Answer:
b. Gas particles are far apart so they are easy to compress together.
Explanation:
What is the molecular formula of a compound with the empirical formula SF5 and a formula mass of 254.1 amu?
molecular formula:
What is the molecular formula of a compound with the empirical formula CH2O and a formula mass of 180.156 amu?
molecular formula:
The molecular formula is a notation indicating the number of atoms of each element present in a compound.
The molecular formula of a compound with given empirical formula can be calculated as follows:
molecular formula = (empirical formula)n
The molecular formula of the given compound is as follows:
(SF5)n = 254.1
{32 + 19(5)}n = 254.1
127n = 254.1
n = 2
Molecular formula = (SF5)₂ = S₂F₁0
(CH₂O)n = 180.156 amu
{12 + 2 + 16}n = 180.156
(30)n = 180.156
n = 6
Molecular formula = (CH₂O)₆ = C₆H₁₂O₆
Therefore, the molecular formula of a compound with the empirical formula SF₅ and a formula mass of 254.1 amu is S₂F₁₀. The molecular formula of a compound with the empirical formula CH₂O and a formula mass of 180.156 amu is C₆H₁₂O₆Learn more about molecular formula at: https://brainly.com/question/14425592
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When 96.0 g of calcium and 41.7 g of nitrogen gas undergo a reaction that has a 86.7% yield, what mass of calcium nitride forms?
g calcium nitride
Taking into account definition of percent yield, the mass of calcium nitride formed is 102.614 grams.
Reaction stoichiometryIn first place, the balanced reaction is:
3 Ca + N₂ → Ca₃N₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Ca: 3 molesN₂: 1 moleCa₃N₂: 1 moleThe molar mass of the compounds is:
Ca: 40.08 g/moleN₂: 28 g/moleCa₃N₂: 148.24 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Ca: 3 moles ×40.08 g/mole= 120.24 gramsN₂: 1 mole ×28 g/mole= 28 gramsCa₃N₂: 1 mole ×148.24 g/mole= 148.24 gramsLimiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction.
Limiting reagent in this caseTo determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 28 grams of N₂ reacts with 120.24 grams of Ca, 41.7 grams of N₂ reacts with how much mass of Ca?
mass of Ca= (41.7 grams of N₂× 120.24 grams of Ca) ÷28 grams of N₂
mass of Ca= 179.07 grams
But 179.07 grams of Ca are not available, 96 grams are available. Since you have less mass than you need to react with 41.7 grams of N₂, Ca will be the limiting reagent.
Mass of Ca₃N₂ formedConsidering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 120.24 grams of Ca form 148.24 grams of Ca₃N₂, 96 grams of Ca form how much mass of Ca₃N₂?
mass of Ca₃N₂= (96 grams of Ca× 148.24 grams of Ca₃N₂)÷ 120.24 grams of Ca
mass of Ca₃N₂= 118.355 grams
Then, 118.355 grams of Ca₃N₂ can be produced from 96.0 g of calcium and 41.7 g of nitrogen gas.
Percent yieldThe percent yield is the ratio of the actual return to the theoretical return expressed as a percentage and it is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:
percent yield= (actual yield÷ theoretical yield)×100%
where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product.
Mass of calciumn nitride formedIn this case, you know:
percent yield= 86.7%actual yield= ?theorical yield= 118.355 gramsReplacing in the definition of percent yields:
86.7%= (actual yield÷ 118.355 grams)×100%
Solving:
86.7%÷ 100%= actual yield÷ 118.355 grams
0.867= actual yield÷ 118.355 grams
0.867× 118.355 grams= actual yield
102.614 grams= actual yield
Finally, the mass of calcium nitride formed is 102.614 grams.
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WILL GIVE BRAINLIEST NEED HELP ASAP PLEASE
The recommended calcium intake for teenagers is 1300 mg per day. A glass of milk contains 305 mg of calcium. One glass contains 8 fluid ounces.
One fluid ounce equals 29.6 mL. One Liter contains 1000 mL. How many liters of milk should a teenager drink per day to get the recommended amount
of calcium?
