely with 71 g of chlorine, the amount of product formed can be determined using stoichiometry based on the balanced chemical equation 2 Na(s) + Cl2(g) → 2 NaCl(s).
Based on the molar mass of the reactants and products, we can conclude that 45.98 amu of sodium will react with 70.90 amu of chlorine to produce 275.9 amu of sodium chloride. Converting these amounts to grams, we find that every 22.99 g of sodium reacts with 35.45 g of chlorine to produce 58.45 g of sodium chloride (NaCl).
Given the ratio of sodium to chlorine to sodium chloride is 1:1.545:2.54 in terms of grams, we can calculate that 23 g of sodium will react with 35.54 g (23 g × 1.545) of chlorine to produce a total of 58.54 g (23 g × 2.54) of sodium chloride. Since the question states that we have 71 g of chlorine, sodium is the limiting reagent, and therefore the maximum yield of NaCl will be based on the amount of sodium.
Thus, if 23 g of sodium reacts completely with 71 g of chlorine, 94 grams of sodium chloride (NaCl) would be the expected rounded product to the nearest gram.
Please check this for me?
Question: When the ore lead (ii) sulfide burns in oxygen, the products are solid lead (ii) oxide and sulfur dioxide gas.
My answer: PbS (s) + O2 (g) --> PbO (s) + SO2 (g)
I wanted to know if I'm correct before I balance.
Consider the balanced equation. 2hcl + mg mgcl2 + h2 if 40.0 g of hcl react with an excess of magnesium metal, what is the theoretical yield of hydrogen? 1.11 g 2.22 g 52.2 g 104 g
The correct answer is option (A). The theoretical yield of hydrogen (H₂) is approximately 1.11 g.
To find the theoretical yield of hydrogen gas (H₂) produced in this reaction, follow these steps:
1. Determine the molar mass of HCl:
- The molar mass of HCl = 1.01 g/mol (for H) + 35.45 g/mol (for Cl) = 36.46 g/mol.
2. Calculate the number of moles of HCl in 40.0 g:
[tex]\text{moles of HCl} = \frac{40.0 \, \text{g}}{36.46 \, \text{g/mol}} = 1.095 \ moles[/tex]
3. Using the stoichiometry of the balanced equation:
For every 2 moles of HCl, 1 mole of H₂ is produced.
Therefore, moles of H₂ produced = [tex]\frac{1.095 \, \text{moles of HCl}}{2} = 0.5475 \ moles \ of \ H_2[/tex].
4. Determine the molar mass of H₂:
- The molar mass of H₂ = 2.016 g/mol.
5. Calculate the theoretical yield of H₂ in grams:
[tex]{mass\ of {H_2}} = 0.5475 \times 2.016 = 1.103824 g[/tex]
6. Round to the nearest gram: - 1.11 g
So, the theoretical yield of hydrogen gas is approximately: A) 1.11 g
The complete question is:
Consider the balanced equation. [tex]2HCl + Mg \rightarrow MgCl_2 + H_2[/tex] if 40.0 g of HCl react with an excess of magnesium metal, what is the theoretical yield of hydrogen?
A) 1.11 g
B) 2.22 g
C) 52.2 g 1
D) 104 g
PLEASEEE HELP!!!!!!
water has a Ka value of what?
1 x 10-10
1 x 10-13
1 x 10-15
1 x 10-14
Final answer:
The water has a Ka value, more precisely referred to as ionization constant (Kw), of 1.0 × 10^-14 at 25 °C.
Explanation:
The water has a Ka value that is actually known as the ionization constant for water, Kw. The Ka value is a specific term generally used for the acid dissociation constant of substances other than water. For water at 25 °C, the product of the concentrations of the hydrogen ions ([H3O+]) and the hydroxide ions ([OH-]) is 1.0 × 10^-14, so Kw is 1.0 × 10^-14. This means that in pure water, or in a neutral aqueous solution, the concentration of hydrogen ions and hydroxide ions are both 1.0 × 10^-7 M. Therefore, the correct answer to the question 'water has a Ka value of what?' is 1 × 10^-14.
Elaborate on the suitability of "cola" type drinks to polish chrome surfaces. A) The basic pH of cola allows for easy removing of oils. B) The phosphoric acid in cola easily removes dirt and grime. C) The neutral nature of cola allows it to function like water. Eliminate D) The sugar in cola makes it likely to cause the chrome to rust.
6.0 g of copper was heated from 20 degree c to 90 degree c . How much energy was used to heat cu?
