Water in a 150 ml container volume with a diameter of 12 cm evaporates faster and therefore has a greater vapour pressure than a container with a volume 75 ml and a diameter of 5.5 cm, because the diameter of 150 ml container is more and more space is exposed, so it evaporates more quickly in lesser time.
The vapour pressure is due to escaping tendency of water molecule from surface of liquid. Vapour pressure is dependent on the number of molecules on the surface of liquid.
If number molecules on surface of molecules is greater, greater would be the vapour pressure.
Since, 150 mL container is with 12 cm diameter, its surface area is larger and it has more number of water molecules on the surface. So, it has greater vapour pressure than the 75 ml container and the water also evaporates faster due to large surface area and more exposure.
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i need the answers pleaseee! this is acids and bases for chemistry
gold is fcc and has a lattice constant of 0.40788 nm. calculate a value for the atomic radius of a gold atom in nanometers.
Gold is fcc and has a lattice constant of 0.40788 nm . The value for the atomic radius of a gold atom in nanometers is 0.14421 nm. .
A gold atom touches another along the diagonal on each face of the unit cell of a fcc lattice, which has right angles. Typically, the diagonal is shown as extending from the center of one atom to the center of a second atom and to the center of a third atom. As a result, one can construct a right triangle whose hypotenuse is 4r, where r is the radius of a gold atom, and whose legs both have lengths of a = 0.40788 nm. By applying the Pythagorean theorem,
a^2 + a^2 = ( 4r )^2,
2 a^2 + = (16r^2) ,
and r = (21/2/4)a,
where an is the stated covalent atomic radius of gold and r is 0.14421 nm.
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compound present in many foods has the formulka c44h86o8np. to which class of molecules does this compound belong?
Lipids the compound present in food with formula C₄₄h₈₆O₈NP
Elaborating :The compound with a formula C₄₄H₈₆O₈NP is understood as phosphatidylethanolamine. it's the second most abudant phospholipid in animal and plant lipid, after phosphotidylcholine. It is present in many foods. Also a main lipid component of microbial membranes. it's found in all living cells and compose of 25% of all phospholipids.
What is the role of lipids in food?
They are important in the diet as energy sources and as sources of essential fatty acids and fat-soluble vitamins, which tend to accompany fats. They also contribute satiety, flavor, and palatability to the diet.Dietary lipids are primarily oils (liquid) and fats (solid). Commonly consumed oils are canola, corn, olive, peanut, safflower, soy, and sunflower-seed oil . Foods rich in oils include dressing , olives, avocados, spread , nuts, seeds, and a few fish. Fats are found in animal meat, dairy products, and cocoa butter
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A baseball’s resultant velocity is 17.23 m/s, at 26.02° from the level ground. Determine the horizontal component of the baseball’s velocity.
A baseball’s resultant velocity is 17.23 m/s, at 26.02° from the level ground then the horizontal component of the baseball’s velocity is 15.4835m/s
Velocity means the direction of the movement of the body or the object here given data is velocity =17.23 m/s, at angle= 26.02° and we have to find horizontal component of the baseball’s velocity=?
So, Horizontal distance can be expressed as x=V × t
Cos26.02°=x/17.23 for vector component, this means that the
17.23cos26.02°= x horizontal component is the hypotenuse length
x=15.4835m/s is the horizontal component of the baseball’s velocity
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How many molecules of nh4br are in 3.166 g of nh4br? show the conversions required to solve this problem and calculate the molecules of nh4br.
0.19264 × 10^23 molecules of NH4Br are there in 3.166g of NH4Br.
Given
Mass = 3.166g
Molecular mass of NH4Br = 97.94
Moles = Given mass / molar mass
Moles = 3.166 / 97.94
Moles = 0.032
To get number of molecules
Molecules = Moles × 6.02 × 10^23
= 0.032 × 6.02 × 10^23
Molecules = 0.19264 × 10^23
Depending on the context, the term may or may not include ions that fit this condition. A molecule is a collection of two or more atoms held together by the attractive forces known as chemical bonds.
