The melting point and the normal boiling point of water in respective temperatures in kelvins are 273 and 373. The correct option is 5.
What is the boiling point?The boiling point is the point of water when the water vapor of the water is equal to the water vapor of the atmosphere.
The melting point is the point when a solid-state converts into liquid, and changes its physical state.
In Celsius, the boiling point is 100⁰C
In Kelvin, 273 + 100 = 373 K
The melting point is ice is 0⁰C
273 + 0 = 273 K
Thus, the correct option is 5. 273 and 373.
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Substituting the residue at position 54 of bvga with which amino acid will least likely prevent the expression of the ptx operon?
a. glycine
b. asparagine
c. glutamate
d. alanine
Glutamate is an amino acid that is put together in the body and also take place commonly in many foods.
Glutamate acts as a neurotransmitter.
Neurotransmitter act as a messenger.
A chemical messenger.
According to question,
C- one and only that is negative charge
As glutamate and aspartate both shore up a negative charge at corporal pH,a interchange of glutamate for an aspartate is the most reactionary and unlikely to act on the BvgA upholder binding and the C- only one that is negative charged of the pTx operon
Glycine, Asparagine and Alanine have no charged.
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Which name is inconsistent with iupac nomenclature rules? 2-ethyl-4-methylhexane 2,3-dimethyl-4-propyldecane 4,5-dimethyloctane 3,3,5-triethyl-3-methylheptane 3,4-dimethyl-4-propyloctane
The correct answer is 4-ethyl-2-propylhexane.
Nomenclature is a device for giving names to matters within a specific career or field. For instance, you may additionally have heard of binomial nomenclature in biology class. It refers to the way of referring to living matters via two names, like calling people Homo sapiens.
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find the number of h atoms present in NH2 CONH2
Answer:
Prolly 4
NH2 CONH2
Explanation:
Copper can have improved wear resistance if alloyed with ceramic alumina, Al2O3. If a copper alloy has 9.3 wt % Al2O3, what is its composition in mol %?
Composition in mole % is 0.091%
Given:
Copper alloy has 9.3 wt % Al2O3 = 9.3 wt/wt%
So the mol % of Al2O3 can be find by
Mole% = w/w% / Mwt
Mwt og Al2o3 = 101.968
Mole% = w/w% / Mwt
= 9.3 / 101.96
Mole% = 0.091%
The term "mole percent" (mol%) refers to the mole fraction in a different format. By multiplying the mole fraction by 100, the mole percent of the specified component can be calculated. Mole fraction multiplied by 100 equals Mole percent.
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7. Which of the following is a molecule?????
(A) K (C) Na
(B) Ne (D) HI ......
Answer:
the answer is
(D) HI
Explanation:
ASAPP!!! CHEM HW HERE
3. Rutherford's gold foil experiment showed several new things abOut the structure of the atom. Which results support the claim that the atomn has a dense, positively charged core? Choose the two statements that apply. A. Some positive particles deflected at sharp angles. B. Some negative particles defiected at sharp angles. C. Most of the positive particles passed straight through the foil. D. Some positive particles bounced back in the direction they came from.
Answer:
D. Some positive particles bounced back in the direction they came from
This country has the most tornadoes in the world every year.
Canada
O United States
O Mexico
O England
Answer:
it's the United states
Explanation:
because It has alot of tornadoes
A sample of ammonia contains 9.0 g of hydrogen and 42 g of nitrogen. another sample of the same compound contains 15.0 g of hydrogen. calculate the amount of nitrogen in the second sample of ammonia.
Mass of nitrogen in the second sample = 70 g.
Simply said, (14.01 + 14.01) = 28.02 amu is the mass of the nitrogen molecule, or N2. This is referred to as the molecular mass, which is just the total atomic masses of all the atoms that make up a certain molecule.
