Answer: the first one is work and the second one is energy
Explanation:
Answer:
first :work second:energy
Explanation:
A sample of 4.0 mol of neon gas at a pressure of 2.5 atm is injected into a container at
25°C. What is the volume of the container?
Answer:
The volume of container is 39.14 L.
Explanation:
Given data:
Number of moles of neon = 4.0 mol
Pressure of gas = 2.5 atm
Temperature of gas = 25°C
Volume of container = ?
Solution:
we will use general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
25+273 = 298 K
Now we will put the values in formula.
2.5 atm × V = 4.0 mol × 0.0821 atm.L/ mol.K × 298 K
V = 97.86 atm.L /2.5 atm
V = 39.14 L
The volume of container is 39.14 L.
If the shape of the moon appears to be increasing over time, what is
this called? *
A.waning
B.waxing
C.crescent
D.gibbous
Answer:
B
Explanation:
Determine the complete, balanced chemical reaction for the following reaction. Selenic acid (H2SeO4) is a powerful oxidizing acid and it dissolve silver and gold: Au + H2SO4 --> Au2(SeO4)3 + H2SO3 + H2O Then, proceed to answer the following questions: Reactants: Enter the coefficient number in front of Au in the reaction: | Enter the coefficient number in front of H2Se04 in the reaction: Products: Enter the coefficient number in front of Auz(SeO4)3 in the reaction: Enter the coefficient number in front of H2SeO3 in the reaction: Enter the coefficient number in front of H20 in the reaction: What type of chemical reaction is this? Enter one of the following: "synthesis", "decomposition", "single displacement", or "double displacement".
The complete, balanced chemical reaction for the reaction between gold (Au) and selenic acid (H2SeO4) is: 4Au + 3H2SeO4 → 2Au2(SeO4)3 + H2SO3 + H2O. The coefficients for the reactants and products are as follows: 4 for Au, 3 for H2SeO4, 2 for Au2(SeO4)3, 1 for H2SO3, and 1 for H2O. The type of chemical reaction is a single displacement reaction.
The balanced chemical equation for the reaction between gold (Au) and selenic acid (H2SeO4) is:
4Au + 3H2SeO4 → 2Au2(SeO4)3 + H2SO3 + H2O
In this equation, the coefficient in front of Au is 4, indicating that 4 moles of gold are involved in the reaction. The coefficient in front of H2SeO4 is 3, indicating that 3 moles of selenic acid are present.
On the product side, the coefficient in front of Au2(SeO4)3 is 2, indicating the formation of 2 moles of gold selenate. The coefficient in front of H2SO3 is 1, representing the formation of 1 mole of sulfurous acid. The coefficient in front of H2O is also 1, indicating the production of 1 mole of water.
Based on the reactants and products involved, the type of chemical reaction is a single displacement reaction, as gold displaces hydrogen in selenic acid to form gold selenate.
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determine the enthalpy change when 18.6 g of carbon is reacted with oxygen according to the reaction: c(s) o2 (g) --> co2 (g) the change in enthalpy for this reaction is -349 kj/mol.
The enthalpy change when 18.6 g of carbon is reacted with oxygen according to the reaction: c(s) + O2 (g) --> CO2 (g) is -349 kJ/mol. This enthalpy change is referred to as the heat of reaction, or enthalpy of reaction, and can be calculated using the enthalpy of formation of each reactant and product in the reaction.
The enthalpy of formation for carbon is given as +716 kJ/mol and for oxygen it is given as 0 kJ/mol. The enthalpy of formation for CO2 is given as -393.5 kJ/mol. Using Hess’s law, we can calculate the enthalpy of reaction using the following equation: ΔHreaction = (ΔHformation CO2) - (ΔHformation C + ΔHformation O2)
Using the values for the enthalpies of formation for the reactants and products, the enthalpy of reaction can be calculated as follows: ΔHreaction = (-393.5) - (716 + 0) = -349 kJ/mol.This is the same enthalpy change as given in the question.
In conclusion, the enthalpy change when 18.6 g of carbon is reacted with oxygen according to the reaction: c(s) + O2 (g) --> CO2 (g) is -349 kJ/mol.
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How many moles of Ba(OH)2 would be made from 9.62 x 10^24
15.9 moles of Ba(OH)\(_2\) would be made from 9.62 x 10²⁴. The mole signifies 6.022×10²³ units, which is a very big quantity.
What is moles?In chemistry, a mole, sometimes spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, or even other predetermined particles.
