Amino acids are categorized by their chemical properties on the basis of the sequence of side chain (R group).
What are amino acids?Amino acids are known as the 'building blocks of the life' as they help in the formation of proteins inside the body.
Side chain of amino acids is specific in nature and are known by the name of R group, these R groups are attached with the alpha carbon atom. R groups characterizes below properties of the molecule:
ShapeSizeCharge andReactivityHence R group describes the chemical properties of amino acids.
To know more about amino acids, visit the below link:
https://brainly.com/question/1302816
#SPJ1
a seashell composed largely of calcium carbonate reacts with a solution of HCl . As a result, 1500 ml of dry co2 gas at stp. How many grams of caco3 are consumed at the reaction
The amount of CaCO₃ that are consumed at the reaction is 6.7 grams.
What is ideal gas equation?Ideal gas equation will be represented PV = nRT from which we can calculate the moles of carbon dioxide, where
P = standard pressure = 1 atmV = standard volume = 1500mL = 1.5LT = standard temperature = 273 KR = universal gas constant = 0.082 L.atm/K.molOn putting all these values, we get
n = (1)(1.5) / (0.082)(273) = 0.0669 moles = 0.067 mol
Given chemical equation is:
CaCO₃ + 2HCl → CO₂ + CaCl₂ + H₂O
From the stoichiometry of the reaction it is clear that,
1 moles of CO₂ = produced by 1 moles of CaCO₃
0.067 moles of CO₂ = produced by 0.067 moles of CaCO₃
Now mass of CaCO₃ will be calculated as:
n = W/M, where
n = moles = 0.067molW = required mass = ?M = molar mass = 100g/molW = (0.067)(100) = 6.7g
Hence required mass of CaCO₃ is 6.7g.
To know more about ideal gas equation, visit the below link:
https://brainly.com/question/24236411
#SPJ1
An elemental gas has a mass of 10. 3g. If the volume is 58. 4 l and the pressure is 758 torr at a tempertaure of 2. 5 c what is the gas
The required elemental gas which has a mass of 10.3 g in the given conditions is helium gas.
How do we calculate molar mass?Relation between the molar mass and moles of any substance will be represented as:
n = W/M, where
W = given massM = molar massMoles of gas will be calculated by using the ideal gas equation:
PV = nRT, where
P = pressure = 758 torrV = volume = 58.4Ln = moles = ?R = universal gas constant = 62.363 L.torr / K.molT = temperature = 25 degree C = 298KOn putting all values, we get moles
n = (758)(58.4) / (62.363)(298) = 44,267.2 / 18,584.2
n = 2.38 moles
Molar mass of the gas will be calculated by using the above first equation is:
M = 10.3g / 2.38mol = 4.32 g/mol = 4g/mol (approx)
Hence given elemental gas is helium.
To know more about molar mass, visit the below link:
https://brainly.com/question/18983376
#SPJ4
PLEASE HELP DUE IN 15!!!!!!! WILL GIVE BRAINLIEST!!
Question 12:
How many grams of NaOH are present in 7.54 moles of NaOH. (The molar mass of NaOH is 39.997 grams/mol)
a. 0.19 grams of NaOH
b. 32.5 grams of NaOH
c. 5.30 grams of NaOH
d. 301.6 grams of NaOH
Chemical bonds are formed when potential energy is when it’s High or Low?
Answer:
high I think
Explanation:
i just did it
Answer:
Bond forms to get stability. Stability will be maximum at low potential energy. So, in bond formation, atoms loose their potential energy to get stabilized and heat is evolved. Generally bond formation is also an exothermic reaction
stoichometry in chemistry!! please someone help i'm begging you, if i fail this then i fail chemistry
Answer:
You can find in the given attachemnet
What current (in a) is required to plate out 1. 22 g of nickel from a solution of ni2 in 0. 50 hour?
The current required to accumulate the 1.22 grams of nickel in 0.5 hours is 2.23 A.
What is current?The current is given as the product of the charge with time. In the electrochemical analysis of the nickel, there will be a reduction of the nickel ion to nickel. The formation is given as:
[tex]\rm Ni^{2+}+2e^-\;\rightleftharpoons Ni[/tex]
There is the deposition of 1 mole of Ni with 2 electrons transfer. The transfer of charge for 1 mole that is 58.7 grams Nickel is:
[tex]\rm 58.7\;g=2\;\times\;96487\;C\\58.7\;g=192974\;C[/tex]
The mass of Ni to be deposited is 1.22 grams. The charge required is given as:
[tex]\rm 58.7\;grams\;Ni=192974\;C\\\\1.22\;grams\;Ni=\dfrac{192974}{58.7}\;\times\;1.22\;C\\\\1.22\;grams\;Ni=4010.7\;C[/tex]
The current required to transfer 4010.7 C of charge in 1800 seconds is given as:
[tex]\rm Charge=Current\;\times\;Time\\4010.7\;C=Current\;\times\;1800\;sec\\Current=2.23\;A[/tex]
Thus, the current required to accumulate the 1.22 grams of nickel in 0.5 hours is 2.23 A.
