we have been given the [OH⁻] therefore we can first find the pOH value
pOH scale is used to determine the basicity of a solution
pOH = - log [OH⁻]
pOH = - log (1 x 10⁻¹¹ M)
pOH = 11
after knowing the pOH we can calculate pH using following equation
pH + pOH = 14
since pOH = 11
pH = 14 - 11
pH = 3
pH scale is used to determine how acidic a solution is
once pH is known we can can calculate Hydrogen ion concentration
pH = - log [H⁺]
[H⁺] = antilog (-pH)
[H⁺] = antilog(-3)
[H⁺] = 1 x 10⁻³ M
if pH is less than 7 - solution is acidic
pH = 7 the solution is neutral
pH more than 7 - solution is basic
pH of solution is 3 which is less than 7
therefore solution is acidic
and hydrogen ion concentration is 1 x 10⁻³ M
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?
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.
You mix sugar in water and stir until it's completely dissolved. in this system, the water is the ________, the sugar is the ________, and the end result is a ________. solute; solution; solvent solvent; solution; solute solution; solvent; solute solvent; solute; solution solute; solvent; solution
Answer: water is the solvet, sugar is the solute and the the end result is a solution.
Explanation:
Binary Solution is a homogeneous mixture of two components called as solute and solvent.
Solute is the component which is present in smaller proportion and is solid for solid in liquid solution and solvent is the component which is present in larger proportion and is liquid for solid in liquid solution.
Concentrated solution is one in which there is more amount of solid.
Dilute solution is one in which there is more amount of liquid.
Thus as sugar is lesser in amount , it is the solute. Water is preset in larger amount, thus it is the solvent and the end result is the solution.
What might cause the percent yield of sodium chloride to be less than 100%? How about when it is more than 100%? o.o
Why are graphs used to understand an objects motion?
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
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.
What could you make by chopping a copper wire into small pieces?
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
6.0 g of copper was heated from 20 degree c to 90 degree c . How much energy was used to heat cu?
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
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).
Learn more about Acid-Base Reactions here:https://brainly.com/question/15209937
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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]]
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.
Identify the solute with the lowest van't hoff factor.
Which of the following could you do to increase the strength of an electromagnet? decrease the number of windings decrease the electric current change the core from wood to iron all of the above
Answer:
to change the core
Explanation:
In the reaction below, hydrogen peroxide decomposes to water. MM H2O2 = 34.02 g/mol MM H2O = 18.02 g/mol MM O2 = 32 g/mol 2H2O2 → 2H2O + O2 If 14.3 moles of H2O2 is decomposed, how many grams of oxygen gas are produced? Show ALL your work to get full credit.
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.
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.
Learn more about nonmetals on https://brainly.com/question/16749127
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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.
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:
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.
10,300 milliliters is the same as: cm3 and L
Answer : The 10300 milliliter in [tex]cm^3[/tex] and L are, [tex]10300 cm^3[/tex] and 10.3 L respectively.
Explanation :
The conversion used from milliliters to centimeter cube is:
[tex]1ml=1cm^3[/tex]
As we are given the volume 10300 ml. Now we have to determine the volume in centimeter cube.
As, [tex]1ml=1cm^3[/tex]
So, [tex]10300ml=\frac{10300ml}{1ml}\times 1cm^3=10300cm^3[/tex]
The volume in centimeter cube is, [tex]10300cm^3[/tex]
The conversion used from milliliters to liter is:
1 ml = 0.001 L
As we are given the volume 10300 ml. Now we have to determine the volume in liter.
As, 1 ml volume = 0.001 L
So, 10300 ml volume = [tex]\frac{10300ml}{1ml}\times 0.001L=10.3L[/tex]
The volume in liter is, 10.3 L
Answer:
The 10300 milliliter in and L are, and 10.3 L respectively.
Explanation:
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
What is the approximate total number of atoms in a 1.0 mole of lithium?
Answer:
6.0 × 10^23
Explanation:
Big brain mode
#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.
In the correctly balanced equation, what are the coefficients for H2, Cl2, and HCl (respectively)? ___H2 + ___Cl2 → ___HCl 1,1,1 2,2,1 1,1,2 2,1,2
The correctly balanced equation for the reaction between hydrogen (H2) and chlorine (Cl2) to form hydrogen chloride (HCl) is H2 + Cl2 → 2 HCl, with the coefficients being 1 for H2, 1 for Cl2, and 2 for HCl.