The mole signifies 6.022×10²³ units, which is a very big quantity. Under the International Unit System (SI), the mole is defined as this quantity as of May 20, 2019, according the General Conference upon Weights as well as Measurements. The amount of atoms discovered via experimentation to be present in 12 kilograms of carbon-12 was originally used to define the mole.
mole = given number of particles / 6.022×10²³
= 9.62 x 10²⁴/ 6.022×10²³
= 1.59×10
= 15.9 moles
Therefore, 15.9 moles of Ba(OH)\(_2\) would be made from 9.62 x 10²⁴.
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What is the molecular formula of gypsum salt ?
Gypsum is composed of calcium sulphate (CaSO4) and water (H2O). Its chemical name is calcium sulphate dihydrate (CaSO4. 2H2O).
Purchase process: (50) The process begins with a department admin sending a purchase request to the IT department. The IT Manager reviews the request and if approved, requests a quote from Apple, Dell, HP, ASUS and Lenovo. If rejected, the request is sent back to the admin for review and has to be resubmitted to the IT Manager. The best price will be sent to the admin and once approved, the IT manager finalizes the vendor and then prepares the purchase request. The Procurement Supervisor receives the request and issues the purchase order to the vendor. The Procurement Supervisor then reviews the invoice and processing time from the vendor. By the end of the processing time, if the tracking number was not received, the Supervisor cancels the order. If vendor provides the tracking number, Procurement Supervisor collects the product once delivered and simultaneously submits the payment. Once both the steps are done, the process ends as the purchase is completed.
The purchase process involves steps such as initiating a request, vendor selection, approval, purchase order issuance, product delivery, and payment, ensuring a systematic approach to procurement for accountability and efficiency.
The purchase process consists of several steps:
1. The department admin initiates the process by sending a purchase request to the IT department.
2. The IT Manager reviews the request and decides whether to approve or reject it.
3. If the request is approved, the IT Manager contacts various vendors, such as Apple, Dell, HP, ASUS, and Lenovo, to request quotes.
4. The IT Manager receives the quotes and selects the best price.
5. Once the best price is selected, the IT Manager informs the admin and waits for their approval.
6. If the admin approves, the IT Manager finalizes the vendor selection and prepares the purchase request.
7. The IT Manager then sends the purchase request to the Procurement Supervisor.
8. The Procurement Supervisor receives the request and issues a purchase order to the chosen vendor.
9. The Procurement Supervisor reviews the vendor's invoice and processing time.
10. If the processing time elapses and the tracking number has not been received, the Procurement Supervisor cancels the order.
11. If the vendor provides the tracking number within the processing time, the Procurement Supervisor collects the product once it is delivered.
12. At the same time, the Procurement Supervisor submits the payment to the vendor.
13. Once both steps are completed, the purchase process is considered finished, and the purchase is completed.
This process ensures that there is a clear and systematic approach to purchasing items, from the initial request to the final delivery and payment. Each step is important in maintaining accountability and efficiency in the procurement process.
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Give an example of a diatomic molecule found in Earth's atmosphere.
Answer:
oxygen is an example of a diatomic molecule found in earth's atmosphere!
Explanation:
what are two other names for the light independent reactions?
Answer: The Calvin cycle and the Calvin-benson cycle
Explanation:
What Are The Differents Between Multievlent Elements and Polyatomic Ions with examples?
Answer:
The key difference between polyvalent element and polyatomic ion is that polyvalent elements have more than one valency whereas polyatomic ions have more than one atom that are covalently bonded to each other.
what is the ground-state electron configuration of the ion cu2+?
Ground state Electronic Configuration is = 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰.
To determine the ground-state electron configuration of the Cu2+ ion (copper ion with a +2 charge), we need to consider the electron configuration of the neutral copper atom (Cu) and remove two electrons.
The electron configuration of a neutral copper atom (Cu) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰.
To remove two electrons and form the Cu2+ ion, we start by removing them from the highest energy level, which is the 4s orbital.
The electron configuration of the Cu2+ ion can be written as: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰.
Therefore, the ground-state electron configuration of the Cu2+ ion is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰.
