Perform the following operation. 2300 ml + 3.5 L The total is L or ml.
Answer:
5.8 L
Explanation:
To add milliliters to liters, you'd need to either convert the milliliters to liters or the liters to milliliters.
If you were to convert the milliliters to liters, you can divide 2300 by 1000 because "milli" means 1/1000. This gives you 2.3 L.
You can then add 2.3 L to 3.5 L to give you 5.8 L total.
4 C₂H5Cl + 13 O₂ => 8 CO₂ + 10 H₂O + 2 Cl₂
How many moles of CO₂ will be produced,
if 420 grams of Cla are produced?
1.5 moles CO₂
6 moles CO₂
24 moles CO2
A gaseous mixture contains He that exerts a pressure of 2 atm, Ne that exerts a pressure of
1.25 atm, and Ar that exerts a pressure of 1.5 atm. At constant temperature What is the
total pressure of the gas mixture?
4.75 atm
1.50 atm
Not enough information
3.00 atm
How many grams of Na₂SO₄ are needed to completely precipitate the Ba²⁺ ions as BaSO₄ from 150 mL solution of 0.150 M BaCl₂ according to the balanced chemical reaction:
Na₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2 NaCl(aq)
How do i start? which is my starting point and I need help with the conversion ratios to complete the boxes
3.195 grams of Na₂SO₄ are needed to completely precipitate the Ba²⁺ ions as BaSO₄ from 150 mL solution of 0.150 M BaCl₂.
What is precipitation?Chemical precipitation is the process of changing a liquid into an insoluble form or supersaturating a solution in order to transform it into a solid. When two ionic bonds combine in an aqueous solution, a chemical process known as the precipitation reaction takes place, resulting in the formation of precipitates, an insoluble salt.
The equation becomes:
Na₂SO₄(aq) + BaCl₂(aq) → BaSO₄(s) + 2 NaCl(aq)
1 mole 1 mole 1 mole 2 mole
Given that,
150 mL solution of 0.150 M BaCl₂.
Now, molar mass of Na₂SO₄ = (23×2 + 32 + 16×4) g/mol = 142 g/mol
Mole ratio Na₂SO₄ : BaCl₂ = 1 : 1
Moles of BaCl₂ formed = (0.150 mol/l) × (150/1000 L) = 0.0225 mol
Moles of Na₂SO₄ needed = (0.0225 mol) × (1/1) = 0.0225 mol
Mass of Na₂SO₄ needed = (0.0225 mol) × (142 g/mol) = 3.195 gm.
So, 3.195 grams of Na₂SO₄ are needed
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When Wavelength is 4.75 x 10-9 what is the frequency of the wave?
3.14x10-25
1.58 x 10-17
6.74x1016
Answer: 1.58 x 10-17
The frequency of a wave is inversely proportional to its wavelength, meaning that as the wavelength increases, the frequency decreases and vice versa. We can use the following formula to calculate the frequency of a wave given its wavelength:
Frequency = Speed of light / Wavelength
Plugging in the values from the question, we get:
Frequency = 3 x 10^8 m/s / (4.75 x 10^-9 m)
= 1.58 x 10^-17 Hz
Therefore, the frequency of the wave is 1.58 x 10^-17 Hz.
C3H8 + O2 = CO2 + H2O
In the unbalanced chemical reaction for the combustion of propane, if 5.3 moles of carbon dioxide is produced, how many moles of oxygen reacted?
Answer:
if 5.3 moles of carbon dioxide is produced in the combustion of propane, 1.77 moles of oxygen would have reacted in the reaction.
Explanation:
To determine the number of moles of oxygen that reacted in the combustion of propane, you can use the balanced chemical equation for the reaction:
C3H8 + 5 O2 -> 3 CO2 + 4 H2O
In this equation, one mole of propane reacts with five moles of oxygen to produce three moles of carbon dioxide and four moles of water. If you know the number of moles of carbon dioxide produced in the reaction, you can use the balanced equation to determine the number of moles of oxygen that reacted.
For example, if 5.3 moles of carbon dioxide is produced in the reaction, you can use the balanced equation to determine the number of moles of oxygen that reacted:
5.3 moles CO2 / 3 moles CO2/mole O2 = 1.77 moles O2
Can I have little help please
Answer:
what do you need help with
ANSWERED. !!!!!!!!!!!!!!!!
