Answer:
0.501 M
Explanation:
KHP + NaOH → NaKP + H₂OFirst we convert 1.513 g of KHP into moles, using its molar mass:
1.513 g ÷ 204.22 g/mol = 7.41x10⁻³ mol = 7.41 mmolAs 1 mol of KHP reacts with 1 mol of NaOH, in 14.8 mL of the NaOH solution there were 7.41 mmoles of NaOH.
With the above information in mind we can calculate the molarity of the NaOH solution:
7.41 mmol / 14.8 mL = 0.501 MWhat are the chemical elements in iced tea?
Explanation:
I hope you interested about the chemical what they add in tea
Which of the following describes the products of a chemical reaction?
A. The atoms that make up the compounds
B. The substances that are formed
O C. The starting substances
D. The substances that are not changed during the reaction
Answer:
B. The substances that are formed
Explanation:
a chemical reaction is a reaction that there's a formation of a new compound or substance.
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HELP PLEASE!!!!!
Can someone please help me I should submit it today and the answer should be as paragraph
Answer:
National fire protection Association
Explanation:
the nfpa is a global self funded nonprofit orgnazation establised in 1896 devoted to eliminating death injury protery loss and ecomomic loss due to fire and electrical hazards
Which technique would you choose for producing a polymer acrylonitrile
(a) cationic
(b) anionic
Answer:
A
Explanation:
Which technique would you choose for producing a polymer acrylonitrile.
A
2Al + 6HCl → 2AlCl3 + 3H2
If 85.0 grams of HCl react, how many moles of H2 are produced?
Answer:
1.17 mol
Explanation:
Step 1: Write the balanced equation
2 Al + 6 HCl → 2 AlCl₃ + 3 H₂
Step 2: Calculate the moles corresponding to 85.0 g of HCl
The molar mass of HCl is 36.46 g/mol.
85.0 g × 1 mol/36.46 g = 2.33 mol
Step 3: Calculate the number of moles of H₂ produced from 2.33 moles of HCl
The molar ratio of HCl to H₂ is 6:3.
2.33 mol HCl × 3 mol H₂/6 mol H₂ = 1.17 mol H₂
Write balanced equations and solubility product expressions for the following compounds
a. CuBr
b. ZnC2O4
c. Ag2CrO4
d. Hg2Cl2
e. AlCl3
f. Mn3(PO4)3
Explanation:
Solubility product is defined as the product of the concentrations or solubilities of the ions each raised to the power their stoichiometric coefficients present in the solution. It is expressed as [tex]K_{sp}[/tex].
(a): CuBr
The chemical equation for the dissociation of CuBr into its ions follows:
[tex]CuBr\rightleftharpoons Cu^++Br^-[/tex]
The expression of [tex]K_{sp}[/tex] for CuBr follows:
[tex]K_{sp}=[Cu^+][Br^-][/tex]
(b): [tex]ZnC_2O_4[/tex]
The chemical equation for the dissociation of [tex]ZnC_2O_4[/tex] into its ions follows:
[tex]ZnC_2O_4\rightleftharpoons Zn^{2+}+C_2O_4^{2-}[/tex]
The expression of [tex]K_{sp}[/tex] for [tex]ZnC_2O_4[/tex] follows:
[tex]K_{sp}=[Zn^{2+}][C_2O_4^{2-}][/tex]
(c): [tex]Ag_2CrO_4[/tex]
The chemical equation for the dissociation of [tex]Ag_2CrO_4[/tex] into its ions follows:
[tex]Ag_2CrO_4\rightleftharpoons 2Ag^{+}+CrO_4^{2-}[/tex]
The expression of [tex]K_{sp}[/tex] for [tex]Ag_2CrO_4[/tex] follows:
[tex]K_{sp}=[Ag^{+}]^2[CrO_4^{2-}][/tex]
(d): [tex]ZnC_2O_4[/tex]