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Plastic is used to cover the copper wire in the power codes of appliances because plastic differs from copper in _________
Answer:
in copper from different plastics because appliances of codes to power day in wire copper the cover to use to plastic
the vapor pressure of sicl4 is 100 mmhg at 5.4 ∘c, and the normal boiling point is 57.7 ∘c. what is δhvap for sicl4 in kj/mol
Answer: ΔHvap = 31.26 kJ/mol
The vapor pressure of a substance is the pressure at which the substance is in equilibrium with its vapor phase. The heat of vaporization (ΔHvap) is the amount of energy required to vaporize one mole of a substance at its normal boiling point. To find ΔHvap for SiCl4, we can use the Clausius-Clapeyron equation:
ln(P2/P1) = (ΔHvap/R)(1/T1 - 1/T2)
Where P1 and P2 are the vapor pressures at temperatures T1 and T2, R is the ideal gas constant (8.314 J/mol·K), and ΔHvap is the heat of vaporization. Plugging in the given values:
ln(760 mmHg/100 mmHg) = (ΔHvap/8.314 J/mol·K)(1/278.55 K - 1/330.85 K)
Solving for ΔHvap gives:
ΔHvap = 8.314 J/mol·K × (1/278.55 K - 1/330.85 K) × ln(760 mmHg/100 mmHg)
ΔHvap = 31,260 J/mol
Converting from J/mol to kJ/mol gives:
ΔHvap = 31.26 kJ/mol
Therefore, the heat of vaporization for SiCl4 is 31.26 kJ/mol.
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(c) 10g of HBr reacted with 5g of Al. Calculate the: (i) mass of Aluminium bromide produced. (ii) number of bromide ions formed. (iii) percentage yield if 0.55 g of aluminum bromide is actually yielded. [Al-27, Br-80, H=1, L-6.022×10²3]
6HBr+2Al → 2AlBr3+3H2
now, as the reaction is showing
6 moles of HBr reactes with 2 moles of Aluminium gives us 2 moles of Aluminium bromide and 3 moles of hydrogen gas
as the question says 10g of HBr reacted with 5g of Al.
(i) mass of Aluminium bromide produced.
moles = given mass/molecular mass
moles = 5g/54g
moles 0.0925 mole
(ii) number of bromide ions formed
6 moles of bromide ions formed in this reaction
now 1 moles = 6.022×10^23
6 moles = 6 ×6.022×10^23
= 36.132×10^23ions
(iii) percentage yield if 0.55 g of aluminum bromide is actually yielded
percentage yield= moles×100
percentage yield= 0.55×100÷107
percentage yield=0.514%
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Which type of bond is not backed by any specific collateral, such as land or equipment?
a) secured bonds
b) debenture bonds
c) equity bond
d) mortgage bonds
Answer:
A
Explanation:
looking at both equity
and mortgage bond fixtures
I would rather say secured bond fit into not being backed by any specific collateral
is classified as a substance
A. Elements and compound
B.mixtures
you used 1.494 g of your unknown weak acid and it took 36.04 ml of your standardized 0.111 m naoh to reach the 2nd equivalence point, using the procedure described in the lab manual. what is the molecular weight of the acid?
The molecular weight of the unknown weak acid is approximately 373.67 g/mol. To determine the molecular weight of the unknown weak acid, we'll first calculate the moles of NaOH used and then the moles of the acid, and finally use the given mass of the acid to find the molecular weight.
Follow these steps:
1. Convert the volume of NaOH to liters: 36.04 mL * (1 L / 1000 mL) = 0.03604 L
2. Calculate the moles of NaOH: moles = Molarity * Volume = 0.111 M * 0.03604 L = 0.00399844 mol
3. Since the NaOH and the weak acid react in a 1:1 ratio at the 2nd equivalence point, the moles of the weak acid will be equal to the moles of NaOH: moles of weak acid = 0.00399844 mol
4. Now, use the given mass of the weak acid (1.494 g) and the moles of the weak acid to calculate the molecular weight: Molecular weight = Mass / Moles = 1.494 g / 0.00399844 mol = 373.67 g/mol
Thus, the molecular weight of the unknown weak acid is approximately 373.67 g/mol.
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What final product is obtained when 2,8-nonanone is treated with base, followed by reaction with sodium borohydride?
Sodium borohydride decomposed by water to form sodium hydroxide, a corrosive material, and hydrogen, a flammable gas. The appearance of sodium borohydride is white to grayish crystalline powder.
The heat of this reaction may adequate to ignite the hydrogen. The material itself is easily ignited and burns powerfully once ignited.
Great reducing agent.
According to question,
When 2,8 nonaone is treated with base it gives 4 methy, 4 hydroxy oct-2-one and when it followed by the NaBH4 (Sodium Boro hydride) it gives methyl, 1,7 di hydroxy octane.
Hence the final product obtained is methyl, 1,7 di hydroxy octane.
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Look at the image of the pedestrian trying to make her way across a street during a blizzard. How do you think extreme weather events like this blizzard will be different in the future? Why?
