Answers
To check the protein in the drink the test carried out is Biuret Test
What is Biuret Test?
The chemical test known as the "Biuret test" uses the Biuret reagents to produce the compound known as "Biuret," which is created by heating urea to 180 °C. A 1% solution of Copper II sulphate is used in the test
(\(CuSO_{4}\)). The peptide bonds found in proteins create a compound with the \(Cu^{2+}\) in the Biuret reagent. This test therefore aids in identifying peptide bonds in any substance.
The reagent in the biuret test does not really include biuret; however, the test's name derives from the fact that the peptide-like linkages in the biuret molecule produced a favorable reaction.
Two of the many more sophisticated variations of the biuret test are the Lowry test and the BCA test.
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Related Questions
If 80% of the moths are dark and you have 80 moths, how
many would be dark??
Answers
Answer:
the answer is 64 moths are dark
Identify each element fluorine, germanium, zinc, phosphorus, lithium as a metal, metalloid or nonmetal
Answers
Answer:
flo-non metal
germ- metalloid
zinc - metal
phos- non metal
lithium- metal
A voltaic cell is constructed based on the following pair of half-reactions. identify the components in the cell below. ag+(aq)+1e- rightarrow ag(s) cd2+(aq)+2e- rightarrow cd(s) write the balanced equation for the cell reaction. (includes states and charges.)
Answers
A voltaic cell is constructed based on ag+(aq)+1e- rightarrow ag(s) cd2+(aq)+2e- rightarrow cd(s) , the balanced equation for the cell reaction. Cd(s) +2 Ag* (aq)⇒2 Ag(s) + Cd2+ (aq)
Ag* (aq) + e- →→Ag(s E° +0.7996 V
Cd²+(aq) + 2e¯→→Cd(s) E° = -0.40V
So, the cell potential is calculated as follows:
E° cell = E° cathode - E°anode
For the reaction to be spontaneous, the E should be postive, thatis cell
greater than 0.
Thus, E°cathode-E°anode>0
E° cathode > E° anode
So, the value of volatic cell potential will be more for the cathode.
Here, the E° is more for Ag+ (aq) | Ag(s) and less for Cd2+ (aq) |Cd(s). Therefore, Ag* (aq)| Ag(s) acts as a cathode and Cd²+ (aq) | Cd(s)
acts as an anode.
Add the two half-reactions as follows:
2 Ag* (aq) + 2e→→2 Ag(s)
Cd(s) —Cd²+(aq) + 2e
Cd(s)+2 Ag* (aq)2 Ag(s)+Cd2+ (aq)
Therefore, the balanced equation is as follows:
Cd(s) +2 Ag* (aq)-2 Ag(s) + Cd2+ (aq)
A voltaic cell is constructed based on the following pair of half-reactions. identify the components in the cell below. ag+(aq)+1e- rightarrow ag(s) cd2+(aq)+2e- rightarrow cd(s) write the balanced equation for the cell reaction. (includes states and charges.?
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Does silver form a gas? Yes or no.
Answers
Answer:
Yes it does
Explanation:
Silver is a chemical element with the symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal.[citation needed] The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc refining.
A 0.4272 g sample of an element contains 2.241 x 10 ^21 atoms . what is the symbol of the element?
Answers
Answer:
Likely \(\rm In\) (indium.)
Explanation:
Number of atoms: \(N = 2.241 \times 10^{21}\).
Dividing, \(N\), the number of atoms by the Avogadro constant, \(N_A \approx 6.023 \times 10^{23} \; \rm mol^{-1}\), would give the number of moles of atoms in this sample:
\(\begin{aligned} n &= \frac{N}{N_{A}} \\ &\approx \frac{2.241 \times 10^{21}}{6.023 \times 10^{23}\; \rm mol^{-1}} \approx 3.72 \times 10^{-3}\; \rm mol \end{aligned}\).
The mass of that many atom is \(m = 0.4272\; \rm g\). Estimate the average mass of one mole of atoms in this sample:
\(\begin{aligned}M &= \frac{m}{n} \\ &\approx \frac{0.4272\; \rm g}{3.72 \times 10^{-3}\; \rm mol} \approx 114.82\; \rm g \cdot mol^{-1}\end{aligned}\).