What is nitrogen?Nitrogen is a chemical element with the atomic number 7 and the letter N. Nitrogen is a nonmetal and the lightest element in Periodic Group 15 (also known as the pnictogens). It is a common element in the universe, ranked eighth in the Milky Way and the Solar System in terms of overall abundance. Under normal pressure and temperature, two of the element's atoms combine to form N2, an odourless and colourless diatomic gas. N2 makes up the majority of the Earth's atmosphere, making it the most common uncombined element.Nitrogen is found in all living things, primarily in the amino acids that make up proteins, the nucleic acids that make up DNA and RNA, and the energy-transfer molecule adenosine triphosphate.To learn more about nitrogen, refer to the following link:
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Which substance is likely to contain the highest percentage of double bonds in the hydrocarbon chains of its triglycerides?
Olive oil substance is likely to contain the highest percentage of double bonds in the hydrocarbon chains of its triglycerides.
In organic chemistry, hydrocarbons are organic compounds composed entirely of hydrogen and carbon. [1]:620 hydrocarbons are examples of group 14 hydrides. Hydrocarbons are generally colorless and hydrophobic, and their odor is usually faint or exemplified by the liquid odor of gasoline or lighters. They come in a variety of molecular structures and phases.
Examples of hydrocarbons include gasoline, kerosene, lamp oil, and furniture oil. If someone accidentally drinks a hydrocarbon product that gets into their lungs, it can cause breathing problems. Severe injury or even death can result. Hydrocarbons are the primary energy storage molecules of all major fossil fuels (including coal, oil, and natural gas) and biofuels. It is also a raw material in the manufacturing process of many types of plastics.
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Engineers in russia invented a new way to create colorful art with a ____laser______.
Engineers in Russia invented a new way to create colorful art with constructive laser art.
What is constructive laser art?Modern industrial life and urban space were intended to be reflected in constructivist art. It produces art using industrial manufacturing techniques and inexpensive materials.
The idea behind constructivism was to replace conventional art by emphasizing engineering rather than painting. Russia started a colorful way to create new art.
Thus, Russian engineers developed a fresh method for producing vivid artwork using constructive laser art.
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What is the most-correct statement about the polypeptide with the primary sequence atavistic?
The most appropriate answer among the option is a polypeptide with a primary sequence it contains four nonpolar neutral residues.
What is polypeptide?
A longer, unbroken, continuous peptide chain is known as a polypeptide. Peptides therefore belong to the wide chemical families of biological polymers and oligomers, along with nucleic acids, oligosaccharides, polysaccharides, and others.
A polypeptide with typically more than 50 amino acids is referred to as a protein. One or more polypeptides with a physiologically functional structure make up a protein. Proteins commonly interact with other proteins, other macromolecules like DNA or RNA, or intricate macromolecular complexes.
Amino acids that have been incorporated into peptides are called residues. A water molecule is released as a result of every amide connection.
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Propane, c3h8, is a common fuel used for cooking and home heating. what mass of o2 is consumed in the combustion of 1.00 g of propane?
3.63g of O2 is consumed in the combustion of 1.00 g of propane.
Propane, c3h8, is a common fuel used for cooking and home heating.
C3H8 + 502---> 3CO2 + 4H20.
The combustion equation must first be balanced as illustrated above. The law of constant proportions can then be used to deduce that for every 1 mol of C3H8, there will be 5 mol of O2.
Using significant figures,
1 mol C3H8 -------> 44 g
1 mol O2 ------> 32g x 5 = 160
= 160/ 44g
160g/44g= 40/11 = 3.63g.
= 3.63g of O2 is consumed in the combustion of 1.00 g of propane.
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If you have 9 moles of cacl2 and all the na3po4 i needed, how many moles of nacl could you produce?
