Answer:
The answer to your question is given below.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below below:
2C8H18 + 25O2 —> 16CO2 + 18H2O
From the balanced equation above,
2 moles C8H18 reacted to produce 18 moles of H2O.
Finally, we shall determine the number of moles of H2O produced by the reaction of 1.5 moles of C8H18. This can be obtained as follow:
From the balanced equation above,
2 moles C8H18 reacted to produce 18 moles of H2O.
Therefore, 1.5 moles of C8H18 will react to produce = (1.5 × 18)/2 = 13.5 moles of H2O.
Thus, 13.5 moles of H2O were obtained from the reaction.
chemistry question please help
Answer:
It was deflected by a magnet charged particles
How can Catastrophic Events impact Biodiversity ? I need a paragraph response. Also relate it to Biomes .
science
Answer:
Natural catastrophes, such as hurricanes, floods, fires or earthquakes, among others, are events generated by nature itself that negatively impact the ecosystem, causing damage to the environment and the species that inhabit it, including the humans. Thus, for example, fires seriously affect the ecosystems on which they develop, destroying the biodiversity of vegetation and fauna that inhabit there, which threatens large numbers of species and puts a limit on their development and reproduction.
Sunlight that reaches the earth is transformed into chemical energy in the form of
water
oxygen
carbon dioxide
sugar
Answer:
oxygen
Explanation:
I dont know if you still need it but here it is
Give the hybridization for the C in HCN. Give the hybridization for the C in HCN. sp3d2 sp3 sp2 sp sp3d
Answer:
The correct answer is - sp hybridization.
Explanation:
The molecular structure line with a carbon bound to the hydrogen with the single sigma bond and with 2 pi bond and one single sigma bond with carbon Nitrogen triple covalent bond.
To calculate the hybridization of an element like carbon by adding the sigma bond and the lone pair of that atom as here in HCN molecule, zero lone electrons and two sigmas bond the C atom includes sp-hybridized orbital.
The hybridization for the carbon (C) atom in HCN (hydrogen cyanide) is sp. Therefore, option D is correct.
The electron configuration of carbon is 1s² 2s² 2p², with four valence electrons. In HCN, carbon forms three sigma bonds: one with hydrogen (H) and two with nitrogen (N). The sigma bonds are formed by overlapping atomic orbitals.
In the process of hybridization, the carbon atom promotes one of its 2s electrons to a 2p orbital to create a set of four hybrid orbitals. In HCN, only three hybrid orbitals are involved in bonding. One sp hybrid orbital of carbon overlaps with the 1s orbital of hydrogen to form the C-H sigma bond. The other two sp hybrid orbitals of carbon overlap with two nitrogen atoms, forming the C-N sigma bonds.
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calculate the freezing point of a solution of 30 g methyl salicylate c7h6o2 dissolved in 800 g of benzene
Answer: The freezing point of the solution will be [tex]4.3^0C[/tex]
Explanation:
Depression in freezing point is given by:
[tex]\Delta T_f=i\times K_f\times m[/tex]
[tex]\Delta T_f=T_f^0-T_f=(5.5-T_f)^0C[/tex] = Depression in freezing point
i= vant hoff factor = 1 (for non electrolyte)
[tex]K_f[/tex] = freezing point constant = [tex]4.90^0C/m[/tex]
m= molality
[tex]\Delta T_f=i\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}[/tex]
Weight of solvent (benzene)= 800 g = 0.8 kg
Molar mass of solute ( methyl salicylate) = 152.1 g/mol
Mass of solute ( methyl salicylate) = 30 g
[tex](5.5-T_f)^0=1\times 4.90^0C/m\times \frac{30g}{152.1 g/mol\times 0.8kg}[/tex]
[tex](5.5-T_f)0C=1.2[/tex]
[tex]T_f=4.3^0[/tex]
The freezing point of the solution will be [tex]4.3^0C[/tex]
Ammonia ( NH3, MM 17.031 g/mol) and hypobromite ( OBr−) react according to the following chemical reaction. 2NH3+3OBr−⟶N2+3Br−+3H2O Suppose 0.325 g of ammonia reacts with 14.5 mL of a hypobromite solution. Calculate the concentration of the hypobromite solution.
