What is the ratio of carbon atoms to hydrogen atoms in a saturated cyclic hydrocarbon?
Answers
1:2
ahh but why you may ask?
because there's 1 carbon bonded with 2 hydrogens.
the simplest answer,
because chemistry.
Explanation:
A saturated hydrocarbon is defined as the hydrocarbon in which there are only single bonds between the combining atoms.
On the other hand, a cyclic hydrocarbon is a ring structure in which hydrogen and carbon atoms are joined together.
Hence, a saturated cyclic hydrocarbon is a ring structure of hydrogen and carbon atoms joined together through single bonds only.
In a saturated cyclic hydrocarbon molecule, each carbon atom is bonded with two hydrogen atoms.
Therefore, we can conclude that the ratio of carbon atoms to hydrogen atoms in a saturated cyclic hydrocarbon is 1:2.
Related Questions
This is really confusing to me. I need help!!
How many orbitals are found in the 3d sublevel?
A. 1
B. 3
C. 5
D. 7
Answers
The d sub-level has five orbits (-2,-1,0,1,2) with a maximum capacity of ten electrons.
Answer: C. 5
216 j of energy is required to raise the temperature of aluminum from 15o to 35oc. calculate the mass of aluminum. (specific heat capacity of aluminum is 0.90 joc-1g-1).
Answers
we can use the following equation to calculate the mass of aluminium
H = mcΔt
H - heat energy supplied
m - mass of material
c - specific heat capacity of aluminium
Δt - change in temperature - 35 °C - 15 °C = 20 °C
substituting the values in the equation
216 J = m x 0.90 J°C⁻¹g⁻¹ x 20 °C
m = 12 g
mass of aluminium is 12 g
The mass of aluminum, the heat energy equation Q = mcΔT is used with the given values, resulting in a calculated mass of 12 grams.
The mass of aluminum using the given energy, temperature change, and specific heat capacity, we employ the formula for heat transfer: Q = mcΔT, where Q is the heat energy, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature.
Given that Q = 216 J, c = 0.90 J/°C·g, and ΔT = (35 - 15)°C = 20°C, we can rearrange the equation to solve for m:
m = Q / (cΔT) = 216 J / (0.90 J/°C·g · 20°C) = 216 J / (18 J/g) = 12 g
Therefore, the mass of aluminum is 12 grams.
What is the M of NaOH if it takes 40ml of NaOH to reach the equivalence point in a titration with 50ml of 0.2M HCL
Answers
number mole NaOH = number mole NaOH
M -molarity, V - volume
M(NaOH)*V(NaOH) = M(HCl)*V(HCl)
M(NaOH)*40 ml = 0.2 M*50 ml
M(NaOH)=0.2 M*50 ml/40 ml=1/4 M=0.25 M NaOH
Final answer:
The molarity of NaOH in the titration with 50ml of 0.2M HCl when it takes 40ml of NaOH to reach the equivalence point is calculated using the formula M1V1 = M2V2. The resulting molarity of NaOH is 0.25M.
Explanation:
The student is asking about a titration question, specifically determining the molarity of a sodium hydroxide (NaOH) solution based on its reaction with a known concentration of hydrochloric acid (HCl).
To calculate the molarity (M) of NaOH, we can use the formula:
M1V1 = M2V2, where:
M1 is the molarity of HClV1 is the volume of HClM2 is the molarity of NaOHV2 is the volume of NaOHGiven that we have 50ml of 0.2 M HCl and it takes 40ml of NaOH to reach the equivalence point, we can solve for M2 (molarity of NaOH) as follows:
(0.2 M) * (50 ml) = (M2) * (40 ml)
M2 = (0.2 M * 50 ml) / 40 ml
M2 = 0.25 M
Therefore, the molarity of NaOH is 0.25 M.
What is the density of HDPE vs Water?
Answers
HDPE has a density greater or equal to 0.941 g/cm³, which is less dense than water at 1 g/cm³, allowing it to float. LDPE has a lower density of 0.910-0.940 g/cm³, which is even less dense and more flexible than HDPE.
Density of HDPE vs Water
The density of high-density polyethylene (HDPE) relative to water is an interesting comparison, especially considering the applications of HDPE in various products. HDPE is defined by a density greater or equal to 0.941 g/cm³. It has a low degree of branching, resulting in stronger intermolecular forces due to the mostly linear molecules packing together well. Consequently, HDPE has a higher tensile strength and is used in items like milk jugs, detergent bottles, and water pipes. On the other hand, water has a density of approximately 1 g/cm³ at 4°C, which is in a liquid state. Since HDPE is less dense than water, it is capable of floating when formed into items like plastic bottles.