Answer:
:)
Explanation:
Using the illustration to help, place these intermediates in the assimilatory nitrate reduction pathway in their proper space.
1. Nitrate 2. Nitrite 3. Nitroxyl 4. Hydroxylamine 5. Ammonia.
Assimilatory nitrate reduction: what happens?Nitrate is converted to nitrite via the assimilatory pathway, which is then further converted to ammonia—a source of nitrogen for biosynthesis—by assimilatory nitrite reductase.The dissimilatory route also converts nitrate to nitrite from nitrate.
What distinguishes assimilatory nitrate reduction from dissimilatory nitrate reduction?Dissimilatory & assimilatory nitrate reductases are thus genetically different in P. aeruginosa.To stop nitrate-based slow dissimilatory development, both enzymes must be lost.Both dissimilatory and assimilatory nitrate reductases need molybdenum to work properly.
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student added 2 ml 2 ml of 0.1 m c a c l 2 0.1 m cacl2 to 2 ml 2 ml of 0.1 m n a 2 c o 3 0.1 m na2co3 in a test tube. he observed a white precipitate form. which of the following is the identity of the precipitate?
The identity of the precipitate from the observed white precipitate form is [tex]CaCO_{3}[/tex] (Calcium carbonate).
What is the identity of the precipitate?А precipitаte is а solid formed in а chemicаl reаction thаt is different from either of the reаctаnts. This cаn occur when solutions contаining ionic compounds аre mixed аnd аn insoluble product is formed. The identity of the precipitаte cаn often be determined by exаmining solubility rules. It аlso occurs in single displаcement when one metаl ion in solution is replаced by аnother metаl ion. Notice the new solid forming on the bottom of the tube.
Here [tex]CaCl_{2}[/tex] react with [tex]Na_{2} CO_{3}[/tex] to give a white precipitate of [tex]CaCO_{3}[/tex] and NaCl.
[tex]CaCl_{2}[/tex] + [tex]Na_{2} CO_{3}[/tex] → [tex]CaCO_{3}[/tex] + 2NaCl.
Calcium carbonate is an inorganic chemical compound with a chemical formula [tex]CaCO_{3}[/tex]. Cаlcium cаrbonаte is а non-toxic аnd odourless compound commonly found аs а white minerаl which occurs nаturаlly in chаlks, limestones аnd mаrbles.
Your question is incomplete, but your full question can see in the attachment.
Thus, the correct option is D.
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6 CO2 + 6 H2O + light equation C6H12O6 + 6 O2
If there were 2.38 x 102 g of H2O, 18.6 moles of CO2, and plenty of light, what would be the theoretical yield of the reaction?
6 moles of carbon dioxide produces 1 mole of glucose in this reaction. Thus, 18.6 moles produces 3.1 moles or 558 g of glucose.
What is photosynthesis?Photosynthesis is the biological reaction of water with carbon dioxide in presence of light to give glucose an oxygen gas. Photosynthetic reaction takes place in green plants to synthesis energy.
As per the balanced equation of the reaction, 6 moles of water combines with 6 moles of carbon dioxide to produce 1 mole of glucose. Here water is taken in excess and carbon dioxide is 18.6 moles.
The number of moles of glucose produced from 18.6 moles of carbon dioxide = (18.6 ×1)/3 = 3.1 moles.
Molar mass of glucose = 180 g/mol.
3 moles of glucose = 180 × 3.1 = 558 g.
Therefore, the theoretical yield of the photosynthetic reaction with 18.6 moles of carbon dioxide is 558 g of glucose.
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classify each reaction as spontaneous or nonspontaneous. drag the appropriate items to their respective bins. view available hint(s)
A reaction is said to as "spontaneous" if it happens in conditions that encourage the production of products.When the standard change in free energy is positive and energy is absorbed, a chemical reaction is referred to be an endergonic reaction (also known as a nonspontaneous reaction).
The two categories of chemical reactions that can take place in the environment are spontaneous and nonspontaneous reactions. When a certain set of circumstances are present, spontaneous reactions happen on their own. For the non-spontaneous processes to continue, energy must be given.Accordingly, exergonic describes spontaneous responses whereas endergonic describes non-spontaneous reactions. The primary distinction between spontaneous and nonspontaneous reactions is the release of free energy from the system, which increases stability, as opposed to nonspontaneous reactions, which increase the system's overall energy.
complete question:Classify each solid as a covalent; ionic, metallic, or molecular solid. Drag the appropriate items to their respective bins: View Available Hint(s) Reset Help pure calcium, red phosphorus ,sugar ,calcium fluoride-Covalent, lonic, Metallic, Molecular.