Answer:
1.98 M
Explanation:
Step 1: Write the balanced reaction
2 NH₃ + 3 BrO⁻⟶ N₂ + 3 Br⁻ + 3 H₂O
Step 2: Calculate the moles corresponding to 0.325 g of ammonia
The molar mass of NH₃ is 17.03 g/mol.
0.325 g × (1 mol/17.03 g) = 0.0191 mol
Step 3: Calculate the reacting moles of hypobromite
The molar ratio of NH₃ to BrO⁻ is 2:3. The reacting moles of hypobromite are 3/2 × 0.0191 mol = 0.0287 mol
Step 3: Calculate the molar concentration of the hypobromite solution
M = 0.0287 mol / 0.0145 L = 1.98 M
The concentration of the hypobromite solution (BrO⁻) needed for the reaction is 1.97 M
We'll begin by calculating the number of mole in 0.325 g of NH₃. This can be obtained as follow:
Mass of NH₃ = 0.325 g
Molar mass of NH₃ = 17.031 g/mol
Mole of NH₃ =?Mole = mass / molar mass
Mole of NH₃ = 0.325 / 17.031
Mole of NH₃ = 0.01908 moleNext, we shall determine the number of mole of BrO⁻ needed to react with 0.01908 mole of NH₃. This can be obtained as follow:
2NH₃ + 3BrO⁻ —> N₂ + 3Br⁻ + 3H₂O
From the balanced equation above,
2 moles of NH₃ reacted with 3 moles of BrO⁻.
Therefore,
0.01908 mole of NH₃ will react with = [tex]\frac{0.01908 * 3 }{2}\\\\[/tex] = 0.02862 mole of BrO⁻.
Finally, we shall determine the concentration of the BrO⁻ solution.
Mole of BrO⁻ = 0.02862 mole
Volume of BrO⁻ solution = 14.5 mL = 14.5 / 1000 = 0.0145 L
Concentration of BrO⁻ =?Concentration = mole / Volume
Concentration of BrO⁻ = 0.02862 / 0.0145
Concentration of BrO⁻ = 1.97 MTherefore, the concentration of the hypobromite solution (BrO⁻) is 1.97 M
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Why is it important to keep your fingers and hands away from your face while cooking?
Answer:
To prevent the spread of germs.
Explanation:
Identify the reducing agent. 2 Al3+(aq) + 2 Fe(s) → 2 Al(s) + 3 Fe2+(aq)
Answer:
Al = Reduced (Oxidizing agent)
Fe = Oxidized (Reducing agent)
Explanation:
Al became less positive meaning that it gained an electron and Fe became more positive meaning that it lost elections. remember OIL RIG. Oxidation in loss of electrons and Reduction involves gain of electrons
Answer: The answer would be Fe.
Explanation: As "Fe" loses electrons, it becomes the reducing agent.
In a chemical reaction, two reactants mix. The resulting substance is called a(n) ________. A ionic bond B atomic bond C product D transitional metal
Answer:
product
Explanation:
Chemical reactions are said to be the formation of the products from the reactants. "In a chemical reaction, two reactants mix. The resulting substance is called a product." Thus, option C is correct.
What is a chemical reaction?A chemical reaction has been defined as the rearrangement of the atoms of the reactant molecules to result in new substances that differ in chemical properties and compositions. This results in the chemical transformation that results in product formation.
The products produced are new substances that are formed by the breaking or the combination of two or more reactants. The molecules of the reactant undergo collision that forms or breaks the bonds of the reactants.
The products produced are different in chemical properties and composition from the reactants it undergoes chemical changes. An example is iron rust, here iron undergoes oxidation to produce rust that is irreversible changes.
