After one hour, the concentration of the chemical in the tank will be 4 g/L.
This is calculated by taking the initial concentration of 1500 g/L, subtracting the amount of chemical that flows into the tank (90 g/L), and subtracting the amount of chemical that flows out of the tank (60 g/L).
This results in a concentration of 1440 g/L, which is then divided by the volume of the tank (600 L) to get a final concentration of 4 g/L.
This can be calculated as follows:
1500 g/L - 90 g/L - 60 g/L = 1440 g/L
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What is the only state of matter that can be condensed? A. Solid B. Gas C. Liquid D. Plasma
The state of matter that can be condensed is the correct option is A) Solid.
The states of matter are as follows :
A. Solid
B. Gas
C. Liquid
D. Plasma
Out which the two are considered as the condensed state of the matter which are solid ad the liquid. The solid have the fixed volume and the fixed shape. The liquid have a fixed volume but do not have the fixed shape.
The condensed state of the matter is where the state in which atoms or the molecules are very close to each other. Therefore, the solid is state where the atoms or molecules are very close to each other.
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How many oxygen atoms are there in 0.20 mol of ethanoic acid, CH3COOH?
A. 1.2 x 1023
B. 2.4 x 1023
c. 3.0 x 1024
D. 6.0 x 1024
The number of the oxygen atoms are there in the 0.20 mol of the ethanoic acid, CH₃COOH is 2.4 × 10²³ atoms.
The number of the moles of the ethanoic acid = 0.20 mol
The formula of the ethanoic acid = CH₃COOH
The number of the oxygen atoms in the ethanoic acid = 2
The one mole of the substance = 6.022 × 10²³ atoms
The number of the oxygen atoms in the ethanoic acid is as :
The number of oxygen atom = 2 × 0.20 × 6.022 × 10²³ atoms
The number of the oxygen atom = 2.4 × 10²³ atoms.
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solid lithium hydroxide is used in space vehicles to remove the carbon dioxide gas exhaled by astronauts. the hydroxide reacts with carbon dioxide to form solid lithium carbonate and liquid water. how many pounds (2.2 pounds per kilogram, 1000 grams per kilogram) of lithium hydroxide must be on board for three astronauts to spend 7 days in space, assuming each astronaut produces 1.1 kilograms of carbon dioxide per day? assume the reaction has a 100% yield.
3.794 lbs of LiOH must be on board for the three astronauts to spend 7 days in space.
First, let's calculate the total amount of CO2 produced by the three astronauts in 7 days:
1.1 kg/astronaut * 3 astronauts = 3.3 kg CO2 produced in 7 days
Next, let's find the moles of CO2 produced:
3.3 kg CO2 * 1000 g/kg = 3300 g CO2
1 mole of CO2 weighs 44 g, so:
3300 g / 44 g/mol = 75 moles CO2
The balanced equation for the reaction of LiOH with CO2 is:
LiOH + CO2 -> Li2CO3 + H2O
For every mole of CO2, 1 mole of LiOH is required, so:
75 moles LiOH needed
Finally, to find the weight in pounds, we need to convert moles to grams and then to pounds:
75 moles * 23 g/mol = 1725 g
1725 g / 1000 g/kg = 1.725 kg
1.725 kg * 2.2 lb/kg = 3.794 lbs of LiOH needed for the reaction.
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how much heat is released from a combustion reactoin of c6h6 when 13.5 grams of h20 product are created?
The heat that released from a combustion reaction of C₆H₆ when 13.5 grams of h20 product are created is -1588.7 KJ/mole
Heat is produced when kinetic energy moves within a material or an object, or when kinetic energy moves from an energy source to a material or an object. Such energy can be transported using three different mechanisms: radiation, conduction, and convection.
Heat energy is created by the movement of tiny atoms, molecules, or ions in solids, liquids, and gases. It is possible to transfer heat energy from one thing to another. Heat is a flow or transfer that happens when two objects have different temperatures from one another.