The average mass of one mole of atoms of an element (\(114.82\; \rm g \cdot mol^{-1}\) in this example) is numerically equal to the average atomic mass of that element. Refer to a modern periodic table and look for the element with average atomic mass \(114.82\). Indium, \(\rm In\), is the closest match.
The symbol of the element is In
StoichiometryFrom the question, we are to determine the identity of the element
First, we will determine the number of moles of sample present
Using the formula
\(Number \ of\ moles = \frac{Number\ of \ atoms }{Avogadro's\ constant}\)
Number of moles of the sample = \(\frac{2.241\times 10^{21} }{6.022\times 10^{23} }\)
Number of moles of the sample = 0.003721355 mole
Now, we will determine the Atomic mass of the sample
From the formula,
\(Atomic\ mass = \frac{Mass}{Number\ of\ moles}\)
Therefore,
Atomic mass of the sample = \(\frac{0.4272}{0.003721355}\)
Atomic mass of the sample = 114.8 amu
The element that has an atomic mass of 114.8 amu is Indium. The symbol of Indium is In.
Hence, the symbol of the element is In.
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If a sample containing 18.1 g of NH3 is reacted with 90.4 g of
Cuo, which is the limiting reactant? How many grams of N2
will be formed?
Answers
Answer:
3.64g
Explanation:
Given parameters:
Mass of NH₃ = 18.1g
Mass of Cu₂O = 90.4g
Unknown:
Limiting reactant = ?
Mass of N₂ formed = ?
Solution:
The reaction equation is given as:
Cu₂O + 2NH₃ → 6Cu + N₂ + 3H₂O
The limiting reactant is the one in short supply in the reaction. Let us find the number of moles of the given species;
Number of moles = \(\frac{mass}{molar mass}\)
Molar mass of Cu₂O = 2(63.6) + 16 = 143.2g/mol
Molar mass of NH₃ = 14 + 3(1) = 17g/mol
Number of moles of Cu₂O = \(\frac{18.1}{143.2}\) = 0.13moles
Number of moles of NH₃ = \(\frac{90.4}{17}\) = 5.32moles
From this reaction;
1 mole of Cu₂O combines with 2 mole of NH₃
So 0.13moles of Cu₂O will combine with 0.13 x 2 mole of NH₃
= 0.26moles of NH₃
Therefore, Cu₂O is the limiting reactant. Ammonia is in excess;
Mass of N₂;
Mass = number of moles x molar mass
1 mole of Cu₂O will produce 1 mole of N₂
0.13 mole of Cu₂O will produce 0.13 mole of N₂
Mass = 0.13 x (2 x 14) = 3.64g
31.7 grams of water form based on the following equation. What was the change in heat
for the reaction?
CH4 + 2 O2 → CO₂ + 2 H₂O
ΔΗ = -890.8 kJ/mol
Answers
31.7 g of water formation in the given reaction releases 783.02 kJ of heat energy.
The change in heat in the given equation is -890.8 kJ/mol. This means that when one mole of CH4 reacts with 2 moles of O2, it produces one mole of CO2 and 2 moles of H2O while releasing 890.8 kJ of heat energy.Now, we have to find out how much heat energy will be released when 31.7 g of water is formed. To do this, we need to first calculate the number of moles of water formed from 31.7 g of H2O.Molar mass of H2O = 2 × 1.008 + 15.999 = 18.015 g/molNumber of moles of H2O = 31.7 g / 18.015 g/mol = 1.759 molNow we know that 2 moles of H2O are formed when 1 mole of CH4 reacts. Therefore, the number of moles of CH4 required to produce 1.759 mol of H2O will be:1 mole of CH4 : 2 moles of H2Ox moles of CH4 : 1.759 moles of H2Ox = 1.759/2 = 0.8795 molSo, 0.8795 moles of CH4 are required to produce 1.759 moles of H2O. And the heat released during the reaction of 0.8795 mol CH4 can be calculated using the given change in heat.ΔH = -890.8 kJ/molHeat released during the reaction of 0.8795 mol CH4= ΔH × number of moles= -890.8 kJ/mol × 0.8795 mol= -783.02 kJ.
