Answer:
The fraction remaining of a sample that is 5 half lives old is 0.03125.
Explanation:
It is known that the decay of a radioactive isotope isotope obeys first order kinetics.Half-life time is the time needed for the reactants to be in its half concentration.If reactant has initial concentration [A₀], after half-life time its concentration will be ([A₀]/2).Also, it is clear that in first order decay the half-life time is independent of the initial concentration.Suppose the initial concentration of the sample is 1:So, it will decay as:
1.0 → (first half life) 0.5 → (second half-life) 0.25 → (third half-life) 0.125 → (fourth half-life) 0.0625 → (fifth half-life) 0.03125.
So, the rraction remaining of a sample that is 5 half lives old is 0.03125.
Use C8H18 as the formula for gasoline and 0.71g/mL as its density. If a car gets 31.2 miles per gallon, what volume of CO2 measured at 28°C and 732 torr is produced on a trip of 235 miles? Assume complete combustion of gasoline.
Answer:
[tex]\boxed{\text{4.5 m}^{3}}[/tex]
Explanation:
Step 1. Calculate the volume of gasoline used.
[tex]V = \text{235 mi} \times \dfrac{\text{1 gal}}{\text{31.2 mi}} \times \dfrac{\text{3.875 L}}{\text{1 gal}} = \text{28.51 L}[/tex]
Step 2. Calculate the moles of octane used.
[tex]n = \text{28.51 L} \times \dfrac{\text{1000 mL}}{\text{1 L}} \times \dfrac{\text{0.71 g}}{\text{1 mL}} \times \dfrac{\text{1 mol}}{\text{114.23 g}} = \text{177 mol}[/tex]
Step 3. Calculate the moles of CO₂ formed
C₈H₈ + 10O₂ ⟶ 8CO₂ + 4H₂O
n/mol: 177
[tex]n = \text{177 mol C$_8$H$_8$} \times \dfrac{\text{8 mol CO$_2$}}{\text{1 mol C$_8$H$_8$}} = \text{1420 mol CO$_2$}[/tex]
Step 4. Calculate the volume of CO₂
[tex]p =\text{732 torr} \times \dfrac{\text{1 atm}}{\text{760 torr}} = \text{0.9632 atm}[/tex]
R = 0.082 06 L·atm·K⁻¹mol⁻¹
T = 28 °C = 301.15 K
[tex]pV = nRT\\\\V = \dfrac{nRT}{p}\\\\V =\dfrac{177 \times 0.08206 \times 301.15}{0.9632} = \text{4500 L = 4.5 m}^{3}\\\\\text{The volume of CO$_2$ released is }\boxed{\textbf{4.5 m}^{\mathbf{3}}}[/tex]
The amino acids are combinations of
ketones and alcohol
organic acid and amines
organic acid and esters
esters and aldehydes
Answer: The correct answer is: [B]:
_________________________________________________
" organic acid and amines " .
_________________________________________________
Note: Choice B: "organic acid and amines" ;
is the only answer choice that contains "amines" (hint: amino acid / amine) ; which are "proteins" .
As such; Choice "B" is the only correct answer choice.
_____________________________________________________
Hope this helps!
Best wishes to you!
_____________________________________________________
Answer: option B
Explanation:
Amino acids have both COOH and NH2 groups.
Example, Glycine -NH2CH2COOH
Hence amino acids are the combination of organic acids and amine.
Amino acids are building blocks of proteins.
what is the name of this hydrocarbon?
Answer:
Pentane
Explanation:
Which type of reaction occurs in the following equation?
3CIO (aq) →→ CIO, (aq) + 2Cl(aq)
an oxidation reaction
a reduction reaction
a synthesis reaction
a disproportionation reaction
Answer:
The right choice is → a reduction reaction
Explanation:
From the balanced equation
3CIO⁻₍aq₎ → CIO⁻ ₍aq₎ + 2Cl⁻ ₍aq₎we can calculate the change in oxidation number of Cl in reactant and product
in reactant ClO⁻
let x= oxidation number of Cl
and oxidation number of oxygen in its compound is (-2)
and the total charge on the ClO⁻ ion = -1
∴x + (-2) = -1 →→→ x = +1in product Cl⁻
let x= oxidation number of Cl
and the total charge on the Cl⁻ ion = -1
∴x = -1so the oxidation number of Cl decreases from +1 in reactant to -1 in product so it is reduction reaction.
