The oxidation number of O in CH3OH is -2 and the oxidation number of H is +1 and C atom has an oxidation number of -3.
The oxidation number of an atom is defined as the charge that atom would have if the compound was composed of ions. The oxidation number of an atom is zero in a neutral substance which contains atoms of only one element. It does not represent the "real" charge on that atom or any other actual atomic property. It is in high oxidation states, where the ionization energy required to produce a multiply positive ion is far greater than the energies available in chemical reactions. Generally the oxidation states of atoms in a given compound may vary depending on the choice of electronegativity scale used in their calculation.
In CO, C has an oxidation number of +2 and in H2, H has an oxidation number of zero.
So in CH3OH, C atom has an oxidation number of -3, the oxidation number of O is -2 and the oxidation number of H is +1.
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The complete question is,
Assign an oxidation number to each element in the reaction.
CO(g) + 2H2(g) → CH3OH(g)
In CO, the oxidation number of C is _, and that of O is _.
In H2, the oxidation number of H is _.
In CH3OH, the oxidation number of C is _, that of O is _, and that of H is _.
What biomolcule is important for the make up of DNA and RNA?
A. Nucleic Acids
B. Proteins
C. Carbohydrates
D. Lipids
Option A Nucleic Acids are a type of DNA is correct for Biomolecules play a crucial role in the synthesis of DNA and RNA.
The genetic code of an organism—the order of nucleotides that determines the amino acid sequence of proteins—is uniquely stored by nucleic acids, specifically DNA and RNA, which are essential to life on Earth. Carbohydrates, lipids, proteins, and nucleic acids are the four main classes of biological macromolecules. Each is a vital part of the cell and carries out a variety of tasks. These molecules make up most of a cell's mass when they are all combined.
Any of the numerous substances produced by cells and living things is referred to as a biomolecule, also known as a biological molecule. Biomolecules come in a wide variety of shapes and sizes and serve a wide range of purposes. Proteins, lipids, nucleic acids, and carbohydrates are the four main categories of biomolecules.
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help with chemistry pls!
5.7 grams of magnesium will yield 0.2347 moles of H2.
How can you distinguish H2 from Mg moles?Exactly 1 mole of Mg will result in 1 mole of H2. Thus, we need to calculate how many moles of magnesium there are in 10.0 grams: Amount of moles of magnesium equals (mass of magnesium)/(its molar mass)=(10.0g/24.31g) =0.4114mol for mol. As a result, the stoichiometry predicts that precisely 0.4114 mol of H2 will be created. Thus, we can infer that 1 mole of magnesium yields 1 mole of hydrogen gas.
H2 with MgCl2 Equals Mg + 2 HCl.
We can deduce from the equation that 1 mole of magnesium yields 1 mole of hydrogen.
Magnesium has a molar mass of 24.31 g/mol.
Divide the mass by the molar mass to see how many moles of magnesium are present in 5.7 grams:
moles of Mg = 5.7 g / 24.31 g/mol = 0.2347 mol
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why is chlorine used to water treatment?
Answer:
To prevent contamination with germs
Explanation:
The main objective of chlorine addition is to disinfect the water and maintain chlorine residuals that will remain in the water as it travels through the distribution system
PLEASE HELP Consider the combustion for octane (C8H18), which is a primary component of gasoline.
2 C8H18 + 25 O2 -> 16 CO2 + 18 H2O
HOW MANY MOLES OF CO2 are emitted into the atmosphere when 26.6 g C8H18 is burned?
CO2 emitted: (blank) mol CO2
Answer: 1.86 moles of CO2
Explanation:
26.6 g C8H18 * (1 mole C8H18/ 114.26 g C8h18) * (16 mol CO2/ 2 mol C8H18) = 1.86 moles of CO2.
114.26 is the molar mass of C8H18: 8(12.01) + 18(1.01) = 114.26
How many bonds are broken in the reaction 2H₂O --> H₂ + 2O₂?
A.4 O-H bonds are broken.
B.2 H-H and 1 O=O bonds are broken.
C.2 H-H and 2 O=O bonds are broken.
D.2 O-H bonds are broken.
Explanation:
Option C. 2 H-H and 2 O=O bonds are broken is the correct answer.
