put 8 in front of the oxygen in the reactants side to make it 16 molecules then put a 5 in front of the co2 in the product side to balance the carbon atoms then put a 6 in front of the H20 on the product side this balances both the hydrogen and oxygen atoms here is a representation
C5H12(g)+8O2(g)=5CO2(g)+6H20
Which of the following can behave as Bronsted-Lowry acids in aqueous solution?
a. HNO3
b. NH4+
c. Br-
d. KOH
e. None of the Above
The following substances can behave as Bronsted-Lowry acids in aqueous solution: HNO₃ and NH₄+
The correct answer is a and b.
The Bronsted-Lowry acid theory is a chemical theory that explains acids and bases and their reactions. It defines acids as proton donors and bases as proton acceptors.
According to the definition provided by Bronsted–Lowry, an acid is a proton (H+) donor, while a base is a proton acceptor. At the point when a Brønsted-Lowry corrosive loses a proton, a form base is shaped. Similarly, a conjugate acid is produced when a Bronsted–Lowry base acquires a proton.
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5. What percent of CuCl₂ is Cu?
Answer: The mass percent of copper in copper chloride is 47.23 %.
4. What is the substance called that dissolves the other substance in a solution?
a. Soluto
b. Mixture
c. Solvent
d. Concentrator
Answer:
Solvent
Explanation:
When one substance dissolves into another, a solution is formed. A solution is a homogeneous mixture consisting of a solute dissolved into a solvent
issued this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your etext. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon.
The atomic ratio of carbon to oxygen in carbon monoxide (CO) is 1:1, and the atomic ratio of carbon to oxygen in carbon dioxide (CO₂) is 2:1.
Firstly, we can analyze the decomposition of carbon monoxide (CO) and carbon dioxide (CO₂) to determine the atomic ratios involved.
Let's denote the atomic ratio of carbon to oxygen in carbon monoxide as x, and the atomic ratio of carbon to oxygen in carbon dioxide as y.
According to the given data;
Decomposition of carbon monoxide (CO);
Oxygen produced = 3.36 g
Carbon produced = 2.52 g
We know that the atomic mass of carbon is 12 g/mol, and the atomic mass of oxygen is 16 g/mol. Using these values, we can calculate the number of moles for each element;
Number of moles of oxygen = mass / atomic mass = 3.36 g / 16 g/mol = 0.21 mol
Number of moles of carbon = mass / atomic mass = 2.52 g / 12 g/mol = 0.21 mol
Since the atomic ratio of carbon to oxygen in carbon monoxide is x, we can write the following equation;
0.21 mol C / (0.21 mol O) = x
Simplifying the equation, we have;
x = 1
Therefore, the atomic ratio of carbon to oxygen in carbon monoxide is 1:1.
Decomposition of carbon dioxide (CO₂);
Oxygen produced = 9.92 g
Carbon produced = 3.72 g
Following the same calculations as before;
Number of moles of oxygen = mass / atomic mass = 9.92 g / 16 g/mol = 0.62 mol
Number of moles of carbon = mass / atomic mass = 3.72 g / 12 g/mol = 0.31 mol
Since the atomic ratio of carbon to oxygen in carbon dioxide is y, we can write the following equation;
0.31 mol C / (0.62 mol O) = y
Simplifying the equation, we have;
y = 0.5
Therefore, the atomic ratio of carbon to oxygen in carbon dioxide is 1:0.5, which can be simplified to 2:1.
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--The given question is incomplete, the complete question is
"Missed this? watch kcv: atomic theory; read section 2.3. you can click on the review link to access the section in your text. carbon and oxygen form both carbon monoxide and carbon dioxide. when samples of these are decomposed, the carbon monoxide produces 3.36 g of oxygen and 2.52 g of carbon, while the carbon dioxide produces 9.92 g of oxygen and 3.72 g of carbon. Calculate the atomic ratio of carbon to oxygen in carbon monoxide, and carbon dioxide."--
How is water used in human living? Give at least five examples.
