Using body's BMI, Anita weighs 123.92 pounds.
What does a body's BMI mean?Body Mass Index, or BMI, is a rough indicator of an individual's weight status. The BMI is a reliable indicator of your risk for diseases that can develop as a result of having a higher body fat percentage. Your chance of developing certain conditions like heart disease, high blood pressure, type 2 diabetes, gallstones, respiratory issues, and some malignancies increases with your BMI.
Body mass index (BMI) is calculated using the formula [tex]\frac{w}{h^{2} } \times 703[/tex]
Anita is 5 ft 5 in.
Height of Anita in inches = 66 inches
In accordance with the query, we have -
Body mass index formula: [tex]\frac{w}{h^{2} } \times 703[/tex]
BMI = 20
BMI = [tex]\frac{w}{h^{2} } \times 703[/tex]
⇒ 20 = [tex]\frac{w}{66^{2} }[/tex]× 703
⇒ 123.92 pounds
Consequently, Anita weighs 123.92 pounds.
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Is chcl3 polar or nonpolar?.
Chloroform ([tex]CHCl_{3}[/tex]) is a polar molecule due to its asymmetrical shape.
The asymmetrical shape of the molecule [tex]CHCl_{3}[/tex] arises from the presence of the chlorine atom, which has a higher electronegativity than the hydrogen atoms.
This results in the chlorine atom having a partial negative charge and the hydrogen atoms having a partial positive charge.
This unequal distribution of charge gives the molecule a permanent dipole moment, making it a polar molecule and hence chloroform is not a nonpolar molecule.
Additionally, due to the large difference in electronegativity between the chlorine and hydrogen atoms, the molecule exhibits significant dipole-dipole intermolecular forces, which further reinforces its polarity.
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Is CCl4 a polar covalent bond?.
CCl4 is a nonpolar covalent bond.
This is because the molecule has a symmetrical shape, with the four chlorine atoms arranged around the central carbon atom in a tetrahedral formation. Because the electrons are distributed evenly around the central atom, there is no partial charge on any one side of the molecule, making it nonpolar. As a result, the electrons are evenly distributed among the atoms, resulting in no partial charges. This creates a nonpolar bond because there is no separation of charge, meaning the bond is neutral and has no dipole moment. Additionally, chlorine is more electronegative than carbon, so the electrons are pulled closer to the chlorine atoms, further contributing to the nonpolar nature of the bond.
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Identify the reagents needed to carry out each transformation, and identify the name of the reaction for each box
In a chemical reaction, reagents can be used to make, measure, or detect other compounds.
What are reagents in organic chemistry?
The term "reagent" in organic chemistry refers to a chemical component (a compound or combination, often composed of tiny inorganic or organic molecules) added to bring about the desired transformation of an organic substance. The Collins reagent, Fenton's reagent, and Grignard reagents are a few examples.
Reactants fluctuate during a chemical reaction, creating a variety of distinct products. While reactants are used to change compounds into new products, solvents are used to dilute solutions or dissolve soluble materials. This distinguishes solvents from reactants.
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Which term names the result of two or more atoms combined chemically? A. compound B. gas C. element D. reactant
The result of two or more atoms combines chemically is a molecule. A molecule can also be referred as a compound. Hence the answer to the question is Option A.
Any substance or matter that undergoes a chemical change occurring in a given reaction, especially present at the start of the reaction is called a reactant.
A substance or matter in a state in which it expands freely to fill the whole of space as in container, having no fixed shape (unlike a solid) and having no fixed volume (unlike a liquid) is called a gas.
One of a class of substances or components, that cannot be separated or divided into simpler substances by any chemical means is called an element.
A distinctly formed substance formed by chemical union of two or more ingredients/components such as atoms in definite proportion by weight is called a molecule. A molecule is a group or combined state of two or more atoms held together by chemical bonds.
A compound is a substance/matter which is formed by two or more different types of elements/atoms of elements which are united chemically in a fixed proportion.
Thus, All molecules are not compounds. But, All compounds are molecules.