In the reaction 2H₂O → H₂ + 2O₂, two water molecules are broken down into hydrogen gas and oxygen gas. Each water molecule contains two O-H bonds and one O=H bond. Therefore, in the reaction, a total of four O-H bonds and two O=H bonds are broken. However, the question specifically asks for the number of bonds broken, not the number of bonds broken of a certain type.
To determine the total number of bonds broken, we can count the number of atoms on both sides of the reaction. The reactant side has 4 hydrogen atoms and 4 oxygen atoms, while the product side has 2 hydrogen atoms and 4 oxygen atoms. This means that a total of 4 H-O bonds and 4 O-O bonds are broken in the reaction.
Since each O=O bond consists of one O-O bond, a total of 2 O-H bonds and 2 O=O bonds are broken in the reaction. Therefore, option C. 2 H-H and 2 O=O bonds are broken is the correct answer.
Discussion Topic!
In the SI system of units, the mole is one of seven base units. It is frequently used in chemical calculations.
However, a mole of something is just a particular quantity of it. it is not a unit of measure in the way that meters, seconds, and kilograms are. calculations performed with the number of moles of a substance could also be performed with the number of particles of a substance. Based in this information, do you think that the mole should be considered a base unit in the Si system?
Explain why or why not?
The mole makes up one of the seven base units inside the SI system for measurements. Calculations involving chemicals typically use it. A mole of something, however, is simply a specific amount of it.
What sorts and numbers of creatures exist?There are many different kinds of organisms, including producers, consumers, herbivores, carnivores, scavengers, parasite, predators, or decomposers. Producers: When an organism uses basic materials to create its own sustenance, it really is known to as a Producer.
Based on the composition of their cells, what are the two primary categories of organisms?Prokaryotic and eukaryotic cells are the two categories into which all living things can be categorised based on the arrangement of their cellular structures. Eukaryotic cell types can be found in algae, animals, fungus, plants, protozoans, and fungi. Only prokaryotic cell types are found in bacteria.
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A person who has the condition CIPA is unable to feel pain or temperature. Which sensory reptors are affected by this condition
CIPA patients are unable to recognise painful stimuli including cuts, burns, and fractures, which can lead to recurrent wounds and infections. Moreover, they could miss temperature changes, which could result in hyperthermia.
What medical condition prevents you from feeling pain?The disease known as congenital insensitivity to pain and anhydrosis (CIPA) is highly rare and hazardous. CIPA patients are unable to feel pain [1]. These individuals' brain regions that receive pain signals have improperly linked pain-sensing nerves.
What does it signify when you lose the ability to sense pain?Summary. You cannot feel discomfort or perspire if you have the rare genetic condition CIPA. It results from a gene abnormality that prevents the normal development of autonomic and sensory nerves. You might not be aware of when you are injured due to the absence of discomfort.
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Identify the number of each atom in the reactants and products for this balanced reaction.
The number of Na atoms in the reactants is 2 and the number of Na atoms in the products is also 2.
Reactants are the substances that take part in a chemical reaction and are changed during the reaction. Products are the substances that are created as a result of the chemical reaction.In a chemical reaction, the reactants are transformed into products, and the total amount of matter remains the same.
The balanced equation for this chemical reaction is:
2NaN3(s) ⟶ 3N2(g) + 2Na(s)
In the reactants, there are 2 atoms of Na (Na) and 3 atoms of N (N3). In the products, there are 3 atoms of N (N2) and 2 atoms of Na (Na).
Therefore, the number of Na atoms in the reactants and products is 2.
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Complete question:Automobile airbags inflate due to the formation of nitrogen gas from the chemical reaction.
2NaN3(s)->3N2(g)+2Na(s).
Identify the number of each atom in the reactants and products for this balanced reaction.
whats the combining power of an element called?
How much energy is required to melt a 20.lb bag of ice at 0 degrees Celsius? A pound (lb.) of ice is equivalent to 0.4536kg. The triangleH fusion of ice is +6.009kj/mol
The energy required to melt a 20 lb. bag of ice at 0 degrees Celsius is approximately 3028 kJ.