But, disproportionation reaction is defined as the chemical reaction in which a single substance gets reduced as well as oxidized.
For a disproportionated substance , it should contain at least three oxidation states. which isn't the case here.
So, the right choice is:
→ a reduction reaction
Answer:
disproportionation reaction
Explanation:
describe the physical properties of metals, non metals, and metalloids
Metals- • Lustrous (shiny)
• Good conductors of heat and electricity.
• High melting point.
• High density (heavy for their size)
• Malleable (can be hammered)
• Ductile (can be drawn into wires)
• Usually solid at room temperature (an exception is mercury)
• Opaque as a thin sheet (can't see through metals)
Non-metal- • High ionization energies.
• High electronegativities.
• Poor thermal conductors.
• Poor electrical conductors.
• Brittle solids—not malleable or ductile.
• Little or no metallic luster.
• Gain electrons easily.
• Dull, not metallic-shiny, although they may be colorful.
Metalloid-Are generally solids
Can be shiny or dull (luster)May or may not be drawn into wire (ductile)May or may not be hammered flat (malleable)May or may not be brittleConduct heat and electricity better than nonmetals, but not as well as metals Tend to make good semiconductorsHave boiling points that are widely variedHave melting points that are widely variedHave densities that are widely variedMetals are lustrous, malleable, ductile, good conductors of heat and electricity,Non-metals are brittle, dull, and poor conductors of heat and electricity,Metalloids they are shiny, brittle solids with intermediate to relatively good electrical conductivity and the electronic band structure of a semimetal or semiconductor.
What are Metal,Non-metal and Metalloids?Metals are generally shiny, malleable, and hard. Metals are also good conductors of electricity.Non-metals do not conduct heat or electricity very well. Metalloids share characteristics of both metals and non-metals and are also called semimetals.Metals are lustrous, malleable, ductile, good conductors of heat and electricity,Non-metals are brittle, dull, and poor conductors of heat and electricity,Metalloids they are shiny, brittle solids with intermediate to relatively good electrical conductivity and the electronic band structure of a semimetal or semiconductor.
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Which of the following is true about homogeneous mixture
Homogenous mixtures are known as solutions. Option A
Homogeneous mixtures are indeed known as solutions. In a homogeneous mixture, the components are uniformly distributed, creating a single-phase system.
This means that the composition of the mixture is uniform throughout, and there are no visible boundaries between the different components. Solutions can exist in various states of matter, including liquids, gases, and solids, depending on the nature of the substances involved.
Option B is incorrect because homogeneous mixtures consist of a single phase, not multiple phases.
Option C is incorrect because the composition of homogeneous mixtures can vary, although it remains uniform at any given point within the mixture.
Option D is incorrect because homogeneous mixtures can exist in different states, not just as liquids.
The full question: Which of the following is true about homogeneous mixtures
A. They are known as solutions
B. The consist of two or more phases
C. They have compositions that never vary
D. They are always liquids.
Fossil fuel combustion increases the acidity of rain because
A. sulfuric acid and nitric acid dissolve in rainwater
B. tiny particles of carbon dissolve in rainwater
C. carbon dioxide dissolves in rainwater
D. sulfur dioxide and nitrogen oxides dissolve in rainwater
Answer:
D. sulfur dioxide and nitrogen oxides dissolve in rainwater
Explanation:
Sulfur dioxide and nitrogen oxides are by products of fossil fuel combustion. The bulk of these gases are released into the atmosphere. When these gases gets to the atmosphere, they combine with rain water to form acid rain.
