The solar energy is a massive source of energy which can generate electricity and reduce the global warming emissions. But the set up of solar panels have both positives and negatives.
What are the negative impacts of solar panels?The manufacturing process of solar panels requires hazardous chemicals and materials for cleaning the semiconductors. The chemicals include hydrofluoric acid, sulfuric acid, etc.
In addition to the release of these chemicals, the solar panel manufactures inhale silicon dust which threatens the public health. The solar energy systems require a large area of land which can lead to the loss of wildlife habitats.
The construction of solar panels also affect soil compaction and erosion.
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PLEASE HELP
1) When 33 g of a metal at 89 ◦C is added to
43 g of water at 21 ◦C, the temperature of the
water rises to 30 ◦C. What is the specific heat
capacity of the metal? Assume no heat was
lost to the surroundings.
Answer in units of J
g ·
◦C
2) A 15 kg piece of zinc at 66◦C is placed in a
container of water. The water had a mass of
39 kg and a temperature of 17◦C before the
zinc was added.
What is the final temperature of water and
zinc? The specific heat of zinc is 388 J/kg ·
◦ C
and of water 4180 J/kg ·
◦ C.
Answer in units of ◦C.
3) Calculate the amount of heat required to convert 94 g of ice at −31◦C to steam at 143.6
◦C.
Answer in units of kJ
The amount of heat required to convert 94 g of ice at -31◦C to steam at 143.6◦C is 2.32 kJ.
What is amount?Amount is a monetary measurement of value. It is a numerical value assigned to goods, services, and other transactions that indicate their worth in a currency. Amounts are used to quantify the size of a purchase or sale, and to determine the cost or value of an item. Amounts are also used to track debts, credits, investments, and other financial transactions.
This can be calculated using the formula for heat, Q = mCΔT, where m is the mass of the object, C is the specific heat capacity, and ΔT is the change in temperature. In this case, m is 94 g, C is 4.184 J/g · ◦C for water, and ΔT = 174.6◦C. Therefore, Q = 94 × 4.184 × 174.6 = 2.32 kJ.
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What adaptatión do Judy and her parents have that help them run from predators coming?
Judy and her parents have an adaptation that helps them run from predators coming; this adaptation is called flight. Flight is an innate ability to fly away from danger by using wings or other means.
What is adaptation ?Adaptation is the process of change in an organism that helps it better survive in its environment. This can include changes in behavior, physiology, and even genetics that allow an organism to better survive and reproduce. For example, a bird may migrate to a warmer place in the winter to escape the cold temperatures, or a plant may produce thorns to protect itself from being eaten by predators. Adaptation is an important factor in the survival of a species, as it allows populations to adjust to new environmental conditions. As environmental conditions change over time, adaptation can help species adjust to survive in the new conditions.
Flight is a common adaptation used by many animals, including Judy and her parents. Flight allows them to quickly fly away from predators in order to avoid being hurt or killed. They can fly away from danger in a matter of seconds, giving them a better chance of survival. Flight is an important adaptation that helps Judy and her parents stay safe and out of harm's way.
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Relative formula mass- Calculate the relative formula mass of the foll
examples:
1) H₂O
Answer:
The relative formula mass of H₂O can be calculated by adding the atomic masses of two hydrogen atoms and one oxygen atom in the molecule. The atomic mass of hydrogen is 1 and the atomic mass of oxygen is 16. So, the relative formula mass of H₂O is:
(2 x 1) + 16 = 18
Explanation:
What Mass of h20 reacted?
The mass of water reacted is 17.67g.
What is STP?STP stands for standard temperature and pressure. STP refers to a specific pressure and temperature used to report on the properties of matter.
According to IUPAC( International Union of Pure and Applied Chemistry), it is defined as -
Temperature of 0 degree celsius (273K)Pressure of 1 atmIt is generally needed to test and compare physical and chemical processes where temperature and pressure plays an important role as they keep on varying from one place to another.
One mole of a gas under STP conditions occupies a volume of 22.4L.
Given,
Volume of oxygen = 11L
Since 1 mole of a gas occupies 22.4 L of volume at STP.
Moles of oxygen produced = 11 ÷ 22.4
= 0.49 moles
From the reaction,
1 mole of oxygen is produced by 2 moles of water.
Thus, 0.49 moles of oxygen is produced by 0.49 × 2 moles of water
So, moles of water = 0.98 moles
mass = moles × molar mass
= 0.98 × 18
= 17.67g
Therefore, mass of water reacted is 17.67g.