The chemical equation for the dissociation of [tex]Hg_2Cl_2[/tex] into its ions follows:
[tex]Hg_2Cl_2\rightleftharpoons 2Hg^{+}+2Cl^{-}[/tex]
The expression of [tex]K_{sp}[/tex] for [tex]Hg_2Cl_2[/tex] follows:
[tex]K_{sp}=[Hg^{+}]^2[Cl^{-}]^2[/tex]
(e): [tex]AlCl_3[/tex]
The chemical equation for the dissociation of [tex]AlCl_3[/tex] into its ions follows:
[tex]AlCl_3\rightleftharpoons Al^{3+}+3Cl^{-}[/tex]
The expression of [tex]K_{sp}[/tex] for [tex]AlCl_3[/tex] follows:
[tex]K_{sp}=[Al^{3+}][Cl^{-}]^3[/tex]
(f): [tex]ZnC_2O_4[/tex]
The chemical equation for the dissociation of [tex]Mn_3(PO_4)_2[/tex] into its ions follows:
[tex]Mn_3(PO_4)_2\rightleftharpoons 3Mn^{2+}+2PO_4^{3-}[/tex]
The expression of [tex]K_{sp}[/tex] for [tex]Mn_3(PO_4)_2[/tex] follows:
[tex]K_{sp}=[Mn^{2+}]^3[PO_4^{3-}]^2[/tex]
Given a 0.200 M solution of anserine at its isoelectric point and ready access to 0.100 M HCl, 0.100 M NaOH and distilled water, describe the preparation of 1 L of 0.0400 M anserine buffered solution, pH 7.20.
Solution :
Given :
Amount of anserine solution = 0.200 M
pH value is = 7.20
Preparation of 0.04 M solution of anserine from the 0.2 M solution.
0.2 M x [tex]x[/tex] = 0.04 M x 1000 ml
[tex]x[/tex] = 200 ml
So the 200 ml of 0.2 M anserine solution is required to prepare0.04 M of anserine.
0.1 M x [tex]x[/tex] = 0.04 x 1000 ml
[tex]x[/tex] = 400 ml
Therefore, 400 ml of HCl is needed.
How much energy would it take to freeze 12.5 g of water?
The amount of energy needed to freeze 12.5 grams of water into ice is equals to 14.295 kilo joules.
How do we calculate energy?Energy required to freeze water will be calculated by using the following equation as:
Q = mcT, where
m = mass of water = 12.5g = 0.0125kg
c = specific heat of water = 4.187 kJ/kg.K
T = temperature to freeze = 0 degree C = 273.15 K
On putting values we get,
Q = (0.0125)(4.187)(273.15)
Q = 14.295 kJ
Hence required amount of energy is 14.295 kJ.
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Density is the ratio of a sample's mass to its volume. A bar of lead has a mass of 115.2 g. When it is submerged in 25.0 mL of water in a graduated cylinder, the water level rises to 35.5 mL. What is the density of the lead
Answer:
[tex]$10.97 \ g/cm^3$[/tex]
Explanation:
Given :
Mass of a bar of lead = 115.2 g
Initial water level [tex]$\text{in the graduated cylinder}$[/tex] = 25 mL
Final water level [tex]$\text{in the graduated cylinder}$[/tex] = 35.5 mL
Difference in the water level = 35.5 - 25
= 10.5 mL
= [tex]10.5 \ cm^3[/tex]
We know that when a body is submerged in water, it displaces its own volume of water.
Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL = [tex]10.5 \ cm^3[/tex]
We know that mathematically, density is the ratio of mass of body to its volume.
Density of the lead bar is given by :
[tex]$\rho =\frac{\text{mass}}{\text{volume}}$[/tex]
[tex]$\rho =\frac{\text{115.2 g}}{\text{10.5 cm}^3}$[/tex]
= [tex]$10.97 \ g/cm^3$[/tex]
Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 7.40 moles of magnesium perchlorate, Mg(ClO4)2. Express the number of moles of Mg, Cl, and O atoms numerically, separated by commas.