2C₆H₆ + 15O₂ → 12CO₂ + 6H₂O
2x49.04 2x10 12x-393.5 6x-285.8
= [ 12(-393.5 )+6(-285.8) ] - [ 2(49.04)+(2x10) ]
= - 6936.8 - 98
= - 6534.8 KJ/mole
we have 13.5 gram of water produce so,
moles water = mass/ mass molar = 13.5 g/ 18 g/moles = 0.75 moles
with unitary method we can find the moles of benzene
mole benzene = 2/6 x 0.75 = 0.25 moles
so the heat release of 0.25 moles of benzene is
= - 6534.8 KJ/mole x 0.25 moles = -1588.7 KJ/mole
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3ni decays by a first-order process via the emission of a beta particle. the 63ni isotope has a half-life of 100. years. how long will it take for 85% of the nickel to undergo decay?
It takes 273.75 years for 85% of the nickel to undergo decay.
100 years is the half-life, or t1/2.
initially 100% of the concentration, [A]o
Final concentration [A] = 15% (after decay of 85%)
Time = ?
It is stated that a first-order reaction's half life is;
t1/2 = ln (2) / k
k = ln(2) / 100
k = 0.00693y⁻¹
As follows is the integral rate law for first order reactions:
ln(A) = ln(A]o kt
kt = ln[A]
o - ln[A]
(ln[A]o - ln[A]) / k
t = [ln(100) - ln(15)] /0.00693
t = 1.897 / 0.00693
t = 273.75 years
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in an experiment with 1m ch4, 2m h2s, 1mcs2, and 2mh2, if ch4 is 1.39 m at equilibrium, what are the concentrations of the other substances?
Generally, Equilibrium is defined as a state in which opposing forces or actions are balanced so that one is not stronger or greater than the other.
Concentration of CH₄ = 1.39
So X here is = -1.39 + 4 = 2.61
So concentration of,
H₂S = 8 - 2 × (2.61) = - 2. 78 M
Cs₂ = 4 - 2.61 = 1.39 M
H₂ = 8 - 4 (2.61) = -2.44 M
Concentration is defined as the amount of a substance, such as a salt, that is in a certain amount of tissue or liquid, such as blood. When less water is present in a substance it usually becomes more concentrated.
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at which temperature will hg l and hg s reach equilibrium
Temperature at which Hg (l) and Hg (s) reach equilibrium is 234 K.
Equilibrium temperature is defined as the condition under which two substances in physical contact with each other exchange no heat energy. Two substances are said to be in thermal equilibrium at the same temperature. A hypothetical water temperature at which the net heat flux is zero is defined as the Equilibrium water.
Temperature at which liquid Hg will convert to solid Hg at atmospheric pressure is melting point of Hg which is -39 C = -39 + 273 K = 234 K.
Hence, the equilibrium temperature of Hg is 234K.
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cesium-139 undergoes radioactive decay by one mode and generates barium-139. what mode of decay is consistent with this product?
The product's beta decay mode is consistent.
Cesium-139 decays by beta decay to either the radioactive isotope of stable barium-139 or to barium-139m, which is a meta-stable form of barium with a half-life of roughly 30 years.
In the environment, cesium-139 decays by releasing beta particles. As mentioned earlier, barium-139m is the short-lived decay product of cesium-139. The latter isotope gives out moderately energetic gamma radiation, which afterwards transforms into a stable form of barium.
C degrades through a process known as beta decay. One of the neutrons which are in the carbon atom turns into a proton during this process, which results in the decay of a carbon atom into a nitrogen atom. By adding one more proton to the atom, this results in the formation of a nitrogen atom rather than a carbon atom.
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Select the TRUE statements below regarding Friedel-Crafts reactions. a. Friedel- Crafts reactions are sensitive to the presence of electron-withdrawing groups on the benzene ring. Friedel-Crafts reactions give poor yields when a strong or moderately deactivating substituent is present on the benzene ring. b. The use of a primary, secondary, or tertiary amine group on the benzene ring results in a better yield because the Lewis acid used in the Friedel-Crafts reaction reacts with the lone pair on the nitrogen atom to form an adduct and these substances are strong activators toward EAS reactions. c. Aryl and vinyl halides do not readily form carbocations and are not used in Friedel-Crafts reactions. d. Polyalkylations are worrisome in the Friedel-Crafts alkylation reaction. An alkyl group is an activator, and when one alkyl group has been placed onto a benzene ring, this activates the ring for further alkylations. e. Polysubstitutions are a problem in the Friedel-Crafts acylation reaction. The acyl group is a deactivator toward EAS and does not promote a further acylation of the benzene ring.