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balancing equation: Solid iron is added into aqueous copper(II) chloride to produce aqueous iron(III) chloride and solid copper.
The balanced chemical equation for the reaction is: Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)
What is the balanced chemical equation?The equation shows that one mole of solid iron reacts with two moles of aqueous copper(II) chloride to produce two moles of aqueous iron(III) chloride and one mole of solid copper.
To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Here's how we balance the equation:
Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)
On the left-hand side, we have one iron atom (Fe) and two copper atoms (Cu). On the right-hand side, we have two iron atoms (Fe) and one copper atom (Cu). To balance the iron atoms, we add a coefficient of 2 in front of Fe(s) on the left-hand side:
2Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)
Now we have two iron atoms on both sides. However, we also have four chloride ions (Cl-) on the left-hand side and six chloride ions on the right-hand side. To balance the chloride ions, we add a coefficient of 3 in front of CuCl2(aq) on the left-hand side:
2Fe(s) + 3CuCl2(aq) → 2FeCl3(aq) + Cu(s)
Now we have two iron atoms, six chloride ions, two copper ions (Cu2+), and one copper atom on both sides. The equation is balanced!
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Which of these is an example of an agricultural use for radiation?
A. making heavy isotopes to find new elements.
B. irradiating wheat to kill fungus.
C. diagnostic procedures that image inside the body, such as a PET scan.
D. locating leaks in a water line in a building.
An example of an agricultural use for radiation is option B which is irradiating wheat to kill fungus is an example of an agricultural use for radiation.
Radiation in agriculture explained.Radiation in agriculture refers to the use of various forms of ionizing radiation (such as gamma rays, X-rays, and electron beams) for agricultural purposes. This includes using radiation to improve crop yield and quality, preserve food, and control pests and diseases. Radiation can also be used to induce mutations in plants, which can lead to the development of new varieties with desirable traits such as increased yield, disease resistance, and drought tolerance. Additionally, radiation can be used to sterilize soil and agricultural products, such as spices and herbs, to eliminate harmful pathogens and pests. Overall, the use of radiation in agriculture has the potential to improve food safety, increase productivity, and reduce waste in the agricultural industry.
Therefore, radiation can be used to kill harmful organisms such as fungi and bacteria that can cause disease and spoilage in crops, as well as to improve breeding and seed production in plants.
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A reaction has a rate constant of 0.012s ^ - 1 at 400.0 K and 0.691s ^ - 1 at 450.0 K.
Determine the activation barrier for the reaction.
Answer:
The rate constant of a reaction is related to the activation energy (Ea) and the temperature (T) by the Arrhenius equation:
k = A * e^(-Ea/RT)
where k is the rate constant, A is the pre-exponential factor, R is the gas constant, and T is the absolute temperature.
Taking the natural logarithm of both sides of the equation, we get:
ln(k) = ln(A) - (Ea/RT)
We can use this equation to determine the activation energy for the reaction by comparing the rate constants at two different temperatures. For example, at 400.0 K and 450.0 K, we have:
ln(k1) = ln(A) - (Ea/RT1)
ln(k2) = ln(A) - (Ea/RT2)
where k1 is the rate constant at 400.0 K, k2 is the rate constant at 450.0 K, and RT1 and RT2 are the product of the gas constant and temperature at each temperature.
Taking the difference between the two equations, we get:
ln(k2/k1) = Ea/R * (1/RT1 - 1/RT2)
Solving for the activation energy (Ea), we get:
Ea = -R * ln(k2/k1) / (1/RT1 - 1/RT2)
Substituting the given values, we get:
Ea = -8.314 J/mol*K * ln(0.691/0.012) / (1/400.0 K - 1/450.0 K)
Ea = 93.8 kJ/mol
Therefore, the activation energy for the reaction is 93.8 kJ/mol.
Help me!
“When nucleotides are changed in the DNA what happens to the codons in mRNA, and what effects result during protein synthesis?”
Answer:
the ribosome will read the mRNA sequence differently
Explanation:
The change can cause the amino acid to be produced
how is the digestive system important to the muscular system
Answer:
The digestive system is important to the muscular system because it provides the necessary nutrients and energy required for muscle function and growth. The digestive system breaks down food into smaller molecules such as carbohydrates, proteins, and fats, which are then absorbed into the bloodstream and transported to the muscles. The muscles use these nutrients as fuel for energy during muscle contraction and growth. Additionally, the digestive system helps to eliminate waste products that can impair muscle function, such as lactic acid. Therefore, a healthy digestive system is essential for maintaining optimal muscular function and overall physical performance.