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The table below shows the dimensions of two colored cubes.
Dimensions of Cubes
Cube Side (cm) Mass
(g)
Blue 5 250
White 4 320
Which cube is denser?
Blue, because the ratio of its mass and side is higher.
White, because the ratio of its mass and side is lower.
Blue, because it has more volume and less amount of matter.
White, because it has less volume, but a lot more matter.
The white is denser because it has less volume, but a lot more matter. Option 4.
What is denisty?The density of a substance is the ratio of its mass and its volume. This can be mathematically expressed as:
Density = mass/volume.
For the cube with 5 cm sides and 250 g mass, the density can be derived by first calculating the volume as follows:
Volume = 5 x 5 x 5
= 125 [tex]cm^3[/tex]
Its density can be calculated as:
Density = 250/125
= 2 g/[tex]cm^3[/tex]
For the cube with a mass of 320 g and 4 cm sides, the volume and density can be calculated as follows:
volume = 4 x 4 x 4
= 64 [tex]cm^3[/tex]
Its density can then be calculated as:
Density = 320/64
= 5 g/[tex]cm^3[/tex]
Thus, the white cube is denser because it has a higher density by having less volume but more matter (mass).
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Charles Goodyear was a scientist who was looking for ways to keep rubber from melting in the summer heat and becoming brittle in the winter cold.
He discovered the solution by accident when someone left a sample of rubber and sulfur on the stove.
Was this a scientific discovery?
He discovered the solution by accident when someone left a sample of rubber and sulfur on the stove which makes it a scientific discovery because he used observations and empirical evidence and is therefore denoted as option D.
What is Scientific discovery?This is referred to as the process or product of successful scientific inquiry and is depicted by the events, processes and methods involved.
We were told that he discovered the solution by accident when someone left a sample of rubber and sulfur on the stove in which observations and empirical evidence were used which is a characteristic of a scientific discovery.
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The options are:
A.Yes. Goodyear was a scientist, so his discovery was scientific.
B.No. Goodyear failed to develop a hypothesis about the method.
C.No. Goodyear did not follow the scientific method.
D.Yes. Goodyear used observations and empirical evidence.
Farmers depend on a growing season to provide for their families. A growing season is the part of the year when rainfall and amount of sunlight allow plants to growth at a rapid rate. For many plants, especially crops that humans consume, the growing season occurs in the spring after the last frost and can last through the summer. You are to provide support for proving that additional sunlight during the growing season provides an increase in growth for plants.
First, your teacher asks you to demonstrate the relationship between sunlight entering the plant cell and increased growth. How do two organelles in the plant cell work together so the plant can grow? Use the following flowchart to show this relationship. Drag the correct terms from the bank to fill in the blanks.
What traits were you trying to control in the cattle is the most reasonable question.
What is agriculturist?a person who cultivates the and the land and grows to the crops on it agriculturists who adhere to their magnetic organization's standards of organic product is a good farming.
An agriculturist, agriculturalist, agrologist, or the agronomist, is a professional in the science, se can say them farmers alsopractice, and the management of agriculture and technology and agribusiness. It is a type of regulated profession in the Canada, India, the Philippines, the United and States, and the European Union.
Robert Bakewell is an it's agriculturist that revolutionized sheep and to the cattle breeding in England. He inherited his radiation father's farm and the he innovated brreding of the techniques. He separated his male and to the female livestocks to prevent random breeding. He further advanced a method method that tells desirable traits were exaggerated by inbreeding by the and undesirable traits were removed from the the breeding population.
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When 116.0 mL of water at 26.0°C is mixed with 71.0 mL of water at 85.0°C, what is the final temperature? (Assume that no heat is lost to the surroundings; d of water is 1.00 g/mL.)
The final temperature is calculated to be 48.40°C.
What is specific heat capacity?The specific heat capacity is measured in J/(kg K) or J/(kg °C), and it is the amount of heat (J) absorbed per unit mass (kg) of the material when its temperature rises by 1 K (or 1 °C).
Calculating the mass of the 116.0 mL of water:
Given,
Mass (m)= ?