Hence, the correct answer should be Option A i.e. compound.
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Answer:
compound
Explanation:
no.
Halogens exist in different physical states despite being in the same group. Explain why this is so.
Halogens exist in different physical states despite being in the same group because the reliance on the number of electrons. More and stronger interactions between molecules influence higher temperatures (specifically boiling points). As the atoms increase in size, they grow farther from the center point and are less attracted to it.
What i a cenario where it might be important for you to meaure or calculate volume correctly and why
Volume is the amount of space an object takes up. It is typically measured using cubic units, and estimated using a variety of formulas. For example, a rectangular bathtub that is 1 foot tall, 2 feet wide, and 4 feet long will have a volume of 8 cubic feet.
Finding the volume of an object can help us to determine the amount required to fill that object, like the amount of water needed to fill a bottle, an aquarium or a water tank.
How to measure volume“Volume is the measure of the 3-dimensional space occupied by matter, or enclosed by a surface,” according to the National Institute of Standards and Technology’s U.S. Office of Weights and Measures. Simply stated, it is the amount of liquid or gas that will take up a defined space.
Commonly measured in cubic units, the standard unit of volume is a cubic meter. Depending on what you are measuring, you can then break it down into the smaller cubic decimeter—known as a liter—and the cubic centimeter, better known as a milliliter
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Copper oxide (CuO) i reacted with ulfuric acid (H2SO) to make copper ulfate (CuSO4)
and water (H20). A. Calculate the total relative formula ma (Mr) for the reactant of thi reaction
The total relative formula ma (Mr) for CuO is 79 and H2SO4 is 98
What is relative formula mass?
The total of the relative atomic masses of the atoms represented by the numbers in the formula represents the relative formula mass of a substance composed of molecules.
Copper II sulfate is a cyan-blue chemical that is produced when copper (II) oxide, a black solid, reacts with sulfuric acid. Water and copper (II) sulfate are produced by the reaction of copper (II) oxide with sulfuric acid. This reaction can be categorized as either a neutralization reaction or a double displacement reaction.
CuO(s) + H2SO4 (aq) → CuSO4 (aq) + H2O(l)
Relative formula mass, Mr for:
CuO: 63 + 16 i.e. 79
H2SO4: 1*2 + 32 + 4*16 i.e. 98.
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If metal X is lower then metal Y in the activity series, then what would happen?
Metal X replaces Metal Y ions in a solution because it is lower in the activity series than Metal Y. It is a single displacement reaction.
Metal X is above Metal Y in the reactivity series when replacing Metal Y from its respective salts.This replacement is guaranteed since X has a greater reactivity power than Y. If it were less than Y, it wouldn't cause a reaction since it wouldn't move Y.
A single replacement reaction, also known as a single displacement reaction, occurs when one element in a molecule is swapped out for another. Starting ingredients are always pure elements combined with an aqueous compound, such as pure hydrogen gas or zinc metal. A new aqueous compound and a different pure element will be produced as products when a replacement reaction takes place. Below is a general representation of a single replacement reaction.
A+B+C→A+CB
Single displacement reaction occurs where metal X replaces metal Y ions in the solution
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Where are the biggest biodiversity hotspots around the world?
1)Tropical Rain Forest
2)Islands
3)Coral Reef
4)The National Park
Answer: #1 is the awnser
Explanation: trus me
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Phosphorous at 18.9%. According to analysis, sodium, phosphorus, and oxygen make up 42.1%, 18.9%, and 39% of sodium phosphate, respectively.
What is the short definition of percentage composition?The ratio of the amounts of each element to the sum of the individual element amounts present in the compound, multiplied by 100, is the definition of the percentage of a given compound. In this instance, the quantity is expressed in grams of the constituent ingredients.
What distinguishes mass percent from percent composition?The proportional mass of each component of a compound is known as the percent composition. The mass percent of a compound is the weight of an element expressed as a share of the complex's overall mass. For instance, a molecule of water has a structure of one oxygen atom and two hydrogen atoms.