Explanation:
Which observations support the law of conservation of mass for electrolytic decomposition of
water
Answer:
1. The total masses of the products (hydrogen and oxygen gases) is equal to the mass of the water that was decomposed.
2. The number of atoms of each element in the reactants is equal to the number of atoms of each element in the products.
3. The total charge of the reactants is equal to the total charge of the products.
Explanation: water.
To be considered a cognitive psychologist, you typically need what degree?
All cognitive psychologists work in academia performing research. T OR F
If you want to pursue a career in cognitive psychology, it is important to participate in a DIS during your undergraduate career. T or F
A Ph.D. or Psy.D. in psychology with a cognitive psychology concentration is normally required to be categorized as a cognitive psychologist. Thus, the choice is between a Ph.D. and a Psy.D.
All cognitive psychologists work in academia performing research. T OR FFalse. While most cognitive psychologists do their study in academic institutions, some may work in governmental, nonprofit, or commercial organizations.
If you want to pursue a career in cognitive psychology, it is important to participate in a DIS during your undergraduate career. T or FFalse. It is not compulsory to pursue a career in cognitive psychology, even though taking part in a Directed Independent Study (DIS) during your undergraduate studies may be advantageous to get research experience in the field. Other options for developing one's research abilities and experience include working in a lab or doing an internship.
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Place the following in order from smallest to largest by atomic radius: Rb, Na, K, Cs, P, He.
Group of answer choices
Cs
P
He
Answer:
He
P
Na
K
Rb
Cs
Explanation:
I am not sure if Na was one of the choices, but if it is this is the order. If not then just take out Na and then it is in the correct order.
Explain why a balloon filled with O2 at room temperature collapses when cooled in liquid nitrogen, whereas a balloon filled with He does not
Answer:
The balloon filled with 02 collapses because the gas molecules are attracted to each other and condense into a liquid when cooled. Helium, on the other hand, is a noble gas that does not form compounds with other elements and therefore does not condense into a liquid at low temperatures.
A sample of neon has a pressure of 56 atm at 29.5 celcius. at what temp in kelvin would the gas exert 75 atm of pressure on the container
Explanation:
Refer to pic..........
Which of the following is NOT an accurate way to measure wavelength?
A. crest to trough
B. trough to trough
C. half crest to half crest
D. crest to crest
Answer:
B. trough to trough is NOT an accurate way to measure wavelength.
Explanation:
The correct way to measure wavelength is from crest to crest or from trough to trough, as these are the points of maximum displacement in the wave. Alternatively, one could measure from a point halfway between two crests (or two troughs) to another point halfway between the next two crests (or troughs), which is known as half crest to half crest measurement.
The accurate ways to measure the wavelength of a wave are between two crests (crest to crest), two troughs (trough to trough), or half crest to another half crest. Measuring from a crest to a trough gives half the wavelength. Therefore, option A (crest to trough) is not an accurate way to measure wavelength.
Explanation:In the context of wave physics, the accurate ways to measure the wavelength of a wave are between two successive crests (crest to crest), or two troughs (trough to trough). The measurement from a half crest to another half crest is also valid, as it essentially represents the same distance as from crest to crest or trough to trough. However, measuring from a crest to a trough does NOT give you the wavelength, but instead it gives you half the wavelength because a complete wave cycle is from crest to crest or trough to trough. Therefore, option A (crest to trough) is NOT an accurate way to measure wavelength.
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Provide the electron dot structure, the molecular formula, and the structural formula for the molecular compounds that will form from their respective atoms below.
Phosphorus 1 and Oxygen 4
Nitrogen 1 and Oxygen 1
Ammonia NH3 and Hydrogen ION H+
Boron 1 and Nitrogen 1
Please help this is for a quiz I need soon
Answer:
Phosphorus 1 and Oxygen 4:
Electron dot structure:
.. .
: P :: O :
.. .
Molecular formula: P4O10
Structural formula:
O
//
O=P-O-P=O
�
O
Nitrogen 1 and Oxygen 1:
Electron dot structure:
: N :
. .
:O:
. .
Molecular formula: NO
Structural formula:
O
//
N=O
Ammonia NH3 and Hydrogen ION H+:
Molecular formula: NH4+
Structural formula:
H
|
H - N - H
|
H
Boron 1 and Nitrogen 1:
Electron dot structure:
: B :
. .
: N :
. .
Molecular formula: BN
Structural formula:
N
/
B=N
Explanation:
Consider the reaction:
CH4 + 2 O2 → CO2 + 2 H2O
Select the true statement:
1. 4.00 moles of CH4 will react with 2.00
moles of O2.