Therefore, option C. product is formed by mixing two or more reactants in a chemical reaction.
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A mixture of 14.0 grams of hydrogen, 84.0 grams of nitrogen, and 2.0 moles of oxygen are placed in a flask. When the partial pressure of the oxygen is 78.00 mm of mercury, what is the total pressure in the flask?
Total pressure in the flask : 468 mmHg
Further explanationDalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases
Can be formulated:
P tot = P1 + P2 + P3 ....
The partial pressure is the pressure of each gas in a mixture
For partial gas :
Pgas₁=x₁.P tot
x₁ = mole fraction of gas 1
mol of each gas :
H₂ = 14 g : 2 g/mol= 7 moles
N₂ = 84 g : 28 g/mol = 3 moles
O₂ = 2 moles
Total moles = 7+3+2= 12 moles
Partial pressure of O₂ :
[tex]\tt P_{O_2}=x_{0_2}\times P_{tot}\\\\78~mmHg=\dfrac{2}{12}\times P_{tot}\\\\P_{tot}=\dfrac{78\times 12}{2}=468~mmHg[/tex]
The study of chemicals is called chemistry.
The correct answer is 468mmhg.
Dalton's law defined as partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases
The formula is stated as follows:-
[tex]P_{total} = P_1 + P_2 + P_3...[/tex]
The partial pressure is the pressure of each gas in a mixture. For partial gas is as follows :
[tex]P_{gas}_1=X_1.P_{total}[/tex]
The [tex]X_1[/tex] defined as a mole fraction of gas 1
The mole of each gas is as follows:-
[tex]H_2 = \frac{14}{2}= 7 molesN_2 = \frac{84}{28} = 3 molesO-_2 = 2 moles[/tex]
Total moles = [tex]7+3+2= 12 moles[/tex]
The partial pressure [tex]O_2[/tex] is as follows:-
[tex]P_{total} = \frac{78*12}{2} =468mm[/tex].
Hence, the correct answer is 468mmhg.
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How many valence electrons must a potassium atom lose to obtain a complete valence shell?
two
three
one
four
When solid sodium hydroxide (NaOH) pellets are dissolved in water, the temperature of the water and beaker rises. This is an example of ________
Answer:
Exothermic Reaction
Explanation:
The increase in temperature is as a result of the release of energy due to the dissolving of the NaOH pellets in water. This is an example of exothermic reactions.
They are easy to identify as the surroundings of the system becomes hot due to the release of the energy.
1. When an object wants to stay at rest or wants to stay in motion unless
an outside force comes and disturbs it.*
Compare the planets Earth and Neptune. Describe how are they different from each other.
the planets Earth and Neptune
Answer:
Neptune is 34 times bigger than Earth.
Earth has life, Neptune does not.
Neptune is a gas planet, Earth is not.
Neptune has rings, Earth does not.
Neptune has 13 moons, Earth has 1.
Explanation:
The planets Earth and Neptune are different from each other as Neptune is 34 times bigger than Earth.Earth has life, Neptune does not.Neptune is a gas planet, Earth is not.Neptune has rings, Earth does not.
What is a planet?A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a protoplanetary disk.
Planets grow in this disk by the gradual accumulation of material driven by gravity, a process called accretion. The Solar System has at least eight planets: the terrestrial planets Mercury, Venus, Earth and Mars, and the giant planets Jupiter, Saturn, Uranus and Neptune.
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which reactant gets completely used up if 22.22 grams of fluorine gas reacts with 22.22 grams of chromium iii
Answer:
Chromium (III) bromide.
Explanation:
Hello.