Regarding Friedel-Crafts reactions, statements in options a and d are accurate.
In order to attach substituents to an aromatic ring, Charles Friedel and James Crafts created a series of reactions in 1877 known as the Friedel-Crafts reactions.Alkylation reactions and acylation reactions are the two primary categories of Friedel-Crafts processes. Both work by substituting electrophilic aromatics.
a.Friedel- Crafts reactions are sensitive to the presence of electron-withdrawing groups on the benzene ring. Friedel-Crafts reactions give poor yields when a strong or moderately deactivating substituent is present on the benzene ring.
d.Polyalkylations are worrisome in the Friedel-Crafts alkylation reaction. An alkyl group is an activator, and when one alkyl group has been placed onto a benzene ring, this activates the ring for further alkylations.
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which piece of evidence best supports charles's law?
1. A graph relating pressure and volume
2. A Graph relating pressure and quantity
3. A Graph relating temperature and volume
4. A Graph relating temperature and pressure
Charles' Law asserts that, with constant pressure, the volume of a gas is precisely proportional to its temperature. The goal of this experiment might be to demonstrate that a gas's volume grows with temperature by measuring the volume of the gas at various temperatures.
Simply put, what is Charles law?According to Charles' Law, for a given mass of gas under a constant pressure, the volume changes in direct proportion to the absolute temperature of the gas. The Kelvin scale is used to measure temperature in absolute terms.
How does Charles law at constant volume work?According to Charles' law, an ideal gas's volume under constant pressure is precisely proportional to its absolute temperature. Additionally, the law specifies the Kelvin temperature.
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a reaction has a rate law of rate = (1.25 m⁻²s⁻¹)[a][b]². what concentration of [b] would give the reaction a rate of 0.0891 m/s if the concentration of [a] is 0.250 m?
The reaction has a rate law of the rate = (1.25 m⁻²s⁻¹)[A][B]². The concentration of [B] will give the reaction of rate of 0.0891 m/s if the concentration of [A] is 0.250 M is [B] is 0.52 M.
The concentration of [A] = 0.250
The Rate = (1.25 m⁻²s⁻¹)[A][B]²
By solving the equation , we get :
0.0857 = 1.25 [A] [B]²
0.0857 = 1.25 × 0.250 × [B]²
0.0857 = 0.3125 [B]²
[B]² = 0.27424
[B] = 0.52 M
Thus, the concentration of the [B] is 0.52 M with the reaction has a rate law of rate = (1.25 m⁻²s⁻¹)[A][B]².
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do tetroprotic acids exist
Yes, tetraprotic acids do exist. An example of a tetraprotic acid is Ethylenediaminetetraacetic acid (EDTA).
Acids are majorly monoprotic, diprotic and triprotic depending on the amount of hydrogen ions they produce in water. Monoprotic acids produce a single hydrogen ion when they are dissolved in water. For example, hydrochloric acid. Diprotic acids produce two hydrogen atoms when they are dissolved in water. For example, sulphuric acid.
Similarly, triprotic acids release three hydrogen when dissolved in water. An example of triprotic acids is phosphoric acid. Tetraprotic acids also exist. EDTA is an example of a tetraprotic acid.
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Find the number of moles of calcium chloride required to react with 350 grams of silver nitrate - Really looking for a well written explanation with steps
Calcium chloride (CaCl2) and silver nitrate (AgNO3) react to form calcium nitrate (Ca(NO3)2) and silver chloride (AgCl) according to the following balanced equation:
CaCl2 + AgNO3 → Ca(NO3)2 + AgCl
In order to find the number of moles of calcium chloride required to react with 350 grams of silver nitrate, we can use the concept of stoichiometry. Stoichiometry is the study of the quantitative relationships between the reactants and products in a chemical reaction. By using the balanced equation and molar masses of the reactants and products, we can calculate the number of moles of one substance required to react with a certain number of moles of another substance.