A chemist is called by the highway patrol to identify a clear colorless liquid that was spilled on the freeway. What tests could the chemist do to identify whether the liquid is a mixture or a substance?
A chemist is called by the highway patrol to identify a clear colorless liquid that was spilled on the freeway. The test chemist could do to identify whether the liquid is a mixture or a substance is melting point.
If it is to be identified that whether a liquid is a mixture or a pure substance, testing the melting point is preferably considered.
Melting point is a a range of temperature of a substance from which the first crystal starts melting.
Pure substances have sharp melting point but an impure substance or a mixture melts over a given range of temperature.
By looking at the overall composition, pure substance and mixture can be identified visually but it is quite difficult in case of a clear, colorless liquid.
Therefore, melting points can be used to find out whether a liquid is a mixture or a substance.
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Which of the following quantities is equivalent to 3.7 cm?
A. 3.7×10⁻⁵ km
B. 3.7×10⁵ μm
C. 3.7×10⁻² mm
D. 3.7×10² mm
E. 3.7×10⁻³ m
Answer:
A. 3.7×10^-5 km
Explanation:
Whenever there is scientific notation, you always move the decimal the amount of places that the exponent tells you. For a, you would move the decimal 5 times to the left and the km version will be equivalent to the cm version. I hope this helps!
The quantity is equivalent to 3.7 cm is 3.7×10⁻⁵ km. Therefore, option A is correct.
What do you mean by the scientific notation ?The term scientific notation is defined as a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10.
For example, 650,000,000 can be written in scientific notation as 6.5 ✕ 10^8.
Scientific notation is used to simplify numbers that are too big.
In the scientific notation, you always displace the decimal the amount of places that the exponent tells you. Then would move the decimal 5 times to the left and the km version will be equivalent to the cm version.
Thus, The quantity is equivalent to 3.7 cm is 3.7×10⁻⁵ km, option A is correct.
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A two-step reaction mechanism that has an overall reaction of 2H₂O₂(aq) step and rate law. Step 2: H₂O₂ + Or → H₂O + O₂ + I (fast) Rate = K[H₂O₂][1] 2H₂O(1) + O₂(g) has the following fast Which is the correct rate-determining step given the information in the reaction above? O step 2: H₂O2 + OI→ H₂O + O₂ + 1¯ step 3: 2H₂O2 + 2H₂O + OI™ O step 1: H₂ + O₂ + 1 → H₂O2 + Or O step 1: H₂O2 + H₂O + or S
1. Rate law - A chemical reaction's rate and the concentrations of the reactants involved are correlated by an expression known as the rate law, commonly referred to as the rate equation.
Step (1) is the rate-determining step because it is the slow step, it determines the reaction's overall pace; therefore,
Rate law= K [H₂O₂] [I⁻]
2. order of reaction = second order
The Order of Reaction describes how the rate of a reaction depends on the concentration of each component. As a result, the rate of a first-order reaction depends on the concentration of a single species.
3. First step is the rate determining step because it is the slow step. Slow step determines the rate.
The rate-determining step is the one that establishes the speed (rate) of the complete chemical reaction.
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Your question is incomplete. For missing part refer the image below.
Now i know that each of the 3 main layers of earth has its own features,as follows….
The 3 main layers of earth has its own features, as follows;
The Crust: this is seen as the outer layer and this is where humans as well as animals live and plants develop.The Mantle: is seen as the semi-solid magma layer that is made up of iron, magnesium, as well as silicon.The Core: is known to be centrally made up of solid mass of metal ( and it has an inner core) as well as a liquid mass of iron/nickel (which is the outer core).What is the full meaning of Earth?The earth is known to be a kind of fragmental particles that are made up of different part of the surface of the globe.