In this case, for the reaction:
[tex]3F_2+2CrBr_3\rightarrow 3Br_2+2CrF_3[/tex]
Since there is a 3:2 mole ratio between fluorine (molar mass = 38.0 g/mol) and chromium (III) bromide (molar mass = 291.7 g/mol) we can compute the available moles of fluorine and the moles of fluorine consumed by 22.22 g chromium (III) bromide in order to realize whether it is the limiting reactant or not:
[tex]n_{F_2}^{available}=22.22gF_2*\frac{1molF_2}{38.0gF_2}=0.585molF_2\\ \\n_{F_2}^{consumed}=22.22gCrBr_3*\frac{1molCrBr_3}{291.7gCrBr_3}*\frac{3molF_2}{2molCrBr_3} =0.114molF_2[/tex]
In such a way, since just 0.114 off 0.585 moles of fluorine are consumed, we conclude it is in excess and the chromium (III) bromide is the limiting reactant, it means it gets completely used up.
Best regards!
Which element is a nonmetallic liquid at room
temperature?
(1) hydrogen
(2) oxygen
(3) mercury
(4) bromine
Answer:
According to my research there are 2 answers present.
Explanation:
Bromine as well as mercury is a nonmetallic liquid at room temperature
How many hours will it take to fill a cubic vat of 18.7 fit edge length that has a density of 1.49 g/mL and is spilling at a rate of 3.85kg/s?
Answer:
It will take 19.9 hours to fill the cubic.
Explanation:
First, we can find the volume of the cubic.
[tex]V_{c}=18.7^{3}ft^{3}=6539.2 ft^{3}=1.85*10^{8} ml[/tex]
Let's multiple this volume times the density
[tex]V_{c}*\rho=1.85*10^{8} ml * 1.49 g/ml = 2.76*10^{8} g[/tex]
If we divide the spilling rate by V times density we will have:
[tex]t=\frac{V_{c}}{\rho R}=2.76*10^{5} kg/3.85kg/s=71688.3 s = 19.9 h[/tex]
Therefore, it will take 19.9 hours to fill the cubic.
I hope it helps you!
The study of chemicals and bonds is called chemistry. when the amount reactant and the product is equal is said to be equilibrium.
The correct answer is 19.9h.
What is density?The density, of a substance is its mass per unit volume.The formula used to solve the question is as follows:-
[tex]D= \frac{M}{V}[/tex]
The data is given as follows:-
[tex]V = 1.85*10^8\\[/tex]The density of the is as follows:-
[tex]V*D =1.85*10^8 *1.49 =2.76*10^8[/tex]
Hence, the time will be as follows:-
[tex]t=\frac{V_c}{Dr}\\ \\=\frac{2.76*10^5}{3.85} \\ = 71688.3s\\=19.9h[/tex]
Hence, the correct time is 19.9h.
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The major advantage of using ground glassware ( round bottom flask, distillation condenser, thermometer adapter, separatory funnel) in the organic lab is
Answer:
The major advantage of using ground glassware in the organic chemistry laboratory is that the joints can quickly and easily fit to other apparatus so that various reactions can be conducted from these various assembling of apparatuses.
Explanation:
Ground glass is glass whose polished surface has been ground to produce a rough finish.
Most organic chemistry laboratory glasswares are designed with ground glass joints. The joints are leak-tight and have outer (female) and inner (male) joints that can be tightly connected together.
These glassware are very important in the organic chemistry laboratory because they can be assembled and disassembled for various reactions conducted in the laboratory without having to have a specific custom-made glassware for each reaction or synthesis process performed in the laboratory. For example, a Liebig condenser can be used for various distillation reactions in the laboratory due to its joint that can be fitted to other apparatus in these reactions.
Also, ground glassware joints are chemical resistant and heat resistant unlike corks or rubber bungs and glass tubes.
Use the balanced chemical equation to calculate the grams of HF that need to react with 4.44 g of SnF2. Express the mass in grams to three significant figures.
Answer:
Explanation:
SnF₂ + 2HF = H₂Sn + 4F
mol weight of SnF₂ = 156.7
mol weight of HF = 20
156.7 gram of SnF₂ reacts with 40 grams of HF
4.44 gram of SnF₂ reacts with 40 x 4.44 / 156.7 grams of HF
= 1.13 grams of HF .
Which theory describes the way atoms are arranged within a molecule?