By contrast, low-density polyethylene (LDPE), with a density range of 0.910-0.940 g/cm³, characterizes materials that require greater flexibility and less strength, such as plastic bags and film wrap. It's important to recognize the unique properties of polymers like HDPE and LDPE and how their densities relate to their function in everyday materials.
What mass of propane (c3h8(g)) must be burned to supply 2775 kj of heat? the standard enthalpy of combustion of propane at 298 k is −2220 kj · mol−1 ?
Answers
Balanced chemical reaction: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O.
Make proportion: 1 mol(C₃H₈) : 2220 kJ = n(C₃H₈) : 2775kJ.
n(C₃H₈) = 2775 kJ·mol ÷ 2220 kJ.
n(C₃H₈) = 1.25 mol.
m(C₃H₈) = n(C₃H₈) · M(C₃H₈).
m(C₃H₈) = 1.25 mol · 44.1 g/mol.
m(C₃H₈) = 55.125 g.
n - amount of substance.
What is the new mass/volume (m/v)% of a koh solution that is prepared by diluting 110 ml of a 6% (m/v) koh solution to 330 ml?
Answers
c1v1 = c2v2
c1 is concentration and v2 is volume of the concentrated solution
c2 is concentration and v2 is volume of the diluted solution to be prepared
in this case we have been given m/v % which we can use as the concentrations
substituting the values in the equation
6% x 110 mL = C x 330 mL
C = 2%
the new m/v % of the diluted solution prepared is 2% (m/v)
Which energy changes are associated with a liquid boiling?
A. Energy is released, and potential energy decreases.
B. Energy is absorbed, and potential energy increases.
C. Energy is released, and kinetic energy decreases.
D. Energy is absorbed, and kinetic energy increases.
Answers
When a liquid boils, energy is absorbed, and potential energy increases.
The energy changes associated with a liquid boiling are:
Energy is absorbed, and potential energy increases.Boiling involves supplying energy to break intermolecular forces and convert the liquid into a gas, leading to an increase in potential energy.
During boiling, energy is absorbed to convert the liquid into gas, increasing the potential energy of the molecules. The temperature remains constant as energy is used for the phase change. The correct answer is B.
A liquid changes phases from a liquid to a gas as it boils. This process is associated with the absorption of energy. Specifically, energy in the form of heat is absorbed by the liquid to overcome the intermolecular forces that hold the molecules together. The molecules' potential energy rises as a result.
Kinetic energy does not increase significantly during the boiling process. Instead, the absorbed energy converts to potential energy, allowing molecules to move from the liquid phase to the gas phase. This is why the temperature of the liquid remains constant at its boiling point; all additional energy is used for the phase change rather than increasing the temperature.An example of this can be seen when water boils. When you heat water on a stove, the temperature rises until it reaches [tex]100^{\circ}C[/tex] ([tex]212^{\circ}F[/tex]). At this boiling point, the water does not get hotter. Instead, the energy absorbed continues to be used to convert the water from liquid to vapor, indicating that the energy is going into increasing the potential energy.
Identify the element that has a ground state electron configuration of [ar]4s23d104p5 .
Answers
4 in 4p⁵ shows that an element is in the 4th period,
4s²4p⁵ (2+5=7) shows that element is in 17 group, if we have p-electrons on the last level, we need to count s-electrons and p-electrons, and then we will see number of the group, where an element is. 7 s- and p- electrons on the last level, so element in 17th group.
4th period, 17th group - it is Br.
The element that has a ground-state electron configuration of [ar]4s23d104p5 - bromine (br)
Electron configurations are the representation of the electrons are around a nucleus.
electronic configuration is [Ar]4s23d104p5 [Ar] or argon has 18 electrons.In 4S orbital, there are 2 electrons, 3d orbital there are 10 electrons, and 4p orbital, there are 5 electrons.Total number of electrons = 18+2+10+5 = 35.Atomic number (Z) is the number of electrons present in an atom.Therefore, the atomic number of a given element is 35.35 is the atomic number of bromineThus, the element that has a ground-state electron configuration of [ar]4s23d104p5 - bromine (br)
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Give the expression for the solubility product constant for baf2.
