Electromagnetic wave travels faster through air than metal.
Option A
Explanation:
There are different kinds of wave energy. The most significant are electromagnetic and mechanical waves. The mechanical waves propagate through the medium by transfer of energy by vibrating of particles in medium.
So, the more number of particles present in the medium, the more fast the mechanical wave can propagate. So the mechanical waves travel faster in metals consisting of more number of free charge carriers. But electromagnetic waves does not need any of the medium to propagate. So it can travel faster in air than in metals.
which is a determine factor for the direction a motor spins in an electric motor.
Answer:
Magnet determine factor for the direction a motor spins in an electric motor.
If 8.00 miles of NH3 of 10.00 moles of O2 react in the following reaction, how many moles of which reactant will be left over
Answer:
No moles will be left over of either reactant because both are limiting.
Explanation:
4NH₃ + 5O₂ → 4NO + 6H₂O
8 mol 10 mol
Process of genetic engineering
Genetic engineering is the process of using recombinant DNA (rDNA) technology to alter the genetic makeup of an organism. Genetic engineering involves the direct manipulation of one or more genes. Most often, a gene from another species is added to an organism's genome to give it a desired phenotype. It involves 3 steps:
(1) The isolation of DNA fragments from a donor organism;
(2) The insertion of an isolated donor DNA fragment into a vector genome
(3) The growth of a recombinant vector in an appropriate host.
An example of genetic engineering is production of insulin. In plants, genetic engineering has been applied to improve the resilience, nutritional value and growth rate of crops, for example, potatoes, tomatoes and rice.
In animals it has been utilized to develop sheep that produce a therapeutic protein in their milk that can be used to treat cystic fibrosis, or worms that glow in the dark to permit scientists to become more familiar with diseases such as Alzheimer’s.
Please this is due tomorrow!!!
A little quantity of trichloromethane (b.pt. 60° C) was added to a large quantity of ethanol (b.pt. 78°C). The most probable boiling point of the
resultant mixture is from
A. 69°C - 70°C
B. 70°C - 74°C
C. 82°C - 84°C
D. 60°C - 78°C
Answer:
the correct answer is C
The boiling point of the mixture of trichloromethane and ethanol is likely to be within the range of 60°C to 78°C. However, due to the larger quantity of ethanol with a higher boiling point, it is likely to be closer to 78°C.
Explanation:The boiling point of a mixture depends on the individual components and their proportions. Here, we have trichloromethane (boiling point 60°C) and ethanol (boiling point 78°C). Even though a small quantity of trichloromethane is added, since the boiling point of ethanol is higher, it is likely that the mixture will start to boil close to the boiling point of ethanol. The boiling point of most mixtures is typically within the range of the components' boiling points.
Therefore, we can say that answer D (60°C - 78°C) is a likely range for the resultant boiling point of the mixture, but the actual boiling point is more likely to be closer to 78°C, the boiling point of ethanol. The specific boiling point would depend on the exact proportions of the two substances in the mixture.
Learn more about Boiling Point here:https://brainly.com/question/34261956
#SPJ2
Which type of spectrum does the illustration A
show?
continuous
bright line
dark line
Answer:
(A)-Continuous
Continuous type of spectrum does show the illustration A. Therefore, option A is correct.
What does a continuous spectrum show?A continuous spectrum contains all light wavelengths within a specific range. Hot, dense light sources, such as stars, emit a nearly continuous spectrum of light that travels in all directions and interacts with other materials in space.
Continuous spectra also known as thermal or blackbody spectra are produced by dense gases or solid objects that emit heat. They emit radiation at a wide range of wavelengths, giving the spectra a smooth and continuous appearance.
The visible "electromagnetic spectrum" is a continuous spread of all spectral colors organized by wavelength.
Thus, option A is correct.
To learn more about the continuous spectrum, follow the link;
https://brainly.com/question/22582267
#SPJ6
Which is a component of cell theory
The generally accepted parts of modern cell theory include: All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms.
Answer: what they said ^ is correct :>
Btw whoever reads this I hope u do good!