If you have 9 moles of CaCl₂ and all the Na₃PO₄i needed 18 moles of NaCl
In the chemical reaction here
CaCl₂ + Na₃PO₄ → Ca₃(PO₄)₂ + NaCl if we balance this chemical reaction then
3CaCl₂ + 2Na₃PO₄ → Ca₃(PO₄)₂ + 6NaCl then Ca=1×3=3
,Cl=2×3=6,
Na=3,PO₄=1,
all this are in reactant Ca=3, Cl=1, Na=1, PO₄=2 all this are in product so NaCl produce 18 moles.
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Which type of bond exemplifies a weak chemical bond? covalent bonds in solution hydrogen bonds in solution ionic bonds in solids nonpolar covalent bonds in solids
Covalent bonds in solution, hydrogen bonds in solution, ionic bonds in solids, nonpolar covalent bonds in solids- the weakest bond is hydrogen bond.
What is a chemical bond?
A chemical bond is a strong bond that can be formed between atoms, ions, or molecules to create chemical compounds. In covalent bonds, the electrons are shared, whereas in ionic bonds, the electrostatic attraction of two ions with opposing charges forms the link. Strong bonds, also known as primary bonds, include covalent, ionic, and metallic ties. Weak bonds, also known as secondary bonds, include dipole-dipole interactions, the London dispersion force, and hydrogen bonds.
Since there is no necessity for an electron exchange during formation, the hydrogen bond is weak. As a result, it is simpler to break apart a hydrogen connection between two molecules.
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You are doing a lab and the instructions tell you to use 100x magnification. you know the eyepiece has 10x the magnification. what objective lens would you use to reach 100x magnification?
The objective lens that would you use to reach 100x magnification is known as the Oil immersion objective lens.
What is Magnification?Magnification may be defined as the process of making enlarged views of smaller objects like cell specimens with the help of tools and devices.
The Oil immersion objective lens is known to have the most powerful magnification with a whooping magnification range of approximately 1000x when significantly combined with a 10x eyepiece.
Therefore, the Oil immersion objective lens is the objective lens that would you use to reach 100x magnification.
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Cobalt-60 is produced by neutron activation. in this process, one neutron is absorbed by the nucleus of the parent isotope. what is the parent isotope? give both the mass number and atomic number.
The parent isotope is cobalt-59 (see the picture below).
The mass number is 59 and atomic number is 27 of the parent isotope.
Neutron activation is the process in which atomic nucleus capture free neutron or neutrons.
Cobalt-60 is produced in nuclear reactors in process of neutron activation from parent isotope cobalt-59 (see the picture below).
Atomic number (Z) is total number of protons and mass number (A) is total number of protons and neutrons in a nucleus.
Cobalt-59 and cobalt-60 are the isotopes of chemical element cobalt.
Isotopes are chemical elements with same atomic number (Z), but different mass number (different number of neutrons).
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If 247.65 grams of barium hydroxide react completely, how many grams of water should theoretically be produced?
If 247.65 g of barium hydroxide react completely, the grams of water produced theoretically should be 52.03 g.
The balanced chemical equation for reaction is :
2HNO₃ + Ba(OH)₂ → 2H₂O + Ba(NO₃)₂
To calculate number of moles, we will use the equation:
Number of moles = Given Mass g
Molar Mass g/mol
Moles of Ba(OH)₂ -
Number of moles = 247.65 g = 1.4454 moles
171.34 g/mol
Stoichiometry is defined as the number before chemical formula in a balanced reaction.
According to stoichiometry, the limiting reagent is barium hydroxide as it limits the formation of product. Yields can only be found using limiting reagent.
1 mole of Ba(OH)₂ produces = 2 moles of H₂O
Therefore, 1.4454 moles of Ba(OH)₂ requires = 2.891 moles
Mass of H₂O is = moles × molar mass
= 2.891 × 18 = 52.03 g
Thus, the theoretical yield produced is 52.03 g
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What is the hydrogen deficiency index (hdi) for a compound with the molecular formula c9h10o?
Hydrogen deficiency index (HDI) for a compound with the molecular formula C9H10O.
What is Hydrogen Deficiency Index(HDI)?