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How many nucleoside triphosphate molecules does gluconeogenesis consume to make one glucose? group of answer choices 5 2 1 6 4
Answer:
2
Explanation:i had this same question
A sample of small, soluble organic molecules was analyzed and found to contain the elements carbon, oxygen, hydrogen and nitrogen. it is most likely that the molecules were?
The sample most likely to be a protein .
Amino acids, which are smaller building blocks of proteins, are linked together in lengthy chains to form proteins. To create a protein, 20 distinct kinds of amino acids can be mixed. Each protein's precise function and distinctive 3-dimensional structure are determined by the order of the amino acids.
Combinations of three DNA building units (nucleotides), which are dictated by the order of genes, are used to code for amino acids.
The main functions of the proteins are determined below:-
proteins are responsible for a Biochemical reaction to happen.Some proteins are hormones ,which acts as messengers in our body.have main role in building immuno system, helps to form immuniglubolins or antibodies.Transports and store nutrients.helps in overall growth and development of the body.To learn more about protein, refer this link
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these are two of the most energy-demanding operations in the malthouse and brewery. group of answer choices packaging fermentation cooling wort boiling malt kilning
boiling malt kinling are two of the most energy-demanding operations in the malthouse and brewery.
What is malthouse and brewery?
A facility where cereal grain is turned into malt by soaking it in water, allowing it to sprout, and then drying it to inhibit further growth is known as a malt house, malt barn, or maltings. The malt is utilised in the production of beer, whisky, and some meals. During the 20th century, traditional malt houses were mainly replaced by more automated production. A music hall has been made of many former malt houses, including Snape Maltings in England.
Approximately 60% of the primary energy consumed by the malt beverage sector is made up of natural gas and coal (Energy Information Administration (EIA), 1997; National Petroleum Council (NPC), 2003). These fuels are typically utilised as inputs into boilers to provide steam for different processes and for the generation of on-site electricity.
One of the most energy-intensive processes in the malthouse and brewery is the boiling of malt kinling.
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444 joules into calories
Answer:
106.119 calories
Explanation:
Hope this helps! If you need a step-by-step explanation feel free to ask and I'd be happy to give it to you <33
strontium salts are also used in highway safety flares. when an electron from strontium relaxes from its prevalent excited state, a photon with a wavelength of 660 nm is emitted. approximately how much energy is released upon emission?
The energy is released upon emission is E = 1.7 x 10⁵ J/mol.
The formula of energy is
E = hv
Here,
v = c / λ
c = speed of light
= 3 × 10^8
λ = 660 nm
= 660 × 10^-9
v = c / λ
= 3 × 10^8 / 660 × 10^-9
v = 4.5 × 10^14
Value of h = 6.626 x 10^-34 Js
E = hv
E = 6.626 × 10^-34 Js × 4.5 × 10^14
E = 2.9 × 10^-19 J/ photon
The amount of energy we receive is one photon's worth. To find the solution to this question, we must thus multiply this result by Avogadro's number.
E = 2.9 x 10 ⁻¹⁹ J/ photon x 6.022 x 10 ²³photon/mol
E = 1.7 x 10⁵ J/mol
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how is larithmics important to science
Answer:
Probably the most common use is the first-order decay law, which describes everything from radioactive decay to the metabolism of drugs.
Much of the power of logarithms is their usefulness in solving exponential equations. Some examples of this include sound (decibel measures), earthquakes (Richter scale), the brightness of stars, and chemistry (pH balance, a measure of acidity and alkalinity)
Explanation:
examine the following order of elution of compounds containing certain functional groups from fastest to slowest, and indicate which mistake has been made.hydrocarbons, olefins, ethers, amines, ketones, aldehydes, esters, alcohols, aromatics, and carboxylic acids
Elution sequence for chemicals, from the fastest to the slowest is hydrocarbons, olefins, ethers, halocarbons, aromatics, ketones, aldehydes, esters, alcohols, amines and acids.
What is Elution sequence ?
No matter how polar the compounds are, the more polar the solvent, the faster the chemicals elute. Therefore, altering the polarity of the solvent will not alter the order in which the compounds elute off a TLC or column. This may seem counterintuitive because a polar solvent would seem to carry polar compounds farther than nonpolar compounds.