Explanation:
what is the mass, in grams, of 0.0287 mol of sucrose
Answer: 9.82401 grams
4. The average kinetic energy of water molecules is greatest in
O liquid water at 273 K
O ice at 0°C
O liquid water at 90°C
O steam at 100°C
Answer:
steam at 100°C
Explanation:
Grandpoint approved
The average kinetic energy of water molecules is greatest in steam at 100°C.
Kinetic energy of waterWater is a polar solvent that has potential energy on its own which can be converted to kinetic energy once the water is in motion.
The kinetic energy is that energy that a moving body possesses.The faster a molecule moves, the more kinetic energy it has, and the higher the measured temperature.
That being said, when the temperature of water is increased, there would be increased molecular motion leading to a higher kinetic energy.
Therefore, the average kinetic energy of water molecules is greatest in steam at 100°C.
Learn more about kinetic energy here:
https://brainly.com/question/25959744
Why does food have potential energy?
Answer:
So that if we feel weak, energy is released through it so we can do work and do stuff like walk or think. It's like stored energy that can do things for the future.
Please give brainliest if it helped.
Food has potential energy because it contains stored chemical energy. The potential energy in food comes from the energy captured by plants through the process of photosynthesis.
During photosynthesis, plants convert sunlight, water, and carbon dioxide into glucose and other organic molecules.
Glucose, along with other carbohydrates, fats, and proteins present in food, is a rich source of potential energy.
The energy stored in these molecules is in the form of chemical bonds. When we consume food, our bodies break down these complex molecules through digestion and metabolic processes.
To learn more about potential energy, follow the link:
https://brainly.com/question/24284560
#SPJ6
How many molecules of the sweetener saccharin can be prepared from 30 C atoms, 25 H atoms, 12 O atoms, 8 S atoms, and 14 N atoms?
To determine the number of saccharin molecules in a given sample, you can use the molar mass and Avogadro's number. The molar mass of saccharin is 183.18 g/mol and Avogadro's number is approximately 6.022 x 10^23 molecules/mol. By plugging in these values and doing the appropriate calculations, you can find the desired quantities.
Explanation:To determine the number of molecules of saccharin that can be prepared, we need to first calculate the molar mass of saccharin. The formula for saccharin is C7H5NO3S, which gives a molar mass of (7*12.01) + (5*1.008) + (1*14.01) + (3*16.00) + 32.06 = 183.18 g/mol.
With this information, we can calculate the number of saccharin molecules in a 0.0400 g sample by using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol. So, (0.0400 g / 183.18 g/mol) * (6.022 x 10^23 molecules/mol) = X molecules of saccharin.
To find the number of carbon atoms in the same sample, we can again use the molar mass and Avogadro's number. (0.0400 g / 183.18 g/mol) * (6.022 x 10^23 molecules/mol) * 7 carbon atoms/molecule = Y carbon atoms.
Are C-12, C-13, and C-14 all carbon isotopes?
Answer:
Yes, they are isotopes.
Explanation:
Isotopes are atoms with the same atomic number Z and a different mass number (A). That is, they differ in the number of neutrons (eg carbon 12, has 6 protons, 6 electrons, and 6 neutrons, carbon 13, 7 neutrons, and carbon 14 8 neutrons).
for multiple covalent bonds to form in molecules the molecules must contain carbon nitrogen or
For multiple covalent bonds to form in molecules, the molecules must contain carbon nitrogen or oxygen.
Explanation:
Think about carbon dioxide (CO2). If every oxygen atom imparts one electron to the carbon molecule, there will be 6 electrons in carbon particle and 7 electrons in every oxygen atom. This doesn't give the carbon atom as a total octet.Sometimes more than one set of electrons is shared between two atoms. In carbon dioxide, a second electron from every oxygen atom is likewise imparted with the central carbon atom, and the carbon particle imparts one more electron with every oxygen atom. Two sets of electrons shared between two atoms make a double bond between the atoms. A few particles contain triple bonds, covalent bonds in which three sets of electrons are shared by two atoms.Determine the moles of NH3 that can form from 70.0 grams N2.
Hey there!
5 moles will be produced.
N₂ has a molar mass of 28.014 g/mol.
Convert 70g to mol:
70 ÷ 28.014 = 2.5
In N₂ there are 2 nitrogen atoms. In NH₃ there is 1 nitrogen atom.
