Answers
Answer:
1.) 2H2 + O2 ---> 2H2O
2.) CH4 + 4Cl2 ---> CCl4 + 4HCl
Explanation:
In order to balance the equation, you have to make sure there are the same amount of each element on both sides.
Ex (#1). By adding the coefficients infront of H2 and H20, You now have 4 hydrogen's and 2 oxygens on the left side as well as 4 hydrogens and 2 oxygens on the right side.
Sorry if that's confusing, but hope this helps! :)
Related Questions
The Sun has been shining on this swimming pool all day. The water is much warmer than it was in the morning. Describe what is happening to the water in terms of temperature, particle speed, and kinetic energy.
Answers
Answer:
The waters' temp increased
Explanation:
The temperature of the water in the swimming pool has increased due to the heat from the Sun. As a result, the particles in the water are moving faster and have a higher kinetic energy than in the morning.
Using the rules of significant figures for subtraction, what is the correctly reported mass of water based on this data?
Mass of beaker and water: 28.641 g
Mass of beaker only: 22.105 g
Group of answer choices
6.54 g
50.746 g
6.536 g
6.5360 g
Answers
The correctly reported mass of water is 6.536 g.
To find the mass of water, we need to subtract the mass of the beaker from the mass of the beaker and water. Using the rules of significant figures for subtraction, we must report our answer with the same number of decimal places as the measurement with the fewest decimal places. In this case, the mass of the beaker only has four decimal places, so our answer must be reported with four decimal places as well. Therefore, the correctly reported mass of water is 6.536 g.
What are the rules of significant figures for subtraction, and why are they important in scientific measurements?The rules of significant figures for subtraction dictate that the result of a subtraction calculation must be reported with the same number of decimal places as the measurement with the fewest decimal places. These rules are important in scientific measurements because they help ensure that the precision of the result matches the precision of the original data.
What is the significance of reporting the mass of water in this problem with four decimal places, and what would happen if we reported it with fewer or more decimal places?Reporting the mass of water in this problem with four decimal places is significant because it matches the precision of the measurement with the fewest decimal places, which is the mass of the beaker only. If we reported the mass of water with fewer decimal places, we would be rounding the result and losing some of its precision. If we reported it with more decimal places, we would be implying a level of precision that is not supported by the original data.
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X-ray crystallography is a technique that allows scientists to determine the
ionic and atomic radii of elements. Which of these statements correctly
describes a trend in ionic or atomic radii in the periodic table?
Answers
Atomic radii decreases along a period and increases along a group in the periodic table.
What is periodic table?
Periodic table is a tabular arrangement of elements in the form of a table. In the periodic table, elements are arranged according to the modern periodic law which states that the properties of elements are a periodic function of their atomic numbers.
It is called as periodic because properties repeat after regular intervals of atomic numbers . It is a tabular arrangement consisting of seven horizontal rows called periods and eighteen vertical columns called groups.
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17. Find the average atomic mass unit of silicon given the following isotopes and
abundances: Silicon-28, Silicon-29, Silicon-30 with masses of 27.977, 28.976,
29.974, respectively. The percent abundance of the silicon isotopes is 92.2%, 4.7%
and 3.1%, respectively. Periodic table and it’s trends
Answers
The average atomic mass unit of Silicon : 28.0774
Further explanationGiven
Isotopes of Si(Silicon-28, Silicon-29, Silicon-30)
Required
The average atomic mass
Solution
Isotopes are elements that have the same Atomic Number (Proton)
Atomic mass is the average atomic mass of all its isotopes
Avg. atomic mass = %mass.isotopes 1 + %mass.isotopes 2...etc
Input the values :
Avg atomic mass = (0.922 x 27.977) + (0.047 x 28.976) + (0.031 x 29.974)
Avg atomic mass = 28.0774
Nitrogen forms a surprising number of compounds with oxygen. A number of these, often given the collective symbol NOx (for "nitrogen + x oxygens") are serious contributors to air pollution. They can often be interconverted, sometimes by reaction with oxygen or ozone (O3) in the air.