Note therefore, The 3 main layers of earth has its own features, as follows;
The Crust: this is seen as the outer layer and this is where humans as well as animals live and plants develop.The Mantle: is seen as the semi-solid magma layer that is made up of iron, magnesium, as well as silicon.The Core: is known to be centrally made up of solid mass of metal ( and it has an inner core) as well as a liquid mass of iron/nickel (which is the outer core).Learn more about core from
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The monomers of proteins are called amino acids. Draw the protein amino acid alanine and label the central carbon, the amino functional group, the carboxyl functional group, and the methyl functional group. Be sure to show ALL of the atoms within the molecule (Alanine has the molecular formula C3H7NO2). Draw a second amino acid of your choice (glycine is the simplest amino acid to draw).
Compare the compressibility of gases and liquids. Support your answer by describing the arrangement of particles in gases
and liquids.
The compressibility of gases is more difficult than that of liquids. Because, the intermolecular forces in gases is very less and to compress the diffused gas molecules high pressure have to be applied.
What is compressibility ?Compressibility of a substance is the ability to compress to decrease its volume under high pressure. It is dependent on the intermolecular force in the substance.
In liquids unlike solids there is some space for the particles to move apart and that is why liquid can flow. In the case of gases, this distance between particles is greater and particles are free to spread everywhere. Therefore, the intermolecular attraction is very less in gaseous substances.
To compress the substance, the force of attraction between particles have to be increased and volume have to be decreased. Therefore, it is too difficult to compress gases, in which particles are far apart from each other.
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pleeeeeaaseeeee heeeelpppp
Answer: I think it's C
Explanation:
Probably wrong. I have a different type of chemistry.
I know what the answers are, but how to I get to that point? I don’t understand what calculations I should be doing.
Answer:
which question doyou need the answer?
What is the volume of a rectangular
object with length 17 cm, width 11 cm,
and height 6 cm?
Answer:
1122 cm cubed
Explanation:
The formula for volume of a rectangle would be length times height times width, so just do 17 * 11 * 6 to get your answer, which should be 1122 with units of cm cubed, or cm^3.
Hope this helps! Let me know if you have any confusion!
How would each of the following procedural errors affect the value obtained for the
molar volume of hydrogen gas? Explain your reasoning.
(a) Some bubbles of hydrogen gas remained clinging to the sides of the tube.
(b) Some magnesium metal was left un-reacted at the end of the experiment.
(c) 7 mL of the HC1 were used instead of 5 mL.
Molar volume of hydrogen gas is because 'some bubbles of hydrogen gas remained clinging to the sides of the tube'
The volume occupied by 1 mole of the molecules of a gas at STP i.e. standard temperature and pressure
Here if liquid is not vaporized completely then bubbles of hydrogen gas remained clinging to the sides of the tube and then the condensed vapor in the flask contains the air which is initially occupied before the liquid is heated and when calculating the molar mass of the vapor the moles of air which are initially present are not excluded, so that the molar mass of the vapor would be increase in large value
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See attached. Thank you very much!!! :)
The functional groups that are present the compound is shown in the image is;
HaloalkaneAlkeneAmineWhat is the functional group?The functional group is the atom, group of atoms or bond that is responsible for the chemical reactivity of the members of a particular family of organic compounds. We have to note that there are several families of organic compounds and the reactivity of these families is determined mostly by the kind of functional group that we have in that particular molecule.
Now we have the structure that has been shown in the image attached. We now have to look at the image and determine the kind of functional groups that we have in the molecule. In this case, we are actually looking out for the very points along the chain where a chemical reaction is possible.
We can see that the functional groups that we have here are;
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The mass of 3 different marbles was determined to
be equal to 19.7 g, 19.21 g, and 18 g. What is the
average mass of the marbles?
A proton has a charge of
a. -1 and is smaller in size than an electron
b. +1 and is smaller in size then an electron
c. -1 and is larger in size then an electron
d. + and is larger in size then an electron
A proton has a charge of +1 and is larger in size then an electron.
