Answer:
7.9 × 10⁻⁹ M
Explanation:
Step 1: Given data
pH of the ocean: 8.1
Step 2: Calculate the concentration of hydronium ions
We will use the definition of pH.
pH = -log [H⁺] = -log [H₃O⁺]
[H₃O⁺] = [H⁺] = antilog -pH
[H₃O⁺] = antilog -8.1 = 7.9 × 10⁻⁹ M
Since [H₃O⁺] < 10⁻⁷ M, the solution is basic.
A mixture containing nitrogen, hydrogen, and iodine established the following equilibrium at 400 °C:2NH3(g) + 3I2(g) ⇌ N2(g) + 6HI(g)Use the information below to calculate Kc for this reaction.N2(g)+3H2(g)⇌2NH3(g) Kc1= 0.50 at 400CH2(g)+I2(g)⇌2HI(g Kc2= 50 at 400°C
Answer: The value of [tex]K_{c}[/tex] for this reaction is 250000.
Explanation:
The given equation is as follows.
[tex]2NH_{3}(g) + 3I_{2}(g) \rightleftharpoons N_{2}(g) + 6HI(g)[/tex]
[tex]N_{2}(g) + 3H_{2}(g) \rightleftharpoons 2NH_{3}(g); K_{c_{1}} = 0.50[/tex] ... (1)
[tex]H_{2}(g) + I_{2}(g) \rightleftharpoons 2HI(g); K_{c_{2}} = 50[/tex] ... (2)
To balance the atoms, multiply equation (2) by 3. Hence, the equation (2) can be re-written as follows.
[tex]3H_{2}(g) + 3I_{2}(g) \rightleftharpoons 6HI(g); K_{c_{2}} = (50)^{3}[/tex] ... (3)
Now, subtract equation (1) from equation (3). So, the equation formed will be as follows.
[tex]3I_{2} - N_{2} \rightleftharpoons 6HI - 2NH_{3}[/tex]
This equation can also be re-written as follows.
[tex]3I_{2} + 2NH_{3} \rightleftharpoons N_{2} + 6HI[/tex]
This equation is similar to the equilibrium equation given to us.
Therefore, during this subtraction the equation constants get divided as follows.
[tex]K^{'}_{c} = \frac{K_{c_{2}}}{K_{c_{1}}}\\= \frac{(50)^{3}}{0.50}\\= 250000[/tex]
Thus, we can conclude that the value of [tex]K_{c}[/tex] for this reaction is 250000.
Give the definition for diffusion. Group of answer choices gas molecules mix equally average distance between collisions gas molecules escape from a container into a vacuum through a small hole gas molecules mix unequally gas molecules spread out in response to a concentration gradient Next
Answer:
gas molecules spread out in response to a concentration gradient.
Explanation:
Diffusion can be defined as the movement of gas molecules from a region of high concentration to a region of lower concentration until an equilibrium is attained or reached. This mixing of gas molecules in the liquid or gaseous state is due to their kinetic energy of random motion i.e without requiring bulk motion.
This ultimately implies that, diffusion is a phenomenon through which gas molecules in either a gaseous or liquid state spread out in response to a concentration gradient, which is simply the difference in concentration of the gases across a space.
In conclusion, increasing the surface area of a gas increases its collision rate and it's considered to be an evolutionary strategy that maximizes the diffusion of gas molecules by catalysing the rate of a gaseous reaction.
A 0.2264 g sample of a pure carbonate, XnCO3(s) , was dissolved in 50.0 mL of 0.1800 M HCl(aq) . The excess HCl(aq) was back titrated with 24.90 mL of 0.0980 M NaOH(aq) . How many moles of HCl react with the carbonate
Answer:
6.56x10⁻³ mol
Explanation:
First we calculate how many HCl moles are there in 50.0 mL of a 0.1800 M solution:
0.1800 M * 50.0 mL = 9.00 mmol HClThen we need to calculate how many HCl moles were in excess, that number is the same as the number of NaOH moles they reacted with:
0.0980 M * 24.90 mL = 2.44 mmol NaOH = 2.44 mmol HClFinally we calculate the difference between the original number of HCl moles and the number remaining after the reaction with XnCO₃:
9.00 mmol - 2.44 mmol = 6.56 mmol6.56 mmol / 1000 = 6.56x10⁻³ molhow do I name cycloalkanes?
Answer:
[tex]{ \tt{aromatic \: alkanes}} \\ \\ { \underline{ \blue{ \tt{becker⚜jnr}}}}[/tex]
1. Determine the number of sides of the cyclic compound.
2. Use IUPAC theory, determine the functional group and its position.
Metallic Bond
When nitrogen shares electrons with oxygen, what kind of bond is made?