Learn more about current, here:
https://brainly.com/question/23063355
#SPJ4
under what conditions can calcium bromide conduct electricity
2 NH3 + 3 CuO → 3 Cu + N₂ + 3 H₂O
In the above equation, how many grams of N₂ can be made when 18.4 moles of CuO are consumed?
Answer:
→ 22.9 g of N2.
Explanation:
→ The molar mass of CuO is 63.5 + 16 = 79.5
→ The molar mass of N2 is 2×14 = 28
According to the equation, for every 3 molecules of CuO, one molecule of N2 is made.
Therefore,
3×79.5 g of CuO make 28 grams of N2.
Therefore,
195 g of CuO make
[tex]28×(195/3×79.5) = 22.9 g of N2.[/tex]
In a sample of copper carbonate, how much copper and oxygen would there be for 5 g of carbon?
if you have 4.00 moles of gas at a pressure of 6.35 atm and a temperature of 1973 K, what is the volume
Answer:
101.98 L
Explanation:
Ideal Gas Law PV = n R T R = gas constant = .082057 L-atm/mol-K
6.35 (V) = 4 * .082057 * 1973
V = 101.98 L
What factors have caused the rise in global temperatures over the past century?
Answer:
Explanation:
Global warming is the unusually rapid increase in Earth's average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels.
MULTIPLE CHOICE QUESTION
Which of the following is an example of a
chemical change?
An iron nail forming rust
Tearing paper into many little pieces
Steam coming out from boiling water
Mixing sand with sugar
Dissolving coffee powder in hot water
Answer:
rust
Explanation:
Chemical rxn of iron and oxygen = rust
Potassium carbonate (K2CO3) has one potassium atom bonded to carbon, and that carbon is also bonded to three oxygens. Their electronegativities are shown in the list:
K: 0.82
C: 2.55
O: 3.44
How would you describe the bonds (K–C and C–O) in this molecule?
1: K-C is iconic, and C-O is covalent
2: K-C is iconic, and C-O is nonpolar covalent
3: K-C is polar covalent, and C-O is nonpolar covalent
4: K-C is polar covalent, and C-O is polar covalent
Answer:
Based on the electronegativity difference between them, K-C is ionic, and C-O is polar covalent.
What is a bond?
A bond is formed by the interaction of two atoms. A bond can be either ionic or covalent.
Now we have to look at the electronegatives on each bond. The electronegativity difference between the K-C bond is larger than that between the C-O bond hence, K-C is ionic, and C-O is polar covalent.
Explanation:
Damian places a negatively charged balloon in a magnetic field. Which direction will the balloon move?
1. West to East
2. East to West
3.South to North
4. North to South
Answer:
4.North to south
Explanation:
In magnetic fields, the north pole is considered negative while the south pole is considered positive. Hence the balloon will be attracted from the north towards the south pole since it is negatively charged.
A gas has a volume of 840 mL at -38°C and a pressure of 0.98 atm. If the pressure
changes to 1.37 atm when the gas is heated to 16°C, what is the new volume?
Answer:
X is an element in period 3 with two electrons in the outer shell. Draw a full diagram of the ion form by this element
What does the radical do in a seed of a plant
[tex]\huge{\green}\fcolorbox{blue}{cyan}{\bf{\underline{\red{\color{red}Answer}}}} [/tex]
It is the embryonic root inside the seed. It is the first thing to emerge from a seed and down into the ground to allow the seed to suck up water and send out its leaves so that it can start photosynthesizing. The radicle emerges from a seed through the micropyle.List all of the ions present in solution when the following strong
electrolyte compound is dissolved in water
Co3(PO4)2
Answer:
Co²⁺ and PO₄³⁻
Explanation:
Strong electrolytes completely dissolve in water. Therefore, the ionic bonds between the cation and anion in Co₃(PO₄)₂ would break apart. The resulting ions would be Co²⁺ and PO₄³⁻. The phosphate (PO₄³⁻) would NOT further seperate because the phorphorus and oxygen bonds are covalent, not ionic. Phosphate ions are a type of polyatomic ion (ions which have covalent bonds).
Approximately how long has a victim been dead if their body temperature is 13.5C degrees? 50-52hrs 47-48hrs 33-34hrs 35-36hr
Alkanes contain the maximum possible amount of hydrogen, they are known as being __________. What one word completes the sentence?
Alkanes contain the maximum possible amount of hydrogen, they are known as being saturated hydrocarbon.
What is alkanes?The easiest category of hydrocarbons would be the alkanes. They exclusively possess hydrogen as well as carbon. So every hydrogen atom produces one link, while each carbon atom generates four.
What is hydrocarbon?When all of a hydrocarbon's carbon-carbon bonds possess single bonds, the hydrocarbon was said to have been saturated. A hydrocarbon would be an organic substance with only carbon as well as hydrogen as its components.
Therefore, alkanes contain the maximum possible amount of hydrogen, they are known as being saturated hydrocarbon.