A "deficit" of H atoms would exist if any of the bonds were replaced with double or triple bonds or if rings were involved. We may determine whether and how many multiple bonds and rings are present from the molecular formula by computing the index of hydrogen deficit (IHD). IHD is also known as Unsaturation Degree.
The compound C9H10O has five pi bonds, which is a count of deficiency.
Thus, HDI for C9H10O is five.
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Why is it necessary to keep the temperature constant, but not the concentration of the reactants when determining the rate law expression through the initial rate method?
It is necessary to keep the temperature constant, but not the concentration of the reactants when determining the rate law expression.
What is the rate law expression?
A chemical reaction's rate and the concentrations of the reactants involved are correlated by an expression known as the rate law, commonly referred to as the rate equation or rate law equation.
A frequent way for determining rate laws is the concept of beginning rates. The method includes determining the starting rate of a reaction, as the name initial rate method would imply. To observe how the reaction rate varies, the measurement is repeated for several sets of beginning concentration conditions.
When establishing the rate law expression using the initial rate technique, it is required to maintain a constant temperature but not the reactant concentration because the rate constant fluctuates with temperature. k=Ae^-Ea/RT.
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(a) the element with one more proton in its nucleus than a chlorine atom
false assertion because An electron has a negative charge, whereas a proton has a positive charge. The element has one extra proton in its nucleus than a chlorine atom. The charges are opposing yet of equal magnitude.
A proton is what?A proton is a stable subatomic particle with the symbols p, H+, or 1H+ and an electric charge of +1 e. Its mass is 1836 times greater than that of an electron and only slightly less than that of a neutron.
A proton is a stable subatomic particle with the symbols p, H+, or 1H+ and an elementary electric charge of +1 e. Its mass is 1836 times that of an electron and slightly less than that of a neutron.
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What multiplicities are observed for the signals in the off-resonance decoupled 13c nmr spectrum of 1-chloropropadiene?
13c nmr spectrum of 1-chloropropadiene is two singlet and 1 doublet.
Nuclear Magnetic Resonance NMR spectroscopy is the use of NMR phenomena to study the physical, chemical, and biological properties of matter Carbon-13 is used in NMR because it has an odd mass number. this means that it has a property called spin and behaves a bit like a bar magnet when placed in an external magnetic field. because of this, carbon-13 atoms show up in NMR spectra.1-chloropropadiene structure
1-chloropropadiene structure are Cl-C=C=C two singlet and 1 doublet signals are seen.
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What compound interest per period in percentage would result in the future amount being 1.6 times as large as the starting amount at the end of 10 periods?
The nominal interest rate is therefore 4.8122%.
This compound interest problem can be solved by using the formula
A = P(1+i^)n,
where i = r/n and
A represents the total amount of money accumulated during the nth conversion period.
The nominal interest rate is r.
P is the initial investment's primary amount.
t is the number of years,
n is the number of compounding periods per year.
Assuming P = $100 in this case,
the eventual amount A will be 1.6 * 100 = 160, t = 10 years, and n = 1.
The result of the formula above is Nominal interest rate (in decimal) is equal to n [(A/P)^1/nt - 1].
When we substitute,
we obtain the value r = 1*[(160/100)^1/10 -1].
r = (1.04812 -1)
r =0.048122 (in decimal)
r = 0.048122 *100
r= 4.8122%
The nominal interest rate is therefore 4.8122%.
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What molecules are found in all or almost all organic compounds?
a. Carbon and oxygen
b. Hydrogen and oxygen
C.
Carbon and nitrogen
d. Carbon and hydrogen
Please select the best answer from the choices provided
Ο Α
OB
O C
OD
Which are nutrition components that must appear on the nutrition facts food label?
Total calories (kcal), calories from fat, saturated fat, trans fat, cholesterol, sodium, total carbs, fiber, sugars, protein, vitamin A, vitamin C, calcium & iron are nutrition components that must appear on the nutrition facts food label.