Answer: covalent bonds
Explanation:
The solubility of CaSO4 in pure water at 0oC is 1.09 gram(s) per liter. The value of the solubility product is g
Answer: See image attached!
Good luck with your future exams!
The value of the solubility of product for CaSO₄ in pure water at 0 °C is 1.1881
What is solubility of product?The solubility of product (Ksp) is defined as the concentration of products raised to their coefficient coefficients. This is illustrated below:
mA <=> nC + eD
Ksp = [C]^n × [D]^e
With the above information in mind, we can obtain the solubility of the product. This is illustrated below:
Dissociation equationCaSO₄(aq) → Ca²⁺(aq) + SO₄²⁻(aq)
From the balanced equation above,
1 mole of CaSO₄ contains 1 mole of Ca²⁺ and 1 mole of SO₄²⁻
How to determine the concentration of Ca²⁺ and SO₄²⁻From the balanced equation above,
1 mole of CaSO₄ contains 1 mole of Ca²⁺ and 1 mole of SO₄²⁻
Therefore,
1.09 g/L of CaSO₄ will also contain
1.09 g/L of Ca²⁺1.09 g/L of SO₄²⁻ How to determine the solubility of product Concentration of Ca²⁺ = 1.09 g/L Concentration of SO₄²⁻ = 1.09 g/L Solubility of product (Ksp) =?CaSO₄(aq) → Ca²⁺(aq) + SO₄²⁻(aq)
Ksp = [Ca²⁺] × [SO₄²⁻]
Ksp = 1.09 × 1.09
Ksp = 1.1881
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he specific heat capacity of a pure substance can be found by dividing the heat needed to change the temperature of a sample of the substance by the mass of the sample and by the change in temperature. The heat capacity of a certain substance has been measured to be
Complete question is;
The specific heat capacity of a pure substance can be found by dividing the heat needed to change the temperature of a sample of the substance by the mass of the sample and by the change in temperature. The specific heat capacity of a certain substance has been measured to be 3.52 J/g°C. Suppose 420.0 g of the substance is heated until the temperature of the sample has changed by 43.8 °C.
Write an equation that will let you calculate the last Q that was needed for this temperature change. Your equation should contain only symbols. Be sure to define each symbol.
Answer:
Q = m•c•Δt
Q = 64753.92 J
Explanation:
We are given;
Mass (m) = 420 g
Change in temperature; (Δt) = 43.8 °C
Specific heat capacity (c) = 3.52 J/g °C
The last Q is simply the heat energy that caused that temperature change.
This is given by the formula;
Q = m•c•Δt
Plugging in the relevant values;
Q = 420 × 3.52 × 43.8
Q = 64753.92 J
Draw the structure of the major organic product isolated from the reaction of 3-hexyne with hydrogen (1 mol), Lindlar palladium.
Answer:
See explanation and image attached
Explanation:
When 1 mole of hydrogen is added to 3-hexyne, the addition occurs on the same face or side of the triple bond to yield cis-2-hexene in the presence of lindlar catalyst which prevents further hydrogenation. This is known as syn addition.
The syn addition is achieved because the hydrogen molecule is first adsorbed on the surface of the palladium metal and is subsequently attached to the same face of the triple bond in 3-hexyne as shown in the image attached to this answer.
34. Which type of reaction is represented by the
equation?
CH. + Biz - CH.Br + HB,
A suhstitution
C. esterification
D. polymerization
Answer:
Option A. Substitution
Explanation:
To know which option is correct, let us define each option. This is illustrated below:
A substitution reaction is a reaction in which an halogen replaces hydrogen in a hydrocarbon to produce alkyl halide and the corresponding acid. For example:
RH + X₂ –> RX + HX
NOTE:
R => is an alkyl group
X => is an halogen (F₂, Cl₂, Br₂ or I₂)
Addition reaction is a reaction in which two reactants combined to form a new compound without any loss of the reactants. This reaction is peculiar to only unsaturated hydrocarbon. For example:
CₓHᵧ + A₂ —> ACₓHᵧA
NOTE:
CₓHᵧ => unsaturated hydrocarbon (alkene, alkyne)
A₂ => halogen (F₂, Cl₂, Br₂ or I₂) or HBr, HCl etc
Esterification is a reaction involving carbonxylic and alcohol to produce ester and water. For example:
RCOOH + HOR —> RCOOR + H₂O
NOTE:
R => is an alkyl group
Polymerization is a process of reacting smaller molecules called monomers to form a larger molecule called polymer.
With the information provided above, we can see that the reaction:
CH₄ + Br₂ —> CH₃Br + HBr
Is a substitution reaction since Br replaces H in CH₄ to produce CH₃Br and the corresponding acid i.e HBr
Helppppp
What is the mass of 4.09 x 10^22 molecules of oxygen gas?