An atmospheric scientist decides to study the reaction between nitrogen dioxide and oxygen that produces dinitrogen pentoxide. He fills a stainless steel reaction chamber with 3.8atm of nitrogen dioxide gas and 7.3atm of oxygen gas and raises the temperature considerably. At equilibrium he measures the mole fraction of dinitrogen pentoxide to be 0.13.
Calculate the pressure equilibrium constant Kp for the equilibrium between nitrogen dioxide, oxygen, and dinitrogen pentoxide at the final temperature of the mixture.
Answers
Explanation:
The balanced equation for the reaction is:
2 NO2(g) + O2(g) ⇌ 2 N2O5(g)
The pressure equilibrium constant, Kp, for this reaction is given by:
Kp = (P(N2O5))^2 / (P(NO2))^2 * P(O2)
where P is the partial pressure of each gas at equilibrium.
We are given the initial partial pressures of NO2 and O2, as well as the mole fraction of N2O5 at equilibrium. We can use this information to calculate the partial pressures of each gas at equilibrium.
Let x be the change in partial pressure of NO2 and O2 due to the reaction, and let y be the partial pressure of N2O5 at equilibrium. Then we have:
2 NO2(g) + O2(g) ⇌ 2 N2O5(g)
Initial: 3.8 atm 7.3 atm 0
Change: -2x -x 2y
Equilibrium: 3.8-2x 7.3-x y
From the mole fraction of N2O5, we know that:
y / (3.8-2x + 7.3-x + y) = 0.13
Simplifying this gives us:
y / (11.1 - 3x + y) = 0.13
Multiplying both sides by (11.1 - 3x + y) gives us:
y = 0.13 (11.1 - 3x + y)
Expanding this out gives us:
y = 1.443 - 0.39x + 0.13y
Solving for y in terms of x gives us:
y = (1.443 - 0.39x) / (1 - 0.13)
y = (1.443 - 0.39x) / 0.87
Now, we can plug this expression for y into the expression for Kp:
Kp = ((1.443 - 0.39x) / 0.87)^2 / ((3.8-2x + y) / 11)^2 * ((7.3-x) / 11)
Simplifying this expression gives us:
Kp = ((1.443 - 0.39x) / 0.87)^2 / ((3.8-2x + (1.443 - 0.39x) / 0.87) / 11)^2 * ((7.3-x) / 11)
We can solve for x numerically using a solver or by graphing the function and finding its root. The resulting value of x can then be used to calculate Kp.
Assuming that the temperature and volume remain constant throughout the reaction, the pressure equilibrium constant Kp for the reaction at the final temperature of the mixture is approximately 2.12 x 10^-4 (in units of atm^2).
How many moles of MgS are in 100.g MgS?
Answers
Answer:
Explanation:
100/56 = 1.79 moles MgS
56 came from the periodic table for Mg and S
Which intermolecular force(s) do the following pairs of molecules experience? (Consider asking yourself which molecule in each pair is dominant?)
Answers
The Fischer projection given here is for L-enantiomer and ketopentose. Option B is correct, as there is a ketone group present in the carbohydrate monomer. Carbohydrate can have an aldehyde or ketone as a functional group.
What is a carbohydrate?
Carbohydrate monomer is a single unit that can either have an aldehyde functional group called aldose or a ketone functional group called ketose. Here in the given diagram, the monomer has a ketone group (C=O) and has five carbons, so it is considered a keto pentose. Carbohydrates are classified into L and D forms based on their OH group, and this L and D form differs from the "l" and "d" form (classified on the direction of movement around the plane polarized light).
Hence, this given diagram is L-enantiomer and keto pentose, which is option B.
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Classify each amino acid according to whether its side chain is predominantly protonated or deprotonated at a pHpH of 7.40.7.40. The pKapKa values of the Asp, His, and Lys side chains are 3.65, 6.00, and 10.53,3.65, 6.00, and 10.53, respectively.
Answers
Answer: His and Lys are deprotonated but Asp will be protonated.
Explanation:
As the pH is given as 7.4 and pK of His is given as 6.00. There will occur a positive charge on His when it's pH < pK therefore, it is neutral at the given pH.
As the pK value of Lys is 10.53 that is greater than the pH of 7.40. Therefore, charge on Lys is positive.
As the pK value of Asp is 3.65 which is less than the pH value of 7.40. Hence, Asp has a negative charge.