StepsTo calculate the energy required to melt a 20 lb. bag of ice at 0 degrees Celsius, we can use the following steps:
Convert the mass of ice from pounds to kilograms:
20 lb. × 0.4536 kg/lb. = 9.072 kg
Calculate the number of moles of ice using the molar mass of water:
1 mol H2O = 18.01528 g
9.072 kg = 9072 g
9072 g ÷ 18.01528 g/mol = 503.99 mol
Calculate the energy required to melt the ice using the enthalpy of fusion of water:
ΔHfusion = +6.009 kJ/mol
The energy required = ΔHfusion × moles of ice
Energy required = 6.009 kJ/mol × 503.99 mol
Energy required = 3028 kJ
Therefore, the energy required to melt a 20 lb. bag of ice at 0 degrees Celsius is approximately 3028 kJ.
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A 57. 17 g sample of ba(oh)2 is dissolved in enough water to make 1. 800 l of solution. How many ml of this solution must be diluted with water in order to make 1. 000 l of 0. 100 m ba(oh)2?.
Molarity is a measure of the concentration of a solution. It is defined as the number of moles of solute dissolved in one liter of solution. The symbol "M" denotes it, and its units are moles per liter (mol/L).
how to calculate the initial concentration of the Ba(OH)2 ?Molarity = moles of solute/volume of solution in liters
M1 = 0.3307 moles / 1.800 L
M1 = 0.1837 M
Now we can use the equation above to solve for V1:
(0.1837 M) (V1) = (0.100 M) (1.000 L)
V1 = (0.100 L) / (0.1837 M)
V1 = 0.544 L
V1 = 544 mL
Therefore, 544 mL of the original Ba(OH)2 solution must be diluted with water to make 1.000 L of 0.100 M Ba(OH)2 solution.
Is Ba(OH)2 a hazardous chemical?Barium hydroxide (Ba(OH)2) is a hazardous chemical acid that can cause harm if improperly handled. It is classified as a dangerous substance and is regulated by the Occupational Safety and Health Administration (OSHA) in the United States.
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For the antimony trichloride system, we assume only dilution when calculating concentrations. Are the concentrations of sbcl3, h+ and cl- actually larger than, smaller than or the same as the calculated concentrations when distilled water was added to the system?.
Chlorine reacts with antimony, antimony tribromide, antimony trioxide, or antimony trisulfide to create antimony trichloride. Antimony trioxide can also be processed using strong hydrochloric acid to create it.
What is the purpose of the antimony trichloride test?It serves as a reagent for the detection of carotenoids linked to vitamin A and forms a blue complex with the carotenoid that can be detected using colorimetry (the Carr-Price test). Stubs of horn from calves and goats were formerly removed and dissolved using solutions of antimony trichloride.
By reducing antimony trioxide at a high temperature with potassium cyanide, pure antimony may be easily produced in a lab setting. The technique is affordable and yields the product virtually quantitatively (up to 98%).
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PLEASE HELP ME
Balance the chemical equation
Answer:
8Ag2S => 16Ag + S8
Explanation:
8Ag2S => 16Ag + 1S8
Ag = 8 x 2 = 16
S = 8
by what factor is the average kinetic energy of the particles as a substance decreased if the temperature is decreased from 819 °C to 0°C
The average kinetic energy of the particles is reduced by a factor of (723/819)2 = 0.60, assuming the substance is an ideal gas.
What is kinetic energy?The energy an object possesses as a result of its motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The relationship between kinetic energy and an object's mass and square of its velocity is direct.
When an object is moving, it has kinetic energy, which is computed using the formula KE = 1/2mv2, where m is the object's mass and v is its velocity. Calculating the amount of energy required to halt a moving object is just one practical use for the fundamental physics idea of kinetic energy.
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How many times would a mole of coke cans, stacked one on top of another, reach from here to Venus and back? Pls provide work
Mole of Coke cans (which is approximately 6.02 x 10²³ cans) would reach from here to Venus and back approximately (6.67 x 10¹¹ cans) / (6.02 x 10²³ cans/mol) = 1.11 x 10⁻¹² moles.
What is mole?Mole is widely used in chemistry as a way to express amounts of reactants and products of chemical reactions.