1.09 grams
7.69 x 1044 grams
2.17 grams
0.0679 gram
Answer:
[tex]2.17gO_2[/tex]
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to calculate the mass of 4.09 x 10^22 molecules of oxygen gas by firstly keeping in mind that that 1 mole of it has a mass of 32.0 g and secondly that 1 mole of any substance contains 6.022x10^23 representative units, in this case, molecules of O2, and thus, the appropriate setup to perform this conversion is shown below:
[tex]4.09x10^{22}molecules \ O_2*\frac{1molO_2}{6.022x10^{23}molecules \ O_2}*\frac{32.0gO_2}{1molO_2} \\\\2.17gO_2[/tex]
Regards!
What’s the correct answer
Answer:
I think it's 2-methylhept-2-ene
Explanation:
Hope this will help and correct me if I'm wrong.
Write the reaction of maleic acid with Br2
If a light beam strikes a shiny object at a 90-degree angle, to what are the angle of incidence and the angle of reflection equal?
Answer:
Angle of incidence = angle of reflection = 0
Explanation:
Given that,
A light beam strikes a shiny object at a 90-degree angle.
The angle made by incident ray and normal to the mirror is called the angle of incidence and the angle made by the reflected ray and the normal is called the angle of reflection.
Here, the beam strikes normally. So, the angle of incidence is 0.
A/c to the law of reflection,
Angle of incidence = angle of reflection
So, the angle of reflection is also equal to 0.
How many liters of water would you need to add to 4.36 moles of NaCl to create a 9.4 M solution?
Answer:
0.464 L
Explanation:
Molarity (M) = number moles (n) ÷ volume (V)
According to the information given in this question:
number of moles (n) = 4.36 moles
Molarity = 9.4M
Volume = ?
Using M = n/V
9.4 = 4.36/V
9.4V = 4.36
V = 4.36/9.4
V = 0.464 L
Hence, 0.464L of water are needed the volume of water.
what happens to the volume of a gas if the pressure and temperature doubled
Hi there! Answer is below :)
Explanation:
For this question, we apply Boyle's Law and Charles' Law.
When you double the amount of pressure and temperature of a compound or mixture, the volume will decrease by a half. So, if the pressure and temperature are 2, and the volume is 1, and you double, your volume will be 0.5 and your pressure and temperature will be 4.
Best of Luck!
Which type of macromolecule carries genetic information from parents to
their children?
A. Nucleic acids
B. Carbohydrates
C. Proteins
D. Lipids
Answer: Its A nucleic acids
Explanation:
Nucleic acids, and DNA in particular, are key macromolecules for the continuity of life. DNA bears the hereditary information that's passed on from parents to children, providing instructions for how (and when) to make the many proteins needed to build and maintain functioning cells, tissues, and organisms.
Nucleic acids carry genetic information from parents to their children.
What are Nucleic acids?Nucleic acids are biopolymers, macromolecules, essential to all known forms of life.[1] They are composed of nucleotides, which are the monomers made of three components: a 5-carbon sugar, a phosphate group and a nitrogenous base. The two main classes of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). If the sugar is ribose, the polymer is RNA; if the sugar is the ribose derivative deoxyribose, the polymer is DNA.
Nucleic acids are naturally occurring chemical compounds that serve as the primary information-carrying molecules in cells and make up the genetic material. Nucleic acids are found in abundance in all living things, where they create, encode, and then store information of every living cell of every life-form on Earth. In turn, they function to transmit and express that information inside and outside the cell nucleus to the interior operations of the cell and ultimately to the next generation of each living organism. The encoded information is contained and conveyed via the nucleic acid sequence, which provides the 'ladder-step' ordering of nucleotides within the molecules of RNA and DNA. They play an especially important role in directing protein synthesis.
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If 12.5 grams of Hydrogen and 5.14 grams of Oxygen react in a container what would be the excess leftovers? Thanks! :)
Answer:
Explanation:
The reaction is 2H2 + O2 -> 2 H2O
So the molar ratio of H2 and O2 is 2:1
No. of moles of H2 = 12.5/2 = 6.25
No. of moles of O2 = 5.14/32 =0.16
As 6.25 > 0.16*2 = 0.32
there will be H2 leftovers of 6.25-0.32 = 5.93 moles or 11.86 grams
Answer:
Explanation:
2 H2 + 1 O2 => 2 H2O
molecular wt of H2 = 2
molecular wt of O2 = 32
so wt of H2 : wt of O2 = 2x2 : 16 = 4 : 16 = 1 : 4
there are way more H2 as 12.5 > 5.14/4 = 1.285
H2 leftovers = 12.5 - 1.285 = 11.215 gram
HCl(aq) and KOH(aq) Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
Answer:
HCl(aq) + KOH(aq)---------->KCl (aq)+ H2O(l)
respiration of rabbit
Answer:
A rabbits respiration should be 30-60 breaths per minute
Suppose 0.879 g of ammonia reacts with 28.5 mL of a hypobromite solution. Calculate the concentration of the hypobromite solution.