Answers
Solubility product constant (Ksp) is applied to the saturated ionic solutions which are in equilibrium with its
solid form. The solid is partially dissociated into its ions.
For the BaF, the dissociation as follows;
BaF₂(s) ⇄ Ba²⁺(aq)
+ 2F⁻(aq)
Hence,
Ksp = [Ba²⁺(aq)] [F⁻(aq)]²
What is the waste product bilirubin produced from? globin chains of hemoglobin iron found in hemoglobin molecules heme molecules lacking iron heme molecules with iron?
Answers
Heme molecules deficient in iron produce the waste product bilirubin. Heme molecules are broken down into bilirubin during the breakdown of red blood cells.
Bilirubin is a waste product formed by iron-deficient heme molecules. The heme molecules are metabolised and transformed into bilirubin as red blood cells degrade. This bilirubin is then taken to the liver and processed further before being eliminated from the body via bile. Bilirubin is a yellowish pigment produced by the body during the breakdown of red blood cells. It is a byproduct of the heme metabolism. When red blood cells reach the end of their useful life, they undergo a process known as hemolysis. Heme molecules within red blood cells are transformed into bilirubin during this process.
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What is the net ionic equation of 2h+ + so42- + ca2+ + 2i- caso4 + 2h+ + 2i-?
Answers
2 H^+ + SO4^2- + Ca^2+ + 2 i^- = CaSo4 + 2H^+ +2i ^-
cancel the spectator ion that is the ions which does not take place nin the reaction
for this case is 2 H^+ and 2 i^-
the net ionic equation is therefore
=Ca^2+ + SO4^2- = CaSO4
he is right he is correct
What is the molarity of a solution that has 10 moles of naoh dissolved in 100ml of water?
Answers
What mass of magnesium bromide would be required to prepare 720?
Answers
What mass of magnesium bromide would be required to prepare 720mL of a 0.0939M aqueous solution?
Answer:
Molarity is calculated using following formula,
Molarity = Moles / Volume of Solution ---- (1)
Data Give;
Molarity = 0.0939 mol.L⁻¹
Volume = 720 mL = 0.72 L
Solving eq.1 for Moles,
Moles = Molarity × Volume
Moles = 0.0939 mol.L⁻¹ × 0.72 L
Moles = 0.0676 moles
Now convert Moles into Mass using following formula,
Moles = Mass / M.Mass
Solving for Mass,
Mass = Moles × M.Mass
Mass = 0.0676 mol × 184.113 g.mol⁻¹
Mass = 12.44 grams
H2O goes to H3O+
a. Did it gain or lose a proton?
b. Is it a Bronsted-Lowry acid or base?
Answers
H₂O Gained Electron.
H₂O is Bronsted-Lowry Base.
Explanation:
Due to amphoteric nature of water it can act as acid when reacted with strong base, also it can act as base when reacted with strong acid.
In given statement water is treated with strong acid hence it is acting as Bronsted-Lowery Base, as it accepting H⁺. So those species which accepts proton are called as Bronsted-Lowry Base and those which donated proton are called as Bronsted-Lowry Acid.
H₂O + H⁺ → H₃O⁺
Final answer:
H2O gains a proton to become H3O+, which makes it a Brønsted-Lowry base in that reaction. However, water can also behave as a Brønsted-Lowry acid in other reactions, where it is the proton donor.
Explanation:
When H2O transforms into H3O+, it gains a proton, evidenced by the increase in hydrogen atoms. This process classifies water (H2O) as a Brønsted-Lowry base in this specific scenario, as it is accepting a proton. However, it's important to note that water can also act as a Brønsted-Lowry acid under different conditions, donating a proton to another substance.
For instance, in the reaction C6H5NH₂(aq) + H₂O(l) → C6H5NH3*(aq) + OH−(aq), water donates a proton to C6H5NH2, making it the Brønsted-Lowry acid. Conversely, in the reaction HCOOH(aq) + H2O(l) → H3O*(aq) + HCOO−(aq), water accepts a proton from formic acid (HCOOH), making it the Brønsted-Lowry base.
Compared to the nucleus 5626Fe, what is the radius of the nucleus 112 48Cd?
Answers
The Nuclear radius formula or radius of nucleus formula: R = R₀ · ∛A.
R is nuclear radius.
R₀ is empirical constant, R₀ = 1.2 10⁻¹⁵ m.