44.) An object possesses a density of 2.780 g/mL. If the mass of the object is 0.896 grams, what is the
volume, in of the object in mL?
(A) 0.3223 mL
(B) 3.22 x 10-4 mL
(C) 3.223 x 10-4 mL
(D) 0.322 mL
An object possesses a density of 2.780 g/mL. and the mass of the object is 0.896 grams, the volume, in of the object in mL is (A) 0.3223 mL
To calculate the volume of an object, we can use the formula:
Volume = Mass / Density
Given that the mass of the object is 0.896 grams and the density is 2.780 g/mL, we can substitute these values into the formula:
Volume = 0.896 g / 2.780 g/mL
By performing the division, we find:
Volume = 0.3223 mL
So, the volume of the object is 0.3223 mL.
Therefore, the correct answer is (A) 0.3223 mL.
It's important to note that the volume is expressed in milliliters (mL) since the density is given in grams per milliliter (g/mL). The calculation involves dividing the mass (in grams) by the density (in g/mL), resulting in the volume in milliliters.
Understanding and applying the formula for calculating volume using mass and density helps us determine the physical space occupied by an object based on its characteristics. Therefore, Option A is correct.
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Jean-Baptiste, after studying the way heat flows through solid materials, discovers a _____
that says the rate of heat flow is proportional to the difference in temperature per centimeter, and he measures the constant of proportionality for several substances.
Sadi proposes the _____ that substances become hot when rubbed because the pressure of the rubbing squeezes out a fiery bright substance he calls caloric.
James sets up an _____
in which he will carefully stir the water in an insulated container, keeping track of the force required to stir the water, and then measure any temperature rise in the water. He hopes to find out whether the energy of stirring can be transformed into heat.
What are the missing words?
Observation, Experiment, Law, Theory, Hypothesis
The words that complete these descriptions are law, hypothesis, and experiment.
What is a law?
In science, a law is a statement that accurately describes the way a natural phenomenon occurs. Due to this, laws are created after testing a hypothesis several times. This matches Jean-Baptiste's proposal because his idea about heat flow has been tested by himself and others multiple times.
What is a hypothesis?
Different from a law, a hypothesis only states a possible explanation but this should be tested to become a law. This concept can be applied to Sadi because he only has an idea about heat flow but this has not been tested.
What is an experiment?
This is a procedure that aims at testing a hypothesis. This concept applies to James because he is carrying out an objective procedure to understand energy and heat.
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In which list are the elements arranged in order of increasing atomic mass?
a) Cl, K, Ar
b) Fe, Co, Ni
c) Te, I, Xe
d) Ne, F, Na
Answer:
aswer is A
Explanation:
because the CL,K,AR is correct since it is order right
What is the process whereby scientists check each other’s work?
A. defining the audience
B. conferencing
C. peer reviewing
D. writing
Answer:
peer reviewing
Explanation:
Its peer reviewing because there peers and there reviewing eachothers work
The process whereby scientists check each other’s work is peer reviewing.
What is peer group?Peer group are the groups of people of same age, same background with same interest.
In the peer reviewing process group of members will check, evaluate and correct each others work, which in turn help the members of the group to update their work.
Hence, option (c) is correct i.e. peer reviewing is the process whereby scientists check each other’s work.
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Which of the following best describes electroplating?
A Forcing a nonspontaneous reaction
B. Depositing one metal on another
c
C Tuming a metal Jions
D. Reversing the flow of electrons
Answer:
The answer is Depositing one metal on another
Explanation:
Depositing one metal on another best describes electroplating. Hence, option B is correct.
What is electroplating?"Electroplating is a process that uses an electric current to reduce dissolved metal cations so that they form a thin coherent metal coating on an electrode."
An electroplating process is the electroplating of copper in which the metal to be plated (copper) is used as the anode, and the electrolyte solution contains the ion of the metal to be plated (Cu2+). Copper in the solution at the anode and is plated at the cathode.