The oxides, sulfur dioxde and nitrogen oxides are non-metallic oxides. They are acid oxides that combines with water to produce an acid.
Burning of fossil fuels release these gases and they combine with rain water to form acid rain.
Acid rain is very corrosive and greatly affects the ecosystem.
What is the molarity of a solution that contains 122g of MgSO4 n 3.5L of solution?
Answer:
0.29mol/L or 0.29moldm⁻³
Explanation:
Given parameters:
Mass of MgSO₄ = 122g
Volume of solution = 3.5L
Molarity is simply the concentration of substances in a solution.
Molarity = number of moles/ Volume
>>>>To calculate the Molarity of MgSO₄ we find the number of moles using the mass of MgSO₄ given.
Number of moles = mass/ molar mass
Molar mass of MgSO₄:
Atomic masses: Mg = 24g
S = 32g
O = 16g
Molar mass of MgSO₄ = [24 + 32 + (16x4)]g/mol
= (24 + 32 + 64)g/mol
= 120g/mol
Number of moles = 122/120 = 1.02mol
>>>> From the given number of moles we can evaluate the Molarity using this equation:
Molarity = number of moles/ Volume
Molarity of MgSO₄ = 1.02mol/3.5L
= 0.29mol/L
IL = 1dm³
The Molarity of MgSO₄ = 0.29moldm⁻³
9. What is the reason that BIGGER isotopes tend to be unstable, and thus, radioactive?
Answer:
Explanation:
Too many protons causes the nucleus to be unstable, thus making the isotope radioactive
At constant temperature, 534 mL of a gas at 894 torr is compressed to 167 mL What is the new pressure in atmospheres?
Answer:
3.762 atm.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and T are constant, and have different values of P and V:(P₁V₁) = (P₂V₂)
Knowing that:
P₁ = 894.0 torr, V₁ = 534.0 mL,
P₂ = ??? torr, V₂ = 167.0 mL.
Applying in the above equation(P₁V₁) = (P₂V₂)
∴ P₂ = (P₁V₁)/V₂ = (894.0 torr)(534.0 mL)/(167.0 mL) = 2859 torr.
To convert from torr to atm:1.0 atm = 760.0 torr.
∴ P₂ = (2859 torr)(1.0 atm/760 torr) = 3.762 atm.
How much chlorine should be produced if 84.2 grams of aluminum chloride and 68.4 grams bromine are combined? 2AlCl3 + 3Br2 —> 3AlBr3 + 2Cl2
Answer:
20.27 g.
Explanation:
From the balanced reaction:2AlCl₃ + 3Br₂ → 3AlBr₃ + 2Cl₂,
2.0 mole of AlCl₃ reacts with 3.0 moles of Br₂ to produce 3.0 mole of AlBr₃, and 2.0 mole of Cl₂.
We need to calculate the no. of moles of (84.2 g) of AlCl₃ and (68.4 g) of Br₂:no. of moles of AlCl₃ = mass/molar mass = (84.2 g)/(133.34 g/mol) = 0.6315 mol.
no. of moles of Br₂ = mass/molar mass = (68.4 g)/(159.808 g/mol) = 0.4288 mol.
AlCl₃ reacts with Br₂ with (2: 3) molar ratio,
So, 0.2859 mole (the remaining is in excess) reacts completely with 0.4288 mole of Br₂.
Using cross multiplication:
2.0 moles of AlCl₃ produce → 2.0 moles of Cl₂.
∴ 0.2859 mole of AlCl₃ produce → 0.2859 mole of Cl₂.
∴ The amount of Cl₂ produced = no. of moles x molar mass = (0.2859 mol)(70.906 g/mol) = 20.27 g.
Final answer:
To determine the amount of chlorine produced from 84.2 grams of aluminum chloride and 68.4 grams of bromine, we calculate that approximately 20.56 grams of chlorine gas would be produced, considering bromine as the limiting reactant.