A is number of nucleon.
R(Fe) = 1.2·10⁻¹⁵ m · ∛56.
R(Fe) = 4.59·10⁻¹⁵ m.
R(Cd) = 1.2·10⁻¹⁵ m · ∛112.
R(Cd) = 5.78·10⁻¹⁵ m.
R(Cd) / R(Fe) = 5.78·10⁻¹⁵ m / 4.59·10⁻¹⁵ m.
R(Cd) / R(Fe) = 1.26.
How many hydroxide ions are needed to completely neutralize 1.0 liter of 0.50 m hcl?
Answers
find the moles of H^+ used from HCl
moles = molarity x volume
= 0.50 x 1 =0.50 moles of H^+ used
write ionic equation for reaction
that is H ^+ + OH^- = H2O
by use of mole ratio between H^+ to OH^- which is 1:1 the moles of OH^- used = 0.50 x1/1 = 0.50 moles
By use of Avogadro law constant
1 mole = 6.02 x10^23 ions
what about 0.5 moles
= 0.5 moles/ 1 moles x 6.02 x10^23 = 3.01 x10^23 ions of OH^-
To neutralize 1.0 liter of 0.50 M HCl, you need 3.011 × 10²³ of hydroxide (OH⁻) ions.
To determine how many hydroxide ions are needed to completely neutralize 1.0 liter of 0.50 M HCl, follow a simple stoichiometry process:
The balanced chemical equation for the neutralization reaction is:HCl + OH⁻ → H₂O + Cl⁻
Given:
Volume of HCl solution = 1.0 literMolarity of HCl solution = 0.50 MFirst, calculate the moles of HCl in the solution:
Moles of HCl = Molarity × Volume = 0.50M × 1.0L = 0.50moles
Since each mole of HCl provides one mole of H⁺ ions, there are 0.50 moles of H⁺ ions.
To completely neutralize these H⁺ ions, we need an equal number of OH⁻ ions:
Moles of OH⁻ needed = 0.50 molesSince 1 mole of any substance contains Avogadro's number of entities (ions, molecules, etc.), which is approximately 6.022 x 10²³ entities per mole, we can convert moles of OH⁻ to number of ions:
Number of OH⁻ ions = 0.50moles x 6.022 x 10²³ ions/mole = 3.011 x 10²³
which has not been a major source of CFCs
Answers
Answer : Any natural sources of CFC's are not known only the major sources like aerosols, propellants, refrigerants,etc are known. So, if any natural sources are given then it cannot be called as a major source for emitting CFC into environment.
Answer:
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Sulfuric acid reacts with aluminum hydroxide by double replacement.
a. if 30.0 g of sulfuric acid reacts with 25.0 g of aluminum hydroxide, identify the limiting reactant.
b. determine the mass of excess reactant remaining.
c. determine the mass of each product formed. assume 100% yield.
Answers
a.
The balanced equation for the reaction between sulfuric acid and aluminium hydroxide is,
3H₂SO₄ + 2Al(OH)₃ → Al₂(SO₄)₃ + 6H₂O
Molar mass of H₂SO₄ = 98 g/mol
moles of H₂SO₄ = 30.0 g /98g /mol = 0.306 mol
mass of Al(OH)₃ = 25.0 g
Molar mass of Al(OH)₃ = 78 g/mol
moles of Al(OH)₃ = 25.0 g/ 78 g/mol = 0.321 mol
Stoichiometric ratio between H₂SO₄ and Al(OH)₃ is 3 : 2
Hence reacted moles of H₂SO₄ = 0.306 mol
reacted moles of Al(OH)₃ = 0.306 mol x (2 / 3) = 0.204 mol
Hence the limiting reactant is H₂SO₄
b.
According to the above calculation, the excess reactant is Al(OH)₃.
The reacted moles of Al(OH)₃ = 0.306 mol x (2 / 3) = 0.204 mol
The added moles of Al(OH)₃ = 0.321 mol
Hence the remaining Al(OH)₃ moles = added moles - reacted moles
= 0.321 mol - 0.204 mol
= 0.117 mol
Molar mass of Al(OH)₃ = 78 g/mol
Remaining mass of Al(OH)₃ = number of moles x molar mass
= 0.117 mol x 78 g/mol
= 9.126 g
c.