Electroplating is primarily used to change the physical properties of the materials. This process can be used to give materials increased wear resistance, corrosion protection or aesthetic appeal, as well as increased thickness.
Hence, depositing one metal on another best describes electroplating.
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Having a control group is important when doing an investigation why?
Answer:to help understand the stuff more
Explanation:
What is the general formula for a straight-chain alkane?
C2H8
CH3CH3CH3
CH3CH2CH3
CH3CH2CH2CH3
Answer:
The general formula for a straight chain alkane is CnH(2n+...so correct option is C and D
Calculate the standard reaction free energy for the following redox reaction. mn2 (aq) 2h2o(l)
The standard reaction free energy for the given redox reaction is -291 kJ/mol.
To calculate the standard reaction free energy for the given redox reaction, we can use the Nernst equation. The Nernst equation relates the standard reaction free energy (∆G°) to the standard cell potential (∆E°) of the reaction.
The balanced redox reaction is:
Mn^2+ (aq) + 2H_2O (l) → MnO_2 (s) + 4H+ (aq) + 2e^-
First, we need to determine the standard cell potential (∆E°). The standard potential for the Mn^2+ / MnO_2 couple is +1.51 V, and the standard potential for the H2O / H+ couple is 0 V. By combining these two half-reactions, the overall standard cell potential (∆E°) is +1.51 V.
Next, we use the equation: ∆G° = -nF∆E°, where n is the number of electrons transferred and F is Faraday's constant (96485 C/mol).
Since 2 electrons are transferred in this reaction, n = 2. Plugging in the values, we get:
∆G° = -2 × 96485 C/mol × (+1.51 V)
Simplifying the equation gives us:
∆G° = -291272 J/mol = -291 kJ/mol
Therefore, the standard reaction free energy for the given redox reaction is -291 kJ/mol.
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Limestone is a naturally occurring form of calcium carbonate. The correct formula for
limestone is
O CaCO3
Ca3(CO3)2
*O Ca(CO3)2
O Ca2CO3
How do changes in temperature affect the rate of a reaction?
Answer:
well an increase in temperature increases the rate of reaction it will raise the average kinetic energy if the reactant molecules
Answer:
Explanation:
An increase in temperature leads to an increase in the reaction rate and, conversely, a decrease in temperature slows down the reaction rate.
Which of the following is a characteristic property of matter that could be used to identify an unknown substance?
• mass
• density
•volume
•temperature
Answer:
physical properties
Explanation:
the characteristics (properties) that can be observed without changing the identity of a substance
Examples of physical properties
mass, color, size, volume, texture, density, state of matter, boiling point, melting point
The physical properties is a characteristic property of matter that could be used to identify an unknown substance.
What are physical properties?Physical properties are defined as a quality of matter that can be observed and quantified without altering the chemical identity of the sample.
It can also be defined as the features of matter that may be observed and quantified without changing the sample's chemical identity.
Mass, volume, density, temperature, color, appearance, texture, polarity, solubility etc. are some of the physical properties.
Thus, the physical properties is a characteristic property of matter that could be used to identify an unknown substance.
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Give an example of how human recreation could harm the environment. (0.5 point)
1. There are 42 grams of sugar (C12H22O11) in a can of pop (342mL). Use this information (where necessary) to answer the following questions:
a) How many moles of sugar are there in the pop (3 marks)?
b) If a mole of sugar costs 90 cents, what is the value of the sugar in a can of pop (3 marks)?
c) How many particles of sugar are there in the pop (3 marks)?
The number of sugar particles is 7.4 * 10^22 particles.
What is the mole?The mole is used to describe the amount of substance. The idea was first introduced by Professor Avogadro and the number of particles that constitute one mole of a substance was said to be 6.02 * 10^23 particles in a mole.