Volume (V)= 116.0 mL
Density = 1.00 g/ml
Now,
Mass = Density × Volume
= 1.00 × 116.0
= 116.0 g
So, mass of the 116.0 mL of water is 116.0 g
Given,
Initial temperature (T₁) = 26.0°C
The final temperature of the water = T₂
Hence,
The change in the temperature can be calculated by,
ΔT = T₂ - T₁
Let the heat absorbed by 116.0 g of water = Q
Hence, The formula to calculate heat absorbed is,
Q = m × c × ΔT
Now,
Calculating the mass of the 71.0 mL of water:
Given,
Mass (m')= ?
Volume (V')= 71.0 mL
Density = 1.00 g/ml
Now,
Mass = Density × Volume
= 1.00 × 71.0
= 71.0 g
So, mass of the 116.0 mL of water is 71.0 g
Given,
Initial temperature (T'₁) = 26.0°C
The final temperature of the water = T'₂
Hence,
The change in the temperature can be calculated by,
ΔT' = T'₂ - T'₁
Let the heat absorbed by 116.0 g of water = Q'
Hence, The formula to calculate heat absorbed is,
Q' = m' × c × ΔT'
Both the liquids are mixed and the final temperature will be equivalent and given as, ΔT₂ = ΔT'₂
According to the law of conservation,
Heat lost by the water (Q') = Heat absorbed by the water (-Q)
m × c × ΔT = m' × c × ΔT'
116 × c(T₂ - 26) = -71 × c(T₂ - 85)
T₂ = 48.40
Hence, 48.40°C is the final temperature.
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When 116.0 mL of water at 26.0°C is mixed with 71.0 mL of water at 85.0°C, the final temperature is 48.40°C.
(m)= ?
(V)= 116.0 mL
Density is 1 g/ml.
T initial (T1) = 26.0 °C
T final = T2
Mass = Density * Volume
= 1.00 116.0
= 116.0 g
T = T2 - T1;
Water absorbing 116.0 g of heat equals Q
Q = m c T.
Calculating the mass of the 71.0 mL of water:
(m')= ?
(V')= 71.0 mL
The mass of the 116.0 mL of water is 71.0 g and the density is 1.00 g/ml
(1.00 * 71.0 = 71.0 g).
The starting temperature (T'1) is 26.0 °C.
T final = T'2
Heat absorbed by 116.0 g of water equals Q'
Q' = m' c T', where
T' = T'2 - T'1.
The end temperature will be the same for both, ΔT₂ = ΔT'₂
The law of conservation states that heat transferred by the water (Q') equals heat absorbed by the water (-Q)
m c ΔT = m' c ΔT'
116 × c(T₂ - 26) = -71 × c(T₂ - 85)
T₂ = 48.40
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rue or False: When cleaning the end of a piece of copper tube for making a soldered joint, it should be cleaned for a distance slightly more than twice the distance required to enter the socket of the fitting.false (1/4" more than the insertion depth)
When cleaning the end of a piece of copper tube for making a soldered joint, it should be cleaned for a distance slightly more than twice the distance required to enter the socket of the fitting is false.
The given statement is not true that When cleaning the end of a piece of copper tube for making a soldered joint, it should be cleaned for a distance slightly more than twice the distance required to enter the socket of the fitting. The 1/4 more than the insertion depth. The end of the tube can be cleaned by using the sand cloth or the nylon cloth it should be cleaned for distance only slightly more than the depth of the fitting socket.
Thus, the copper tube can be cleaned by using the sand cloth.
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TO EARN FULL CREDIT YOU MUST SHOW ALL WORK!