Which of the following elements are nonmetals? A. lithium (Li) and barium (Ba) B. palladium (Pd) and zinc (Zn) C. nitrogen (N) and sulfur (S) D. beryllium (Be) and magnesium (Mg)
Answer:
C. Nitrogen (N) and sulfur (S)
Explanation:
Hello,
In this case, we could differentiate the nonmetals from the metals by understanding they do not have or have very tiny values of properties such as bright, hardness, electric conductivity, heat conductivity and others. Moreover, they are allocated at the right of the periodic table. In such a way, since nitrogen tends to be a gas and sulfur a yellowish powder, they are classified as nonmetals whereas, lithium, barium, palladium, zinc, beryllium and magnesium are considered as metals as they have the aforementioned properties.
Best regards.
We can see here that the nonmetals among the options provided are:
C. Nitrogen (N) and Sulfur (S)
What is nonmetal?Nonmetals are a group of elements found on the right side of the periodic table. They are characterized by their properties, which are distinct from those of metals.
Nonmetals generally have properties such as being poor conductors of heat and electricity, having lower melting and boiling points, and being more brittle compared to metals. Nitrogen and sulfur are both nonmetals, whereas the other elements listed in the options (lithium, barium, palladium, zinc, beryllium, and magnesium) are metals or metal-like elements.
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Note: Moles to grams, or grams to moles you will need to use molar mass (g/mol).
1)How many moles are in 20.2 g HCl?
2) How many grams are in 2 moles of HCl?
Note: When converting from moles to molecules, you need the following: 1 mole = 6.022 x 1023 molecules
3) How many molecules are in 23 moles of Sodium?
4) How many moles are in 8.022 x 1026 molecules of NaCl?
Note: 1 mole = 22.4 L
5) How many moles are in 5 Liters of H2 gas?
6) How many Liters are in 5 moles of H2 gas?
Multiple Conversions in one problem.
7) How many grams of HCl will be produced with 16.2 grams of H2 and excess Cl2? (H2 + Cl2 -> 2HCl)
8) How many Liters are there in 46 g of Cl2 gas?
Examine the nuclear reaction: mc007-1.jpg. Why is this classified as a nuclear reaction rather than a chemical reaction? It is not balanced. A new compound is formed. A change has occurred in a nucleus. A new element has been formed.
Answer:
B/ the second option
Explanation:
This is the answer on e2020
CAN YOU MAKE ME BRAINLIEST
Based on what you read on the Marie Curie and the Science of Radioactivity website, name the scientists who shared the Nobel Prize in Physics in 1903 and describe their contributions that were recognized by the award.
What might cause the percent yield of sodium chloride to be less than 100%? How about when it is more than 100%? o.o
Iron combines with oxygen to form rust. Given the chemical reaction, how many grams of rust would be produced if 3 grams of reactants were consumed? A) 0 grams B) 1 gram C) 3 grams D) 7 grams
Hello!
If 3 grams of reactants were consumed, then C) 3 grams of rust must be produced.
Why?There are two possible chemical reactions between iron and oxygen to form rust:
2Fe + O₂ → 2FeO (Ferrous Oxide)4Fe + 3O₂ → 2Fe₂O₃ (Ferric Oxide)These two chemical reactions obey the Law of Conservation of Matter, which states that matter is conserved in a chemical reaction.
So, if there are 3 grams of reactants initially, and they react completely, then 3 grams of rust (either Ferrous Oxide or Ferric Oxide) must be produced for the reaction to obey the Law of Conservation of Matter.
Have a nice day!
Identify which method of thermal energy transfer would be fastest through a vacuum, which would be fastest through a gas, and which would be fastest through a solid.142
The method of heat transfer that will be the fastest in vacuum is radiation, in gas is convection and in solid is conduction.
There are three modes of heat transfer, they include;
conductionconvection, andradiationThe method of heat transfer that will be the fastest in gas is convection. Heat transfer by convection involves that actual movement of the particles of the fluid. The average distance between gas molecules are large which enables fast and easy transfer of heat through the movement of the molecules.
The method of heat transfer that will be the fastest in vacuum is radiation. Heat transfer by radiation does not require material medium. Vacuum is the best medium for heat transfer by radiation.
The method of heat transfer that will be the fastest in solid is conduction. Heat transfer by conduction involves the vibration of the solid particle about their mean position.
Thus, we can conclude that the method of heat transfer that will be the fastest in vacuum is radiation, in gas is convection and in solid is conduction.
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A flask contains a gas mixture of methane, hydrogen, and nitrogen with partial pressures of 1 atm, 1.2 atm, and 1.1 atm, respectively. What is the total pressure of the mixture?