Negatively charged electrons typically orbit the atomic nucleus of an atom. Protons and neutrons are substantially larger than electrons. Their charge is as powerful as a proton despite their small size; hence one proton and one electron will cancel each other out. Protons have a mass of 1 atomic mass unit (amu), or around 1.671027 kilograms, and a positive electrical charge of 1 (+1). Electrons are negatively charged particles, but protons are positively charged particles. The magnitude of the charge of an electron and a proton is the same, which is 1.6×10−19C. Electrons revolve around the nucleus of an atom in discrete orbits, but the protons reside inside the nucleus of the atom.
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!!!!PLS HELP IM TIMED!!!!!!
Shonda's car gets an average of 27 miles per gallon. Gas costs $2.25 per gallon and she drives 892 miles to get from Baltimore, MD, to Orlando, FL. What are the conversion factors she could use to calculate the cost of gas to get from Baltimore to Orlando? How much will she spend on gas?
Answer:
74.25
Explanation:
27 miles = 1 gallon
1 mile = 1/27 mile
Distance to cover = 892 miles
We will multiply this number with gallons of gas used for 1 mile.
892 miles = 1/27 * 892
892 miles = 33.04 gallons of gas
Rounding off to nearest whole number;
892 miles = 33 gallons
Cost of one gallon of gas = $2.25
Cost of 33 gallons = 2.25*33 = $74.25
She will spend $74.25 on gas.
An intermediate step in the industrial production of nitric acid involves the reaction of ammonia with oxygen gas to form nitrogen monoxide and water. How many grams of nitrogen monoxide can form by the reaction of 507 g of ammonia and 845 g of oxygen?
g nitrogen monoxide
Taking into account the reaction stoichiometry, 633.75 grams of nitrogen monoxide can form by the reaction of 507 g of ammonia and 845 g of oxygen
Reaction stoichiometryIn first place, the balanced reaction is:
4 NH₃ + 5 O₂ → 4 NO + 6 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
NH₃: 4 molesO₂: 5 molesNO: 4 molesH₂O: 6 molesThe molar mass of the compounds is:
NH₃: 17 g/moleO₂: 32 g/moleNO: 30 g/moleH₂O: 18 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
NH₃: 4 moles× 17 g/mole= 68 gramsO₂: 5 moles× 32 g/mole= 160 gramsNO: 4 moles× 30 g/mole= 120 gramsH₂O: 6 moles× 18 g/mole= 108 gramsLimiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. This means the when the limiting reagent is finished, the chemical reaction will stop.
Limiting reagent in this caseTo determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 68 grams of NH₃ reacts with 160 grams of O₂, 507 grams of NH₃ reacts with how much mass of O₂?
mass of O₂= (507 grams of NH₃×160 grams of O₂)÷ 68 grams of NH₃
mass of O₂= 1,192.94 grams
But 1,192.94 grams of O₂ are not available, 845 grams are available. Since you have less mass than you need to react with 507 grams of NH₃, O₂ will be the limiting reagent.
Mass of nitrogen monoxide formedThe following rule of three can be applied: if by reaction stoichiometry 160 grams of O₂ form 120 grams of NO, 845 grams of O₂ form how much mass of NO?
mass of NO= (845 grams of O₂×120 grams of NO)÷ 160 grams of O₂
mass of NO= 633.75 grams
Finally, 633.75 grams of nitrogen monoxide can form by the reaction of 507 g of ammonia and 845 g of oxygen.
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Why iodine has no even number of oxidation state?
Answer:The right answer is they don’t belong with it
Explanation:He didn’t cause
Assume the specific heat of the solution is equal to the specific heat of water
When we assume the specific heat of the solution is equal to the specific heat of water ΔHdissolution is 27×10⁻⁵
A calorimeter is a device used for heat measurements necessary for calorimetry
Here given data is 4.79g = KBr and are dissolved in 109.00g water and temperature is 21.08°C and according to calorimeter heat of capacity = 1.84 J/°C
We have to calculate enthalpy of dissolution of KBr = ?