Consider that chemicals and solvents will fight for locations on the stationary phase in order to help you visualize this idea. Slow elution will be caused by molecules remaining attached to the stationary phase due to a less polar solvent's poor ability to compete. Molecules and a polar solvent will successfully contend for locations on the stationary phase.
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select the option that places remaining contributors in the correct order, from highest to lowest according to the percentages of greenhouse gases they emit.
From highest to lowest according to the percentages of greenhouse gases they emit.
Residential and commercial buildings, transportation, agriculture, forestryTransportation, forestry, residential and commercial buildings, agricultureForestry, agriculture, transportation, residential and commercial buildingsAgriculture, transportation, forestry, residential and commercial buildingsWhat are greenhouse gases?
The main greenhouse gases in Earth's atmosphere are water vapour (H2O), carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and ozone. A greenhouse gas (GHG or GhG) is a gas that absorbs and emits radiant energy in the thermal infrared range (O3). Without greenhouse gases, the average surface temperature of the Earth would be closer to 18 °C (0 °F) than it is today, which is 15 °C (59 °F). Additionally, greenhouse gases are found in the atmospheres of Venus, Mars, and Titan.
Thus the correct order goes as:
Forestry, agriculture, transportation, residential and commercial buildings
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What is the iupac name of the following compound?
a. (s)-2-bromo-2-vinylpentane
b. (r)-2-bromo-2-vinylpentane
c. (r)-3-bromo-3-methyl-1-hexene
d. (s)-3-bromo-3-propyl-1-butene
The IUPAC name of the compound is (r)-3-bromo-3-methyl-1-hexene.
Determine the chain's parent. In this instance, the 6-carbon chain begins at the alkene and extends to the right after looping through the chiral center. Hex-1-ene is the result of the prefix "6" and the alkene, which starts at position "1".Substituents. Since they are both at the 3-position in this instance, they will be sorted alphabetically: 3-bromo-3-methylChiral Center at position 3. According to IUPAC guidelines, the bromine atom is represented by the number 1, the carbon atom double-bonded to the following carbon atom by the number 2, the carbon atom single-bound to the following carbon atom by the number 3, and the methyl group by the number 4. Imagine a tetrahedron in your thoughts and turn it such that the numbers 1-3 are facing you as you look at the molecule.When put together we get: (3R)-3-bromo-3-methylhex-1-ene.Or (r)-3-bromo-3-methyl-1-hexene.
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A carbon atom has 6 electrons however, its valence is 4. this is because the carbon atom ___.
Since carbon has four valence electrons, it can create four covalent bonds to reach the entire outer energy level.
What are valence electrons?The electrons in an atom's outermost shell, or energy level, are called valence electrons. For instance, the valence electrons of oxygen are six, with two in the 2s subshell and four in the 2p subshell.
For neutral atoms, the number of valence electrons is equal to the number of the atom's primary group. The main group number of an element in the periodic table can be found by looking at its column. For instance, the group 4 member carbon contains four valence electrons. Oxygen, a group six member, has six valence electrons.
Chlorine, fluorine, iodine, and astatine are members of the halogen family of elements, which are those containing seven electrons in the valence shell.
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The average atomic mass of silver is 107.8682 amu. the fractional abundance of the lighter of the two isotopes is ________.
The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is 0.5185.
The metal has always been in perfect plenty. Both heavier and lighter particles have a combined abundance of 1.
Assume that a is the heavier particle's abundance.
The lighter particle will have an abundance of = 1-a.
Calculations for the element's atomic mass with isotopes go like this:
Average atomic mass equals the sum of the abundance of isotope 1 and isotope 2 masses.
107.8682 amu is the specified average atomic mass.
Lighter isotope 1 has a mass of 106.90509 amu.
The heavier isotope has a mass of 108.9047 amu.
putting the values :
107.8682 = 106.90509 (1 - a) + 108.9047a
107.8682 = 106.90509 - 106.90509a + 108.9047a
107.8682 - 106.90509 = 1.99961a
0.96311 = 1.99961a
a = 0.48
Thus, 0.48 is the heavier particle abundance.
Lighter particle abundance = 1 - a
The density of lighter particles is equal to 1 - 0.48.
Lighter particle abundance = 0.518
The lighter particle has a percent abundance of 51.8%.