2. The limiting product is CO2.
3. The limiting reactant is CO2.
4. 8.00 moles of O2 can react to produce 144.0 g of H2O.
5. 4.00 moles of O2 can react to produce 4.00 moles of CO2.
6. 88.01 g of CO2 could be produced upon reaction of 64.00 g of O2.
5. 4.00 moles of O2 can react to produce 4.00 moles of CO2.
What is the relationship between moles of O2 and moles of CO2?
The balanced chemical equation shows that 1 mole of CH4 reacts with 2 moles of O2 to produce 1 mole of CO2 and 2 moles of H2O.Therefore, 4 moles of CH4 would react with 8 moles of O2 to produce 4 moles of CO2.Since the ratio of O2 to CO2 is 2:1, 4 moles of O2 would react with 2 moles of CH4 to produce 2 moles of CO2.Therefore, statement 5 is true: 4.00 moles of O2 can react to produce 4.00 moles of CO2.According to the balanced chemical equation, the ratio of moles of O2 to moles of CO2 is 2:1, which means that 4 moles of O2 would react with 2 moles of CH4 to produce 2 moles of CO2. Therefore, statement 5 is true.
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Rank the compounds above based on increasing intermolecular forces. C2H6, CH3F, CH4, NH3
Answer:
The intermolecular forces increase in the following order:
C2H6 < CH4 < CH3F < NH3
The reasoning behind this order is as follows:
C2H6 (ethane) is a nonpolar molecule with only dispersion forces, which are the weakest intermolecular forces.
CH4 (methane) is also nonpolar and only has dispersion forces, but it has a slightly larger molecular weight than ethane, which leads to stronger dispersion forces.
CH3F (fluoromethane) is polar and has dipole-dipole forces in addition to dispersion forces. The dipole-dipole forces are stronger than the dispersion forces in this case.
NH3 (ammonia) is also polar and has hydrogen bonding, which is a stronger type of dipole-dipole force.
Explanation:
How much heat is transferred when the temperature of 36.4g of aluminum
is raised from 32.5°C to 71.6°C?
The amount of heat transferred would be 1269.67 J.
Heat transfer calculationTo calculate the heat transferred (q), we can use the specific heat capacity (c) of aluminum, which is 0.903 J/g°C, the mass of aluminum (m), and the change in temperature (ΔT):
q = m x c x ΔT
where ΔT = (final temperature - initial temperature)
Substituting the given values, we get:
ΔT = 71.6°C - 32.5°C = 39.1°C
m = 36.4 g
c = 0.903 J/g°C
q = 36.4 g x 0.903 J/g°C x 39.1°C
q = 1269.67 J
Therefore, the heat transferred when the temperature of 36.4g of aluminum is raised from 32.5°C to 71.6°C is 1269.67 J.
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what is the iupac name for the following compound? question 20 options: heptaneA. hexaneB. heptaneC. octaneD. nonane
Answer:
what is the IUPAC name for the following compound? question 20 options: heptane A. hexane B. heptane C. octane D. nonane
C. Octane
Explanation:
If 25.0 grams of carbon (graphite) and 66.6 grams of oxygen combine to form carbon dioxide, how many grams of carbon dioxide must form?
According to the question 88.4 grams of carbon dioxide must form.
What is carbon dioxide?Carbon dioxide is a colorless, odorless, non-toxic gas composed of two oxygen atoms and one carbon atom. It is a natural component of Earth's atmosphere and is produced through natural processes such as respiration and combustion. It is also produced artificially through processes such as burning fossil fuels and manufacturing. Carbon dioxide plays an important role in regulating the Earth's climate.
The reaction equation for the formation of carbon dioxide is:
C (graphite) + O2 → CO2
To find the amount of carbon dioxide that must form, we must multiply the number of moles of carbon (graphite) by the molar mass of carbon dioxide (44.01 g/mol).
25.0 g C × (1 mol C / 12.01 g C) × (44.01 g CO2 / 1 mol CO2) = 88.4 g CO2
Therefore, 88.4 grams of carbon dioxide must form.
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ANSWER THE FOLLOWING:
Which of the following is not a characteristic of a sonnet?
14 lines
Blank verse
Iambic pentameter
Rhyme scheme ABAB CDCD EFEF GG
Blank verse is not a characteristic of a sonnet.