Therefore, we can conclude that His and Lys are deprotonated but Asp will be protonated.
If you begin with 14.0g of TiCl4(1), how many liters of H2O(g) will need?
Answers
Answer:
3.32 L
Explanation:
Step 1: Write the balanced equation
TiCl₄(l) + 2 H₂O(g) → TiO₂(s) + 4 HCl(g)
Step 2: Calculate the moles corresponding to 14.0 g of TiCl₄
The molar mass of TiCl₄ is 189.68 g/mol.
14.0 g × 1 mol/189.68 g = 0.0738 mol
Step 3: Calculate the moles of H₂O needed to react with 0.0738 moles of TiCl₄
The molar ratio of TiCl₄ to H₂O is 1:2. The moles of H₂O needed are 2/1 × 0.0738 mol = 0.148 mol
Step 4: Calculate the volume corresponding to 0.148 moles of H₂O(g)
At standard temperature and pressure, 1 mole of H₂O(g) has a volume of 22.4 L.
0.148 mol × 22.4 L/1 mol = 3.32 L
Which of the following equations has been balanced correctly?
O a. 2ZnS + 302 -> 2ZnO + 2SO2
O b. ZnS + 02 --> ZnO + SO2
O c. ZnS + 02 -> 2ZnO + SO2
O d. All of the above
O e. None of the above
Answers
The correct equation that has been balanced is option (c): ZnS + 02 -> 2ZnO + SO2. This equation is balanced because the number of sulfur atoms (1 on each side) and the number of oxygen atoms (2 on each side) are equal.
The correct equation that has been balanced is option (c): ZnS + 02 -> 2ZnO + SO2. To determine whether an equation is balanced, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Let's analyze each option:
(a) 2ZnS + 302 -> 2ZnO + 2SO2: This equation is unbalanced because there are an unbalanced number of oxygen atoms (7 on the left side and 4 on the right side) compared to the amount of sulphur atoms (2 on each side).
(b) ZnS + 02 --> ZnO + SO2: This equation is unbalanced because there are an unbalanced number of oxygen atoms (2 on the left side and 3 on the right side) compared to the sulphur atoms (1 on each side).
(c) ZnS + 02 -> 2ZnO + SO2: This equation is balanced because the number of sulfur atoms (1 on each side) and the number of oxygen atoms (2 on each side) are equal. Therefore, option (c) is the only equation that has been balanced correctly.
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What is the PH of sebacic acid ?
Answers
Answer:
Sebacic acid is a naturally occurring dicarboxylic acid with the formula (CH2)8(CO2H)2. It is a white flake or powdered solid. Sebaceus is Latin for tallow candle, sebum is Latin for tallow, and refers to its use in the manufacture of candles.
Explanation:
pls mark as brainliest!!!!!
Given the reaction at equilibrium:
2NO2(g) → N204(g) Heat of
reaction is -55.3 kJ) What type of
reaction is this?
O Endothermic
O Exothermic
Answers
When the equilibrium constant is higher than one, it indicates that the reaction prefers to produce products, whereas if the equilibrium constant is less than one, it indicates that the reaction prefers to produce reactants. If the equilibrium constant is equal to one, the reaction proceeds in both directions equally.
In a chemical reaction, exothermic reactions are defined as reactions that release heat into their environment. It implies that heat is given off when reactants are converted to products. At equilibrium, an exothermic reaction continues to be exothermic, meaning that heat is given off even after the reaction reaches a state of equilibrium.There are two types of reactions: exothermic and endothermic.
A reaction is classified as exothermic if it releases heat, and endothermic if it absorbs heat. The direction of the reaction is determined by whether it is exothermic or endothermic. At equilibrium, the reaction is no longer moving forwards or backwards. It's also worth noting that reactions can be exothermic in one direction and endothermic in the other.
The equilibrium constant (K) is defined as the ratio of the concentration of products to the concentration of reactants in the chemical reaction equation. It is used to express how much of the products is generated by the reaction in comparison to the reactants. the equilibrium constant aids in the identification of the direction in which the reaction will proceed at equilibrium.
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A scientist combines chemicals and produces an exothermic reaction. What byproduct of this reaction would show that it is exothermic?