Explanation:
The question: How much chlorine should be produced if 84.2 grams of aluminum chloride and 68.4 grams of bromine are combined? Firstly, we need to convert the mass of the reactants to moles using their molar mass. The molar mass of aluminum chloride (AlCl₃) is approximately 133.34 g/mol and that of bromine (Br₂) is about 159.808 g/mol. Therefore, 84.2 grams of AlCl₃ equals 0.63 mol and 68.4 grams of Br₂ equals 0.43 mol.
According to the balanced chemical equation 2AlCl₃ + 3Br₂ → 3AlBr₃ + 2Cl₂, two moles of AlCl₃ react with three moles of Br₂ to produce two moles of Cl₂. Thus, the theoretical yield of Cl₂ can be determined based on the limiting reactant. Given the ratio, Br₂ is the limiting reactant as it would require 0.84 moles of AlCl₃ to fully react with 0.43 moles of Br₂. Since 0.43 moles of Br₂ only reacts with 0.29 moles of AlCl₃ to produce chlorine, by the stoichiometry of the reaction, this would yield 0.29 moles of Cl₂.
The mass of Cl₂ produced can then be calculated as mass = moles × molar mass of Cl₂ (70.90 g/mol), giving approximately 20.56 grams of chlorine gas. This estimation provides an understanding of stoichiometry and the limiting reactant concept in chemical reactions.
35.6Ml of an HBr solution were tirated with 18.2 ml of a 0.115M naoh solution to reach equivance point. what is the molarity of the hbr solution
Answer:
0.058 M
Explanation:
HBr reacts with NaOH and forms NaBr and H₂O as the products. The balanced equation is as follows:
[tex]NaOH + HBr \implies NaBr + H_2O[/tex]
Molarity (M) = moles of solute (mol) / volume of the solution (L)
Molarity of NaOH = 0.115 M
Volume of NaOH = 18.2 mL = 18.2 x 10⁻³ L
So, moles of NaOH = molarity x volume of the solution
= 0.115 M x 18.2 x 10⁻³ L
= 2.093 x 10⁻³ mol
From the equation, we can see that the ratio between NaOH and HBr is 1 : 1.
Therefore, moles of HBr in 35.6 mL = moles of NaOH added = 2.093 x 10⁻³ mol
Hence, molarity of HBr = 2.093 x 10⁻³ mol / 35.6 x 10⁻³ L = 0.058 M
0.0588
This is what I got, and my online school curriculum said it was correct.
.
An alkane reacts with a halogen to form a halocarbon. What is the role of UV light in this reaction?
It provides energy for the reaction.
It is released by the reaction.
It catalyzes the reaction.
PLEASE EXPLAIN YOUR ANSWER
Answer:
It provides energy for the reaction.
Explanation: gradpoint
UV light provides the necessary energy to initiate the halogenation reaction between an alkane and a halogen by causing the homolysis of halogen molecules, enabling the formation of halocarbons like methyl chloride.
An alkane reacts with a halogen to form a halocarbon, and the role of UV light in this reaction is to provide energy for the reaction. This is necessary because the initiation step in the halogenation of alkanes involves the homolysis of halogen molecules like chlorine (Cl₂) into two reactive chlorine radicals. The energy from UV light is enough to overcome the energy barrier for this bond cleavage, allowing the reaction to proceed. In the absence of UV light, the mixture of an alkane such as methane (CH₄) and chlorine will not react at room temperature. During the reaction, for instance, chlorine reacts with excess methane to give methyl chloride (CH₃Cl), and the presence of ultraviolet light is crucial for this transformation to take place.
the elements carbon, nitrogen, and oxygen are all part of the same _____ on the periodic table. A)diagonal B)row C)group D)period
Answer:
D. Period
Explanation:
In the periodic table, elements are arranged by rows and columns. Rows are called periods, and columns are called groups. If you look at the periodic table below, you will see that Oxygen, Carbon, and Nitrogen are all in separate columns, so they are not in the same group. However, when you look at them by row, they fall in the same line. This means that they belong in the same period.
They fall in period 2.