So, there will be twice as many moles of NH₃ because every one molecule of N₂ will produce two molecules of NH₃.
2.5 x 2 = 5 moles
Hope this helps!
How is potential measured?
What is the meaning of the word organism
Answer:
B) any complex thing with properties normally associated with living things
Answer:
Organism is a creature such as plant ,animals and living things or a single-celled life form
Explanation:
The living creature is compared with the interdependent part of the organism. Some of the Example for the organism is dog, bacteria or unicellular animal-like amoeba. This organism can be classified by naming and grouping. The biology name of an organism is called Taxonomy. Classification of an organism help in exploring the unknown potential of many helpful organisms.Due to their classification we can restore the ecosystem, which is imbalanced today.
What type of energy does a rock resting on top of a hill have?
Electrical energy
Kinetic energy
Potential energy
Radiant energy
Answer:
Potential energy
Explanation:
Balance the following chemical equation if necessary:
V2O5 (s) + HCl (aq) ---> VOCl3 (s) + H2O (l)
The balanced version of the chemical equation V2O5 (s) + HCl (aq) --> VOCl3 (s) + H2O (l) is: V2O5 (s) + 6 HCl (aq) --> 2 VOCl3 (s) + 3 H2O (l). This balance is achieved by ensuring an equal number of each type of atom on both sides of the equation.
Explanation:To balance the given chemical equation, we need to ensure there are equal numbers of each type of atom on both sides of the equation. Let's start with vanadium (V) and chlorine (Cl) atoms, as they are only in one reactant and one product:
V2O5 (s) + 2 HCl (aq) ---> 2 VOCl3 (s) + H2O (l)Now we have two vanadium atoms on both sides, but the number of chlorine atoms is not balanced yet. We'll increase the number of hydrochloric acid (HCl) molecules:
V2O5 (s) + 6 HCl (aq) ---> 2 VOCl3 (s) + H2O (l)Last, let's balance the number of hydrogen (H) and oxygen (O) atoms. We'll also add some water molecules:
V2O5 (s) + 6 HCl (aq) ---> 2 VOCl3 (s) + 3 H2O (l)So the balanced equation is: V2O5 (s) + 6 HCl (aq) --> 2 VOCl3 (s) + 3 H2O (l).
Learn more about Balancing chemical equations here:https://brainly.com/question/28294176
#SPJ12
The question is about balancing a chemical equation. The balanced equation for V2O5 (s) + HCl (aq) ---> VOCl3 (s) + H2O (l) is V2O5 (s) + 6HCl (aq) ---> 2VOCl3 (s) + 3H2O (l)
Explanation:The subject of this question relates to the balancing of a chemical equation. The chemical equation provided: V2O5 (s) + HCl (aq) ---> VOCl3 (s) + H2O (l) needs to be balanced, that is, the number of atoms of each element on the reactant (left) side of the equation have to equal the number of atoms of each element on the product (right) side of the equation. In this case, the balanced chemical equation would be V2O5 (s) + 6HCl (aq) ---> 2VOCl3 (s) + 3H2O (l)
Learn more about Balancing Chemical Equation here:https://brainly.com/question/28294176
#SPJ2
How many molecules are in one mole of NH3?
Answer:
1 mole of NH3 has 6.023×10^23 molecules.
Calculate the volume of 0.413 mol of hydrogen gas at a temperature of 20°C and a pressure of 1200 torr.
Answer:
The volume is 6, 28 liters
Explanation:
The unit of pressure and temperature must be converted. 760 Torr = 1 atm and 0°C=273 K. 20+273=293K
760 Torr---1 atm
1200Torr--x= (1200 Torr x 1 atm)/760 Torr =1,58 atm
PV=nRT V=(nRT)/P
V= (0,413 mol x 0,082 L atm /K mol x 293K)/ 1,58 atm
V=6, 28 L
The property of water in which it attaches to another surface is known as: *
Answer:
The property of water which makes it to attach or stick to another surface is Adhesion.
Explanation:
Adhesion is the characteristic ability a substance possess to stick to other substances. This is as a result of the covalent bond existing between the two hydrogen atoms and the one oxygen atom in the water molecule.