Thus;
Molar mass of sugar = 342 g/mol
Number of moles of sugar = 42 grams/342 g/mol = 0.123 moles
Now;
If 1 mole of sugar costs 90 cents
0.123 moles of sugar costs 0.123 moles * 90 cents/1 mole
= 11 cents
Now we know that;
1 mole of sugar contains 6.02 * 10^23 particles
0.123 moles of sugar contains 0.123 moles * 6.02 * 10^23 particles / 1 mole
= 7.4 * 10^22 particles
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Three different rocks that each weigh 50 grams are put out in the sunlight. After two hours, they are all at the same temperature. Pick the true statement.
Answer:
All rocks have same thermal conductivity.
Explanation:
Rocks are heated with the sunlight exposure. Different types of rocks have different thermal conductivity. The heat energy of the rocks is measure in Joules. The size and thermal conductivity of the rocks is important property which determines their heating capacity.
how many helium atoms are in a mole of helium?
Answer:1 mole of helium gas contains 6.02 x1023 helium atoms
Explanation:I hope this helps
What is the concentration of a solution made by diluting 55 mL of 6.0 M HCl to a final volume of 750 mL
Answer: Ernest Z. The concentration would be 0.76 mol/L.
Sulfur is a non metallic material that has a density of 2g/cm3. The volume of a sample of sulfur was measured to be 5.0cm3. What is the density of the wood?
question: Sulfur is a non metallic material that has a density of 2g/cm3. The volume of a sample of sulfur was measured to be 5.0cm3. What is the mass of the sulfur
Answer:
0.01 kg
Explanation:
Density: This can be defined as the ratio of mass of a body and it's volume. The S.I unit of volume is kg/m³.
Therefore,
Density = mass/volume
D = m/V......................................................... Equation 1
making m the subject of the equation
m = D×V ................................... Equation 2
Given: D = 2 g/cm³ = 2000 kg/m³, V = 5.0 cm³ = 0.000005 m³
subtitute into equation 2
m = 2000×0.000005
m = 0.01 kg or 10 g
84.9 g of solid iron reacts with oxygen gas forming iron(III) oxide. How many moles of oxygen will react
Answer:
1.14 moles of oxygen will react
Explanation:
The balanced equation of reaction between iron and oxygen is
4 Fe + 3 O₂ → 2 Fe₂O₃
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
Fe: 4 molesO₂: 3 molesFe₂O₃: 2 molesThe molar mass of iron being Fe 55.85 g/mole, then the following amount of mass reacts by stoichiometry: 4 moles* 55.85 g/mole=223.4 g
You can apply the following rule of three: if by stoichiometry 223.4 grams of Fe react with 3 moles of O₂, 84.9 grams of Fe react with how many moles of O₂?
\(moles of O_{2} =\frac{84.9 grams of Fe*3 moles ofO_{2} }{223.4 grams of Fe}\)
moles of O₂= 1.14 moles
1.14 moles of oxygen will react
A solution contains 358.8g of sodium, 7.8g of
hydrogen and 41.6g of oxygen. What is the
empirical formula of the compound present in
the solution?
Ar of Sodium = 23
Ar of Hydrogen = 1
Ar of Oxygen = 16
Just the atoms that make up a molecule are shown using the empirical formula.
What exactly is an empirical formula?
In contrast to theory or belief, empirical research develops knowledge from actual experience based on observable and quantifiable phenomena.
An empirical formula is a chemical formula for a compound that only specifies the ratios of the elements present in the compound and not the exact number or arrangement of atoms.
Simply displaying the atoms that make up a molecule using the empirical formula is typical. This is useful if you want to recognize the elements you're working with quickly. When determining how many atoms of each element are present, the molecular formula is useful.
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Which of the following would cause the greatest decrease in GFR in a person with otherwise normal kidneys?a. Decrease in renal arterial pressure from 100 to 80 mmHg in a normal kidneyb. 50% increase in glomerular capillary filtration coefficientc. 50% increase in proximal tubular sodium reabsorptiond. 50% decrease in afferent arteriolar resistancee. 50% decrease in efferent arteriolar resistancef. 5 mmHg decrease in Bowman's capsule pressure
Answer: 50% decrease in afferent arteriolar resistance
Explanation: This is because the afferent arteriole is responsible for supplying blood to the glomerulus, where filtration occurs. If the resistance of the afferent arteriole decreases, more blood will flow into the glomerulus, increasing the hydrostatic pressure and causing an increase in GFR. Conversely, if the resistance of the afferent arteriole increases, less blood will flow into the glomerulus, decreasing the hydrostatic pressure and causing a decrease in GFR.