Final answer:
Carbon, nitrogen, and oxygen are all elements found in the same period (period 2) (option D) on the periodic table, as they are all located in the second row from the top.
Explanation:
The elements carbon, nitrogen, and oxygen are all part of the same period on the periodic table. These elements are found in period 2 because they are in the second row, which is numbered according to the increasing atomic number from left to right. The periodic table is structured with horizontal rows known as periods and vertical columns known as groups. Elements in the same period have the same number of electron shells, which is why carbon, nitrogen, and oxygen can be found together in period 2, despite having different group numbers.
For the question asked, the correct answer is D) period. Knowing the arrangement of the periodic table helps in understanding how the periodicity of the elements influences their chemical properties and behavior in reactions. Oxygen, for instance, belongs to Group 16 (6A), which indicates that it has six valence electrons, like the other elements in that group, as do carbon in Group 14 (4A) and nitrogen in Group 15 (5A).
How do coefficients of reactants and products from the balanced
chemical equation of a reaction at equilibrium appear in the equation
of the equilibrium constant?
a. as coefficients
b. as exponents
c. as fractions
d. They do not appear.
Coefficients or reactants and products from the balanced chemical equation of a reaction at equilibrium appear as a coefficient.
What are some uses of the mineral gypsum? Select 2 choices
Answer:
[tex]\boxed{\text{fertilizer, wallboard, and plaster of Paris}}[/tex]
Explanation:
There are three uses of gypsum in your list.
1. Fertilizer
Gypsum is a source of the essential plant nutrients, Ca and S. It has been used as a fertilizer for more than 250 yr.
2. Wallboard
Much of the gypsum produced by flue gas desulfurization is used in the wallboard industry.
3. Plaster of Paris
Plaster of Paris is produced by heating gypsum to about 150 °C.
CaSO₄·2H2O ⟶ CaSO₄·0.5H₂O + 1.5H₂O
When the dry powder is mixed with water, it re-forms into gypsum.
So, three uses of gypsum are in [tex]\boxed{\textbf{fertilizer, wallboard, and plaster of Paris}}[/tex].
The two uses of gypsum are Wallboard and Plaster of Paris.
What is gypsum?Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO₄·2H₂O.
There are two uses of gypsum are as follows:
1. Wallboard
Due to its inherent fire resistance, gypsum board, commonly known as drywall is the premier building material for wall, ceiling, and partition systems.
2. Plaster of Paris
Plaster of Paris is produced by heating gypsum to about 150 °C.
CaSO₄·2H2O ⟶ CaSO₄·0.5H₂O + 1.5H₂O
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What is a goal of the planned mission MIRI?
A. to land on the moon
B. to explore the Kupier Belt
C. to explore the moon of Jupiter
D. to examine asteroids near Mars
Answer Please
Answer:
to explore the Kupier Belt
Explanation:
just finished the test
Goal of the planned mission MIRI is "to explore the Kupier Belt".
Explanation:
MIRI, Mid-infrared Instrument, was designed to play an important role in NASA's "James Webb Space Telescope"(JWST).This is a joint project involving the Space Agency Europe and Canada. This telescope is designed to bring the images of stars and galaxies in infrared light. This grasps a wavelength of 5 to 28 microns. It also has a sensitive dectector allowing to see the red shifted light, stars that are newly formed and the comet that are blur.
Also, to explore the Kuiper belt that is located in the outer solar system that extends from the Neptune to sun. It is believed to be similar to asteroid belt but 20 times broad and 200 times massive than it.
Which of the elements shown has an atomic mass of 20 amu?
Neon has atomic mass of 20
Answer:
they are right its neon but i have the same questions so just search up "neon bohr modle" so you know which answer it is.
Explanation:
How many quarters are in $500
Answer:
[tex]\boxed{2000}[/tex]
Explanation:
[tex]\text{4 quarters = \$1}\\\\\text{No. of quarters} = \text{\$500} \times \dfrac{\text{4 quarters}}{\text{\$1}} = \boxed{\textbf{2000 quarters}}[/tex]
What is the formula for calcium fluoride
Answer:
[tex]CaF_{2}[/tex]
Explanation:
Calcium = Ca
Fluorine = F
Answer:
CaF2
Explanation:
What is the force of attraction that holds atoms together?