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Which amphibian organ has a high blood supply and many folds to increase surface area?
a. heart
b. stomach
c. lungs
d. brain
Answers
Answer:
lungs
Explanation:
If you were to combine two carbon-12 atoms in a fusion process, what element would you get?.
Answers
The element would you get is Mg. 6C12 + 6C12 1 11Na24 + +1e0.
The first step in making carbon is to fuse the nuclei of hydrogen the lightest element to make helium the second lightest element. The next step is to fuse the two helium 4 nuclei. Each contains two protons and two neutrons. Forms beryllium-8. This takes in another helium and produces carbon-12.
The main problem in the carbon cycle is proton addition but after a carbon-12 nucleus fuses with a proton to form nitrogen-13 one of the protons decays to carbon-13 emitting a positron and a neutrino. Two more proton captures produce nitrogen-14 and then oxygen-15. Stellar Fusion Reactors In massive stars hydrogen burns to form helium. This produces carbon which can be further processed into oxygen and heavier elements.
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Which equation is correctly balanced?
Answers
Answer:
When the moles of the reactant is equal to the mole of the product.
If two metals had the same specific heat, how can we distinguish them in two ways?
Answers
Answer:
Specific heat is an intensive property (like density, color, etc.) that does not depend on the amount of a substance present. This allows substances to be identified using their specific heat. Imagine an unknown metal of known mass is heated to a known temperature.
Explanation:
Describe the function of a cilia.
Answers
Answer:
hope it helps..
Explanation:
'Motile' (or moving) cilia are found in the lungs, respiratory tract and middle ear. ... These cilia have a rhythmic waving or beating motion. They work, for instance, to keep the airways clear of mucus and dirt, allowing us to breathe easily and without irritation.
Answer: to keep airway clear of mucus and dirt allowing us to breathe easy
Explanation:
What is the coefficient for sodium chloride when this equation is balanced?
Answers
Answer:
To resolve this, we need to place the coefficient “2” in front of the sodium in the reactant, to give the equation shown below. 2 Na (s) + Cl 2 (g) → 2 NaCl (s) In this equation, there are two sodiums in the reactants, two sodiums in the products, two chlorines in the reactants and two chlorines in the products; the equation is now balanced.
Explanation:
Which of these compounds has an empirical formula of CH3?
1. C2H5
2.C13H26
3.C26H78
4.C36H110
Answers
Answer:
B I had the same queastion as this one
how many moles of nitrogen gas are produced in the reaction if we started with 6 moles of ammonium nitrate
Answers
The molar ratio between Nitrogen and ammonia is
1
:
3
, therefore, to produce 18 moles of ammonia, we will need
A pregnant client experienced preterm labor at 30 weeks gestation. Upon assessing the client the nurse finds that the newborn is at risk of having cerebral palsy. Which medication administration should the nurse perform to prevent cerebral palsy in the newborn?
A. Calcium gluconate.
B. Magnesium sulfate.
C. Glucocorticoid drugs.
D. Antibiotic medications
Answers
The medicine that has to be given by the nurse to prevent cerebral palsy in the new-born is magnesium sulphate.
The term "cerebral palsy" refers to a collection of conditions that impair mobility and posture development and are thought to be caused by non-progressive abnormalities. Insults that caused cerebral palsy are thought to have happened during foetal development or early childhood. A significant risk factor for cerebral palsy is preterm delivery, and that risk rises sharply as gestational age decreases. Right now, 25% of all new occurrences of cerebral palsy are caused by babies delivered before 34 weeks of pregnancy. Cerebral palsy risk is higher when there are several pregnancies. MgSO4 was infused continuously at a rate of 2 g/h for up to 12 hours after a 6 g loading dose. Given before delivery, magnesium sulphate is known to regulate the vasculature and minimize hypoxia effects by neutralising cytokine or excitatory amino acid damage, which may lower the risk.
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HELP PLEASE PLEASE PLEASE. Can anyone tell me how to separate the following mixture
A) ethanol in water
B) boiling the mixture of chloride crystals with water
C) pure water from muddy water
D) sodium chloride in water
E) sodium carbonate in water
F) chlorophyll from leaves
G) mixture of acetic acid and alcohol
H) serum from blood sample
I) kerosene from water
J) ammonium chloride in sand
I NEED CORRECT ANSWERS ONLY.