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Why C2H4 is non-polar?.
C2H4, also known as ethylene, is a non-polar molecule because its atoms are arranged symmetrically. The two carbon atoms are at the center of the molecule and are bonded to two hydrogen atoms each. The two hydrogen atoms on one side of the molecule are identical to the two hydrogen atoms on the other side, so there is no overall dipole moment (uneven distribution of electrons) in the molecule. This means that there is no separation of electrical charge and no polar bonds, making C2H4 a non-polar molecule.
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The modern periodic table arranges the element in order of the increasing
O atomic mass
O atomic number
O mass number
O atomic mass unit
Answer:
atomic number
Explanation:
# of protons
A ample of chloroform i found to contain 10. 1 g of carbon, 89. 6 g of chlorine, and 0. 85 g of hydrogen. If a econd ample of chloroform i found to contain 35. 6 g of carbon, what i the total ma of chloroform in the econd ample?
So, the empirical formula will be CHCl3.An ideal anesthetic was originally sought after via the use of the organic chemical chloroform.This substance has a 120.98 g/mol molar mass.
What is chloroform chemical formula?So, the empirical formula will be CHCl3.An ideal anesthetic was originally sought after via the use of the organic chemical chloroform.In 1831, it was initially made.The substance has the formula CHCl3.It is a thick, colorless liquid that has a sweet scent that is widely produced.Compounds of the elements carbon, hydrogen, and chlorine have the empirical formula C2 HCl.The molar mass of this chemical is 120.98 g/mol.It is frequently referred to as "chloroform" because of the molecule's molecular similarity to formic acid (CHOOH) [4].Chloroform can degrade and create dangerous chemicals like phosgene and hydrogen chloride while not being easily flammable.To learn more about chloroform refer
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compare the size of ions to the size of atoms from which they form
Cations are always smaller than the atoms from which they form. Anions are always larger than the atoms from which they form. Ions are usually bigger than the atoms from which they are formed.
When an atom receives or loses electrons, the atom's electron configuration changes, resulting in a net positive or negative charge.
This net charge expands the electron cloud surrounding the nucleus, making the ion bigger in size than the neutral atoms from which it arose. When a metal atom loses one or more electrons to create a cation, it shrinks in size because the positive charge of the nucleus pulls the remaining electrons more strongly.
When a nonmetal atom obtains one or more electrons to create an anion, it normally expands in size.Because of the increasing amount of electrons, the electron cloud surrounding the nucleus grows. It should be noted that this comparison is not absolute and is dependent on the individual factors involved. Some ions are smaller than their neutral atom counterparts, while others are similar in size.
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The complete question is:
Compare the size of ions to the size of atoms from which they form.
how do I balance this?
Answer:
4NaHCO3---->2Na2CO3+2CO2+2H2O
Is NH3 and BF3 polar?.
[tex]NH_{3}[/tex] and [tex]BF_{3}[/tex] are both polar molecules.
This is because [tex]NH_{3}[/tex] has a net dipole moment due to its asymmetrical arrangement of electron distribution, while [tex]BF_{3}[/tex] has a non-zero dipole moment due to its trigonal planar shape.
[tex]NH_{3}[/tex] has a net positive charge at its central nitrogen atom due to the lone pair of electrons, while [tex]BF_{3}[/tex] has a net negative charge at its central boron atom due to its three bond pairs of electrons.
This difference in charge distribution of the two molecules results in a net dipole moment in each molecule.
In conclusion, [tex]NH_{3}[/tex] and [tex]BF_{3}[/tex] are both polar molecules, but [tex]NH_{3}[/tex] is more polar than [tex]BF_{3}[/tex] due to its asymmetrical electron distribution and higher dipole moment.
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How would I balance this?
The balanced equation would be [tex]16Cr(s) + 3S_8(s) --- > 8Cr_2S_3 (s)[/tex].
Balancing chemical equationA balanced chemical equation will have as many atoms of different elements in the products as in the reactants. In other words, a balanced chemical equation will obey the law of conservation of atoms.