The lighter of the two isotopes has a fractional abundance of 0.5185.
Question:
Silver has two naturally occurring isotopes with the following isotopic masses: 10747Ag 10947Ag 106.90509 108.9047 The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is ________. Silver has two naturally occurring isotopes with the following isotopic masses: Ag Ag 106.90509 108.9047 The average atomic mass of silver is 107.8682 amu. The fractional abundance of the lighter of the two isotopes is ________. 0.24221 0.48168 0.75783 0.90474 0.51835
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A+0.400+m+acid+solution,+ha(aq),+has+a+percent+ionization+of+7.50%.+what+is+the+value+of+ka,+the+acid+ionization+constant+of+ha(aq)?
The value of Ka is 2.25 × 10⁻³.
What is ionization constant?A dissociation constant is a particular kind of equilibrium constant used in chemistry, biochemistry, and pharmacology to measure an object's propensity to break down into its component parts, such as when a complex disintegrates into its component molecules or a salt disintegrates into its component ions.
K is a constant that depends on the equilibrium between ions and non-ionized molecules in a solution or liquid. – also known as the dissociation constant.
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when acidified k2cr2o7 solution is added to na2s solution, green cr3 ions and free s are formed. when acidified k2cr2o7 solution is added to nacl, no change occurs. of the substances involved in these reactions, which is the best reducing agent?
The best reducing agent is Na2S.
What is reducing agent?A chemical species known as a reducing agent in chemistry "donates" an electron to an electron acceptor. The Earth metals, formic acid, oxalic acid, and sulfite compounds are a few examples of chemicals that are frequently used as reducing agents.
A material that induces oxidation by receiving electrons becomes reduced when it acts as an oxidising agent. A chemical that reduces something by gaining electrons is said to be an oxidising agent. There are examples of how to recognise oxidising and reducing agents.
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Change the following values to ordinary numbers. a 5.5×10−6 b 2.9×102 c 1.115×104 d 1.412×10−3 e 7.2×101
The following value to the ordinary numbers:
a - 5.5 × 10⁻⁶ = 0.0000055
b - 2.9 ×10² = 2900
c - 1.115 × 10⁴ = 11150
d - 1.412 × 10⁻³ = 0.001412
e - 7.2 × 10¹ = 72
How do you convert to ordinary numbers?To convert standard form numbers to regular form: Give a regular number a power of 10. It is necessary to multiply the decimal number by this power of 10. You should type your number like a regular number.
What are decimals number?A decimal is one of the number types in mathematics that has a fractional component and a complete integer split by a decimal point. The point that appears between the components of a whole integer and a fraction is known as the decimal point. 34.5 is an example of a decimal number.
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58
The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the
pressure of the gas?
O It decreases by a factor of four.
O It increases by a factor of four.
O It decreases by a factor of eight.
O It increases by a factor of eight.
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The pressure of gas will increase by a factor of 4.
When absolute temperature of a gas is increased 4 times while maintaining constant volume, The pressure of the gas is increased by a factor of 4.
This can be explained by Gay-Lussac Law, which states that at any constant volume, the pressure of the gas will be directly proportional to the temperature for a given gas.
PV=nRT ,
Gay-Lussac law explains the relationship between temperature and pressure at constant volume.
P ∝ T => P1 / T1 = P2 / T2
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a sheet of aluminum (al) foil has a total area of 1.000 ft2 and a mass of 3.736 g. what is the thickness of the foil in millimeters (density of al
The thickness of a sheet of aluminum (al) foil is t = 0.015 mm.
What is density ?The definition of density is the mass of a material per unit of volume. The Latin letter D may also be used, however the sign is most usually employed to denote density. The mathematical definition of density is mass divided by volume.
row = m/V
where is the density, m is the mass, and V is the volume.
The connection between a substance's mass and the amount of space it occupies is known as its density (volume). The density of a substance is determined by the mass, size, and arrangement of its atoms. Density (D) is defined as the product of a substance's mass and volume.
V = mass/ Density
V = 3.736/2.699
V = 1.3842 cm³
area = 1.00 ft²
as we know,
1ft = (0.305m)²
= 0.093m²
= 0.093 * 10⁶ mm²
so, the thickness will be,
t = 1384.2/ 0.093 * 10⁶ mm²
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For what order reaction does the half-life get longer as the initial concentration increases?