Nutrition is an important factor in health and development. Better nutrition is associated with improved infant, child, and maternal health, stronger immune systems, safer pregnancies and births, reduced risk of non-communicable diseases (such as diabetes and cardiovascular disease), and longer lifespans. doing. Healthy children learn better. Well-nourished people are more productive and can create opportunities to gradually break the cycle of poverty and hunger.
Malnutrition in all its forms poses a significant threat to human health. I'm facing Malnutrition has several forms and including undernutrition (wasting or underdevelopment), inadequate vitamins or minerals, overweight, obesity, and consequent diet-related noncommunicable diseases.
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Which could represent the reaction mixture after the complete combustion of acetaldehyde, ch3cho?
The term that represents the reaction mixture after the complete combustion of acetaldehyde, ch3cho is H-O-H, O-C-O. The correct option is b.
What is complete combustion?Complete combustion is the process of consuming all oxygen in the reaction. In the process of combustion, oxygen is needed for the process. In incomplete combustion, oxygen is not present in the reaction.
In incomplete combustion, less energy is produced because of less oxygen in the reaction.
The inorganic substance that is showing the complete combustion process is H-O-H, O-C-O.
Thus, the correct option is b. H-O-H, O-C-O.
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The question is incomplete. Your most probably complete question is given below:
a. C-O; O-H, O-C
b. H-O-H, O-C-O
c. H-C-C-C-H
d. C-O, O-C, H-H
e. O-C-H, H-H-H
A cube of iron, which has a density of 7.87 g/cm3, has an edge length of 3.75 cm. what is the mass of the sample?
A cube of iron, having a density of 7.87 g/cm3, has an edge length of 3.75 cm, the mass of the sample will be - 19.675 kg.
What is the mass of cube?The volume of a cube is really calculated by multiplying the length by the width and then by the height. The formula yields the measurement of one side cubed since all three measures are the same. In this case, 5 x 3 is equal to 125 cm 3. The volume is multiplied by the known density, or the mass per volume.
Iron Density = 7.87 g/cm3
Volume of Iron = 2500 cm3
Mass=(V)(D)
Mass= (2500 cm3)(7.87 g/cm3)
Mass=19,675g
= 19.675 kg
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The atomic orbital of the quantum mechanical model is very similar to the orbit described by the bohr model. True or false
The given statement is false.
In physics, a quantum (plural quanta) is the minimum amount of any bodily entity (physical property) concerned in an interaction. The vital thinking that a bodily property can be "quantized" is referred to as "the speculation of quantization".[1] This capability that the magnitude of the bodily property can take on only discrete values consisting of integer multiples of one quantum.
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How many covalent bonds are predicted for an atom of cl? enter your answer in the provided box.
Seven covalent bonds are predicted for an atom of cl.
covalent bonds are formed by the mutual sharing of electrons from the atoms taking part in the bonding. Atoms participating in a covalent bond share their valence electrons in a way to complete their octet rule.
A covalent bond depends on the number of electrons that are present in the valence shell. The formation of CH4, H2O, and NH3, are types of covalent bonding.
A chlorine atom has seven electrons in its valance shell so it can form seven covalent bonds.
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Calculate the moles of ammonia present in a 3.939 g sample of ammonia, which has a molar mass of 17.030 g/mol.
The moles of ammonia present in a 3.939 g sample having molar mass of 17.030 g/mol is 0.23 mole.
The mass of one mole of a substance, whether be an element or a compound is known as the molar mass.
If the molar mass of ammonia is 17.030 g/mol, then
In 1 mole of ammonia there are 17.030 g.
So, by definition of molar mass, there are-
17.030 g in 1 mole of ammonia,
In 3.939 g of ammonia, number of moles are -
number of moles = Given mass
Molar mass
moles = 3.939 g = 0.23 mol
17.030 g/mol
The moles of ammonia present in a 3.939 g sample are 0.23 mol.
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