Explanation:The question concerns balancing a chemical equation, which falls under the field of Chemistry, specifically with relation to stoichiometry, the part of chemistry that concerns the quantities of substances that come into play during chemical reactions.
In the chemical equation H2 + Cl2 → HCl, to balance it, you need to ensure that the number of atoms of each element is equal on both the reactant and product sides. After balancing the equation, it takes the form H2 + Cl2 → 2 HCl. This means that the coefficients for hydrogen (H2), chlorine (Cl2), and hydrogen chloride (HCl) are 1, 1, and 2 respectively.
Final answer:
To balance the equation between hydrogen gas (H₂) and chlorine gas (Cl₂) forming hydrogen chloride (HCl), we add a coefficient of 2 in front of HCl. This yields a balanced chemical equation where the coefficients for H₂, Cl₂, and HCl are 1, 1, and 2, respectively.
Explanation:
The equation given is a combination of hydrogen gas (H₂) and chlorine gas (Cl₂) to form hydrogen chloride (HCl). To balance the equation, we should have equal numbers of each type of atom on both sides of the equation. We start with hydrogen and chlorine atoms, and then balance the number of hydrogen chloride molecules produced.
Initially, we have the equation:
H₂ + Cl₂ → HCl
This is not balanced because we have 2 hydrogen atoms on the left and only 1 on the right; similarly, we have 2 chlorine atoms on the left but only 1 on the right. By placing a coefficient of 2 in front of HCl, which indicates we are producing 2 molecules of it, the equation becomes:
H₂ + Cl₂ → 2 HCl
Now, with two atoms of both hydrogen and chlorine on each side of the equation, the chemical equation is balanced. Therefore, the correct coefficients are 1 for H₂, 1 for Cl₂, and 2 for HCl, respectively.
how many moles of co2 are produced from 1.0 mol butane c4h10
A compound containing sodium, chlorine, and oxygen is 25.42% sodium by mass. A 3.25 g sample gives 4.33×1022 atoms of oxygen. What is the empirical formula?
The empirical formula of the compound containing sodium, chlorine, and oxygen is 25.42% sodium by mass. A 3.25 g sample gives 4.33×10²² atoms of oxygen is NaClO₂.
Step 1: Calculate the mass of sodium in the sample
Mass of sample: 3.25 gPercentage of sodium: 25.42%Mass of sodium: 3.25 g × 0.2542 = 0.827 gStep 2: Calculate the number of moles of sodium
Molar mass of sodium: 22.98 g/molNumber of moles of sodium: 0.827 g ÷ 22.98 g/mol = 0.0360 molStep 3: Calculate the number of moles of oxygen
Number of oxygen atoms: 4.33 × 10²² atomsAvogadro's number: 6.022 × 10²³ atoms/molNumber of moles of oxygen: 4.33 × 10²² atoms ÷ 6.022 × 10²³ atoms/mol = 0.0720 molStep 4: Calculate the mole ratio of sodium to oxygen
Mole ratio: Na:O = 0.0360 mol : 0.0720 mol = 1:2Step 5: Calculate the mass of chlorine in the sample
Mass of sample: 3.25 gMass of sodium: 0.827 gMass of oxygen: 0.0720 mol × 16.00 g/mol = 1.15 gMass of chlorine: 3.25 g - 0.827 g - 1.15 g = 1.28 gStep 6: Calculate the mole ratio of chlorine to sodium
Number of moles of chlorine: 1.28 g ÷ 35.45 g/mol = 0.0361 molMole ratio: Cl:Na = 0.0361 mol : 0.0360 mol = 1:1Step 7: Write the empirical formula
The empirical formula is NaClO₂, which matches the given information.Therefore, the empirical formula of the compound is NaClO₂.
I'm a really stuck in this. I kind of suck in chemistry, please help me. I would really appreciate it.
I have to write one to two paragraphs about : What is the relationship between the atomic numbers and ionic radii of the elements in group 1?
And
What is the relationship between atomic numbers and first ionization energies?
These Are The Elements in group 1 of the periodic table:
lithium
sodium
potassium
rubidium
cesium
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