The most well-known blizzards are winter storms that create several inches of snow and occur with strong winds that cause blowing snow and whiteout conditions, however not all blizzards take place in this fashion.
What is a Ground Blizzard?In the Midwest, ground blizzards form with little to no concurrent (or new) snowfall. The Children's Blizzard of 1888, which caused an estimated 235 fatalities in the Great Plains, was one of the most infamous ground blizzards.Because it was preceded by uncommonly mild air, which made people let their guard down, this ground blizzard was exceedingly hazardous. Despite the fact that many individuals went outside without suitable winter clothing, the mild weather did not continue for very long. Since then, there have been innumerable further ground blizzards, many of which have been fatal.The usual ground blizzard happens when an Arctic cold front passes through the area, causing temperatures to drop and winds to pick up quite quickly, frequently reaching gusts of 50 to 60 mph. This strong wind will quickly pick up any snow that is on the ground and cause whiteout conditions if there are several inches of deep, recent snow. Cold temperatures that follow the Arctic front are another factor making these blizzards dangerous. A risk of frostbite or hypothermia exists for anyone stranded in their car or forced to walk outside.To Learn more About blizzards refer to :
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A gallon of water has a mass of 37.85 hectograms. What is the mass in grams?
A gallon of water has a mass of 37.85 hectograms, which is equal to 3785 grams.
Organisms that live in the water (ocean, rivers, intertidal zones) must be adapted for changing conditions. Describe at least one (1) adaptation that organisms living in an aquatic ecosystem might have and how it helps the organism to survive.
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
What are organism?Organisms are living species that live on the planet earth.
There are types of organisms categorized by the environment they live.
Organism that can survive only in water is called an aquatic organism.
We have,
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
Aquatic environments can have varying levels of salinity, and some organisms need to maintain a specific salt concentration in their bodies to survive.
For example, marine fish have kidneys that can produce very concentrated urine to prevent them from losing too much salt in their surroundings, while freshwater fish have specialized cells in their gills that actively pump salt out of their bodies to maintain the appropriate balance.
Similarly,
Some marine invertebrates, such as crabs and mussels, can regulate the amount of salt they take in by actively transporting ions across their gills or other specialized structures.
This adaptation helps the organism to maintain the proper fluid balance and avoid dehydration or over-hydration, which can be lethal.
Thus,
One adaptation that organisms living in an aquatic ecosystem might have is the ability to regulate their salt concentration.
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which of the following is the formula for the simplest ketone? select the correct answer below: ch3coh ch3ch2cho ch3coch3 hcho
The formula for the simplest ketone among the given options is CH3COCH3.
This formula represents the compound acetone, which is the simplest and most common ketone. Acetone consists of a carbonyl group (C=O) bonded to two methyl groups (CH3).
It is a colorless, volatile liquid with a distinctive fruity odor. Acetone is widely used as a solvent, particularly in chemical and laboratory settings. It is also commonly found in household products such as nail polish remover.
The other options, CH3COH, CH3CH2CHO, and HCHO, do not represent ketones.
CH3COH is the formula for methanol, CH3CH2CHO represents an aldehyde (ethanal or acetaldehyde), and HCHO represents formaldehyde, which is also an aldehyde.
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how many molecules are 4.3 x 10^27 molecules of N2O5
Answer:
7142.86 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
\(n = \frac{N}{L} \\\)
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
\(n = \frac{4.3 \times {10}^{27} }{6.02 \times {10}^{23} } \\ = 7142.857...\)
We have the final answer as
7142.86 molesHope this helps you
In multicellular organismscells that become specialized to perform a specific function are called?
A. Organelle
B. Tissue
C. Organ
D. Epithelial
2. Describe the shape of the graph during the period when water is freezing. Why is the graph shaped
this way?
During the period when water is freezing, the graph typically shows a relatively flat or horizontal line with a slight downward slope. This phase of the graph represents the transition from liquid water to solid ice at the freezing point.
The shape of the graph during this period is a result of the unique properties of water and the energy changes that occur during the freezing process. When water is cooled below its freezing point, the kinetic energy of the water molecules decreases, causing them to slow down and come closer together. As a result, the intermolecular forces between the water molecules, known as hydrogen bonds, become stronger.
During the freezing process, the energy being removed from the water is used to break the hydrogen bonds between the water molecules. This energy transfer causes the temperature of the water to remain constant as the phase change occurs. The heat energy is being absorbed by the water to break the intermolecular bonds rather than raising the temperature of the substance.