Total distance traveled = distance from Earth to Venus and back = 2 x 40,000,000,000 meters
So, Number of cans needed = Total distance traveled / height of one can
= (2 x 40,000,000,000 m) / (0.12 m)
= 6.67 x 10¹¹ cans
Therefore, a mole of Coke cans (which is approximately 6.02 x 10²³ cans) would reach from here to Venus and back approximately (6.67 x 10¹¹ cans) / (6.02 x 10²³ cans/mol) = 1.11 x 10⁻¹² moles.
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A certain organic compound contains only c, h, and o. Combustion of 0. 1000 g of this compound produced 0. 2921 g of co2 and 0. 0951 g of h2o. What is the empirical formula of the compound?.
Answer: C33H53O3
Explanation:
1.) Convert grams of CO2 to grams of C
Convert grams of H2O to grams of H
2.) Subtract the total amount of grams ( 0.1000g) by the grams of C and grams of H to find grams of O.
3.) Convert grams of each substance to moles of each substance.
4.) Divide the moles of each substance by the smallest amount of moles to find the subscripts of each element. Since the answer for hydrogen is not close to a whole number, you must multiply each of the answers by the smallest whole number that would result the answer to be closer to a whole number.
5.) The final answer is C33H53O3
the molar absorptivity of a compound at 500 nm wavelength is 252 M^-1 cm^-1. Suppose one prepares a solution by dissolving 0.00140 moles of a solute in enough water to make 500.0 mL solution. What would be the absorbance in a 7.00 mm pathlength cell
Answer: The absorbance of a compound, with a molar absorptivity at 500 nm wavelength of 252 M⁻¹ cm⁻¹, prepared by dissolving 0.00140 moles of a solute in enough water to make a 500.0 mL solution, measured in a 3 .00 mm pathlength cell, is 0.212.
First, we will calculate the molarity of the compound, which is equal to the moles of solute divided by the liters of solution.
Then, we will convert 3.00 mm to cm using the conversion factor 1 cm = 10 mm.
Finally, we will calculate the absorbance of the compound using the Beer–Lambert equation.
where,
A: absorbance
ε: molar absorptivity
b: length of light path
C: molar concentration
what happens to light waves to make it look smaller
Answer:
Waves traveling from the deep end to the shallow end can be seen to refract (i.e., bend), decrease wavelength (the wave fronts get closer together)
Explanation:
If light passes through smaller openings, often called slits, you can use Huygens's principle to show that light bends as sound does. The bending of a wave around the edges of an opening or an obstacle is called diffraction. Diffraction is a wave characteristic that occurs for all types of waves.
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Match the solution with the correct concentration.
The solution with correct concentration is -- 4 m: One kilogram of water contains 4 moles of H₂SO₄ (molality )
4M : One Liter of water contains four moles of H₂SO₄ (molarity)4 Molal : When 4 moles of the solute are dissolved in 1 kilogram of solvent—usually water—this is referred to as a solution concentration. 4 Molar: A solution concentration in which 4 moles of the solute are dissolved in 1 Liter of solvent, typically water, is referred to as this.In chemistry, what does concentration mean?In chemistry, the abundance of a component divided by the total volume of a mixture is what is meant by the term "concentration." Quantitative descriptions can be broken down into four categories: concentrations of mass, molarity, number, and volume are all measured in these units.
The term "concentration" can be used to describe any combination of chemicals, but solutes and solvents in solutions are the most common examples. There are two types of molar concentration, also known as quantity: osmotic concentration and the standard concentration.
What is molality ?The "total moles of a solute contained in a kilogram of a solvent" is how molality is measured. Molal concentration is another name for molality. It is a measurement of how much solute is in a solution.
Incomplete question :
Match the solution with the correct concentration.
4 m:
4 M:
4 Molal:
4 Molar
1. 4 moles of H₂SO₄ are placed into 1 Liter of water
2. 4 moles of H₂SO₄ are placed into 1 kg of water
3. a solution concentration where 4 moles of solute are dissolved in 1 kg of solvent
4. a solution concentration where 4 moles of solute are dissolved in 1 Liter of solvent
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Which development started a large movement of settlers to California?(1 point)
Responses
manifest destiny
manifest destiny
gold rush
gold rush
cattle drive
cattle drive
Transcontinental Railroad
The Transcontinental Railroad was the main development that started a large movement of settlers to California. It was the first railway line to span the entire continent, connecting the east and west coasts of the United States.
The railroad greatly facilitated migration and allowed for widespread settlement of the West. It improved communication between the east and west coasts, sped up transportation, and made it possible for a more productive interchange of goods.
Also, the railroad made it possible for prospectors to reach California in search of the California Gold Rush. Also, the railroad made it possible for cattle ranchers to transport their herds of cattle to the California stockyards.
As a result, there was more beef available, which aided in the state's agriculture sector's expansion. Also, the railroad offered an effective way to ship mining and agricultural goods to the east coast.
Hence, the Transcontinental Railroad served as the main driving force behind the massive migration of settlers to California.
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An engineer is experimenting with two identical magnetic roller coaster cars on different sides of a center magnet that cannot move. The engineer is planning to move one car one space. Which movement will result in the largest increase in potential energy?
Moving the car furthest away from the center magnet by one space will result in the largest increase in potential energy.
What is potential energy?Potential energy is the energy that an object possesses due to its position or configuration in a system. It is stored energy that can be converted into kinetic energy or other forms of energy.
How is potential energy related to magnetic roller coasters?Magnetic roller coasters use magnets to propel roller coaster cars along a track. The magnets create a magnetic field that interacts with the magnetic field of the roller coaster car, resulting in a force that propels the car forward. The potential energy of the roller coaster car is highest when it is at the top of a hill, where it has the most gravitational potential energy. As the car moves down the hill, its potential energy is converted into kinetic energy, and the car gains speed.
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what is the pressure of a sample of gas at a volume of 0.4250 L if it occupies 2.50L at 93.5 MM Hg.
Answer:
The pressure of the gas sample at a volume of 0.4250 L is 551.8 mmHg.
Explanation:
We can use the combined gas law to solve this problem:
P1V1/T1 = P2V2/T2
P1, V1, and T1 are the initial pressure, volume, and temperature, and P2, V2, and T2 are the final pressure, volume, and temperature.
We can rearrange this equation to solve for P2:
P2 = (P1 x V1 x T2) / (V2 x T1)
We are given:
P1 = 93.5 mmHg
V1 = 2.50 L
V2 = 0.4250 L
T1 and T2 are assumed to be constant (not given)
Substituting these values into the equation, we get:
P2 = (93.5 mmHg x 2.50 L x T2) / (0.4250 L x T1)
Simplifying, we get:
P2 = 551.8 mmHg
The pressure of the gas sample at a volume of 0.4250 L is 551.8 mmHg.
You need to make a 0.93 M solution of NaCl using a 250 mL volumetric flask. How many
grams of NaCl do you need? Round to the hundredths place (0.01)
The formula below can be used to create a [tex]0.93 M[/tex] NaCl solution in a [tex]250 mL[/tex] volumetric flask:
What cause the change in molarity of the solution?Molarity is calculated as moles of solute per litre of solution. To solve for moles of solute, rewrite the formula as follows:
Molarity times the volume of the solution in litres equals moles of solute. The volume of NaCl solution required to create the [tex]0.93 M[/tex] Solution must first be determined.
We must fill the flask with NaCl solution until the mark on the neck of the flask because we are using a [tex]250 mL[/tex] Volumetric flask. Hence, we require [tex]250 mL[/tex] Of NaCl solution.
To change mL to L:
[tex]250 mL / 1000 mL/L = 0.25 L[/tex] Is the volume of the solution in litres.
Now, we can determine how many moles of NaCl are required:
[tex]0.93[/tex] M times [tex]0.25 L[/tex] equals [tex]0.2325[/tex] Moles of NaCl.
Using its molar mass, we can finally convert moles of sodium chloride into grams of sodium chloride:
NaCl's mass is equal to its moles times its molar mass.
[tex]58.44[/tex] g/mol is the molar mass of NaCl.
NaCl mass is equal to [tex]0.2325[/tex] moles times [tex]58.44[/tex] g/mol, or [tex]13.59 g[/tex].
Therefore, [tex]13.59[/tex] grams of NaCl are required to make [tex]0.93 M[/tex] in a [tex]250 mL[/tex]Volumetric flask. The solution, rounded to the hundredths place, is [tex]13.59[/tex] g.
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Determine [OH−] of a solution that is 0.230 M in HCO3−. (Ka1 for H2CO3 is 4.3×10−7)
The solution contains 9.999 x 1014 M of hydroxide ions.
In order to determine the hydroxide ion concentration in the solution, we need to use the Ka1 value of H2CO3 and the given HCO3− concentration. We can write the following acid-base reaction to calculate the OH− concentration:
H2CO3 + H2O (l) ↔ H3O+ + HCO3−
The Ka1 value represents the equilibrium constant for this reaction. By entering the specified values, we obtain:
[H3O+] = Ka1 x [HCO3−] = (4.3×10−7)(0.230) = 0.00010 M
Since [H3O+] + [OH−] = 1 x 10−14 M, we can calculate the [OH−] as:
[OH−] = 1 x 10−14 - 0.00010 = 9.999 x 10−14 M
Therefore, the hydroxide ion concentration in the solution is 9.999 x 10−14 M.
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How is evaporation related to the vapor pressure of the liquid.
PLEASE HELP ASAP
USE HOMEOSTASIS TERMS + STEPS TO EXPLAIN YOUR ANSWERS (the pictures given)
GIVING OUT 20 POINTS FOR THIS!!
Scientists should be very concerned about the fact that this new toxin inhibits Na+ channels and might be harmful to organisms.
What this would mean to an organism?Because oestrogen and progestin combinations inhibit ovulation, my medication will be a steroid hormone. Additionally, they alter the mucus at the cervix to stop sperm from entering and the uterine lining to stop pregnancy from forming.
A. Depolarization is taking place as the action potential in neuron B compared to neuron A rises from a negative to a positive potential.
B. Na+ ions have the greatest impact at time 0. The electric potential becomes positive due to the inward migration of Na+ ions, causing the cell to depolarize.
C. The depolarization is brought on by the inward influx of Na+ ions through voltage-gated Na+ channels.
D. When the current reaches its peak, the K+ outward current will begin and the inward current will cease, allowing the neuron to experience repolarization.
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why most metals have high thermal conductivity, but covalent solids do not
Answer:
Thermal conductivity mainly depends upon free electrons, Normal metal have huge atomic radius and easily removable electrons, Thus it conducts heat well.
Covalent solids have high electronegativity and tend to keep their electrons as a result, they are bad conductors.
Explanation:
In this reaction, 28.7 g of lithium nitrate reacts 14.5 g of barium
sulfate. What will be the mass of the products?
LINO3+ BaSO4 → Products
Answer:ABOMC5LDECEVCEC
A sample of 9.85 g of solid calcium hydroxide is added to 30.5 mL of 0.380 M aqueous hydrochloric acid.
Write the balanced chemical equation for the reaction. Physical states are optional.
What is the limiting reactant?
How many grams of salt are formed after the reaction is complete?
How many grams of the excess reactant remain after the reaction is complete?
Answer:
Explanation:
Balanced chemical equation: Ca(OH)2(s) + 2HCl(aq) → CaCl2(aq) + 2H2O(l).
Limiting reactant: To find out, calculate the number of moles of each reactant.
Grams of salt formed: Calculate the moles of the limiting reactant, then use stoichiometry to find the moles of salt formed, and finally convert to grams.
Grams of excess reactant remaining: Calculate the moles of the limiting reactant, then use stoichiometry to find the moles of excess reactant consumed, and finally subtract from the initial moles of the excess reactant to find how many moles (and then grams) remain.
A compound is found to contain 30. 45 % nitrogen and 69. 55 % oxygen by mass. What is the empirical formula for this compound?.
Answer: NO2
Explanation:
Assume 100 grams of a substance so that %=mass in grams
1.) Convert both into moles of each substance
30.45 g N * (1 mol N/ 14.01 g N) = 2.173 mol of N
69.55 g O * (1 mol O/ 16.00 g O) =4.347 mol of O
2.) divide both by the smallest number of moles, in this case 2.173, to find subscripts of each element.
2.173/ 2.173= 1
4.347/ 2.173= 2
Therefore the empirical formula is NO2