Answer:
3.3 atm
Explanation:
This is a simple application of Dalton's law of partial pressure which state that the total pressure exerted by a mixture of gas is the sum of the individual partial pressure of the component gases.
[tex]P_{total} = P_1 + P_2 + ........ + P_n[/tex]
Hence, the total pressure of the gas mixture becomes:
[tex]P_{total} = P_{methane} + P_{hydrogen} + ........ + P_{nitrogen}[/tex]
= 1 + 1.2 + 1.1
= 3.3 atm
The total pressure of the mixture is 3.3 atm
Which is true of ionic compounds? They have characteristically low melting and low boiling points. They are electrically charged, either positive or negative. They contain no charged particles. They form hard, brittle crystals with characteristic shapes.
Water is a polar solvent. Which of the following will not dissolve in water?
A. table salt
B. Olive oil
C. Vinegar
D.Surgar
1) polar solvents dissolve ionic or polar solutes
2) Non-polar solvents dissolve non-polar solutes
3) Non-polar solvents do not dissolve polar and ionic solutes
4) Polar solvents do not dissolve non-polar solutes.
There are exceptions, but the rule is applicable in here.
Write a balanced equation for the thermal dehydration barium chloride
Final answer:
The balanced equation for the thermal dehydration of barium chloride is [tex]\[ BaCl_2 \cdot 2H_2O \xrightarrow[\text{}]{\text{Heat}} BaCl_2 + 2H_2O \uparrow \][/tex]
Explanation:
The thermal dehydration of barium chloride (BaCl₂) involves the removal of water molecules from its hydrated form. Barium chloride commonly exists as a dihydrate, BaCl₂·2H₂O. The balanced chemical equation for the thermal dehydration of barium chloride dihydrate is:
[tex]\[ BaCl_2 \cdot 2H_2O \xrightarrow[\text{}]{\text{Heat}} BaCl_2 + 2H_2O \uparrow \][/tex]
In this equation, the dihydrate on the left side loses two water molecules upon heating, producing anhydrous barium chloride (BaCl₂) and releasing water vapor. The upward arrow indicates the release of water in the form of steam or water vapor.
This process is a common example of thermal decomposition reactions, where a substance breaks down into simpler components upon exposure to heat. Understanding such reactions is crucial in various chemical and industrial processes, providing insights into the behavior of compounds under specific conditions.
Conservation of Matter states that the reactants have to equal the _______. products enablers 2. Products and reactants in a balanced chemical reaction have the same number of _______ of each element. atoms molecules 3. If the equation on the board had shown 3 atoms of carbon on the reactants side, how many atoms of carbon would need to be represented on the products is
Answer:
1) Conservation of Matter states that the reactants have to equal the products.
2) Products and reactants in a balanced chemical reaction have the same number of atoms of each element.
3) Three (3) atoms of carbon would need to be represented.
Explanation:Number of atoms on the left and on the right side of the balanced chemical reaction is the same, for example: Mg + 2HCl → H₂ + MgCl₂. There are two hydrogen atoms, two chlorine atoms and one magnesium atom on both side of chemical reaction.
1. Conservation of Matter states that the reactants have to equal the products.
2. Products and reactants in a balanced chemical reaction have the same number of atoms of each element.
3. If the equation on the board had shown 3 atoms of carbon on the reactants side, then there would need to be 3 atoms of carbon on the products side.
Conservation of Matter is a law of science that states that matter cannot be created or destroyed. This means that the total mass of the reactants in a chemical reaction must equal the total mass of the products.
Atoms are the basic unit of matter. A molecule is a group of atoms that are bonded together.
In a balanced chemical equation, the number of atoms of each element is the same on the reactant side and the product side. This is because the law of conservation of matter must be obeyed.
So, if the equation on the board had shown 3 atoms of carbon on the reactants side, then there would need to be 3 atoms of carbon on the products side in order for the equation to be balanced.
Here is an example of a balanced chemical equation:
2 H₂ + O₂ → 2 H₂O
In this equation, there are 2 hydrogen atoms on the reactant side and 2 hydrogen atoms on the product side. There is also 1 oxygen atom on the reactant side and 1 oxygen atom on the product side. This is a balanced equation because the law of conservation of matter is obeyed.
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An atom has three full orbitals in its second energy level.
How many electrons are present in the second energy level of the atom?