ΔHdissolution = 27×10⁻⁵
KBr+H₂0→KBr ΔH=?
qreaction = -qcal
1.79×1.84(-2.4) = 0.8936 J
1000 = -0.0008936
4.79+109.00 = 522.11 g
qcal = 522.11 g×1.84(-2.4) = -2305 J
qreaction = -qcal = -2305 J
n(KBr) = 4.79/74.55gmol⁻¹ = 0.0642mol
2305/ 0.0642mol = 0.00002787mol⁻¹
= 27×10⁻⁵
ΔHdissolution = 27×10⁻⁵
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1. How many grams was each person's final serving of 1 burger?
Each person in the group gets two Burgers. (To Solve this Assume 4 persons per VIRTUAL group)
group)
(Key: 1 Pound = 453 grams; **burgers lose approximately 10% of their weight during
cooking.)
As per conversion units, 45.3 grams is each person's final serving of 1 burger.
As 1 burger has a weight of 1 pound which is equal to 453 grams ,and as each burger looses 10% of it's weight while cooking .
So the weight of 1 burger after cooking is,
10/100×453=45.3 g
Thus,each person's final serving of 1 burger is 45.3 grams.
What are conversion units?Conversion units or unit conversion expresses the same property with a different unit of measurement.It is a numerical expression or a number that is used to change one set of units to another.
It usually occurs through multiplicative conversion factors through which the measured quantity is changed without changing it's effects.
There are different conversion systems such as:
1) SI system
2)CGS system
3)MKS system
4) FPS system
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A CHM 111 student completing Part B recorded the mass of several pieces of dry metal as
23.7412 g.He obtained a graduated cylinder and recorded an initial water volume of 25.0 mL
upon addition of the metal pieces, the water level rose to 27.1 mL
Calculate the density of the metal in units of grams per milliliter. Report only the numerical portion of your answer (and watch your significant figures!).
The density of the metal in units of grams per milliliter is 11.31 g/mL
What is density?The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
How to determine the density of the metalThe following data were obtained from the question:
Mass of metal = 23.7412 gVolume of water = 25 mL Volume of water + metal = 27.1 mL Volume of metal = 27.1 – 25 = 2.1 mL Density of metal =?Density = mass / volume
Density of metal = 23.7412 / 2.1
Density of metal = 11.31 g/mL
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(objectives & conclusion) why it is necessary to know the different apparatus in the laboratory and how to do it
It is important to know the different apparatus in the laboratory and how to do it because these apparatus are handled carefully, and the experiment is done very carefully to avoid any mistakes.
What is a laboratory?A laboratory is a place where all scientific apparatus and instruments are put and experiments are done. These places are kept safe and hygienic and all experiment is done precisely to get results.
Thus, knowing the various lab equipment and how to utilize it is crucial because errors might happen during experiments because of how carefully this equipment must be handled.
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Suppose you are trying to find the volume of a box based on the given measurements for the length, width, and height of the box, where the height was measured in two parts. length, 1 = 2.20 in width, w = 3.71 in height, h = 10.4 in + 1 in Calculate the height, h, of the box, first keeping all digits, then rounding to the proper number of significant figures. unrounded h= 11.4 in V = rounded h = Calculate the volume (V) of the box using V = 1 · w. h. Round to the proper number of significant figures. . in ³ 11 in
The Volume of the box is 93.0 in³ to three significant figures.
What is the volume of the box?The volume of the box is the amount of space that the box contains or occupies.
The volume of the box is determined using the following formula:
Volume of box = length * width * height
The length of the box, l = 2.20 in
The width of the box, w = 3.71 in
The height of the box, h = 10.4 in + 1 in
The height of the box, h = 11.4 in
Volume of the box = 2.20 * 3.71 * 11.4 in³
Volume of the box = 93.0 in³
In conclusion, the volume of the box is calculated from the product of the height and width and length of the box.
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1. Obtain a Bg sample element bag, and weigh it to the nearest 0.01 g. Count all of the Bg atoms (beans).
All of the Bg atoms (beans) are 9.689 atoms
Butyl glycol is a clear, colorless, oily liquid with a unique sweet yet mild odor and has the formula C₆H₁₄O₂ it is a butyl ether of ethylene glycol and is miscible with water and common organic solvents it has been produced industrially for over half a century and is used primarily as a solvent in paints and surface coatings but also in inks and cleaning products.