According to the law of conservation of atoms, atoms can neither be created nor destroyed but can be converted from one form to another during the course of chemical reactions.
Following this law, the balanced equation for the reaction would be [tex]16Cr(s) + 3S_8(s) --- > 8Cr_2S_3 (s)[/tex]
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This is a two part question
Moles to volume (L). How many liters of H₂ are in
13.74 moles of H₂?
Volume (L) to moles. How many moles of O₂ are in
548 Liters of O₂?
1st question : There will be 308.76 liters of H₂ in 13.75 moles. 2nd question : There will be 24.48 moles of 548 liters of O₂ .
For first part, Given we have 13.74 moles of H₂. We know its molecular mass which is 2 grams/mole. Now calculating the total mass :
⇒molecular mass x moles
⇒ 2 x 13.74
⇒27.48 grams
Now, we know that density = mass/volume, Therefore, Volume = mass/density. The density of Hydrogen gas is 0.089 g/l
∴ total mass/ density = volume
⇒27.48 grams/0.089 g/l
⇒308.76 liters
For 2nd part, We can calculate total mass of Oxygen gas by the same density formula which is mass = density x volume. The density of oxygen gas is 1.43 g/l. Therefore,
⇒1.43 x 548
⇒783.64 grams
Now, we can calculate moles by dividing total mass by molecular mas (molecular mass of oxygen gas is 32 grams/mole)
⇒ 783.64/32
⇒24.48 moles
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what is the purpose of adding alum to water during the water treatment process?
The benign liquid alum (aluminium sulphate) is frequently used in water treatment facilities to clear drinking water.
It has been utilised in lakes since the early 1970s to lessen the phosphorus content of the water.
Alum dissolves in water and makes the pollutants in suspension heavier, causing them to settle down more quickly. So, loading refers to the addition of alum.
The most frequent use of alum in water treatment is as coagulants. Impurities were made larger by coagulants so they would settle in the sedimentation tanks. Pathogens found in the water can be killed by alum as well.
It facilitates sludge settlement in the secondary clarifiers, which improves the efficiency of the recycled water treatment process by allowing for the passage of cleaner, less turbid water. Additionally, struvite does not accumulate inside the digesters as a result of the alum in the effluent.
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T/F All amino acid based hormones are lipid soluble and can cross the plasma membrane.
False All the amino acid based hormones are not lipid soluble and can not cross the plasma membrane.
Amino acid-derived as well as polypeptide hormones are water-soluble and insoluble in lipids. These hormones cannot pass through the plasma membranes of the cells; therefore, their receptors are found on the surface of the target cells.
Amino acids are those molecules which will combine to form proteins. When the proteins are digested or broken down, amino acids will be left. The human body uses amino acids to make proteins to help out the body: Repair body tissue, Grow, and Perform many other body functions.
Amino acids are also be used as a source of energy by the body.
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48 liters of co2 is kept at -33 degrees Celsius,at what temperature will the volume double
Answer:
The temperature is kept constant. What new volume does the gas occupy? Two hundred liters of gas at zero degrees Celsius are kept under a pressure of 150 kPa.
Explanation:
Oxygen gas is at a temperature of 40°C when it occupies a volume of 2.3 liters.
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Phosphorous at 18.9%. According to analysis, sodium, phosphorus, and oxygen make up 42.1%, 18.9%, and 39% of sodium phosphate, respectively.
What is the short definition of percentage composition?The ratio of the amounts of each element to the sum of the individual element amounts present in the compound, multiplied by 100, is the definition of the percentage of a given compound. In this instance, the quantity is expressed in grams of the constituent ingredients.
What distinguishes mass percent from percent composition?The proportional mass of each component of a compound is known as the percent composition. The mass percent of a compound is the weight of an element expressed as a share of the complex's overall mass. For instance, a molecule of water has a structure of one oxygen atom and two hydrogen atoms.
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If motion can produce electric currents from a magnetic field, how could magnets on a railroad provide electricity to a train?