Answers
The by-product of an exothermic reaction that will show that the reaction is exothermic would be heat.
What is an exothermic reaction?An exothermic reaction is a reaction that generates energy which is released into the environment. In other words, an exothermic reaction is one in which the energy level of the reactants is higher than the energy level of the products of the reaction.
Exothermic reactions are complete opposites of endothermic reactions. In the latter, energy is released into the environment or reatants are at lower energy level than the products of the reactuons.
The energy being released or absorbed by exothermic and endothermic reactions is usually in the form of heat. Thus, for exothermic reactions, the reaction vessels are usually warm when felt while the reaction vessels for endothermic reactions are usually cold.
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How many atom and molecules of sulphur present in 64.0 g of sulphur
Answers
Answer:
1.2046*10^24 molecules
Answer:
1.506×1023 molecules
Explanation:
How many atoms and molecules of sulphur are present in 64.0 g of sulphur (S8)? ∴ 64 g of sulphur will contain=6.022×1023×64256=1.506×1023 molecules.
What is the mollusk tongue called?
B
Answers
Answer:
why
Explanation:
B is the answer to the question
Classify the following unbalanced chemical reaction Na3PO4(aq) + FecCl2(aq) = Fe3(PO4)2(s) + NaCl(aq)
1. Acid-Base Reaction
2. Precipitation Reaction
3. Oxidation-Reduction Reaction
4. Combustion Reaction
Answers
Answer:
2. Precipitation Reaction
Explanation:
Na3PO4(aq) + FecCl2(aq) = Fe3(PO4)2(s) + NaCl(aq)
Fe3(PO4)2(s) - solid, it means it will precipitate.
It is a precipitation reaction.
What is precipitate give example?A precipitate is a solid that forms out of a solution. A common example is that of the mixing of two clear solutions: (1) silver nitrate (AgNO3) and (2) sodium chloride (NaCl): The reaction is. The precipitate forms because the solid (AgCl) is insoluble in water.
What is precipitate formation?A precipitate is a solid formed in a chemical reaction that is different from either of the reactants. This can occur when solutions containing ionic compounds are mixed and an insoluble product is formed. The identity of the precipitate can often be determined by examining solubility rules.
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The complex ion Cu(NH3)42+ is formed in a solution made of 0.0200 M Cu(NO3)2 and 0.300 M NH3. What are the concentrations of Cu2+, NH3, and Cu(NH3)42+ at equilibrium? The formation constant*, Kf, of Cu(NH3)42+ is 1.70 × 1013.
Answers
The concentrations Cu(NH3)42+ at equilibrium is [Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4.
The concentrations of Cu2+ is [Cu(NH3)42+] + [Cu2+]
The concentrations of NH3 is 4[Cu(NH3)42+] + 4[NH3]
What is concentration equilibrium?Equilibrium concentration is described as a state when the rate of forward reaction in a chemical reaction becomes equal to the rate of backward reaction.
The equilibrium constant expression for the formation of the complex ion Cu(NH3)42+ is:
Kf = [Cu(NH3)42+] / [Cu2+] * [NH3]^4
where [Cu(NH3)42+], [Cu2+], and [NH3] are the molar concentrations at equilibrium.
The initial concentrations of Cu2+ and NH3 are 0.0200 M and 0.300 M respectively.
We have that Kf = 1.70 × 1013, we then rearrange the equation to solve for [Cu(NH3)42+]:
1.70 × 1013 = [Cu(NH3)42+] / (0.0200M) * (0.300M)^4
[Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4
Therefore at equilibrium, the concentration of Cu(NH3)42+ is [Cu(NH3)42+] = 1.70 × 1013 * (0.0200M) * (0.300M)^4
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\({ \red {\sf{Define \: Transportational}}}\)
2+x=19
Find x
Answers
Easy!!
2+17=19
#hope that helps
Answer:
To find the answer you may
2+17=19
Explanation:
so that is the answer I'm sorry,to not give all the solutions
Describe the fractionating column
Answers
Answer:
i dont see it
Explanation:
Answer:
A fractionating column or fractional column is an essential item used in the distillation of liquid mixtures to separate the mixture into its component parts, or fractions, based on the differences in volatilities.