Strong chemical bonds are the intramolecular forces that hold atoms together in molecules. A strong chemical bond is formed from the transfer or sharing of electrons between atomic centers and relies on the electrostatic attraction between the protons in nuclei and the electrons in the orbitals.
mark me brainliest please!
The atoms are primarily held together by strong nuclear forces and electromagnetism. The strong nuclear force binds the particles in the nucleus, while electromagnetism acts on a larger scale, holding atoms together, especially in covalent bonds. Other forces like dispersion forces also play a role when molecules are very close.
Explanation:Atoms are held together by a few different forces, with the main two being the strong nuclear force and electromagnetism. The strong nuclear force keeps the particles of the nucleus, the nucleons, tightly bound together. This force is very strong, but it falls to zero over a distance of only 10-¹5 meters.
On the other hand, electromagnetism, which includes both magnetic and electrical forces, holds the atoms together at a larger scale. These forces occur between the positive charge of the atomic nucleus and the negatively charged electrons surrounding it. This is especially evident in covalent bonds where pairs of atoms share electrons.
Another type of force, although weaker, are dispersion forces that develop between atoms in different molecules when the molecules are very close.
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Why would a pendulum stop swinging? Where did the energy go?
Answer:
The pendulum would stop swinging because the kinetic energy would slow down for the friction is causing it to slow. The energy would go into potential energy.
Answer:
friction/heat
Explanation:
the pendulum would eventually stop swinging dude to friction in the air. the friction makes heat even if it is the smallest amount it is still energy. the pendulum would eventually stop due to friction which makes heat
Explain the fundamental steps of the scientific method.
Final answer:
The scientific method is a structured process used by scientists to explore observations by proposing questions, forming hypotheses, testing them through experiments, and analyzing results to form conclusions.
Explanation:
The scientific method is a process scientists use to understand the world. It consists of several steps:
Start by making an observation that evokes curiosity or raises a question.Propose a question stemming from the observation.Conduct research to see what is already known.Create a hypothesis, which is an educated guess that answers your question.Test the hypothesis through experimentation, ensuring that results are measurable and repeatable.Collect data during the experimentation and analyze it to support or refute the hypothesis.Form a conclusion based on the analysis, and integrate the findings with existing knowledge.If the hypothesis is supported, it may become a theory. If not, the hypothesis can be revised or a new one can be proposed. This process is cyclical, not linear, because it often leads to new questions and additional experiments.
At its core, the scientific method is about testing ideas with evidence. Good hypotheses should be testable and predictions made from these should be verifiable through experiments. The scientific method is not a rigid formula, but a flexible process that can adapt as new observations and technologies emerge.
How many moles are in 240g of CaCO3?
Using the periodic table, find the molar mass of each compound in CaCO3
CA = 40
C = 12
O = 16
Molecular Mass = 40 + 12 + (16 x3) = 100 grams.
Number of moles = given mass / molecular mass
Number of moles = 240 g / 100g = 2.4 moles
What is not a possible component in nuclear control rods?
A. Boron
B. Neutron-absorbing material
C. Cadmium
D. Neutron-emitting material
D. Neutron-emitting material
Answer: The correct answer is Option D.
Explanation:
Nuclear control rods are defined as the rods which are used in nuclear reactor plants to control the fission rate of uranium and plutonium.
These rods are made up of few chemical elements like boron, silver, indium and cadmium. These rods have the capability of absorbing many neutrons without getting fissioned itself.
Thus, from the above information, the correct answer comes out to be Option D.