The half-life gets longer as the initial concentration increases in zero-order reaction.
The amount of time it takes for the concentration of a given reactant to reach 50% of its initial concentration is known as the half-life of a chemical reaction (i.e. the time taken for the reactant concentration to reach half of its initial value).
For zero order reaction:
The half-life is given as:
[tex]t_{1/2}=\frac{[A]_{0}}{2k}[/tex] where k is the rate constant of the reaction and [tex][A]_{0}[/tex] is the initial concentration.
As we can see that the half-life is directly proportional to the initial concentration. Therefore, when the initial concentration increases the half-life gets longer.
For the first-order reaction,
The half-life is given as:
[tex]t_{1/2}=\frac{\ln 2}{k}=\frac{0.693}{k}[/tex]
A first-order reaction's half-life is independent of the initial concentration.
For a second-order reaction,
The half-life is:
[tex]t_{\frac{1}{2} }=\frac{1}{k[A]_{0}}[/tex]
The initial concentration is inversely proportional to the half-life, so when the initial concentration increases the half-life will get shorter.
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onsider the structure. a carbon is bonded to two three carbon chains and a branched alkane. the branched alkane is a 2 carbon chain with a methyl on carbon 1. select the correct name for the given structure.
If we consider a structure in which a carbon is bonded to two three carbon chains and a branched alkane then the branched alkane is a 2 carbon chain with a ethyl on Carbon 1 then the correct name of the structure is 4-(isopropyl)heptane.
The two three carbon chains bonded to the carbon atom will form the parent chain of this structure and this chain will have 7 carbon atoms in it.
Since this chain is that of an alkane and it has no functional group attached so the root name will be heptane.
Now, we have to add a prefix by naming the branched alkyl chain. The branched chain has 3 carbon atoms in it with a methyl group on carbon 1.
So, this name of this group will be propyl.
The position of this propyl group is 4th on the parent chain so the full name of the structure will be 4-(isopropyl)heptane.
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How much heat is absorbed when of C(s) reacts in
the presence of to produce CS2(1) and CO(g)
according to the following chemical equation?
5 C(s) + 2 SO₂(g) → CS₂(1) +4 0(g) AH = 239.9 kJ
120 KJ of heat is absorbed in this reaction.
As we know
Where W is the provided mass of carbon, which is 30g, n=W/M
M is the carbon molar mass. 30 / 12 = 2.5 moles at 12g/mol.
As a result, the heat absorbed by 2.5 moles of carbon is equal to 120 kJ, or half the heat absorbed by 5 moles of carbon, or 239.9 kJ.
The heat evolved (either emitted or absorbed) during a process that runs at constant pressure is equivalent to the change in enthalpy. The internal energy (U) and pressure-volume product (PV), are both supplied by the equation:
H=U+PV
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The ph of a 0.10 m monoprotic acid ha is measured to be 3.5. what is the ka value of this acid?
The ph of a 0.10 m monoprotic acid ha is measured to be 3.5. The ka value of this acid is 10^(-6).
What is pH?
The hydrogen ion concentration is measured using the pH scale. The pH values, which range from 0 to 14, are assigned to it. Therefore, we may say that the pH value is a number that represents how acidic or basic a solution is.
A solution with a pH below 7 is referred to as acidic, and one with a pH over 7 is referred to as basic, or alkaline.
HA⇌H+ + A−
ka= [H +][A −]/[HA]
For weak acids, [H+] = [A-]
[H+] = 10^(-pH)
Thus, Ka = {10^(-3.5)}^2/0.10 = 10^(-6)
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What is the product of the following reaction?
(a) cyclohexane
(b) cyclohexene
(c) cyclohexanol
(d) 1,2-cyclohexanediol
The correct option is cyclohexane.