6
12
3
9
Answer:
6 hope this helps
A student says that since the atomic theory is just a theory, it should not be considered useful. Which statement best argues against the student’s opinion?
a) scientific theories change over time
b)scientific theories are the results of many experiments and observations
c) scientists often do not agree about specific details of scientific theories
d) scientists often propose competing theories
e) scientific theories do not become scientific laws
Answer:
b
It's the only one that would oppose to the student
A reaction occurs when solid X is placed into solution Y. As a result, the temperature of the new solution increases by 3°C. The temperature rises another 2°C when more of solid X is added to the solution. What does this indicate about the effect of adding more solid? It increased the number of molecular collisions. It decreased the number of molecular collisions. It decreased the space between the molecules and lowered the reaction rate. It increased the space between the molecules and increased the reaction rate
Answer: It increased the number of molecular collisions.
Justification:
The collision theory states the reaction is the result of the collisions between the particles (atoms, ions, or molecules).
The increase of the temperature as solid is added is the result of the reaction of solid X when it is placed into the solution.
Since, the main postulate of the collision theory is that the particles have to collide to react, the amount of particles is a decisive factor of the reaction rate. The raise of the temperature when the solid is added is an evidence of this postulate: more particles → more collisions → more reactions → increase in temperature.
How many minutes make up one week?
A) 7*60^2
B) 7*24*60
C) 7*24*60^2
D) (7*24/60)
Write the balanced ka and kb reactions for hso3– in water. be sure to include the physical states of each species involved in the reaction.
The Ka and Kb reactions for the HSO3- ion in water, acting as an acid and base respectively, are: 1) Ka Reaction: HSO3-(aq) + H2O(l) → H3O+(aq) + SO3 2-(aq), 2) Kb Reaction: HSO3-(aq) + H2O(l) → OH-(aq) + H2SO3(aq).
Explanation:The HSO3- ion is amphoteric, meaning it can act as both an acid and a base. The ka and kb reactions for this ion in water would be as follows:
As an acid (Ka Reaction): HSO3-(aq) + H2O(l) → H3O+(aq) + SO3 2-(aq).As a base (Kb Reaction): HSO3-(aq) + H2O(l) → OH-(aq) + H2SO3(aq).In the Ka reaction, the bisulfite ion (HSO3-) donates a hydrogen ion (H+) to water, thereby acting as an acid. The resultant ions are hydronium (H3O+) and sulfite (SO3 2-).
In the Kb reaction, the bisulfite ion (HSO3-) accepts a hydrogen ion (H+) from water, thus acting as a base. The resulting species are hydroxide ion (OH-) and sulfurous acid (H2SO3).
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The balanced reactions for [tex]HSO_{3}^{-}[/tex]⁻ in water are [tex]HSO_{3}[/tex](aq) + H₂O(l) ⇌ [tex]SO^{2-} _{3}[/tex]⁻(aq) + H₃O⁺(aq) for its Ka, and [tex]HSO_{3} ^{-}[/tex]⁻(aq) + H₂O(l) ⇌ [tex]H_{2} SO_{3}[/tex](aq) + OH⁻(aq) for its [tex]k_{b}[/tex]. The equilibrium constant expressions for these reactions are written accordingly. This demonstrates [tex]HSO_{3} ^{-}[/tex] acting both as an acid and a base.
When (hydrogen sulfite ion) behaves as an acid in water, it donates a proton (H⁺) to form [tex]SO_{3} ^{2-}[/tex]and H₃O⁺. The balanced equation for this equilibrium reaction is:
[tex]HSO_{3} ^{2-}[/tex](aq) + H₂O(l) ⇌ [tex]SO_{3} ^{2-}[/tex](aq) + H₃O⁺(aq)
The equilibrium constant expression for this reaction ([tex]k_{a}[/tex]) can be written as:
[tex]k_{a}[/tex] = [[tex]SO_{3} ^{2-}[/tex]⁻][H₃O⁺] / [[tex]HSO_{3} ^{-}[/tex]]
When [tex]HSO_{3} ^{-}[/tex] behaves as a base, it accepts a proton (H⁺) from water to form [tex]H_{2} SO_{3}[/tex] and OH⁻. The balanced equation for this equilibrium reaction is:
[tex]HSO_{3} ^{-}[/tex](aq) + H₂O(l) ⇌ [tex]H_{2} SO_{3}[/tex] (aq) + OH⁻(aq)
The equilibrium constant expression for this reaction ([tex]k_{b}[/tex]) can be written as:
Kb = [[tex]H_{2}SO_{3}[/tex]][[tex]OH_{-}[/tex]] / [[tex]HSO_{3} ^{-}[/tex]]
What could you make by chopping a copper wire into small pieces?
considering that silicon is a metalloid, which of the following statements is true
a. silicon's ability to conduct electric current does not vary with temperatures
b. silicon does not conduct electric current under any conditions
c. silicon is a better conductor of electric current than silver is
d. silicon is a better conductor of electric current than sulfur