Answer:
Number of moles Magnesium (Mg) = 7.40 moles
Number of moles Chlorine (Cl) = 14.8 moles
Number of moles of oxygen atoms = 29.6 moles
7.40;14.8;29.6
Explanation:
Step 1: Data given
Number of moles of magnesium perchlorate, Mg(ClO4)2 = 7.40 moles
Step 2: Calculate number of moles
In 1 mol of magnesium perchlorate, Mg(ClO4)2, we have:
1 Mol Magnesium (Mg)
2 moles of Chlorine (Cl)
8 moles of oxygen (O)
This means that for 1 mol of magnesium perchlorate, Mg(ClO4)2, we have the same amount of moles Magnesium (Mg), the double amount of moles of Chlorine (Cl) and 4x the amount of moles of oxygen (O)
Number of moles Magnesium (Mg)= 1 * 7.40 moles = 7.40 moles
Number of moles Chlorine (Cl) = 2 * 7.40 moles = 14.8 moles
Number of moles of oxygen atoms = 4 * 7.40 moles = 29.6 moles
7.40;14.8;29.6
Define and explain the causes of climate change
Answer:
The primary cause of climate change is the burning of fossil fuels, such as oil and coal, which emits greenhouse gases into the atmosphere—primarily carbon dioxide. Other human activities, such as agriculture and deforestation, also contribute to the proliferation of greenhouse gases that cause climate change
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
30 POINTS! PLEASE HELP!! WILL GIVE BRAINLIEST
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Identify the number of electrons each of the following atoms needs to gain or lose to have a stable outer electron configuration:
Sulfuric acid:
Calcium nitrate:
Sucrose:
Ammonium phosphate
Answer:
Sulfuric acid (American spelling) or sulphuric acid (Commonwealth spelling), also known as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula H2SO4. It is a colorless, odorless and viscous liquid that is miscible with water.
Calcium nitrate is produced by applying nitric acid to limestone and then adding ammonia. It is known as a double salt, since it is comprised of two nutrients common in fertilizers which are high in sodium. The processed result also looks crystallized like salt.
Sucrose is common sugar. It is a disaccharide, a molecule composed of two monosaccharides: glucose and fructose. Sucrose is produced naturally in plants, from which table sugar is refined. It has the molecular formula C₁₂H₂₂O₁₁.
Explanation:
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how to find the group number of f block elements
Answer:
I hope you understand please follow me please
Some glucose produced by gluconeogenesis is stored in the body as glycogen. Order the steps of glycogen synthesis.
a. Pyrophosphatase converts PPi and water into two Pi
b. Glycogen synthase adds a glucose unit from UDP-glucose to glycogen, producing a larger glycogen molecule and UDP
c. Glvcogen synthase removes a glucose unit from a glycogen molecule producing a smaller glycogen molecule and IJDP
d. ADP-glucose pyrophosphorylase catalyzes the reaction of glucose-I -phosphate and ATP to ADP-glucose and PPi
e. UDP-glucose pyrophosphorylase catalyzes the reaction of glucose-I-phosphate and UTP to UDP-glucose and PPi
Answer:
e. UDP-glucose pyrophosphorylase catalyzes the reaction of glucose-I-phosphate and UTP to UDP-glucose and PPi
a. Pyrophosphatase converts PPi and water into two Pi
b. Glycogen synthase adds a glucose unit from UDP-glucose to glycogen, producing a larger glycogen molecule and UDP
Explanation:
Glycogen synthesis or glycogenesis is the process of synthesis of glycogen molecules from glucose molecules in living organisms. Glycogen is a polysaccharide storage form of glucose and helps to store excess glucose in the body form use when required by the body.
The synthesis of glycogen involves sugar nucleotides. Sugar nucleotides are compounds in which a sugar molecule is attached to a nucleotide through phosphate ester bond, resulting in the activation of the sugar molecule. The sugar nucleotides then are used as substrates for the polymerization of the monosaccharide sugars into disaccharides, oligosaccharides and polysaccharides.