Answer:
0.877 M
Explanation:
Number of moles of ammonia = 0.879 g /17 g/mol = 0.05 moles
The reaction equation is ;
2NH3 + OBr-→ N2H4 + Br- + H2O
2 moles of NH3 reacts with 1 mole of hypobromite
0.05 moles of NH3 reacts with 0.05 moles ×1 mole/2 moles
= 0.025 moles
Number of moles = concentration × volume
Concentration = Number of moles / volume
Concentration = 0.025 moles × 1000/28.5
Concentration = 0.877 M
help pls I'll give you briliantest by tomorrow 11:59pm pls no links
Answer:
It's sunset because the sun sets in the west and rises in the east. The shadow is going west therefore the sun must be in the east. Also the shadow is super long meaning the sun has to be close to the horizon.
Explanation:
At about what age does basal metabolic rate begin to gradually decrease?
15
25
30
45
Answer:
at age 15 the BMR begin to gradually decrease
True or False: There are more genes on
Earth today than ever before.
Answer:
true
Explanation:
because scientist are discovering new things everyday.
Answer:đúng nhé người ae
Explanation:
Calculate the pKa of hypochlorous acid (HClO, a weak acid). A 0.015 M solution of hypochlorous acid has a pH of 4.64.
Answer:
"7.46" is the correct answer.
Explanation:
Given that:
[tex]pH=4.64[/tex]
[tex]C=0.015 \ M[/tex]
The equation:
⇒ [tex]HA \rightleftharpoons H^++A^-[/tex]
HA = C - Cα
H⁺ = Cα
A⁻ = Cα
now,
⇒ [tex]pH=-log(H^+)[/tex]
[tex]=-log(C \alpha)[/tex]
[tex]=4.64[/tex]
[tex]C \alpha = 2.3\times 10^-5 \ M[/tex]
As we know,
⇒ [tex]K_a=C \alpha^2[/tex]
[tex]=(\frac{C \alpha}{C} )^2\times C[/tex]
[tex]=\frac{(2.3\times 10^{-5})^2}{0.015}[/tex]
[tex]=3.5\times 10^{-8}[/tex]
hence,
⇒ [tex]pK_a=-log(K_a)[/tex]
[tex]=7.46[/tex]
pls help !!!!!!!!!!!!!!!!
Answer:
Definitely A.
Explanation:
very hot...................
A fungicide was used to kill the mushrooms in a
lawn. Some mushrooms were not affected by the
fungicide. The resistant mushrooms reproduced.
The resistance of some of the mushrooms to the
fungicide was
Answer: a
Explanation:
The ideal gas law is PV = nRT.
Use 8.31 for R. (8.31 Lx kPa / Kx mol)
What is the temperature of 3.0 moles of a gas that is in a closed container of
volume 9L, and has a pressure of 85kPa?
1. 3.4 kelvin
2. 0.03 kelvin
3. 30.7 kelvin
4. 28.6 kelvin
Answer: 30.66945 kelvin
Explanation:
What happens to the Cl atom when it becomes part of a stable molecule NaCl?
Answer:
It looses an electron
Explanation:
We must remember that sodium chloride is an ionic compound. In an ionic compound, a metal is often bonded to a non metal.
The metal looses electron(s) and the nonmetal accepts electron(s). The metal forms its cation while the non metal forms its anion.
Thus an ionic compound is basically a pair of ions held by electrostatic interaction.
Thus, when chlorine becomes part of sodium chloride, it gains one electron from sodium and becomes Cl^-
Rank the following four isomeric hydrocarbons in order of increasing stability: - cis-1,4-Dimethylcyclohexane - 1-Cyclopropylpentane - Ethylcyclohexane - cis-1-Ethyl-2-propylcyclopropane
Answer:
cis-1-Ethyl-2-propylcyclopropane <1-Cyclopropylpentane <cis-1,4-Dimethylcyclohexane <Ethylcyclohexane
Explanation:
The least is the number of additives especially at the position 1,4 of the cyclohexane, the more is the stability.
Hence, the correct order of increasing stability is
cis-1-Ethyl-2-propylcyclopropane <1-Cyclopropylpentane <cis-1,4-Dimethylcyclohexane <Ethylcyclohexane
write any 5 great scientist name
Albert Einstein
Marie Curie
Isaac Newton
Charles Darwin
Nikola Tesla
Galileo Galilei
Ada Lovelace
Please mark me brainliest!
Albert Einstein Charles Darwin Robert Hooke Issac Newton
Galileo Galilei