Explanation:
The passage's author most vividly conveys the sense that Plumpp's poetry is like music when he
O uses words like "swing," "dance," and "sway" to characterize phrases in Plumpp's poems
O defines Plumpp as "the poet laureate of Chicago jazz and blues"
explains how long Plumpp has been writing about "Chicago jazz giants"
urges people to read Plumpp's poems and listen to the music Plumpp "immortalizes in print"
Answers
It is an amine, and it has less polar nitrogen-hydrogen and oxygen-hydrogen bonds.
A compound's boiling point is a physical characteristic. These intramolecular linkages between the molecules that make up a chemical affect these physical characteristics.
Alcohols and amino acids have the same kind of intermolecular linkages. The hydrogen bond is the name of this kind of bond.
The electrical attraction between a hydrogen atom from one molecule and an electronegative atom from a nearby molecule is known as a hydrogen bond.
The strength of the bond is in the following order: H.....F > H.....O > H......N
The H....N hydrogen bonds exist in amines, whereas the H....O hydrogen bonds exist in alcohols.
Consequently, the alcohol's hydrogen bonds are stronger and it will impart a higher boiling point on the compound.
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Answer:uses world like
Explanation:
Question 3(Multiple Choice Worth 3 points)
(01.02 LC)
What is the metric unit for mass?
O Meters
O Kilograms
O Pounds
O Matter
Answers
Answer:
kilograms
Explanation:
Answer:B) Kilograms
Explanation:I took the test and got it right!
g The heat capacity of a bomb calorimeter is: a negative quantity with units of kJ/mol a negative quantity with units of J/oC a positive quantity with units of kJ/mol a positive quantity with units of J/oC
Answers
Answer:
I believe it is a positive quantity such as water has 4.14 j/oC it is always positive it is the energy needed to raise the temperature by 1 degree celsius
Explanation:
What is the final temperature after 840 Joules is absorbed by 10.0g of water at 25.0
C?
Answers
The final temperature of the water is: T_final = 45.0°C
We can use the formula for the specific heat capacity of the water to solve this problem:
q = mcΔT
First, we can calculate the initial energy of the water:
q = mcΔT
q = (10.0 g) (4.184 J/g°C) (25.0°C)
q = 1,046 J
Next, we can calculate the final temperature after absorbing 840 J:
q = mcΔT
840 J = (10.0 g) (4.184 J/g°C) (ΔT)
ΔT = 20.0°C
Therefore, the final temperature of the water is:
T_final = T_initial + ΔT
T_final = 25.0°C + 20.0°C
T_final = 45.0°C
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When the following solutions are mixed together, what precipitate (if any) will form?
a. Hg(NO,)(ag) + CuSO (ag)
b. Ni(NO,)(ag) + CaCh(ag)
c. K;COg(ag) + Mgl.(ag)
d. Na;CrO.(ag) + AlBs(ag)
Answers
The precipitates that will be formed respectively from the reactions would be:
\(HgSO_4\)No precipitate \(MgCO_3\) \(Al_2 (CrO_4)_3\)What are precipitation reactions?Precipitation reactions are reactions during which two aqueous salt solutions combine to produce one aqueous and one insoluble salt.
Following this definition, the precipitates that will be formed from each of the reactions can be deduced as follows:
\(Hg_2(NO_3)(aq) + CuSO_4 (aq) --- > HgSO_4 (s) + CuNO_3 (aq)\). The precipitate here is \(HgSO_4\)\(Ni(NO_3)_2(aq) + CaCl_2(aq) --- > NiCl_2 (aq) + Ca (NO_3)_2 (aq)\). No precipitate is formed here.\(K_2CO_3(aq) + Mgl_2(aq)--- > KI (aq) + MgCO_3 (s)\). The precipitate formed here is \(MgCO_3\)\(Na_2CrO_4(aq) + AlBr_3(aq) --- > NaBr (aq) + Al_2 (CrO_4)_3 (s)\). The precipitate formed here is \(Al_2 (CrO_4)_3\)The production of precipitates follows solubility rules. Some of the rules are:
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What are the geometrical shape of BeCl2 and CO2?