The products formed from the reaction between
aluminium hydroxide and sulfuric acid are Al₂(SO₄)₃ and H₂O
The limiting reactant is H₂SO₄
The stoichiometric ratio between H₂SO₄
and Al₂(SO₄)₃ is 3 : 1
Reacted moles of H₂SO₄ =
0.306 mol
Hence the moles of Al₂(SO₄)₃ formed = 0.306 mol / 3
= 0.102 mol
Molar mass of Al₂(SO₄)₃ = 342 g/mol
Mass of Al₂(SO₄)₃ formed = 0.102 mol x 342 g/mol
= 34.884 g
The stoichiometric ratio between H₂SO₄
and H₂O is 3 : 6
Reacted moles of H₂SO₄ =
0.306 mol
Hence the moles of H₂O formed = 0.306 mol x (6 / 3)
= 0.612 mol
Molar mass of H₂O = 18 g/mol
Mass of H₂O formed = 0.612 mol x 18 g/mol
= 11.016 g
The limiting reactant is sulfuric acid. The mass of excess reactant remaining is 13.075 g. The mass of aluminum sulfate formed is 104.738 g and the mass of water formed is 5.562 g.
Explanation:The question is about a chemical reaction where sulfuric acid reacts with aluminum hydroxide by double displacement to produce aluminum sulfate and water.
To identify the limiting reactant, we need to know the moles of sulfuric acid and aluminum hydroxide. Using the molecular weights (98.09 g/mol for sulfuric acid and 78.0 g/mol for aluminum hydroxide), we find that we have 0.306 moles of sulfuric acid and 0.32 moles of aluminum hydroxide. The reaction ratio from the balanced chemical equation is 1:2, implying we need twice as many moles of sulfuric acid as aluminum hydroxide. Therefore, sulfuric acid is the limiting reactant.Using the stoichiometry of the reaction, we find out that all the sulfuric acid is consumed, leaving excess aluminum hydroxide. The mass of excess reactant remaining is calculated by subtracting the mass of aluminum hydroxide consumed from the initial mass of aluminum hydroxide. Aluminum hydroxide consumed is (0.306 moles / 2) * 78.0 g/mol = 11.925 g. So, the mass of excess reactant remaining is 25.0 g (initial) - 11.925 g(consumed) = 13.075 gIn terms of mass of each product formed, we get aluminum sulfate and water. The mass of aluminum sulfate formed is the moles of limiting reactant times the molar mass of the product, i.e., 0.306 moles * 342.15 g/mol = 104.738 g. The mass of water formed is also calculated similarly, giving 5.562 g.Learn more about Limiting Reactant here:https://brainly.com/question/33417913
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How long would it take a car traveling with a speed of 95 km/h to travel 250 km between Plainview and Cedar Crest?
A. about 1.7 hours
B. about 2.1 hours
C. about 2.4 hours
D. about 2.6 hours
Answers
Question 10 unsaved in a chemical reaction, the mass of the products question 10 options: has no relationship to the mass of the reactants. is less than the mass of the reactants. is greater than the mass of the reactants. is equal to the mass of the reactants.
Answers
A solution consists of two parts. one part is the substance that is dissolved. what is the name of this part of a solution?
Answers
______________________________________________________
The substance that is dissolved in the solution is the "solute".
______________________________________________________
{Note of interest: In an aqueous solution, the medium in which the solute is dissolved is the "solvent". }.
______________________________________________________
What is the mass percent (m/m) concentration of a solution prepared from 500. g nacl and 2.50 kg of water?
Answers
mass of the solute/mass of the solvent x100
mass of the solute = 500g
mass of the solvent = 2.50kg in grams= 2.50 x1000 = 2500 g
%(M/M)= 500 g/2500g x100= 20% (m/M)
Answer: The mass percent of NaCl solution is 16.66 %
Explanation:
To calculate the mass percentage of NaCl solution, we use the equation:
[tex]\text{Mass percent of NaCl solution}=\frac{\text{Mass of solute (NaCl)}}{\text{Mass of solution}}\times 100[/tex]
Mass of solute (NaCl) = 500.0 g
Mass of solvent (water) = 2.50 kg = 2500 g (Conversion factor: 1 kg = 1000 g)
Mass of solution = Mass of solute + Mass of solvent = 500.0 + 2500 = 3000 g
Putting values in above equation, we get:
[tex]\text{Mass percent of NaCl solution}=\frac{500.0g}{3000g}\times 100\\\\\text{Mass percent of NaCl solution}=16.66\%[/tex]
Hence, the mass percent of NaCl solution is 16.66 %
Which quantity or quantities must always be the same on both sides of a chemical equation? (a) the number of atoms of each kind (b) the number of molecules of each kind (c) the number of moles of each kind of molecule (d) the sum of the masses of all substances involved?