Which of the following is an element? aluminum bronze table salt brass
Answer:
Aluminum is an element
Explanation:
Aluminum is the most abundant metal in the earths crust with an atomic number of 13.
1 point
Frank has a liquid. It has a mass of 6.5 g and a density of 0.72 g/mL. What is its volume?
Answer:
9.03 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
\(volume = \frac{mass}{density} \\\)
From the question we have
\(volume = \frac{6.5}{0.72} \\ = 9.027777...\)
We have the final answer as
9.03 mLHope this helps you
Consider the following pair of reactions. Predict the type of substitution mechanism, predict which reaction of the pair will occur at the faster rate, and draw the correct organic product
The reaction with S_N₂mechanism is likely to be faster than the reaction with S_N₂ mechanism. This is because the carbocation intermediate formed in S_N₁ mechanism is more stable.
The pair of reactions given below is:
CH₃Cl + NaOH→CH₃OH + NaCl
CH₃I + NaOH→CH₃OH + NaI
The type of substitution mechanism:
The first reaction involves S_N₁ mechanism (unimolecular nucleophilic substitution). The second reaction involves S_N₂ mechanism (bimolecular nucleophilic substitution).
Prediction of the reaction that will occur at a faster rate:
The reaction with S_N₁ mechanism is likely to be faster. The rate of this reaction mainly depends on the stability of the carbocation intermediate formed after the initial step. In this case,CH₃Cl reacts to form a tertiary carbocation which is more stable than the primary carbocation formed in CH₃I.
Drawing the correct organic product:
CH₃Cl + NaOH→CH₃OH + NaCl
CH₃I + NaOH→CH_3OH + NaI
CH₃C reacts with NaOHin an S_N₁ mechanism to produceCH₃OH and NaCl.
CH₃ reacts withNaOH in an S_N₂mechanism to produce CH₃OH and NaCI.
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for the best system, calculate the ratio of the masses of the buffer components required to make the buffer.
To calculate the ratio of the masses of the buffer components required to make the best buffer system, identify the buffer components, determine the desired pH, use the Henderson-Hasselbalch equation to find the ratio of concentrations, and then convert the concentrations to masses using the molar masses of the components.
To calculate the ratio of the masses of the buffer components required to make the best buffer system, follow these steps:
1. Identify the buffer components: Typically, a buffer system is made up of a weak acid and its conjugate base or a weak base and its conjugate acid.
2. Determine the desired pH of the buffer: The optimal buffering capacity occurs when the pH of the solution is close to the pKa of the weak acid or weak base.
3. Use the Henderson-Hasselbalch equation: The equation is pH = pKa + log([A⁻]/[HA]), where pH is the desired pH, pKa is the acid dissociation constant of the weak acid, [A⁻] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.
4. Solve for the ratio of concentrations: Rearrange the equation to find the ratio of [A⁻] to [HA], which represents the ratio of the masses of the buffer components: [A⁻]/[HA] = 10^(pH-pKa).
5. Convert concentrations to masses: Use the molar masses of the buffer components to convert the ratio of concentrations to the ratio of masses.
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TRUE OR FALSE
- during all chemical reactions, the mass of the products is never equal to the mass of the reactants
- Mass is sometimes lost in chemical reactions
- The Law of Conservation of Mass states that mass is not conserved
During all chemical reactions, the mass of the products is never equal to the mass of the reactants.
- FALSE
Mass is sometimes lost in chemical reactions.
- FALSE
The Law of Conservation of Mass states that mass is not conserved.
- FALSE