For each item below determine the name, find it's molar mass, and it's percent composition
Answer:
Ag2CrO4
silver chromate, 331.966 g/mol
Ag=65%, Cr=15% O=19%
CH4
Methane, 16 g/mol
C=75% H=25%
Ca3(PO4)2
calcium Phosphate, 310 g/mol
Ca=38.7% P=20% O=41.3%
C7H5N3O6
227 g/mol
C=37% H=2.2% N=18.5% O=42.3%
K2C6H5O7
BAIDAR citron, 267 g/mol
CoCl2
Cobalt (ll) Chloride, 129.93
Explanation:
[tex]molar \: mass = m \div n \\ (m = mass \: of \: a \: substance \: in \: gram \: ) \\( n = no. \: of \: moles)[/tex]
Ag2CrO4
Ag=108, Cr=51.996, O=16
[tex]m = \frac{108 \times 2 + 51.996 + 16 \times 4}{1} \\ = 331.966[/tex]
Ag percentage in Ag2CrO4
[(108x2)/331.966]x100
=65%
Cr percentage in Ag2CrO4
[51.966/331.966]x100
=15%
O percentage in Ag2CrO4
[(16x4)/331.966]x100
=19%
CH4
C=12 H=1
12+1x4=16 g/mol
C percentage in CH4
(12/16)x100
75%
H percentage in CH4
(4/16)x100
25%
Ca3(PO4)2
Ca=40 P=31 O=16
40x3+31x2+16x8
=310 g/mol
Ca % in Ca3(PO4)2
[(40x3) /310]x100
38.7%
P % in Ca3(PO4)2
[(31x2)/310]x100
20%
O % in Ca3(PO4)2
[(16x8)/310]x100
41.3%
C7H5N3O6
C=12 H=1 N=14 O=16
12x7+1x5+14x3+16x6
227 g/mol
C % in C7H5N3O6
[(12x7)/227]x100
37%
H % in C7H5N3O6
[(1x5)/227]x100
2.2%
N % in C7H5N3O6
[(14x3)/227]x100
18.5%
O % in C7H5N3O6
[(16x6)/227]
42.3%
Do the same for BAIDAR cirton and Cobalt (||) Chloride percentage composition = [(mass of the elements x no. of elements) /molar mass of the molecule]x 100please add this on brainleist it took me long time to write
using valence bond theory draw the molecular orbitals that bonds C to N in HCN
The molecular orbitals of the cyanide ion in HCN is shown in the image attached.
What is the molecular orbital?The molecular orbital is formed from the combination of the atomic orbitals. In this case we can see that there are individual atoms that compose the carbon and the nitrogen atoms of the cyanide. The combination of these atomic orbitals gives the molecular orbitals in the cyanide.
Thus we have the ionic bond that exists between the hydrogen ion and the cyanide and then the covalent bond that we can see by the combination of the atomic orbitals.
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Please select the most appropriate answer for the blank: Entropy change is defined only along the path of a(n) _____ process path. A. Reversible B. Irreversible
C. Externally reversible D. Internally reversible
Internal reversibility, Therefore, during reversible operations, the universe's entropy changes nothing. We can see that for a reversible, adiabatic operation, the change in a system's entropy is zero.
Is entropy a variable in PATH?dS=dQT=0 holds because any reversible process may be characterized as the sum of numerous infinitesimally small Carnot cycles. As a result, the entropy S is a state variable and the integral is independent of the path it takes. In strictly speaking, such route independence is only true for reversible processes.
Does entropy result from reversible processes?This procedure could proceed way without breaking the second law. Reversible processes are those of the latter type. A reversible process' main characteristic internal reversibility, Therefore, during reversible operations, the universe's entropy changes nothing. We can see that for a reversible, adiabatic operation, the change in a system's entropy is zero.
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What are the values of δs for the water, the surroundings, and the universe for the evaporation of water from an open pan at 25°c?.
The values of Δs for the water, the surroundings, and the universe for the evaporation of water from an open pan at 25°c is Positive, Negative, Positive.
What is spontaneous process?
A spontaneous process in thermodynamics is one that happens without the system receiving any outside input.
According to the second law, a spontaneous process,
ΔS[tex]universe > 0[/tex]
As it transitions from a liquid to a gaseous form, water. Entropy changes in favor whenever a phase transition occurs from a liquid to a gas,
So ΔS [tex]water > 0[/tex]
The amount of thermal energy required to cause water to evaporate is determined by multiplying the molar enthalpy of vaporization by the amount of evaporating water in moles. The surrounding provides this thermal energy,
So Δq [tex]surroundings < 0[/tex].
We know that: As long as this thermal energy is transferred reversibly,
[tex]Delta S surr = Delta q surr/T[/tex]
T is always positive since it is being measured in kelvins, which is the thermodynamic scale. The fact that
[tex]Delta q surr < 0 so Delta S surr < 0.[/tex]
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A balloon is filled to a volume of 1.50 L with 2.50 moles of gas at 25 °C. With pressure and temperature held constant, what will be the volume of the balloon if 0.65 moles of gas are released?
The volume of the balloon if 0.65 moles of gas are released is 1.2 L.