Answers
Explanation:
An equation that contains same number of atoms on both reactant and product side is known as a balanced chemical equation.
Also, mass of substances involved and formed in a chemical reaction will be equal.
For example, [tex]2K + Cl_{2} \rightarrow 2KCl[/tex]
Number of K atoms on both reactant and product side are 2.
Number of Cl atoms on both reactant and product side are 2.
Therefore, this equation is balanced.
Also, mass of K = 39.09 g/mol, mass of Cl = 35.45 g/mol.
Sum of reactant molecules = [tex](2 \times 39.09 g/mol) + (2 \times 35.45 g/mol)[/tex]
= 149.08 g/mol
Sum of product molecules = [tex]2 \times (39.09 g/mol + 35.45 g/mol)[/tex]
= 149.08 g/mol
Therefore, masses of atoms involved is same on both reactant and product side.
Thus, we can conclude quantity or quantities that must always be the same on both sides of a chemical equation are as follows.
the number of atoms of each kind.the sum of the masses of all substances involved.The quantities which must always be the same on both sides of a chemical equation is:
(a) the number of atoms of each kind.
(d) the sum of the masses of all substances involved.
A chemical reaction refers to a chemical process that involves the rearrangement or transformation of the ionic, atomic or molecular structure of a chemical element through the breakdown and formation of chemical bonds in order to produce a new compound.
A chemical equation is typically used to denote or represent a chemical reaction between two or more chemical elements.
A balanced chemical equation is one in which the number of atoms on the reactant (left) side is equal to the number of atoms on the product (right) side.
This ultimately implies that, both the charge on each atom and sum of the masses of the chemical substances in a chemical equation are properly balanced.
Additionally, all chemical equations must be in accordance with the Law of Conservation of Mass because mass can neither be created nor destroyed.
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Can someone explain to me the differences between atom vs molecule vs compound vs element with examples? HELPPPPPPPPPPPPPPPPPP
Answers
An atom is the simplest form of an element that can exist, such as a lithium atom (Li).
Atoms of different elements can be combined together to create compounds, e.g sodium oxide (Na2O).
A molecule is a combination of 2 or more atoms that form chemical bonds. When these atoms are of the same element, they can be called molecules (e.g. O3 - ozone).
However when a molecule is made up of atoms of different elements, they are classified as compounds (e.g. CO2 - carbon dioxide).
So all compounds are molecules, but not all molecules are compounds.
A COMPOUND is 2 or more bonded atoms, even if the same element is bound to itself. These can be ionic and/or covalent bonds (amongst other types).
An example is NaCl sodium chloride, which has an ionic bond.
A MOLECULE is a substance of 2 or more atoms , however, it contains ONLY COVALENT bonds between its atoms. These can be monoatomic (only one atom) or polyatomic (many different elements.
For example, O2 or the oxygen molecule is monoatomic - 2 oxygen atoms covalently bonded.
CO2 or carbon dioxide contains a carbon double covalently bonded to 2 different oxygen atoms.
Every molecule is a compound, but not every compound is a molecule. In other words, molecule is a special subtype of compound.
HEEELLLPPP PPLEEAASSEE
Which statement best describes a battery?
Identical cells are arranged in the same orientation to increase the energy output.
Identical cells are arranged in opposite orientations to reverse the half reactions.
Different cells are arranged in the same orientation to increase the energy output.
Different cells are arranged in opposite orientations to reverse the half reactions.
Answers
OXIDATION UNIT TEST
1. Which statement best explains why magnesium and chlorine combine in a 1:2 ratio?
A. Magnesium has two valence electrons, and chlorine can accept one electron in its outer shell
2. Hydrogen and nitrogen combine to form ammonia. When nitrogen and hydrogen bond, nitrogen pulls the electrons from hydrogen toward itself. Which statement about the reactants is correct?
C. Hydrogen is oxidized, and nitrogen is reduced.
3. C3H8 + 5O2 → 3CO2 + 4H2O + energy
Which type of reaction is shown?