To know more about alkanes and hydrocarbons.
https://brainly.com/question/16995585
#SPJ3
In the bohr model of the hydrogen atom, the radius of the electron orbit increases by a factor of four. What happens to the magnitude of the orbital angular momentum of the electron?
The magnitude of the orbital angular momentum of the electron is doubled when the radius of the electron orbit increases by a factor of four.
What is orbital angular momentum?
The orbital angular momentum is the sum of angular momenta of all electrons, it is the rotational analog of the linear momentum.
The formula of angular momentum
[tex]\rm mvr = \dfrac{nh}{2 \pi}[/tex]
Thus, the magnitude of the orbital angular momentum of the electron is doubled when the radius of the electron orbit increases by a factor of four.
Learn more about orbital angular momentum
https://brainly.com/question/1435774
#SPJ4
If 10 grams of potassium chlorate decompose to form potassium chloride and oxygen gas inside a 500 mL container at a temperature of 45 °C. what will the pressure be inside the container?
Answer:
10 atm
Explanation:
There's a lot to do here, but lets take it one step at a time. First, let's write a balanced equation for the decomposition of potassium chlorate into potassium chloride and oxgyen gas.
2 KClO3 → 2 KCl + 3 O2
Now let's find the moles of the KClO3 (molar mass 122.55 g/mol) that we have take 10 g/122.55 g/mol, grams will cancel and we are left with 0.0816 moles. lets divide that by two since we have a two in front of the KClO3 in the equation, and then multiply that number by 5 since it's the total moles of products, in summary, multiply by 5/2 to get 0.204 moles.
Now that we know the moles of our products, let's plug some stuff into the ideal gas law PV = nRT. We are looking for P so let's solve for that. P = (nRT)/V, now let's plug in our values. Make sure V is converted to liters so 0.5 L. And convert celcius to kelvin by adding 273
P = ((0.204 moles)(318 K)(0.08206 L atm mol^-1 K^-1))/0.5 L
A lot of units cancel, and we get about 10.65 atm, if you don't want the answer in atm, you can find a conversion equation. But let's round to sig figs for now, which will bring us to 10 atm.
In general, the rate of evaporation increases with ___________.
Answer:
heat increase, pressue loss, altitude gain,
Explanation:
The diagram is an example of which of the following..
a) an alkyne
b) an alkane
c) an aldehyde
d) an alkene
Thats an alkane.
Option B.
Answer:
option b) is the answer ..that an alkane
Which type of organism transfers the most energy in a food web?
F. Consumer
G. Producer
H. Decomposer
J. Prey
Answer:
Producers.
Explanation:
Since the source of energy is the sun, the trophic level representing producers contains the most energy.
What is the temperature (in °C) if 12.1 g of N2 in a 1.3 L container has a pressure of 5.8 atm?
Answer:
T=-166.8 C
Explanation:
PM=m/vRT
T=PMV/mR
T=5.8*14*1.3/12.1*0.08206
T=106.3K
=106-273.15=-166.8 C
How to find hydrogen ion concentration from molarity of solution
The concentration of the hydrogen ions from molarity can be given with the number of hydrogen atoms in the molecular formula.
What is molarity?Molarity is given as the moles of the solute present in a liters of solution. The compound with the number of hydrogen atoms in the molecular formula with degradation possesses the equivalent concentration of the hydrogen ions.
The compound with molecular formula AH having molarity 2, will produce 2M of hydrogen ions.
Learn more about molarity, here:
https://brainly.com/question/2817451
#SPJ4
Nuclear fission is the combining of small nuclei into larger ones
Answer:
False.
Explanation:
The combining of the nuclei of atoms is known as nuclear fusion.
The statement that nuclear fission is the combining of small nuclei into larger ones is false.
What is nuclear fission?Nuclear fission is a process in which one nucleus splits into two or more small nuclei. The process release large amount of energy and produce gamma photons.
Opposite to it, Nuclear fusion is a process of combining of small nuclei into larger ones.
Thus, the statement is false, because nuclear fission is a process of splitting of a nucleus.
Learn more about nuclear fission
https://brainly.com/question/913303
#SPJ4
What is the entropy change if one mol of water is warmed from 0 c to 100 c
The entropy change if one mole of water is warmed from 0 degree C to 100 degree C is 1,316.7 J/K.
How do we calculate the entropy change?Change in entropy will be measured by using the below equation as:
ΔS = (n)(Cp)ln(T₂/T₁), where
n = moles of water = 1 mol
Cp = specific heat of water = 4180 J/mol.K
T₂/T₁ = ratio of temperatures in K = 373 / 273 = 1.37 K
On putting values, we get
ΔS = (1)(4180)ln(1.37) = (4180)(0.315)
ΔS = 1,316.7 J/K
Hence required value of entropy is 1,316.7 J/K.
To know more about entropy, visit the below link:
https://brainly.com/question/419265
#SPJ4
What type of soil has the most permeability
The water in Mario's swimming pool absorbs energy as heat during the day. Which of the following
would the water in the pool be most likely to do?
Answer: evaporate
Explanation:
