The empirical formula is Diphenyl ether. 2-Phenylphenol, or o-phenylphenol.
For the empirical formula of a compound, you need to find the simplest, whole-number ratio of the elements present in the compound. The given molecular formula is C12H10O.
1. Determine the number of moles for each element:
Carbon (C): 12 moles
Hydrogen (H): 10 moles
Oxygen (O): 1 mole
2. Find the simplest, whole-number ratio by dividing each mole value by the smallest number of moles (which is 1 in this case):
C: 12 moles / 1 = 12
H: 10 moles / 1 = 10
O: 1 mole / 1 = 1
So, the empirical formula is Diphenyl ether. 2-Phenylphenol, or o-phenylphenol.
vanuation Question
1. What is the number one killer of teenagers?
O Speeding
Reckless driving
Driving under the influence
O Distracted driving
1.
The ___________ energy in a mechanical system is determined by adding the potential and kinetic energy together.
total
massive
2.
The initial ___________ energy is equal to zero because the starting point is set at zero height to make things easier.
kinetic
potential
3.
In the example, the final kinetic energy is determined to be ___________ because at the peak height, the ball instantaneously stops.
positive
zero
negative
4.
In this system, potential and kinetic energy are ________________ proportional.
inversely
directly
Answer:
1. total
2. potential
3. zero
4. inversely
Explanation:
The total energy in a mechanical system is determined by adding the potential and kinetic energy together. The initial potential energy is equal to zero because the starting point is set at zero height to make things easier.
What is mechanical energy ?The sum of kinetic energy and potential energy in an object is called its mechanical energy. Therefore, the first statement is completed as:
The total energy in a mechanical system is determined by adding the potential and kinetic energy together.
The initial potential energy is equal to zero because the starting point is set at zero height to make things easier. In the example, the final kinetic energy is determined to be zero because at the peak height, the ball instantaneously stops.
In this system, potential and kinetic energy are inversely proportional to each other. Because, as the kinetic energy increases with a decrease in potential energy.
Find more on mechanical energy:
https://brainly.com/question/29408366
#SPJ6
The mass of the electron is
about equal to the neutron.
almost the same as the proton.
very small compared to the proton.
very large compared to the neutron.
light
2:21
Tools
is a chemical released at a stressful time.
Oxygen
Glucose
Carbon dioxide
Adrenaline
Answer:
carbon dioxide
Explanation:
Answer:
Adrenaline
Explanation:
Adrenaline is a chemical released when you are in stress or, to coin it better, in "panic mode". It helps boost your stamina, and gears you towards flight in the fight v. flight response. However, when needed, you have that extra boost of stamina in case you do need to fight. Your blood pressure will rise, and your heart will beat faster, as well as you feeling your muscles tense up and body heating up.
Which is NOT one way used to collect empirical evidence?
A. Sight
B. Taste
C. Extra sensory perception
D. Hearing
Final answer:
Extra sensory perception is not a method used to collect empirical evidence. Empirical data is typically gathered using the five senses: hearing, sight, taste, touch, and smell.
Explanation:
The correct answer to the question of which method is NOT used to collect empirical evidence is C. Extra sensory perception. Empirical evidence is data and information obtained through observation and experimentation, and is typically gathered using the five senses: hearing, sight, taste, touch, and smell. Each of these senses provides a different type of sensory input or information about the world around us, enhancing our understanding and facilitating the collection of empirical data. For example, sound information through hearing can be used to perceive and analyze waves, taste information helps in food and chemical analysis, while smell information plays a role in the detection of substances. Extra sensory perception, however, is not a scientifically recognized or reliable method for collecting empirical evidence.
What is the mass percent of Iron in Iron III Carbonate? *
Answer:
what im lost
Explanation:
Final answer:
The mass percent of iron in Iron (III) Carbonate is calculated by dividing the molar mass of iron by the total molar mass of the compound and then multiplying by 100%, resulting in approximately 38.3%.
Explanation:
To find the mass percent of Iron in Iron (III) Carbonate (Fe₂(CO₃)₃), we first need to calculate the molar mass of the compound and then the molar mass of iron within it. The molar mass of Iron (III) Carbonate is obtained by adding together the molar masses of 2 moles of iron (Fe), 3 moles of carbon (C), and 9 moles of oxygen (O). The molar mass of Fe is approximately 55.85 g/mol, that of C is about 12.01 g/mol, and O is approximately 16.00 g/mol.
To calculate the molar mass of Fe₂(CO₃)₃:
Molar mass of Fe: 2 × 55.85 g/mol = 111.7 g/molMolar mass of C: 3 × 12.01 g/mol = 36.03 g/molMolar mass of O: 9 × 16.00 g/mol = 144 g/molTotal molar mass = 111.7 g/mol + 36.03 g/mol + 144 g/mol = 291.73 g/mol
Next, we find the mass percent of Fe by taking the molar mass of Fe and dividing it by the total molar mass of the compound, then multiplying by 100% to convert it into a percentage:
Mass percent of Fe = (Molar mass of Fe / Total molar mass of compound) × 100% = (111.7 g/mol / 291.73 g/mol) × 100% ≈ 38.29%
Therefore, the mass percent of iron in Iron (III) Carbonate to three significant digits is approximately 38.3%.
When humans burn fossil fuels, most of the carbon quickly enters the_______
as carbon dioxide.
•hydrosphere
•atmosphere
•geosphere
•biosphere
Answer:
Atmosphere.
Explanation:
Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas.
round 23,455 into 4 significant figures: ______ cm 23.46
23.40
23.45
Answer:
23.46
Explanation:
What objects do magnets stick to?
Answer:magnets, iron, cobalt, nickel, steel (because it is mostly iron), manganese, gadolinium and lodestone.
Explanation:
Hope I helped
I NEED HELP NOW YOU CAN TAKE ALL MY POINTS JUST PLEASE ANSWER AND MAKE SURE ITS GOOD!!!!!
Below is a solubility curve to help you answer the following questions.
Another student is attempting to make a saturated solution of KCl. The student added 30 g of KCl to 100 g of water at 60℃. What more does the student need to do to create a saturated KCl solution?
Claim: What more does the student need to do to create a saturated KCl solution?
Evidence: Use data from the solubility curve to identify the number of grams of KCl needed at 60℃ to create a saturated solution.
Reasoning: Use your knowledge of the relationship between temperature and solubility to explain how you determined the saturation level of the solution at the given temperature. Be sure to define the terms you used.
As the temperature is increased, the solubility of potassium chloride will increase as they are directly proportional.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
Learn more about solubility,here:
https://brainly.com/question/22185953
#SPJ3
13. What instrument is used routinely to check a person's exposure to radiation?
Geiger counter
scintillation counter
film badge
moderating rod
(PLEASE HELP IMMEDIATELY)How are total
lunar eclipses and partial
lunar eclipses similar?
Answer:
Explanation:
They both have the same effect just one is whole and the other is half
Which value gives the number of particles in 1 mol of a substance? 6.02 Times. 1021 6.02 Times. 1022 6.02 Times. 1023 6.02 Times. 1024
Answer:
6.02 x10^23
Explanation:
just did it on edge
The value gives the number of particles in 1 mol of a substance is 6.02 Times. 1023. Therefore, option C is correct.
What is mol ?The International System of Units uses the mole (symbol: mol) as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022 * 1023 elementary entities.
The mole, often known as mol, is a SI unit that counts the particles in a given substance.One mole is equal to 6.02214179×1023 atoms, or other elementary units such as molecules.
Avogadro's number is another name for this number. Keep in mind that a mole is defined as a quantity of stuff. A mole is the amount (10) of material containing 6.02214 × 1023 particles. 1 mol = 6.02214 × 1023 particles.
Thus, option C is correct.
To learn more about mole, follow the link;
https://brainly.com/question/26416088
#SPJ5
Why is water from an aquifer more likely to be cleaner than water from other sources?
Select one:
because it rises to the surface near the ocean
because pollutants are filtered by rock and soil deep within Earth
because it receives water directly from precipitation
because it forms where fresh and salt water meet
Answer:
last one
Explanation:
Answer:
2nd one
Explanation:
Need some help with these problems
b. a 0.5 M solution containing 250 g of manganese (II) chloride (MnCl2)
c. a 0.4 M solution containing 290 g of aluminum nitrate (Al(NO3)3)
complete question:
Calculate the volume of each solution, in liters.
b. a 0.5 M solution containing 250 g of manganese (II) chloride (MnCl₂)
c. a 0.4 M solution containing 290 g of aluminum nitrate (Al(NO₃)₃)
Answer:
b. L ≈ 4.00 litres
c. L ≈ 3.4 litres
Explanation:
Molarity is the number of moles of solute per litre of solution. Together a solute and a solvent makes a solution. The formula for molarity can be represented below
M = number of moles of the solute(mol)/L
where
M = molarity
mol = number of moles of the solute
L = litre of the solution.
Therefore ,
The volume of each solution can be computed below
b. a 0.5 M solution containing 250 g of manganese (II) chloride (MnCl₂)
M = number of moles of the solute(mol)/L
number of moles of MnCl₂ = mass/molar mass
molar mass of MnCl₂ = 55 + 71 = 126 g/mol
number of moles of MnCl₂ = 250/126
number of moles of MnCl₂ = 1.9841 moles
0.5 = 1.9841/L
cross multiply
0.5L = 1.9841
L = 1.9841/0.5
L = 3.97
L ≈ 4.00 litres
c. a 0.4 M solution containing 290 g of aluminum nitrate Al(NO₃)₃
M = number of moles of the solute(mol)/L
number of moles = mass/molar mass
molar mass of Al(NO₃)₃ = 27 + 14 × 3 + 48 × 3 = 27 + 42 + 144 = 213
number of moles = 290/213 = 1.3615 moles
M = number of moles of the solute(mol)/L
0.4 = 1.3615/L
cross multiply
0.4L = 1.3615
divide both sides by 0.4
L = 1.3615/0.4
L = 3.4 litres
Calculate the heat needed to increase the temperature of 100. g water from 45.7 C to 103.5 C.
ΔHvaporization= 2260 J/g
Ch2o=1.90 J/g (gas)
Ch2o=4.18 J/g C (liquid)
Answer:
Total heat required to raise the temperature of water from 45.7°C to 103.5°C
= 249,362.4 J
Explanation:
The Heat required to raise the temperature of 100.0 g of water from 45.7°C to 103.5°C will be a sum of;
- The heat required to raise the 100 g of water from 45.7°C to water's boiling point of 100°C
- The Heat required to vaporize the 100 g of water at its boiling point
- The Heat required to raise the temperature of this vapour from 100°C to 103.5°C
1) The heat required to raise the 100 g of water from 45.7°C to water's boiling point of 100°C
Q = mCΔT
m = 100 g
C = 4.18 J/g.°C
ΔT = change in temperature = (100 - 45.7) = 54.3°C
Q = 100 × 4.18 × 54.3 = 22,697.4 J
2) The Heat required to vaporize the 100 g of water at its boiling point
Q = mL
m = 100 g
L = ΔHvaporization = 2260 J/g
Q = mL = 100 × 2260 = 226,000 J
3) The Heat required to raise the temperature of this vapour from 100°C to 103.5°C
Q = mCΔT
m = 100 g
C = 1.90 J/g.°C
ΔT = change in temperature = (103.5 - 100) = 3.5°C
Q = 100 × 1.9 × 3.5 = 665 J
Total heat required to raise the temperature of water from 45.7°C to 103.5°C
= 22,697.4 + 226,000 + 665
= 249,362.4 J
Hope this Helps!!!
Answer:
249362.4 J
Explanation:
The following were Data were obtained from the question:
Mass (M) = 100g
Initial temperature (T1) = 45.7°C
Final temperature (T2) = 103.5°C
Heat of vaporisation (ΔHv) = 2260 J/g
Specific heat capacity (C) of steam = 1.90 J/g
Specific heat capacity (C) of water = 4.18 J/g
To calculate the heat needed to increase the temperature of water from 45.7°C to 103.5°C, the following must be observed:
Step 1:
Determination of the heat needed to raise the temperature of water from
45.7°C to its boiling point 100°C.
This is illustrated below:
Mass (M) = 100g
Initial temperature (T1) = 45.7°C
Final temperature (T2) = 100°C
Specific heat capacity (C) of water = 4.18 J/g
Change in temperature (ΔT) = T2 – T1 = 100°C – 45.7°C = 54.3°C
Heat (Q1) =?
Q = MCΔT
Q1 = 100 x 4.18 x 54.3
Q1 = 22697.4 J
Step 2:
Determination of the heat needed to vaporise 100g of water.
This is illustrated below:
Mass (M) = 100g
Heat of vaporisation (ΔHv) = 2260 J/g
Heat (Q2) =?
Q2 = MΔHv
Q2 = 100 x 2260
Q2 = 226000 J
Step 3:
Determination of the heat needed to raise the temperature of steam from 100°C to 103.5°C.
This is illustrated below:
Mass (M) = 100g
Initial temperature (T1) = 100°C
Final temperature (T2) = 103.5°C
Specific heat capacity (C) of steam = 1.90 J/g
Change in temperature (ΔT) = T2 – T1 = 103.5°C – 100°C = 3.5°C
Heat (Q3) =?
Q3 = MCΔT
Q3 = 100 x 1.9 x 3.5
Q3 = 665 J
Step 4:
Determination of the overall heat needed.
This is simply obtained by adding all the heat calculated above. This is illustrated:
QT = Q1 + Q2 + Q3
Q1 = 22697.4 J
Q2 = 226000 J
Q3 = 665 J
Total heat (QT) =..?
QT = Q1 + Q2 + Q3
QT = 22697.4 + 226000 + 665
QT = 249362.4 J
Therefore, the heat needed to increase the temperature of 100g of water from 45.7°C to 103.5°C is 249362.4 J
WILL MARK BRAINLIEST FOR CORRECT ANSWER!!!!!!!!!!
The emission of what type of particle from a nucleus will not cause a transmutation?
A) positron
B) proton
C) neutron
D) alpha particle
Answer:
the answer is c
Explanation:
Choose the correct energy transformation for the burning of a piece of wood. A. heat energy to light energy B. light energy to heat energy C. chemical potential energy to heat energy D. heat energy to chemical potential energy
Answer:
C
Explanation:
In the case of burning wood, stored potential energy in the wood is released due to heating by other excited atoms.
Final answer:
The burning of wood transforms chemical potential energy stored in the wood into heat energy, making option C the correct answer.
Explanation:
The correct energy transformation for the burning of a piece of wood is chemical potential energy to heat energy. This process is an example of a chemical reaction where the chemical energy stored in wood's molecules is released as heat and light energy when the wood combusts.
The chemical potential energy stored in the bonds of the wood is released as heat and light during the combustion process. This chemical potential energy is converted into heat energy, which is evident through the warmth generated by the burning wood. Additionally, some of this energy may also be transformed into light, but the primary conversion is from chemical potential energy to heat.
List 3 things that happen at the endpoint or equivalence point.
The equivalence point is the point in a titration where the amount of titrant added is enough to completely neutralize the analyte solution. The moles of titrant (standard solution) equal the moles of the solution with unknown concentration. ... The equivalence point is not the same as the endpoint of a titration.
Sand dunes protect beaches against erosion and flooding due to storms.
Which human activity would have the most negative impact on dune grasses and the coast?
driving vehicles along the beach
building houses near the beach
walking on the dunes of the beach
allowing kids to play on the beach
Answer:
B. Building houses near the beach
Explanation:
it was right on edge
Sand dunes protect beaches against erosion and flooding due to storms. Building houses near the beach human activity would have the most negative impact on dune grasses and the coast. Therefore, option B is correct.
What is erosion ?The process of removing soil, rock, or dissolved material from one area on the Earth's crust and moving it to another, where it is deposited, is known as erosion. Erosion differs from weathering, which is a static process.
When dirt is exposed to high winds, heavy rains, and moving water, soil erosion primarily takes place. Some human activities, particularly farming and clearing land, make soil more prone to erosion.
Beyond the loss of agricultural land, soil erosion has other negative repercussions. In streams and rivers, it has increased pollution and sedimentation, blocking these waterways and resulting in a loss in fish and other species. Additionally, deteriorated soils are frequently less able to retain water, which can make floods worse.
Thus, option B is correct.
To learn more about the erosion, follow the link;
https://brainly.com/question/1599677
#SPJ5
Why do we not see a lunar
and solar eclipse every
month
A. The moon orbits around Earth at a different angle than the Earth orbits around the Sun
B. The moon takes longer than 1 month to
orbit
C. Mars interferes with the alignment of the
moon, Earth and Sun
D. All of the above
Answer:
The moon's path around Earth is tilted compared to Earth's orbit around the sun. The moon can be behind Earth but still get hit by light from the sun. In this diagram, you can see that the moon's orbit around Earth is at a tilt. This is why we don't get a lunar eclipse every month.
So, I think it is A.
Explanation:
I hope that helps. I don't know if it is right or wrong, but good luck :)
Describe how molarity can be used in stoichiometry calculations
Answer:
The stoichiometric coefficients in your balanced chemical equation can represent molecules or moles or molarity.
When you balance an equation, you can use the coefficients to determine the quantity of either products or reactants. If the reaction occurs in water, then you can either do the conversion from reactants to products using moles or molarity.
Explanation:
For example, if you have a 1.5M solution of H2SO4, then the concentration of SO4-2 in solution can be determined by the balanced dissociation equation H2SO4 = 2H+ + SO4-2.
1.5M H2SO4(1M SO4-2/1M H2SO4) = 1.5 M SO4-2
Final answer:
Molarity is a key conversion factor in stoichiometry that relates the amount of a solute in moles to the volume of solution, facilitating calculations involving solution concentrations and chemical reactions.
Explanation:
Molarity can be used in stoichiometry calculations to determine quantities in chemical reactions. When dealing with stoichiometry problems involving solutions, molarity serves as a direct conversion factor because it is based on the mole unit. For instance, consider the reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH):
HCl(aq) + NaOH(s) → H₂O(l) + NaCl(aq)
Convert the mass of NaOH to moles using its molar mass.Use the balanced chemical equation to find the molar ratio between NaOH and HCl.Convert the moles of NaOH to moles of HCl using this ratio.Finally, use the molarity of the HCl solution (moles per liter) to find the volume of HCl needed to react with the given amount of NaOH.To find out how many liters of aqueous HCl will react with a given mass of NaOH, we perform the following steps:
Note that the molarity acts as a bridge between the amount of solute (HCl) and the volume of the solution.
Calculate the mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL.
Answer: 37.5g
Explanation:
To find mass you need to multiply density times volume
M=D*V
m=2.5*15
m=37.5g(only grams)
Here is something to help
Density=Mass/Volume
Volume=Mass/Density
Mass=Density*Volume
The mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL is 37.5 g.
What is Density?Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.
In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.
According to the question,
The mass of a liquid = ?
The volume of a liquid = 15mL.
The density of the liquid = 2.5 g/mL.
According to the formula,
Density = Mass/VolumeMass = Density × Volume = 2.5 × 15 = 37.5 g.Therefore, the mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL is 37.5 g.
To learn more about Density, refer to the link:
https://brainly.com/question/1354972
#SPJ2
does anyone know this?
Muscles perform what types of energy transformation?
a.) Kinetic to Potential
b.) Kinetic to Electrical
c.) Thermal to Radiant
d.) Chemical to Kinetic
Answer:
d
Explanation:
Inside of your muscles, there are fibers that are always ready to use your body's energy currency - ATP - and convert that into motion. Since they use ATP, which is a form of chemical energy, and turn it into motion, or kinetic energy, the correct answer is d. Hope this helps!
Final answer:
Option d) Muscles transform chemical energy into kinetic energy during contraction, using oxygen and food molecules to perform work and produce motion.
Explanation:
During muscle contraction, the potential energy stored in the form of chemical bonds in food molecules and oxygen is transformed into the kinetic energy of motion as the muscles do work. This can be observed through the consumption of oxygen and nutrients, the production of waste products like carbon dioxide, and the release of heat.
Moreover, the transformation of energy in muscles also results in an increased blood supply to bring nutrients and oxygen to the muscle cells efficiently and to carry away waste products.
The correct answer to the question 'Muscles perform what types of energy transformation?' is (d) Chemical to Kinetic.
Is the following equation balanced? SO3 + 2H2O H2SO4 no yes
Answer: No
Explanation: It's not balanced because four oxygen atoms in H2SO4, whereas there are 5 oxygen atoms in the reactants side. Also, there's more hydrogen atoms on the reactants side.
I hope this helps!
Answer:no
Explanation:
It's not balanced because four oxygen atoms in H2SO4
How can carbon dioxide be considered a pollutant when it is a natural component of air?
a Carbon dioxide is considered a pollutant even though it is a natural component of air, because it is
harmful to all living organisms
b Carbon dioxide is considered a pollutant when larger concentrations than normal are present in the
air as a result of human activity
Carbon dioxide is considered a pollutant, because it forms harmful chemicals when mixed with
other pollutants in the air
d. Carbon dioxide cannot be considered a pollutant under any circumstances
Please select the best answer from the choices provided
OA
ОВ
OC
OD
ASAP PLEASE
The weight of the atmosphere is called what?
A. Wind
B. Gravity
C. Air pressure
D. Temperature
Answer:
The correct answer is C. Air pressure. :)
Explanation:
Air preasure is the amount of gravitational force acting against an object.
Which compound will conduct electricity when it is dissoved in water
CHA
Cusos
Citos
Answer:
Electrolyte Solutions
An electrolyte is any salt or ionizable molecule that, when dissolved in solution, will give that solution the ability to conduct electricity. This is because when a salt dissolves, its dissociated ions can move freely in solution, allowing a charge to flow.
Explanation:
Answer:
C. CuSO4
Explanation:
Trust
Curious Carl and his lab partner added small pieces of various metals to HCl. Magnesium (Mg) and zinc (Zn) reacted vigorously with HCl, releasing hydrogen gas. This equation represents the reaction of zinc in hydrochloric acid.
Zn + 2HCl → ZnCl2 + H2
What is the half reaction for the reduction of hydrogen in the reaction?
A) 2HCl → + 2e- + H2(g)
B) H + Cl → + 2e- + H2(g)
C) 2H+ + 2e- → H2(g)
D) 2H+ - 2e- → H2(g)
Answer:
I just took it on use test prep. the answer is C. 2H + 2e → H2(g)
Answer:B
Explanation:USA test prep