A. The scientific theory
B. The VSEPR theory
C. The Bohr atomic model
D. The atomic theory
Answer:
B. The VSEPR theory
Explanation:
The valence shell electron pair repulsion theory describes the way in which atoms are arranged within a molecule.
If an atom is bonded to two or more other kinds of atoms as in many covalent molecules and ions, the shape of the system is determined by the geometry of the bonds around the central atom. The variations in the bond angles of such molecules and ions can be explained by the valence shell electron pair repulsion model and hybridization. All electron pairs will orient themselves in such a way as to minimize the electrostatic repulsion between them.Answer:
B
Explanation:
The VSEPR theory
Which solution contains the fewest total ions?
400. mL of 0.10 M NaCl
300. mL of 0.10 M CaCl2
200. mL of 0.10 M FeCl3
800. mL of 0.10 M C4H10
name the gas that is largely responsible for the acid rain phenomena
Answer:
sulfur dioxide
Explanation:
Calculate the mass of water that can be vaporized with 1250 calories of energy.
Answer:
2.31 g
Explanation:
Step 1: Given data
Energy added to vaporize the water (Q): 1250 calStandard enthalpy of vaporization of water (ΔH°vap): 540 cal/gMass of water (m): ?Step 2: Calculate the mass of water that can be vaporized with 1250 calories of energy
We will use the following expression.
Q = ΔH°vap × m
m = Q/ΔH°vap
m = 1250 cal/(540 cal/g)
m = 2.31 g
Which statement best describes the movement of winds
An analysis shows that 2.97 g of iron metal combines with oxygen to form 4.25 g of an oxide of iron. What is the empirical formula of the compound
The empirical formula of the compound obtained when 2.97 g of iron combined with oxygen to produce 4.25 g of iron oxide is Fe₂O₃
We'll begin by calculating the mass of oxygen in compound.Mass of Fe = 2.97 g
Mass of compound = 4.25 g
Mass of O =?Mass of O = (Mass of compound) – (Mass of Fe)
Mass of O = 4.25 – 2.97
Mass of O = 1.28 gFinally, we shall determine the empirical formula of the compound. This can be obtained as follow:Fe = 2.97 g
O = 1.28
Divide by their molar mass
Fe = 2.97 / 56 = 0.053
O = 1.28 / 16 = 0.08
Divide by the smallest
Fe = 0.053 / 0.053 = 1
O = 0.08 / 0.053 = 1.5
Multiply by 2 to express in whole number
Fe = 1 × 2 = 2
O = 1.5 × 2 = 3
Therefore, the empirical formula of the compound is Fe₂O₃
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Considering the definition of empirical formula,
The empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms, that is, the subscripts of chemical formulas are reduced to the most integers. small as possible.
In this case, in first place you know:
Mass of iron= 2.97 gMass of compound= 4.25 gMass of oxygen= (Mass of compound) – (Mass of Fe)= 4.25 g - 2.97 g= 1.28 gThen, you need to express the mass into percentage as follow:
Iron (Fe): [tex]\frac{2.97 grams}{4.25 grams}x100=[/tex] 69.88% Oxygen (O): [tex]\frac{1.28 grams}{4.25 grams}x100=[/tex]30.12%
Assuming a 100 grams sample, the percentages match the grams in the sample. So you have 69.88 grams of iron and 30.12 grams of oxygen.
Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:
Iron (Fe): [tex]\frac{69.88 grams}{55.85\frac{grams}{mole} }=1.25 moles[/tex] Oxygen (O): [tex]\frac{30.12 grams}{16 \frac{grams}{mole} }=1.88 moles[/tex]The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:
Iron (Fe): [tex]\frac{1.25 moles}{1.25 moles}=1[/tex] Oxygen (O): [tex]\frac{1.88 moles}{1.25 moles}= 1.5[/tex]
Finally all coefficients are multiplied by a whole number to ensure that the smallest proportion of whole number subscripts is obtained. In this case, it is multiplied by 2:
Iron (Fe): 1×2= 2 Oxygen (O): 1.5×2= 3Therefore the Fe : O mole ratio is 2:3
Finally, the empirical formula is Fe₂O₃.