In the synthesis of glycogen, glucose-6-phosphate from phosphorylation of free glucose by hexokinase is first isomerized to glucose-1-phosphate by phosphoglucomutase.
Glucose-1-phosphate is then converted to UDP-glucose by its reaction with UTP catalyse by UDP-glucose pyrophosphorylase. The reaction is favoured by the rapid hydrolysis of PPi produced to two molecules of inorganic phosphate by the enzyme pyrophosphatase.
Glycogen synthase then adds a glucose unit from UDP-glucose to a growing chain of glycogen, producing a larger glycogen molecule and free UDP.
30. What is the IUPAC name of the organic compound
that has the formula shown below?
H
H-C-H
H H H H
H-C-C-C-C-C-H
H H H H H
A. 1,1-dimethylbutane
B. 2-methylpentane
C. hexane
D. 4-methylpentane
Answer:
it's 4-methyl pentane
B. 2-methylpentane is the correct answer
What is IUPAC nomenclature?IUPAC nomenclature is based on naming a molecule's longest chain of carbons connected by single bonds, whether in a continuous chain or in a ring. Why other options are incorrect?As we know the molecular formula is C6H14 and hence the structure describes the 6 carbon bonded with 14 hydrogenHence Option B is correct and rest are incorrect
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A metal forms the fluoride MF3. Electrolysis of the molten fluoride by a current of 3.86 A for 16.2 minutes deposits 1.25 g of the metal. Calculate the molar mass of the metal.
Answer: The molar mass of the metal is 96.45 g/mol
Explanation:
The fluoride of the metal formed is [tex]MF_3[/tex]
The oxidation half-reaction follows:
[tex]M\rightarrow M^{3+}+3e^-[/tex]
Calculating the theoretical mass deposited by using Faraday's law, which is:
[tex]m=\frac{M\times I\times t(s)}{n\times F}[/tex] ......(1)
where,
m = actual mass deposited = 1.25 g
M = molar mass of metal = ?
I = average current = 3.86 A
t = time period in seconds = 16.2 min = 972 s (Conversion factor: 1 min = 60 sec)
n = number of electrons exchanged = [tex]3mol^{-1}[/tex]
F = Faraday's constant = 96500 C
Putting values in equation 1, we get:
[tex]1.25g=\frac{M\times 3.86A\times 972s}{3mol^{-1}\times 96500 C}\\\\M=\frac{1.25g\times 3mol^{-1}\times 96500 C}{3.86A\times 972s}\\\\M=96.45g/mol[/tex]
Hence, the molar mass of the metal is 96.45 g/mol
The molar mass of metal present in MF₃ is calculated by using faraday's law and is equal to 96.45 g/mole.
How we calculate the molar mass?Molar mass of the metal will be calculated by using the Faraday's law as:
m = (M × I × t(s)) / n × F.
Chemical reaction for the given metal will be represented as:
M → M³⁺ + 3e⁻
And according to the Faraday's law given entities are:
m = given deposited mass = 1.25 g
I = average current = 3.86 A
t = time period in seconds = 16.2 min = 972 s
n = number of electrons exchanged = 3
F = Faraday's constant = 96500 C
M = molar mass of metal = to find?
Putting all these values in the above equation and calculate for M as:
M = (1.25)(3)(96500) / (3.86)(972) = 96.45 g/mole
Hence, the molar mass of metal is 96.45 g/mole.
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Write the reaction of maleic acid with Br2
What do these layers and their fossils suggest about Earth's history?
ОА.
Lifeforms on Earth have been the same over time.
ОВ.
No lifeforms were present when these layers formed.
OC. Only one kind of lifeform lived where these layers formed.
OD
There have been changes in Earth's lifeforms over time.
This is the answer: There have been changes in Earth's life forms over time.
In what kind of orbitals do the lone-pair electrons on the singly bonded oxygen of methyl acetate reside, and are they in the same plane as the group
Answer:
Both lone pairs reside in sp3 orbitals; they are co-planar with the CH3 group.