An example of the property of Adhesion is a water drop that stuck to the end of the pine needles
What numbers should be added to the blanks to balance this chemical equation? ___F2 + __ H20 --------> ___OF2 + ___HF
A) 2,2,1,2
B)2,1,1,2
C)3,2,1,4
D)1,2,2,1
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
[tex]2F_2+H_2O\rightarrow OF_2+2HF[/tex]
Thus in the reactants, there are 2 atoms of hydrogen , 1 atom of oxygen and 4 atoms of flourine.Thus there will be atoms of hydrogen , 1 atom of oxygen and 4 atoms of flourine in the product as well.
Learn more about conservation of mass
https://brainly.com/question/12335419
https://brainly.com/question/11954533
2. What does it mean to say a bond is polar?
Answer:
Explanation:
Means in between two bonded atoms one is more electronegative than other the one which is more electronegative has partial negative charge and the other which has less electronegativity has partial positive charge
Final answer:
A polar bond refers to the unequal distribution of electron density between two atoms due to a difference in electronegativity.
Explanation:
The polarity of a bond refers to the unequal distribution of electron density between two atoms.
A bond is considered polar when there is a significant difference in electronegativity between the bonded atoms, resulting in one atom being more electron-attracting than the other.
For example, in a bond between hydrogen (H) and oxygen (O) in a water molecule (H2O), the oxygen atom is more electronegative than the hydrogen atoms, causing the oxygen atom to attract electrons and develop a partial negative charge (δ-) while the hydrogen atoms have a partial positive charge (δ+).
Of the total base sequence in human DNA, what percentage codes for proteins? A) Nearly 50 percent
B) About 5 percent
C) About 90 percent
D) 100 percent
Answer:
The correct answer is B)About 5 percent
Explanation:
The approximate total size of the human nuclear genome is 3,200,000,000 base pairs. 1 to 1, 4% encode proteins, 24% are non-coding regions and the rest correspond to intergenic regions.
Of the total base sequence in human DNA, only about 5 percent code for proteins (Option B).
DNA is a double helix molecule composed of two long chains of nucleotides.This molecule (DNA) is composed of sequences that encode proteins called genes and non-coding regions, which often play regulatory functions (i.e., non-coding nucleotide sequences are mainly involved in the regulation of gene expression).According to the human genome sequencing project, only 5% (or even a lesser proportion) of the human genome encode for proteins, thereby the remaining DNA consists of repetitive non-coding sequences.In conclusion, of the total base sequence in human DNA, only about 5 percent code for proteins (Option B).
Learn more in:
https://brainly.com/question/2395967
what is one characteristic of sulfur
Answer:
Sulfur is a soft, pale yellow, odorless, brittle solid. It is insoluble I. carbon disulfide. It burns with a blue flame, oxidizing to sulfur dioxide. Sulfur exists in several crystalline and amorphous allotropes.
Sulfur has the ability to form thiols which are known for their potent odors, a characteristic shared with oxygen as they are in the same group on the periodic table. Hydrogen sulfide is an example of a toxic sulfur compound with a strong smell.
Explanation:One characteristic of sulfur is its ability to form thiols, which are the sulfur analogs of alcohols. Thiols, such as methanethiol (CH3-SH) and the garlic odorant prop-2-ene-1-thiol (CH2=CH-CH2-SH), are known for their strong and often unpleasant odors. For example, methanethiol is present in oysters, cheddar cheese, onions, and garlic, contributing to their unique smells. Sulfur is part of the same group (6A) as oxygen on the periodic table, and mirrors some of oxygen's properties, including the ability to replace oxygen in organic compounds, such as alcohols, forming thiols. Hydrogen sulfide (H2S), another sulfur compound, is noteworthy for its colorless appearance yet potent smell of rotten eggs and its high toxicity, which is comparable to that of hydrogen cyanide.
How many Liters are in 13 moles Acetylene (C2H2) at STP?
Answer:
291.2L
Explanation:
Given parameters:
Number of moles of acetylene = 13moles
Unknown:
Volume of acetylene at STP = ?
Solution:
The problem can be solved by applying the equation that shows the relationship between the volume of gases at STP and their number of moles.