C. combustion
4. Which phrase best defines a redox reaction?
D. a reaction in which electrons are transferred between different atoms
5. Which statement describes the process of oxidation?
D. Oxidation results in a loss of electrons, so the oxidation number increases.
6. Which chemical equation represents a redox reaction?
D. Fe2O3(s) + 2Al(s) → Al2O3(s) + 2Fe(l)
7. Which statement correctly describes the oxidation number of the manganese atom (Mn) in MnI2 and MnO2?
A. Manganese has an oxidation number of +2 in MnI2 and +4 in MnO2.
8. Br2(l) + 2NaI(aq) → I2(s) + 2NaBr(aq)
Which elements are oxidized and reduced in the reaction?
D. Iodine (I) is oxidized, and bromine (Br) is reduced.
9. Which action occurs at an electrode of a galvanic cell?
D. electron transfer
10. Which statement best compares a battery and a galvanic cell?
A. A battery’s source of power is a galvanic cell in which a redox reaction produces electrical energy.
11. Zn + 2H+ → Zn2+ + H2
2Al + 3Cu2+ → 2Al3+ + 3Cu
Which elements are oxidized?
A. zinc (Zn) and aluminum (Al)
12. 2Cr(s) + 3Cu2+(aq) → 2Cr3+(aq) + 3Cu(s)
Which half reaction occurs at the cathode?
B. 3Cu2+(aq) + 6e– → 3Cu(s)
13. Written
14. Written
15. Written
I hope this helps!
A battery can be described as identical cells arranged in the same orientation to increase energy output. Therefore, option (A) is correct.
What is a battery?Batteries are used in various electronic devices as a source of power. A battery can be described as an electronic device that is needed for storing chemical energy and transforming it into an electrical one.
The battery is an important device that helps electronic devices to work seamlessly and stores chemical energy, It provides electrical energy to many devices to work.
An electrochemical cell helps in the functioning of the battery. A battery may consist of only one or many electrochemical cells. The chemical reaction occurring inside the cell produces electrons at one electrode. These electrons start moving and produce electricity.
The identical cells in a battery are arranged in the same orientation to increase the energy output.
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What volume of O2(
g. at 810. mmHg pressure is required to react completely with a 4.50g sample of C(s) at 48°C? 2 C(s) + O2(
g. → 2 CO(
g.
Answers
Balanced chemical reaction: 2C + O₂ → 2CO.
m(C) = 4.50 g.
n(C) = m(C) ÷ M(C).
n(C) = 4.50 g ÷ 12 g/mol.
n(C) = 0.375 mol.
From chemical reaction: n(C) : n(O₂) = 2 : 1.
n(O₂) = 0.1875 mol.
T = 48°C = 321.15 K.
p = 810 mmHg ÷ 760 mmHg/atm= 1.066 atm.
R = 0.08206 L·atm/mol·K.
Ideal gas law: p·V = n·R·T.
V(O₂) = n·R·T / p.
V(O₂) = 0.1875 mol · 0.08206 L·atm/mol·K · 321.15 K / 1.066 atm.
V(O₂) = 4.63 L.
In alpha and beta decay the parent element and the daughter element can be
Answers
This is because as alpha particles comes out; the new element will have two less in atomic number; that is the atomic number will reduce by two and the mass number will reduce by four. While in a beta particle decay, the new element will have one higher in atomic number; that is the atomic number will increase by one.
"if the ph of a solution is _____ the solution is basic.
a. 2b. 5c. 7d. 10"
Answers
If the pH of a solution is should be 10 is the solution is basic.
Hope it helped you.
-Charlie
These types of electromagnetic waves are right next to microwaves on the electromagnetic spectrum:
A. radio
B. X rays
C. red light
D. ultraviolet
Answers
Object A has 604 J of kinetic energy and 285 J of gravitational potential energy. Object B has 481 J of kinetic energy and 300 J of gravitational potential energy. Which object has more mechanical energy? Object A has more mechanical energy. Object B has more mechanical energy. They have the same amount of mechanical energy. There is not enough information to know.
Answers
Object A has kinetic energy as 604 J and gravitational potential energy as 285 J.
Hence, mechanical energy of A = 604 J + 285 J
= 889 J
Object B has kinetic energy as 481 J and gravitational potential energy as 300 J.
Hence, mechanical energy of A = 481 J + 300 J
= 781J
Hence, object A has more mechanical energy than B.
Answer:
Object A has more mechanical energy.
Explanation:
Object A has more mechanical energy.