Here's the step by step process:
Determine the molar mass of silver nitrate (AgNO3). The molar mass of AgNO3 is 169.87 grams/mole.
Convert the given mass of silver nitrate to moles. To do this, divide the mass by the molar mass:
350 grams AgNO3 / 169.87 grams/mole = 2.05 moles AgNO3
Use the stoichiometry of the balanced equation to determine the number of moles of calcium chloride required to react with 2.05 moles of silver nitrate. The coefficients in the balanced equation indicate the molar ratios between the reactants and products. In this case, the coefficients are 1:1, meaning that for every 1 mole of calcium chloride that reacts, 1 mole of silver nitrate also reacts. Therefore, the number of moles of calcium chloride required is 2.05 moles.
In conclusion, to react with 350 grams of silver nitrate, we need 2.05 moles of calcium chloride.
at which altitude can the ow regime be considered to roughly change between continuum and slip-ow?
The change between continuum and slip-flow regimes in atmospheric boundary layer can occur at an altitude of around 10 meters above the surface.
In the atmospheric boundary layer, the change from continuum to slip-flow regime occurs as the height above the surface increases to 10 meters. At this height, the atmospheric boundary layer is still considered to be in the continuum regime, but the influence of the roughness elements on the surface becomes significant, leading to a transition to the slip-flow regime.
This transition is an important consideration for atmospheric boundary layer modeling and for understanding the atmospheric boundary layer structure and turbulence.
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which isomer of pentane has the lowest boiling point
The isomer of pentane which has the lowest boiling point is neo-pentane as it has a lower surface area due to its branched chain.
Pentane is an alkane which consists of five carbon atoms bound by single bonds. Pentane has three isomers namely n-pentane, iso-pentane and neo-pentane. Among these three isomers, neo-pentane has the lowest boiling point.
The boiling point of a particular alkane depends on the surface area of the molecule, that is, the higher the surface is, the higher will be the boiling point of that alkane. The branched-chain isomer of an alkane will have a lower surface area as compared to its straight-chain isomer and therefore the branched-chain isomer of the alkane will possess a lower boiling point than its straight-chain isomer.
Hence, we can say that the higher the number of branches, lower is the boiling point. Neo-pentane has the lowest boiling point among all the isomers of pentane.
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What are the 3 parts of the periodic table?
The 3 parts of the periodic table are metals on the left end, Non-metal on the right end, and metalloids lies between metals and non-metals.
Who was the sole creator of the periodic table?
While trying to categorize the elements in February 1869, Mendeleev discovered the existence of the periodic table, or Periodic System as he later termed it.
What does the present periodic table mean?The elements are given in the contemporary periodic table in increasing order of atomic number. The quantity of protons in an atom's nucleus is known as the atomic number. Proton count establishes an element's identification (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).
Who and when introduced the present periodic table?Henry Moseley established the Modern Periodic Law & Table in 1913. Mendeleev was the first to classify all of the known elements, and he provided the law called the Mendeleev's periodic law.
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melanie obtains a value of 2.784 g/ml for the density of her unknown solution. the actual density of the solution is 1.381 g/ml. what is the % error of melanie's measurement? express your response to two digits after the decimal.
The percentage error of melanie's measurement of the unknown solution would be = -50%
What is percentage error?Percentage error is defined as the difference between estimated value and the actual value in comparison to the actual value and is expressed as a percentage.
The actual density of the unknown solution = 1.381 g/ml.
The value obtained (expected value) = 2.784 g/m
Percentage error
=actual value-expected value/ expected value×100/1
= 1.381- 2.784/2.784 × 100/1
= −1.403/2.784 × 100
= -0.5 × 100
= -50%
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the pressure (in atm) exerted by 4.24g of helium gas, he, at 10.0°c when placed in a 470. ml container
The pressure exerted by 4.24 g of helium gas, He, at 10.0 °C when placed in a 470. ml container is 26.1 atm.