What is cyclohexane used for?The majority of cyclohexane is used to make nylon intermediates, which are used to make thermoplastics and a variety of popular items including apparel, tents, and carpets. Additionally employed as a solvent in industrial and chemical processes, cyclohexane has recently replaced benzene in several applications.Remove the person from the exposure if they experience irritation and burns, as well as burns on their nose and throat that cause them to cough and wheeze. Eyes should be thoroughly rinsed with water for at least 15 minutes. If wearing contacts, take them out. Look for medical help.The main distinction between cyclohexane and benzene is that the former has six carbon atoms and two hydrogen atoms bonded to each of its six carbon atoms, whereas the latter has six hydrogen atoms bonded to each of its six carbon atoms.
What is the product of the following reaction? Cyclohexane.
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What is the net ionic equation for
the reaction below?
MnS(s) + H₂SO4 (aq) → MnSO4 (aq) + H₂S(g)
The net ionic equation is: 2H⁺(aq) + S²⁻(aq) → H₂S(g)
What is a net ionic equation?A net ionic equation is an ionic equation which does not indicate the ions which remains in the solution as ions at the end of the reaction but only the ions which form the products are shown in a net ionic equation.
The ions that remain in solution are known as spectator ions.
The ionic equation of the given reaction is given below:
Mn²⁺S²⁻(aq) + 2H⁺SO₄²⁻ (aq) → Mn²⁺SO₄²⁻ (aq) + H₂S(g)
The net ionic equation is: 2H⁺(aq) + S²⁻(aq) → H₂S(g)
In conclusion, a net ionic equation only shows ions that form products.
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you have been observing an insect that defends itself from enemies by secreting a caustic liquid. analysis of the liquid shows it to have a total concentration of formate plus formic acid (Ka
pH of the buffer solution is 1.76.
Chemical dissociation of formic acid in the water:
HCOOH(aq) ⇄ HCOO⁻(aq) + H⁺(aq)
The solution of formic acid and formate ions is a buffer.
[HCOO⁻] = 0.015 M; equilibrium concentration of formate ions
[HCOOH] + [HCOO⁻] = 1.45 M; sum of concentration of formic acid and formate
[HCOOH] = 1.45 M - 0.015 M
[HCOOH] = 1.435 M; equilibrium concentration of formic acid
pKa = -logKa
pKa = -log 1.8×10⁻⁴ M
pKa = 3.74
Henderson–Hasselbalch equation: pH = pKa + log(cs/ck)
pH = 3.74 + log (0.015 M/1.435 M)
pH = 3.74 - 1.98
pH = 1.76
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a solution of toluene (c₇h₈) in 301 g of cyclohexane (c₆h₁₂) has a boiling point of 90.30 °c. what quantity in moles of toluene are in the solution? (for cyclohexane kb
There are 0.96 moles of toluene are in the solution of toluene (C₇H₈) in 301 g of cyclohexane (C₆H₁₂) having a boiling point of 90.30°C.
Given data -
Boiling point of cyclohexane = 90.30°C
Mass of cyclohexane = 301 g
Kb of cyclohexane = 2.92°C/m
Tb of cyclohexane = 80.90°C
Using the equation,
m = ∆Tb
Kb
where,
m is molality of the solution,
∆Tb is the change in boiling point of cyclohexane -
90.30 ° C - 80.90 °C = 9.40 °C
Kb is the boiling point elevation constant of cyclohexane, 2.92 °C/m
Molality (m) = 9.40 = 3.22 mol/kg
2.92
Number of moles of toluene = molality x mass of cyclohexane (in kg)
= 3.22 x 301
1000
Number of moles of toluene = 0.96 mol
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the resultant pressure force acting on a body completely or partially submerged in a liquid is the ______________________________.
The resultant pressure force acting on a body completely or partially submerged in a liquid is the
When a body is completely or partially submerged in a liquid, the resultant pressure force acting on the body is called the buoyant force.
What is buoyant force?A fluid's uoyancy, also known as an upthrust, is an upward force that works against the weight of an item that is partially or completely submerged in the fluid. Because of the weight of the fluid on top, pressure in a fluid column rises with depth.
Accordingly, a fluid column's bottom has a higher pressure than its top. Similar to this, when an object is submerged in a liquid, the pressure at the bottom of the object is higher than at the top. The net force on the object is upward due to the pressure difference. According to Archimedes' principle, the force's strength is proportional to the difference in pressure and is equal to the weight of the fluid that would otherwise occupy the space.
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