Volume of gas at STP = number of moles x 22.4
Input the variables and solve;
Volume of gas at STP = 13 x 22.4 = 291.2L
Final answer:
To find the number of Liters in 13 moles of Acetylene (C2H2) at STP, we use the Ideal Gas Law equation. Plugging in the given values, we find that there are approximately 302.19 Liters.
Explanation:
To determine the number of liters in 13 moles of acetylene (C2H2) at STP, we need to use the Ideal Gas Law. The Ideal Gas Law equation is PV = nRT, where P is pressure, V is volume, n is moles, R is the ideal gas constant, and T is temperature. At STP (standard temperature and pressure), the pressure is 1 atm and the temperature is 273.15 K. Since we are given the number of moles (13) and want to find the volume, we rearrange the equation to solve for V: V = nRT/P.
Plugging in the values, we get V = (13 mol)(0.08206 L·atm/mol·K)(273.15 K)/(1 atm) = 302.19 L.
Write a balanced equation for zinc sulfate heptahydrate + sodium carbonate —> zinc carbonate + sodium sulfate
Answer:
I gotta go - but think heat or solubility, what can you drive away with heat and by what is it is not soluble...it is a catch all answer - but rarely is there ONE WAY ONLY! Good luck.
Explanation:
The balanced chemical equation for the reaction between zinc sulfate heptahydrate and sodium carbonate is: ZnSO₄•7H₂O + Na₂CO₃ → ZnCO₃ + Na₂SO₄ + 7H₂O.
To write a balanced chemical equation for the reaction between zinc sulfate heptahydrate (ZnSO₄•7H₂O) and sodium carbonate (Na₂CO₃), we follow these steps:
Step-by-Step Solution:
Write the unbalanced equation: ZnSO₄•7H₂O + Na₂CO₃ → ZnCO₃ + Na₂SO₄ + 7H₂OIdentify the states of the compounds: ZnSO₄•7H₂O (aq), Na₂CO₃ (aq), ZnCO₃ (s), Na₂SO₄ (aq), 7H₂O (l).Break down the compounds into their respective ions:Balanced Equation:
ZnSO₄•7H₂O (aq) + Na₂CO₃ (aq) → ZnCO₃ (s) + Na₂SO₄ (aq) + 7H₂O (l)What are the characteristics of an atom or molecule when in the gas phase
Answer:vapor
Explanation: Because it is
Answer:
nonrigid shape or volume; highly active and mobile
Explanation:
what is the relationship between carbon atoms and boiling point
The relationship between carbon atoms and boiling point is:
When carbon atoms' number is more, the boiling point is also higher. For the alkaline that have the formula [tex]\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}+2}[/tex], as the carbon atoms' number increases, the melting or boiling point gets increased.
The reason for this is that long chain molecules have higher boiling points. This is because these long chains get wrapped around and it is very difficult to separate them whereas in shorter chains, they have weak forces and it is easy to separate them.
Molecules that have a strong bonding between them have a greater inter molecular force and so cannot move easily. Hence the kinetic energy is also slow between these molecules. Such molecules have higher boiling point.
What are the environmental pressures of the plant the cactus. Or what are the variations of the plant called the cactus
The most well-known threat is posed by human pressures brought on by the spread of agriculture, housing, and commercial space into cactus ecosystems .Cereus, Rebutia etc are a few of the more popular cacti groups.
A desert-dwelling plant with strong stems and sharp projections called spines. The term "cactus" is derived to the Greek word "kaktos," which was also the name of a kind of spiky plant that is frequently seen in Sicily: the cardoon. The word's earliest recorded use in English, describing the emerald-green, leafless plants found in the American desert, goes back to 1769. The most well-known threat is posed by human pressures brought on by the spread of agriculture, housing, and commercial space into cactus ecosystems .Cereus, Rebutia etc are a few of the more popular cacti groups.
To know more about cactus, here:
https://brainly.com/question/16636755
#SPJ6
Please Help
In an acid-base reaction, the _______ are a salt and water. A) acid B) base C) reactants D) products
Answer:
D
Explanation:
In an acid base reaction, the products are salt and water because acid base reactions react to neutralize the acid and base properties, producing a salt.