The ideal gas equation is :
P V = n R T
p = n R T / V
where,
P = pressure of the gas
V = volume of the gas = 0.470 L
n = moles
R = gas constant
T = temperature = 10 °C = 283 K
The moles of the He = mass / molar mass
= 4.24 / 8
= 0.53 mol
Therefore, the pressure is :
P = n R T / V
P = ( 0.53 × 0.082 × 283 ) / 0.470
P = 26.1 atm
Thus, The pressure is 26.1 atm.
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why salt concentration increase at reboiler in solid liquid extraction
In solid-liquid extraction, the concentration of salt in the reboiler can increase due to several reasons: Evaporation of the solvent, Crystallization, Incomplete extraction, Poor mixing
Evaporation of the solvent: As the solvent is heated in the reboiler, some of it will evaporate, leaving behind a higher concentration of the solute (salt) in the reboiler.Crystallization: If the solute concentration becomes too high, the salt may start to crystallize out of the solution, further increasing its concentration in the reboiler.Incomplete extraction: If the extraction process is not optimized, some of the salt may remain in the reboiler instead of being transferred to the extract. This will result in a higher concentration of salt in the reboiler.Poor mixing: If the reboiler is not properly mixed, the salt concentration will be higher in some areas than others, leading to an overall increase in the average concentration of salt in the reboiler.Know more about solid-liquid extraction
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identify the following compounds as ionic (i) or covalent (c)
a) CO2
b) FeCl3
c) LiBr
d) C2H4
e) NaCl
f) SO3
g) KCl
h) P2O5
CO2 - Covalent
FeCl3 - Ionic
LiBr - Ionic
C2H4 - Covalent
NaCl - Ionic
SO3 - Covalent
KCl - ionic
P2O5 - Covelent
What are ionic compounds?Ionic compounds are compounds consisting of positively charged ions (cations) and negatively charged ions (anions) held together by ionic bonds. They typically have high melting and boiling points, are crystalline solids at room temperature, and are good conductors of electricity when dissolved in water or melted.
The covalent compounds on the other had are not made up of the ions and they are the ones that are not soluble in water.
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sylvanite is a mineral that contains 28.0 % gold by mass. how much sylvanite would you need to dig up to obtain 95.0 g of gold? express your answer with the appropriate units.
To obtain 95.0 g of gold from sylvanite, we would need to dig up 343.75 g of sylvanite.
To obtain 95.0 g of gold from sylvanite, we would need to dig up 343.75 g of sylvanite, since 28.0 % of the sylvanite is gold. To calculate this, we would need to use the following equation:
95.0 g Gold = (100.0 g Sylvanite)(0.28)
Rearranging the equation to solve for the mass of Sylvanite, we get:
100.0 g Sylvanite = (95.0 g Gold)/(0.28)
Solving for the mass of Sylvanite, we get 343.75 g Sylvanite. Therefore, to obtain 95.0 g of gold from sylvanite, we would need to dig up 343.75 g of sylvanite. The units for this answer are therefore 343.75g Sylvanite.
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write a net ionic equation for the reaction between aqueous solutions of hydrofluoric acid and barium hydroxide.
This reaction can be written as:
HF(aq) + Ba2+(aq) + 2OH-(aq) → BaF2(s) + H2O(l)
The net ionic equation for the reaction between aqueous solutions of hydrofluoric acid (HF) and barium hydroxide
(Ba(OH)2) is : HF + Ba(OH)2 → BaF2 + H2O.
The net ionic equation for the reaction is:
HF + Ba(OH)2 → BaF2 + H2O
Chemically, this reaction can be written as:
HF(aq) + Ba2+(aq) + 2OH-(aq) → BaF2(s) + H2O(l)
An ionic equation is a chemical equation that describes the movement of ions in a chemical reaction. In an ionic equation, charged ions are represented by their chemical symbols and charges. Neutral molecules are represented by their chemical formulas.
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EXPERIMENT 1: What was the initial temperature displayed on the thermometer before adding the NaOH to the HCl?