Magnets on a railroad provide electricity to a train by electrifying the propulsion loops generates magnetic fields that both pull the train forward from the front and push it forward from behind.
What is a magnetic field?A magnetic field is described as a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.
Electrodynamic suspension (EDS) uses superconducting electromagnets or strong permanent magnets that create a magnetic field, this magnetic field induces currents in nearby metallic conductors when there is relative movement and hence pushes and pulls the train towards the designed levitation position on the guide way thereby providing electricity.
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If 2.09 mol of ethane (C₂H6) undergo combus-
tion according to the unbalanced equation
C₂H6+ O2 CO₂ + H₂O,
how many moles of O₂ is required?
Answer in units of mol. Answer in units of
mol.
Biodiversity hotspots are areas that have been characterized by
A being most threatened areas with high diversity of species
B being located in only one region around the world
C having low diversity of organisms
D are not threatened by human activities and loss of habitat
Answer:
Pretty sure it's A
Explanation:
What do you understand by molar mass?.
Answer:
Molar mass is the mass of a substance that has 6.022 × 1023 atoms
How many moles of NaOH are needed to make with 45 120 mL of 15% (mass/volume) solution?
360 moles of NaOH are needed to make with 45 120 mL of 15% solution.
What is mole ?The term mole is defined as one mole of any substance is exactly equal to its atomic mass or molecular mass. It is expressed in grams.
The mole is also define as the amount of substance of a system which contains as many elementary entities. 1 mole = 6.023 X 10²³
Multiply the molarity by the volume of solution to get the number of moles of solute.
moles of solute = molarity × volume of solution
= 45 × 120 / 15
= 360 moles.
Thus, 360 moles of NaOH are needed to make with 45 120 mL of 15% solution.
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Would you expect hexane to be soluble in water why?
Hexane is not soluble in water.
Hexane is a hydrocarbon compound and is composed of only carbon and hydrogen atoms. Hydrocarbons are nonpolar molecules, and therefore they do not interact well with polar molecules such as water. Because of this, hydrocarbons like hexane tend to be insoluble in polar solvents like water.
Water molecules are polar, which means that they have a partial negative charge on one end and a partial positive charge on the other end. Nonpolar molecules such as hexane, do not have any charges, they do not interact well with water molecules because they do not have any charges to form hydrogen bonds with water molecules.
Furthermore, Hexane is less dense than water, which means that it will float on top of water and will not mix with it.
In summary, hexane is not expected to be very soluble in water because it is a nonpolar hydrocarbon and does not have any charges to interact with the polar water molecules.
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The amount of energy required to change 20g of H₂0 to steam is +50 kJ. Calculate the standard heat of vapourization.
The standard heat of vaporization of H₂0 is +2.5 kJ/g.
What is standard heat?The standard heat of formation of a compound is described as the change of enthalpy during the formation of 1 mole of the substance from its constituent elements in their reference state, with all substances in their standard states.
To calculate it, we need to divide the total energy required to change the 20g of H₂0 to steam by the amount of substance being vaporized.
The amount is 20 g
the total energy required = 50kj
Therefore the standard heat of vaporization of H₂0 is 20/50 = +2.5 kJ/g
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How many molecules are present in 64g of SO2?.
To calculate the number of molecules present in 64 grammes of SO2, you first need to know the molar mass of SO2. The molar mass of SO2 is 64.06 g/mol.
Then, you can use the formula: moles = mass divided by molar mass
So, SO2 moles = 64/64.06
The molecular weight of SO2 is approximately 0.998.
Then, you can use Avogadro's number, which is 6.022 x 1023, to calculate the number of molecules:
Molecules = moles multiplied by Avogadro's number
So, molecules of SO2 = 0.998 x 6.022 x 1023
The number of molecules of SO2 present in 64 grammes is approximately 6.00 x 1023.
Note: This is an approximation because the real number of molecules present in 64 g of SO2 can be affected by experimental errors or other sources of uncertainty.
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