What is the fundamental composition of mole?There are 6,022 x 1023 units in a mole of a substance. The Avogadro number or Avogadro constant is the number 6.022 x 1023. The mole definition can be applied for the conversion of mass and particle count.
We are given here that the volume ( V ) = 1.50 Liters,
the initial moles ( held at 25 °C ) = 2.5 mol,
and the final moles ( n ) = 2.5 - 0.5 = 2.0 mol.
The final mol is calculated given that 0.65mol of gas are released from the prior 2.5 moles of gas.
Volume ( V ) = 1.50 L,
Initial moles ( n ) = 2.5 mol,
Final Volume ( n ) = 2.5 - 0.5 = 2.0 mol
We can determine the ultimate volume by applying the combined gas law.
P₁V₁ / n₁T₁ = P₂V₂ / n₂T₂ - we know that the pressure and temperature are constant, and therefore we can apply the following formula,
V₁ / n₁ = V₂ / n₂ - isolate V₂,
V₂ = V₁ n₂ / n₁
V = 1.50 L× 2.0 mol / 2.5 mol
V = 1.2 L.
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20 POINTS
Determine the mass of hydrogen gas collected in a container if the gas occupies
44.8 L at STP. [ans: 4.04 g]
Answer:4.03
Explanation:
When heated, calcium carbonate, CaCO_3(s), decomposes to calcium oxide, CaCO(s), and carbon dioxide, CO_2. Using relevant data from your book's appendices, calculate the heat evolved or consumed when 15.0 g of calcium carbonate are decomposed.
Heat produced during the decomposition of 15 g of calcium carbonate is calculated to be 26.67 KJ.
What do you understand by reaction enthalpy?The heat evolved or absorbed during a reaction is known as reaction enthalpy and it is negative for exothermic reaction and positive for endothermic reaction.
As we know that heat produced when one mole of calcium carbonate decomposes is 177.8 KJ. Therefore, 15 g or 0.15 moles of calcium carbonate when decomposed will give 26.67 KJ of heat.
As we know, molar mass of calcium carbonate is 100 g.
So, no. of moles in 15 g becomes 15 /100
= 0.15 moles.
So, 100 g of calcium carbonate decompose to produce 177.8 KJ
Heat evolved after decomposition of 0.15 moles is
=0.15 × 177.8 KJ = 26.67 KJ.
Therefore, heat evolved in the decomposition of 15 g of calcium carbonate is found to be 26.67 KJ.
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Give examples of biomolecule that has the following bonds:
alpha 1,4 glycosidic Bond alpha 1,6 glycosidic Bond beta 1,4 glycosidic Bond beta 1,6 glycosidic Bond.
Amylopectin is the branched version of starch, it has both of alpha 1,4 glycosidic bond and alpha 1,6 glycosidic bond.
Cellulose has beta 1,4 glycosidic bond.
Terminal saccharide has beta-1,6 glycosidic bond.
What is biomolecules?A biomolecule, often known as a biological molecule, is any of the various compounds created by cells and living creatures. Biomolecules come in a variety of sizes and shapes, and they serve a wide range of functions. Carbohydrates, lipids, proteins, and nucleic acids are the four main categories of biomolecules.
Biomolecules are essential for life because they help organisms develop, survive, and reproduce. They interact with one another to produce creatures ranging from single cells to sophisticated living entities such as humans. They may perform a variety of roles due to the diversity in their shape and structure.
alpha 1,4 glycosidic bond and alpha 1,6 glycosidic bond - Amylopectin
beta 1,4 glycosidic bond - Cellulose.
beta 1,6 glycosidic bond - Terminal saccharide
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The effective nuclear charge, Zeff, experienced by valence electrons in an atom can be estimated from the equation:
Zeff = the number of protons – the number of core electrons
Using this estimation, effective nuclear charge for Main Group elements would ___ left to right across a period.
Which option correctly completes the blank in the statement?
A. increase
B. decrease
C. remain the same
Effective nuclear charge for Main Group elements would increase left to right across a period.
What is the effective nuclear charge?We know that the effective nuclear charge has to do with the force that binds the outer electrons to the protons tat are in the nucleus. We know that the greater the effective nuclear charge, the more difficult it would be to remove an electron from the atom.
Based on this, we could say that since the size of the nuclear charge is increasing across the period, the effective nuclear charge would also be found to increase across the period.