1. 26.5 ºc
2. 21.1 ºc
3. 21.105 ºc
4. 21.5 ºC
The temperature is an important factor to consider when performing experiments. In this particular experiment, you need to know the initial temperature displayed on the thermometer before adding sodium hydroxide (NaOH) to hydrochloric acid (HCl). The answer to this question is option 4: 21.5 °C.
To get the initial temperature, you need to measure the temperature of the solution before adding the NaOH to the HCl. This is done by reading the temperature displayed on the thermometer. In this experiment, the temperature on the thermometer before adding NaOH to HCl was 21.5 °C.
It is important to note that the temperature of the solution can change when substances are added. Therefore, it is important to record the initial temperature of the solution before adding any substances. This is why it is important to know the initial temperature displayed on the thermometer before adding NaOH to HCl. By recording the initial temperature, you can accurately compare the changes in temperature after adding substances to the solution.
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describe the location and light reflected on the moon throughout the month
Answer:
Explanation:
moonlight is sunlight that shines on the moon and bounces off
How many resonance structures are possible for ozone O3?
Two primary resonance structures are possible for ozone O3. This apply equally to the molecule's total hybrid structure.
A resonance structure: what is it?Resonance structures are arrays of Lewis structures that explain how the electrons in a polyatomic ion or molecule become delocalized. Because molecules and polyatomic ions generally have partial charges and fractional bonds, a single Lewis structure typically falls short of explaining the bonding in a molecule or polyatomic ion.
What function do resonance structures serve?They are utilized when there are number of aspects for lone pairs and double bonds on an atom. When there are numerous ways to create a Lewis dot diagram that meets the octet rule, resonance structures develop.
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What volume of 0.4163M barium chloride will react completely with(a) 12.45 mL of 1.732M sulfuric acid?(b) 15.00 g of ammonium phosphate?(c) 35.15 mL of 1.28M potassium carbonate?
Answer:
Explanation:The equation for the reaction between barium chloride and sulfuric acid is:
BaCl2(aq) + H2SO4(aq) -> BaSO4(s) + 2HCl(aq)
(a) Using the equation, we can calculate the number of moles of barium chloride and sulfuric acid:
n(BaCl2) = 0.04163 * 12.45 mL = 0.5138 mol
n(H2SO4) = 1.732 * 15.00 mL = 0.2601 mol
Since the ratio of barium chloride to sulfuric acid is 1:2, the limiting reagent (the reagent that determines the amount of product formed) is the sulfuric acid. The maximum amount of barium sulfate that can be formed is equal to the amount of sulfuric acid used, which is 0.2601 mol.
(b) To find the amount of barium chloride required to react with ammonium phosphate, we need to write the balanced equation for the reaction. The balanced chemical equation for the reaction between barium chloride and ammonium phosphate is not known.
(c) The equation for the reaction between barium chloride and potassium carbonate is:
BaCl2(aq) + K2CO3(aq) -> BaCO3(s) + 2KCl(aq)
Using the equation, we can calculate the number of moles of barium chloride and potassium carbonate:
n(BaCl2) = 0.04163 * 35.15 mL = 1.4506 mol
n(K2CO3) = 1.28 * 35.15 mL = 0.4536 mol
Since the ratio of barium chloride to potassium carbonate is 1:2, the limiting reagent (the reagent that determines the amount of product formed) is the potassium carbonate. The maximum amount of barium carbonate that can be formed is equal to half the amount of potassium carbonate used, which is 0.4536/2 = 0.2268 mol.
The volume of barium chloride is :
(a) 12.45 mL of 1.732 M sulfuric acid is 0.050 L.
(b) 15.00 g of the ammonium phosphate is 0.027 L.
(c) 35.15 mL of 1.28M the potassium carbonate is 0.018 L.