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Answer:
5.720 m
Explanation:
Step 1: Given data
Mass of ammonium chloride (solute): 153.0 gMass of DI water (solvent): 500.0 gStep 2: Calculate the moles of solute
The molar mass of ammonium chloride is 53.49 g/mol.
153.0 g × (1 mol/53.49 g) = 2.860 mol
Step 3: Calculate the kilograms of solvent
We will use the relationship 1 kg = 1000 g.
500.0 g × (1 kg/1000 g) = 0.5000 kg
Step 4: Calculate the molality of the solution
m = 2.860 mol / 0.5000 kg = 5.720 m
How much work (in J) is required to expand the volume of a pump from 0.0 L to 2.2 L against an external pressure of 1.2 atm
Answer:
267.498 J is required to expand the volume of a pump from 0.0 L to 2.2 L against an external pressure of 1.2 atm
Explanation:
The volume change work of a gas is the work necessary for the gas to go from an initial volume Vi to a final volume Vf. If the volume decreases, the gas will have been compressed and it is a compression work; whereas if the volume increases, the gas will have expanded and it is expansion work.
The work is calculated by:
W= - P*ΔV= -P*(Vfinal - Vinitial)
In this case:
W= ?P= 1.2 atm= 121590 [tex]\frac{N}{m^{2} }[/tex] (being 1 atm= 101325[tex]\frac{N}{m^{2} }[/tex] )ΔV= Vfinal - Vinitial= 2.2 L - 0 L= 2.2 L= 0.0022 m³ (being 1 L=0.001 m³)Replacing:
W= -121590 [tex]\frac{N}{m^{2} }[/tex]*0.0022 m³= - 267.498 N*m= -267.498 J
267.498 J is required to expand the volume of a pump from 0.0 L to 2.2 L against an external pressure of 1.2 atm
The work require to expand the volume of the given pump is 267.5 J.
The given parameters;
initial volume of the gas, V₁ 0.0 Lfinal volume of the gas, V₂ = 2.2 Lexternal pressure, P = 1.2 atmThe work require to expand the volume of the given pump is calculated as follows;
W = PΔV
W = 1.2 atm (2.2 L - 0 L)
W = 2.64 atm.L
[tex]W = 2.64 \ atm.L \times \frac{101325 \ Pa}{1 \ atm} \times \frac{0.001 \ m^3}{1 \ L} \\\\W = 267.5 \ J[/tex]
Thus, the work require to expand the volume of the given pump is 267.5 J.
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The molecular mass of propanoic acid is 74.1 amu . Calculate the molecular mass of methyl ethanoate, an isomer of propanoic acid.
Answer:
74.1 amu
Explanation:
Given that,
The molecular mass of propanoic acid is 74.1 amu.
One of the isomer of propanoic acid is methyl ethanoate.
We know that, isomers are have same molecular formula. They also have same mass.
In this case, it is very clear that the molecular mass of methyl ethanoate is as same as molecular mass of propanoic acid i.e. 74.1 amu
True or False: Secondary succession occurred in The Lorax
Answer:
true
Explanation:
the way the place grew back to life my g
Answer:
True
Explanation:
Secondary succession is when a terrain grows again after it's been destroyed.
During which change of state do atoms lose energy?
A. sublimation
B. freezing
C. boiling
D. melting
Answer:
B. freezing
Explanation:
During freezing, atoms lose energy. In this process, the molecules lose heat energy and they cool down. This reduces randomness of the matter.
In sublimation, heat is added to a matter, the molecules are agitated and their entropy increases. Boiling and melting are similar in that these processes heat is supplied. Then the particles are agitated and the molecules will tend to move apart more rapidly.Answer:
B)Freezing
Explanation:
just took the test edge 2021