As a result, the temperature remains steady during the freezing process until all the water has transformed into ice. Once the phase change is complete, the temperature begins to decrease again, indicating that the solid ice is cooling further.
The shape of the graph during the freezing period reflects the energy transfer and phase change occurring within the water. The horizontal line represents the constant temperature as the energy is used for the transformation from liquid to solid, and the slight downward slope indicates the continued cooling of the solid ice after the freezing process is complete.
Overall, the graph shape during the freezing period is a reflection of the energy exchange and phase transition happening within the water system as it changes from a liquid to a solid state.
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What is the importance of Commission of election in the Philippines?.
In the democratically run Philippines, everyone has the right to vote. This organization is intended to be constitutionally independent of the executive, legislative, and judicial branches of government in order to ensure the holding of free, fair, and honest elections.
Each voter is allowed one vote during the election period. A voter may split their ballot. There is no second round of voting, and the president and vice president may be from different political parties. The candidate with the most votes wins the job. The President serves as the nation's head of state and government as commander-in-chief of the Philippine Armed Forces. As the chief executive, the President is in charge of all executive offices, bureaus, and departments. one of the three branches of government
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Combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. Calculate the empirical formula for fluorene.
Combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. The empirical formula of fluorene C₆H₄.
CₓHₐ + O2 → CO2 + H2O Since the combustion is complete, so the total mass of the reactants is equal to the total mass of the reactants Therefore, Mass of O2 = (17.9 + 9.14) – 5.9 = 21.14 grams Here, the empirical formula for the hydrocarbon is CₓHₐ. So, now we have to need to determine the number of moles of the O2, CO2, and H2O :- Mole of CO2 = 17.9/44 = 0.4068 Mole of H2O = 9.14/18 = 0.5078 Mole of O2 = 21.14/32 = 0.6606. The empirical formula for the compound containing uranium and fluorine is UF6. Explanation: The empirical formula of a compound represents the lowest whole number ratio of elements in the compound. This ratio is represented by subscripts in the formula. by this information, we can consider that combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. The empirical formula of fluorene C₆H₄.
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calculate the heat of reaction delta h for the following reaction: ccl4(g) h2o(g) -> chcl3(g) hcl(g)
The heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol. To calculate the heat of reaction (ΔH) for the given reaction:
CCl₄(g) + H₂O(g) -> CHCl₃(g) + HCl(g)
You would need the standard enthalpies of formation for each compound involved in the reaction. The standard enthalpy of formation (ΔHf) is the enthalpy change when one mole of a compound is formed from its elements in their standard states.
Here are the standard enthalpies of formation for the compounds involved:
ΔHf[CCl₄(g)] = -135.5 kJ/mol
ΔHf[H₂O(g)] = -241.8 kJ/mol
ΔHf[CHCl₃(g)] = -104.7 kJ/mol
ΔHf[HCl(g)] = -92.3 kJ/mol
To calculate ΔH for the reaction, you need to sum up the enthalpies of formation of the products and subtract the sum of the enthalpies of formation of the reactants:
ΔH = ΣΔHf(products) - ΣΔHf(reactants)
ΔH = [ΔHf[CHCl₃(g)] + ΔHf[HCl(g)]] - [ΔHf[CCl₄(g)] + ΔHf[H₂O(g)]]
ΔH = [(-104.7 kJ/mol) + (-92.3 kJ/mol)] - [(-135.5 kJ/mol) + (-241.8 kJ/mol)]
ΔH = -196.9 kJ/mol - (-377.3 kJ/mol)
ΔH = 180.4 kJ/mol
Therefore, the heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol.
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Hw does water vapor response, if temperature rises 1K?
When the temperature rises by 1 Kelvin (1K), the response of water vapor is typically an increase in its concentration in the atmosphere. This is because warmer air can hold more water vapor due to its increased capacity to hold moisture.
As the temperature increases, the kinetic energy of water molecules also increases, leading to greater evaporation from liquid water sources such as oceans, lakes, and rivers. This increased evaporation results in an increased amount of water vapor in the air. Water vapor is a greenhouse gas, meaning it has the ability to absorb and emit infrared radiation. As the concentration of water vapor increases in response to rising temperature, it enhances the greenhouse effect, trapping more heat in the atmosphere. This positive feedback loop can further amplify the temperature increase, leading to more evaporation and an even higher concentration of water vapor.
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What are the two types of carbohydrates and food sources?.
Answer: simple and complex.
Explanation:These are also called simple sugars. They're found in refined sugars, like the white sugar you see in a sugar bowl. If you have a lollipop, you're eating simple carbs.