The molarity of the barium chloride = 0.4163 M
(a) The volume of sulfuric acid = 12.45 mL = 0.01245 L
The molarity = 1.732 M
Moles = molarity × volume
= 1.732 × 0.01245
= 0.021 mol
The volume of the BaCl₂ = moles / molarity
= 0.021 / 0.4163
= 0.050 L
(b) 3BaCl₂ + 2(NH₄)₃PO₄ ----> Ba(PO₄)₂ + 6NH₄Cl
The mass of the ammonium phosphate = 15 g
The moles of ammonium phosphate = 15 / 149
= 0.100 mol
Moles of (NH₄)₃PO₄ = (2/3) 0.100
= 0.066
The volume of the BaCl₂ = 0.066 × 0.4163
= 0.027 L
(c) The moles of the potassium carbonate = 0.03515 × 1.28
= 0.044 mol
The volume of the BaCl₂ = moles / volume
= 0.044 / 0.4163
= 0.018 L.
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Choose the one best response for why you discard clean broken glassware, melting point capillaries, pipets or glass test tubes in the broken glass box and not in the regular trash can.
(a) Glassware may still contain chemicals that need to be disposed of properly.
(b) The stockroom cannot charge for broken glassware if it is discarded in the regular trash.
(c) Potential injuries could occur to the janitorial staff if the broken glassware is not seen.
The one best response for the discard clean broken glassware, melting point capillaries is the option (c) Potential injuries could occur to the janitorial staff if the broken glassware is not seen.
It is very danger to throw out the broken glassware away that has been in the touch with the chemical products in a regular garbage or the recycling containers. This is dangerous because of it can lead to the serious injuries if the worker that collects it from the trash and it is not aware of the presence of the broken glass in the garbage bin.
Thus, Potential injuries can occur to the janitorial staff if the broken glassware is not seen.
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Determine the mass of iron(II) hydroxide produced if 279 g Fe and 733.6 g NiO(OH) react.
sum all the atomic mass of the constituent atoms
How do you compute a reaction’s molar mass?To determine the molar mass of a compound containing many atoms, add all of the constituent atoms’ atomic masses. For example, the molar mass of NaCl may be computed by first determining the atomic masses of sodium (22.99 g/mol) and chlorine (35.45 g/mol) and then combining them.
Multiply the atomic weight of each element (from the periodic table) by the number of atoms of that element in the compound. 3. Add everything together and include the units of grams/mole after the number. Many (but not all) difficulties can be solved by simply rounding the atomic weights and molar masses to the closest 0.1 g/mole.
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A student uses 2.80g of iron to make 12.5g of hydrated iron(ii) sulfate crystals. this is a 90% yeild.
calculate the mass of hydrated iron (ii) sulfate crystals made from 2.8g of iron if the yeild is 100%.
Answer:
2.52g
Explanation:
2.8g ÷ 100 = 0.028 x 90 = 2.52g
According to percent yield concept, 3.11 grams of hydrated iron (ii) sulfate crystals are made from 2.8 g of iron if the yield is 100%.
What is percent yield?Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.
In cases where percent yield is over 100% it indicates that more sample is recovered than the predicted amount.This condition arises when there are other simultaneous reactions taking place leading to the formation of product. It can also arise if there is incomplete removal of impurities from the sample .
If 2.80 g is 90% yield than for 100 % yield 2.80×100/90=3.11 g of iron (II) sulfate is needed.
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Use the information to answer the following question.
2 AB + 2X2 → 2 AX2 + B2
What are the potential identities of A, B, and X?
A A = Mg, B = CI, X = O
B A = Na, B = O, X = CI
C A = Na, B = CI, X = O
D A = Mg, B = 0, X = CI
Option A and option C are the potential identifiers of A, B and X.
What is chemical equation?The transfer of electrons and the rearranging of atoms, the equation depicts how the reactants become the products.
Chemical formulas serve as a representation of the reactants and products, and each element is represented by its chemical symbol.
How do you determine it?The chemical symbols for the components of the reaction are represented by A, B, and X.
Options A, B, C, and D offer potential elemental arrangements for A, B, and X.
Because B cannot be represented by 0, only Options A (A = Mg, B = Cl, X = O) and C (A = Na, B = Cl, X = O) are viable choices (Option D). Magnesium, chlorine, and oxygen are represented by Option A, while sodium, chlorine, and oxygen are represented by Option C.
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