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23 grams of sodium Chloride reacts with oxygen to produce Sodium oxide and how many moles of chlorine?
Question 3 options:
9.14 mol
4.98 mol
.20 mol
.87 mol
Common salt, sometimes referred to as sodium chloride, is a substance consisting of sodium and chlorine atoms. One mole of sodium chloride (23 grams) interacts with one mole of oxygen to produce two moles of sodium oxide and one mole of chlorine. This reaction is known as the sodium chloride–oxygen reaction (NaCl–O2).
How much sodium chloride is in a mole of chlorine?The molar masses of sodium (Na) and chlorine (Cl) are respectively 22.99 g/mole and 35.4 g/mole.
One mole of sodium chloride contains how many moles of sodium?If I take a mole of NaCl, there will either be one mole of Na and zero Cl2 molecules, or two moles of Na and two moles of Cl2 molecules on either side.
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An 12.68 gram ice cube at 0 degrees Celcius is placed in 316.81 grams of liquid water that is initially at 62.39 degrees Celcius. What is the final temperature of the water after the ice melts?
The final temperature of the water after the ice melts, given that the water has an initial temperature of 62.39°C, is 63.06 °C
How do I determine the final temperature?We can obtain the final temperature of the water after the ice melts as follow:
Mass of ice (M) = 12.68 gLatent heat (L) = 334 J/gInitital temperature of ice (Tᵢ) = 0 °CMass of water (Mᵥᵥ) = 316.81 gSpecific heat capacity of water (C) = 4.184 J/g°CTemperature of water (Tᵥᵥ) = 62.39 °CFinal temperature (T) =?Heat of cold = -heat of warm
ML + MC(T – Tᵢ) = -MᵥᵥC(T – Tᵥᵥ)
(12.68 × 334) + [12.68 × 4.184 (T - 0)] = -316.81 × 4.184 (T - 62.39)
4235.12 + 53.05312T = -1325.53304T + 82700.0063656
Collect like terms
53.05312T + 1325.53304T = 82700.0063656 + 4235.12
1378.58616T = 86935.1263656
Divide both sides by 1378.58616
T = 86935.1263656 / 1378.58616
T = 63.06 °C
Thus, from the above calculation, we can conclude that the final temperature is 63.06 °C
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Convert 4.8 x 10-17 nanometers to meters.
The given 4.8 x 10⁻¹⁷ nanometers in meters is equal to 4.8 × 10⁻²⁶ m.
What is a nanometer?The nanometre or nanometer can be described as a unit of length in the International System of Units (SI) and is equal to one billionth (short scale) of a meter (0.000000001 m) and to 1000 picometres. In scientific notation, One nanometre can be expressed as 1×10⁻⁹ m.
Given, the length in nanometers = 4.8 x 10⁻¹⁷ nm
We know that the 1 nm = 1 × 10⁻⁹ m
1 nanometer is equal to meters = 1 × 10⁻⁹ m
4.8 × 10⁻¹⁷ nm will be equivalnet to meters = 4.8 × 10⁻¹⁷ × 10⁻⁹ m
4.8 × 10⁻¹⁷ nm = 4.8 × 10⁻²⁶ m
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use this equation and le chatelier's principle to explain how the addition of 6 m hno3 results in the dissolution of ni(oh)2(s).
Le chatelier's principle addition reactions
The addition of HNO3 moves the equilibrium to the right
so more amount of Ni(OH)2 S will be dissolved
The reaction will be;
Ni(OH)2 + HNO3 ⇔ Ni(NO3)2 + H2O
What is Le chatelier's Principle?A chemistry principle known as Chatelier's principle (or the Equilibrium Law) is used to forecast how a change in circumstances would affect chemical equilibria. The theory is named after the separate discovery by Karl Ferdinand Braun and occasionally French scientist Henry Louis Le Chatelier. It is possible to state:
A simple system in thermodynamic equilibrium shifts to a new equilibrium when a concentration, temperature, volume, or pressure change is applied. This new equilibrium partially cancels out the previous change.
Systems of simultaneous equilibrium can also exhibit phenomena that appear to defy Le Chatelier's principle.
so from this principle;
The addition of HNO3 moves the equilibrium to the right
so more amount of Ni(OH)2 S will be dissolved
The reaction will be;
Ni(OH)2 + HNO3 ⇔ Ni(NO3)2 + H2O
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