Answers
Answer:Answer: BeCl2 And CO2 Both Molecules Have The Same - OOOOOOO Molecular Geometry (molecular Shape) Number Of Covalent Bonds To The Central Atom Total Number Of Each Type Of Bond (single, Double, Triple) Number Of Electron Pairs Around The Central Atom Electron Region Geometry (3-D Arrangement Of Electron Pair Regions
Explanation:
Omar wants to determine if the mass of a model rocket affects how long the rocket is able to stay up in the air. To do this, he constructs three identical rockets and then fills two of the rockets with varying amounts of sand to add mass. He then launches the rockets one at a time and times how long they are able to stay airborne.
What is the test variable (independent variable) in Omar's experiment?
A.
the materials out of which the rockets were made
B.
the time the rockets remain airborne
C.
the force with which each rocket is launched
D.
the masses of the model rockets
Answers
The test variable (independent variable) in Omar's experiment is the masses of the model rockets; option D.
What are the variables in an experiment?Variables in an experiment refer to those measurements or factors that are under the control of the researcher and which can be altered by the researcher in order to study the effect of changes on the study.
The three types of variables in a study are:
Independent variables Dependent variables Control variables or Constant variablesIn the study conducted by Omar, the test variable (independent variable) is the time of rocket stays up in the air.
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If there are 3.10 moles of O, how many moles of each of the compounds are present?
H2SO4
mol
C2H4O2
mol
NaOH
mol
Answers
Explanation:
The question pretty much requires us to find the amount of moles of each compounds based on the number of moles of O given.
H2SO4
1 mol of H2SO4 contains 4 mol of O
x mol of H2SO4 would contain 3.10 mol of O
x = 3.10 * 1 / 4 = 0.775 mol of H2SO4
C2H4O2
1 mol of C2H4O2 contains 2 mol of O
x mol of C2H4O2 would contain 3.10 mol of O
x = 3.10 * 1 / 2 = 1.55 mol of C2H4O2
NaOH
1 mol of NaOH contains 1 mol of O
x mol of NaOH would contain 3.10 mol of O
x = 3.10 * 1 / 1 = 3.10 mol of NaOH
1. The moles of \(H_2SO_4\) is 0.775 mol.
2. The moles of \(C_2H_4O_2\) is 1.55 mol.
3. The moles of \(NaOH\) is 3.10 mol.
Given:
Moles of O =3.10
Number of moles:It is defined as given mass over molar mass.\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\)1. Calculation for moles of \(H_2SO_4\):
1 mol of \(H_2SO_4\) contains 4 mol of O
x mol of \(H_2SO_4\) would contain 3.10 mol of O
x = 3.10 * 1 / 4 = 0.775 mol of \(H_2SO_4\)
2. Calculation for moles of \(C_2H_4O_2\) :
1 mol of \(C_2H_4O_2\) contains 2 mol of O
x mol of \(C_2H_4O_2\) would contain 3.10 mol of O
x = 3.10 * 1 / 2 = 1.55 mol of \(C_2H_4O_2\)
3.Calculation of moles of \(NaOH\) :
1 mol of \(NaOH\) contains 1 mol of O
x mol of \(NaOH\)would contain 3.10 mol of O
x = 3.10 * 1 / 1 = 3.10 mol of \(NaOH\)
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How can carbon dating be used to study the history of the earth?
Answers
convert 2.39 x 1022 molecules of water into moles of water
Answers
Answer:
\(0.0397\ \text{mol}\)
Explanation:
Number of molecules of water = \(2.39\times 10^{22}\)
\(N_A\) = Avogadro's number = \(6.022\times 10^{23}\ \text{mol}^{-1}\)
Number of moles is given by
\(\dfrac{2.39\times 10^{22}}{6.022\times 10^{23}}\)
\(=0.0397\ \text{mol}\)
The number of moles of water is \(0.0397\ \text{mol}\).
How many electrons occupy a filled 7s sublevel
Answers
Answer:f has 14 electrons in 7 sublevel orbitals,d has 10 electrons in 5 sublevel orbitals,p has 6 electrons in 3 sublevel orbitals,s has 2 electrons in 1 sublevel orbital.
Explanation:
Answer:
14 i think
Explanation:
i googled it