Explanation:
In the compound, methyl acetate, the lone-pair of electrons on the singly bonded oxygen atom is accommodated in sp3 hybridized orbitals.
If we look at the compound, we will notice the both lone pair of electrons on oxygen are accommodated in sp3 orbitals which are co-planar with the CH3 group in the molecule.
PLZ Answer ASAP
I need help with this thank you if you get it right
Answer:
A) -277.6 KJ/mol
Explanation:
The enthalpy data for first equation is not given but it should be somewhere around ΔH = –1367 kJ/mol.
So, Basically you want to rearrange the given three equations to match the equation they want you to have. To get the final equation, reverse reaction first reaction (turn its value into positive), multiply second equation by 2, multiply third equation by 3 and you add em all up:
You get 1367 + (2* -393.5) + (3 * -285.8) ~ -277.6 KJ/mol
Identify the components of tourism and hospitality and discuss?
Answer: he basic components or 4'A' s of tourism are as follows:
ATTRACTION: It is the most important element & object that attract people to travel. ...
ACCESSIBILITY: It is important key factor for the development of tourism. ...
ACCOMMODATION: -It includes food & lodging facilities to the guest. ...
AMENITIES:
What are the components of tourism and hospitality?
Accommodations and.
Lodging.
Recreation and.
Entertainment.
Travel Services.
Food and Beverage Services.
Conventions and Event.
Management.
Explanation:
NOT MY WORDS! I HOPE ThIS HELPS!
Which represents the correct equilibrium constant expression for the reaction below?
Answer:
b
Explanation:
because it is products /reactants :)
8.87. Natural Weathering of Ores Iron is oxidized in a number of
chemical weathering processes. How many moles of O2 are
consumed when one mole of magnetite (Fe3O4) is converted
into hematite (Fe2O3)?
Answer:
0.25 mole of O₂.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
4Fe₃O₄ + O₂ —> 6Fe₂O₃
From the balanced equation above,
4 moles of Fe₃O₄ reacted with 1 mole of O₂.
Finally, we shall determine the number of mole of O₂ required to react with 1 mole of Fe₃O₄. This can be obtained as follow:
From the balanced equation above,
4 moles of Fe₃O₄ reacted with 1 mole of O₂.
Therefore, 1 mole of Fe₃O₄ will react with = (1/4) = 0.25 mole of O₂.
Thus, 0.25 mole of O₂ is required for the reaction.
if The difference in height of mercury in the two arms is 435 mm. What is the pressure of the nitrogen gas in kPa?
Answer:
Therefore, Pnitrogen=97.5kpa
Explanation:
100.0-2.49
=97.5
435= i don't know
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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predict the major and minor products of the reaction. name the products using systematic names. ch3ch=ch2+h2o-->h+
Answer:
major will be propan-2-ol
minor will be propan-1-ol
A balloon filled with air has a volume of 4.24 liters at 23.00°C. If the balloon is cooled at a constant pressure to 5.00°C, what is the new volume?
If a small amount of a strong base is added to buffer made up of a weak acid, HA, and the sodium salt of its conjugate base, NaA, the pH of the buffer solution does not change appreciably because:__________
a. the K, of HA is changed.
b. No reaction occurs.
c. the strong base reacts with A to give HA, which is a weak acid.
d. the strong base reacts with HA to give AOH and H'.
e. the strong base reacts with HA to give A, which is a weak base,
Answer:
e. the strong base reacts with HA to give A, which is a weak base
Explanation:
Let's consider a buffer made up of a weak acid, HA, and the sodium salt of its conjugate base, NaA. The function is a buffer system is to muffle the change in the pH when an acid or a base is added.
Let's suppose a strong base is added. Then, OH⁻ would be more available. OH⁻ ions react with the acid component of the buffer and its effect is reduced. The corresponding reaction is:
OH⁻ + HA ⇄ A⁻ + H₂O
As we can see, the strong base reacts with HA to give A, which is a weak base.
how do i convert 145.6grams of Iron sulphide into iron and sulfur