What is not a characteristics of a sonnet?Blank verse is not a characteristic of a sonnet. Sonnets are typically written in iambic pentameter and have 14 lines, and the rhyme scheme varies depending on the type of sonnet. For example, the Shakespearean sonnet typically has the rhyme scheme ABAB CDCD EFEF GG, while the Petrarchan sonnet has the rhyme scheme ABBAABBA CDCDCD or ABBAABBA CDECDE. Blank verse, on the other hand, is unrhymed iambic pentameter and is typically used in longer poems or plays.
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Given that hotter blackbodies produce more energy than cooler blackbodies, why do cooler red giants have much higher luminosity than much hotter red dwarfs?
What is pasteurisation
Castration is the method of storing milk there was discovered by Louis Pasteur
Explanation:
Castration is the method of storing milk there was discovered by Louis Pasteur
From his experiments, J. J. Thomson concluded that
cathode ray particles can move at very fast speeds.
cathode ray particles can be moved by electric current.
atoms contain small positively charged particles that are called protons.
atoms contain small negatively charged particles that are called electrons.
J.J Thomson performed some experiments to demonstrates the structure of atom. He discovered the small negatively charged particles later called the electrons. Hence, option d is correct.
What was atomic model by J.J Thomson ?There were various atomic models to describe the structure and electronic properties of atom. J.J. Thomson conducted the cathode ray experiment where, he he hit the cathode ray to and measured the electric charge with electrometer.
From this, he concluded that the electric charge and the cathode rays was combined and are the same entity. The negatively charged particles in the atoms then called as electrons. Therefore, option d is correct.
Thomson demonstrated the plum- pudding model of atom, where the negatively charged electrons are randomly located inside the atom as the seeds in the plum-pudding. But later modern atomic models replaced this concept.
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Calculate the initial rate for an experiment where both I2
and OCl2 are initially present at 0.15 mol/L.
When both I2 и OCl2 are present in 0.15 mol/L at the beginning of the experiment, the starting rate is roughly 0.004 M/s.
Provide a concrete illustration of an experiment.An experiment is described as "a test under controlled circumstances that is made to explain a known truth, to examine the validity of a theory, or even to determine the efficacy from something yet untried" on the inside of the American Heritage Dictionary on the English Language.
How might an experiment be described?If you sprinkle a plant with water, will it grow more effectively? Compare the plant's development before and after spraying it to get a sense of how it is developing without it.
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Method for naming ionic compounds
The cation is mentioned first, followed by the anion, when identifying an ionic compound. Positive and negative charges must be equal. Certain anions with various forms are denoted by Roman numerals.
What procedures are employed while naming ionic compounds?Ionic compounds, which are neutral substances, are made up of positively charged ions, known as cations, and negatively charged ions, known as anions. substances with binary ions (ionic compounds that contain only two types of elements).
What is a naming guideline for ionic compounds?The anion is written after the cation in the name. When a formula unit contains two or more of the same polyatomic ion, the subscript is written outside of the parenthesis.
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each of the following acids: (a) hydroiodic acid, (b) chloric
acid, (c) nitrous acid, (d) H2CO3, (e) HClO4, (f) CH3COOH.
We are aware that the chemical formula for chloric acid is (ClO3) nitrous acid, HNO2HNO2, carbonic acid, perchloric acid, and acetic acid (HClO4). HCl is another name for hydrochloric acid.
Which category of acid is hydroiodic acid in?The term hydroiodic acid, or hydriodic acid, refers to an aqueous solution of hydrogen iodide (HI). In an aqueous solution, it is a strong acid that totally ionizes. It lacks color. A HI of 48 to 57 percent is typical for concentrated solutions.
HClO4 (perchloric acid) is what kind of acid?A strong acid is perchloric acid (HClO4). A strong acid, according to the theories, is one that entirely ionizes or dissolves easily in water. Because it entirely dissolves in water as well, perchloric acid (HClO4) is a potent acid.
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Which of the following is used to keep track of the heat flow inside a calorimeter?
Any time a liquid loses or receives energy, the temperature of the liquid changes.To calculate the amount pf energy change, the calorimeter monitors the weight of the fluid as well as the temperature change.
In a calorimeter, what thermometer is used?The 6000 series calorimeters' control systems serve as the foundation for the 6772 Calorimetric Thermometer, a high precision temperatures measuring device.It is a crucial component of both the 6755 Solution Calorimeter and the 6725 Semi-micro Calorimeter.
What equipment is utilized in calorimetry?The calorimeter is a piece of equipment used in calorimetry, a procedure for calculating heat capacity and measuring the temperature of chemical processes or other physical changes.Among the most popular kinds are differential scanning operating, thermal micro cathode rays, titration calorimeters, and accelerated rate calorimeters.
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