Can some help me do this we have a final tomorrow and i have now idea how to do it. Step by Step explanation and tips If you know any
Answer:
87.27 grams
Explanation:
The mole ratio of nitrogen to hydrogen is 1:3; while that one of hydrogen to the products (ammonia) is 3:2
Thus if 3 moles of hydrogen gas produce 2 moles of ammonia gas
7.7 moles of hydrogen will produce:
(7.7moles×2)/3
77/15 moles
1 mole of ammonia gas has a mass of 14+3=17
since the mass of an atom of nitrogen is 14 while that of hydrogen atom is 1.
Therefore 77/15 moles will have a mass of
77/15 moles × 17=87.27 grams
1. Name three alkanes and state a use for each.
2.(a) Explain what is meant by
(i) a saturated hydrocarbon (ii) an unsaturated hydrocarbon.
(b) Consider this list of hydrocarbons:
butane, ethene, octane, methane, butene
Name the hydrocarbons which are
(i) saturated,
(ii) unsaturated.
1. The simplest alkane is the gas methane, whose molecular formula is CH4. Methane exists as a tetrahedral shape, but it is often represented by a flattened structure as are most organic compounds.
Two four-carbon alkanes are known, and they have measurably different chemical and physical properties. Their structures are H3CCH2CH2CH3 and H3CCH(CH3)2. Therefore they were named normal butane, often abbreviated as n-butane, and isobutane. The straight-chain form is considered the "normal" form. Alternatively, they could be named using the systematic IUPAC method as 1-methylpropane and 2-methylpropane, or even as butane and 2-methylpropane. The IUPAC method names the longest straight carbon chain in the usual way and then numbers the carbons; the location of a substituent group is given by the number of its carbon. The IUPAC method is always used for more complicated molecules, but many of the simpler ones still use non-systematic names, called trivial names, because these are less cumbersome to use.
2 . Unsaturated hydrocarbons are hydrocarbons that have double or triple covalent bonds between adjacent carbon atoms. The term "unsaturated" means more hydrogen atoms may added to the hydrocarbon to make it saturated: consisting all single bonds.
Dont know 3. Sorry!
Need help on this ASAP !!!!
Answer:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
Explanation:
To balance the equation, you should apply the law of conservation of mass for the equations.
The law of conservation of mass states that the no. of each atom is equal in both sides (reactants and products).
Hydrocarbon is burned in oxygen to produce CO₂ and H₂O.
So, the given equation is balanced as:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
that 1.0 mole of C₃H₈ is burned in 5.0 moles of O₂ to produce 3.0 moles of CO₂ and 4.0 moles of H₂O.
The no. of all atoms is the same in both of reactants and products side.
C (3), O (10), and H (8).
What mass of carbon dioxide (CO2) will be produced if 2.90 moles of iron (Fe) is produced?
Answer:
191.4 g.
Explanation:
The balanced equation for the mentioned reaction is:Fe₂O₃(s) + 3CO(g) → 2Fe(s) + 3CO₂(g),
It is clear that 1.0 mole of Fe₂O₃ react with 3.0 mole of CO to produce 2.0 moles of Fe and 3.0 moles of CO₂.
Using cross multiplication:
2.0 mol of Fe produced with → 3.0 mol of CO₂, from stichiometry.
2.9 mol of Fe produced with → ??? mol of CO₂.
∴ The no. of moles of CO₂ produced = (3.0 mol)(2.9 mol)/(2.0 mol) = 4.35 mol.
∴ The mass of CO₂ produced = no. of moles x molar mass = (4.35 mol)(44.0 g/mol) = 191.4 g.
what is the most common mineral group in the earths crust
Answer:
The silicates
Explanation:
The silicates are the most common mineral groups on the earth crust. They account for a bulk 90% of all rocks and earth materials we find on our thin crust.
The silicates are made of the fundamental unit which is the SiO₄⁴⁻ tetrahedron. This forms the basic unit through which other elements combine with them. The silicates makes up the bulk of sands we have as silica.
The tetrahedron makes silicates unique and able to combine readily with other elements to form a wide range of minerals.
Most rocks found on the earth surface and in the crust are for their most parts made up of silicate minerals. Some of these minerals are olivine, quartz, beryl, phlogopite, feldspars etc.