Here given sample is Bg element bag and weigh = 0.01 g
Bg means butyl glycol atomic mass of butyl glycol is 62.07g/mol
So here to find atom;
0.01/atomic mass×6.02×10²³
0.01/62.07g/mol×6.02×10²³
= 9.698 all atoms of bg (bean)
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Convert 167 mL/h to units of liters per day. Show the unit analysis by dragging the conversion factors into the unit-factor slots.
On converting 167 mL/h , we get 4.008 L/d
Converting 167 mL/h to units of liters per day
1L=1000mL
1d=24hrs
So 167 mL/1h x1L/1000mLx24h/1d=4008L/1000d
=4.008 L/d
Unit conversion is the process of converting the measurement of a given amount between various units, often by multiplicative conversion factors that alter the value of the measured quantity without altering its effects.Unit conversion is a multi-step procedure that includes rounding, selecting the appropriate number of significant digits, and multiplying or dividing by a numerical factor.The conversion from one unit to another in order to ensure accuracy and prevent measurement misunderstanding.Learn more about unit conversion at:
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determine the formula weight of Nh4f to two decimal places
Formula weight of NH4F is 37.037 g/mol
What is formula weight ?The total of the atomic weights in the empirical formula of the compound is the formula mass, often referred to as formula weight, of a molecule. Atomic mass units are used in the formula for weight (amu)
We will choose the atomic mass of each element in the compound from the periodic table, multiply by the number of atoms, then add the result to determine the formula weight.The total atomic weights of the atoms in a molecule's empirical formula make up the formula mass (formula weight) of that molecule. The average mass of a molecule is determined by combining the atomic weights of all the atoms in the molecule to determine its molecular mass (molecular weight).Learn more about Formulae weight here:
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Calculate with full procedure:
a. The number of Fe atoms in 363.2 kg of iron.
R= 3.916 x 1027 Fe atoms
b. The mass of a sample of 1.0 x 1012 atoms of metallic silver.
R= 1.8 x 10-10g Ag
c. The number of Argon atoms in a 5.25 mg Ar sample.
R=7.91 x 1019 atoms
d. The mass of a sample of aluminum that contains the same number of atoms as 35.55 g of zinc.
R= 14.66g Al
Answer:
5.3x1022 atoms
Explanation:
If we were to represent five grams of iron in term of the number of atoms of iron, we would get 5.3x1022 atoms of iron.
7.801x|02 please I need the answers asap
Answer:
795.702
Explanation:
Solid zinc(II) sulfide reacts with aqueous hydrobromic acid (HBr) to form aqueous zinc(II) bromide and dihydrogen sulfide gas.
The equation of the double displacement reaction is:
ZnS (s) + 2 HBr (aq) → ZnBr₂ (aq) + H₂S (g)What type of reaction occurs between solid zinc(II) sulfide reacts with aqueous hydrobromic acid (HBr)?The reaction between solid zinc(II) sulfide reacts with aqueous hydrobromic acid (HBr) is an example of a double displacement reaction.
In the reaction, bromide ion from the hydrobromic acid and the sulfide ion from the zinc sulfide both displace each other from their respective positive ions to form new products. The products formed are aqueous zinc(II) bromide and dihydrogen sulfide gas.
The equation of the double displacement reaction is given below:
ZnS (s) + 2 HBr (aq) → ZnBr₂ (aq) + H₂S (g)
The zinc sulfide exists as a solid whereas the hydrobromic acid is an aqueous solution. The zinc (ii) bromide formed exists as an aqueous solution whereas dihydrogen sulfide is a gas.
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Note that the complete question is given below:
Solid zinc(II) sulfide reacts with aqueous hydrobromic acid (HBr) to form aqueous zinc(II) bromide and dihydrogen sulfide gas.
Express your answer as a chemical equation. Identify all of the phases in your answer.