HURRY UP PLEASE. I WILL MARK AS BRAINLIEST
Answers
A) Ethanol in water: Distillation.
B) Boiling the mixture of chloride crystals with water: Evaporation.
C) Pure water from muddy water: Filtration.
D) Sodium chloride in water: Evaporation or Crystallization.
E) Sodium carbonate in water: Filtration or Evaporation.
F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol.
G) Mixture of acetic acid and alcohol: Distillation.
H) Serum from blood sample: Centrifugation.
I) Kerosene from water: Separatory funnel or Decantation.
J) Ammonium chloride in sand: Sublimation or Dissolving in water and Filtration.
A) Ethanol in water: Distillation can be used to separate ethanol from water based on their different boiling points.
B) Boiling the mixture of chloride crystals with water: By heating the mixture, the water will evaporate, leaving behind the chloride crystals.
C) Pure water from muddy water: Filtration can be used to separate the solid particles (mud) from the water.
D) Sodium chloride in water: Evaporation can be used to separate sodium chloride from water by heating the mixture until the water evaporates, leaving behind the salt.
E) Sodium carbonate in water: Filtration can be used to separate solid sodium carbonate from water, similar to muddy water.
F) Chlorophyll from leaves: Extraction using a suitable solvent like ethanol or acetone can be used to separate chlorophyll from leaves.
G) Mixture of acetic acid and alcohol: Distillation can be used to separate the mixture based on their different boiling points.
H) Serum from blood sample: Centrifugation can be used to separate the serum, which is the liquid part of blood, from the solid components like cells.
I) Kerosene from water: Separatory funnel or decantation can be used to separate the immiscible liquids by pouring off the top layer (kerosene) from the bottom layer (water).
J) Ammonium chloride in sand: Sublimation can be used to separate ammonium chloride by heating the mixture, causing the ammonium chloride to vaporize and then condense back into solid form in a cooler region, leaving the sand behind.
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-physical and chemical methods
of monitoring the rate of
chemical reaction
Answers
1. Measuring changes in concentration: By measuring changes in the concentration of reactants or products, you can calculate the rate of the reaction. This can be done using spectrophotometry or titration.
2. Temperature measurement: The rate of a reaction is often temperature-dependent. By monitoring the temperature of the reaction mixture over time, you can determine the rate at which the reaction is proceeding.
3. Gas volume measurement: In reactions that produce or consume gases, measuring the volume of gas generated or consumed over time can give you an idea of the reaction rate. This can be done using a gas syringe or a gas burette.
4. Conductivity measurement: If the reaction involves the transfer of ions, measuring the conductivity of the reaction mixture can provide information about the reaction rate.
5. Pressure measurement: In some reactions, the pressure of the reaction mixture changes as the reaction proceeds. Measuring the pressure change over time can give you an idea of the reaction rate.
These are just a few examples of physical and chemical methods for monitoring the rate of a chemical reaction. The choice of method will depend on the nature of the reaction and the information you need to obtain.
Physical methods include monitoring temperature, pressure, and color change. Chemical methods include titration and gas analysis.
What are methods of monitoring chemical reaction?Monitoring the rate of chemical reactions is important to understand the kinetics of the reaction and optimize the reaction conditions. Physical and chemical methods are used for this purpose.
Physical methods include measuring the change in temperature, volume, and pressure of the reactants and products with time. The rate of reaction can be calculated from the rate of change of these parameters.
Chemical methods include monitoring the concentration of reactants and products with time. This can be done by techniques such as spectroscopy, chromatography, and electrochemistry. These methods are often more accurate and precise than physical methods.
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A. An element with the valence electron configuration 5s1 would form a monatomic ion with a charge of ______In order to form this ion, the element will ____ ____ electron(s) from/into the _______subshell(s).
Answers
Answer: A. An element with the valence electron configuration 5s1 would form a monatomic ion with a charge of Answer: +1. In order to form this ion, the element will Answer: lose electron(s) from/into the 5s subshell(s).
Explanation:
The system at equilibrium below is heated.
How does the system adjust to reestablish
equilibrium?
2SO₂(g) + O₂(g) ⇒ 2SO3(g) + 198 kJ
Answers
According to Le Chatelier's principle, when a system at equilibrium is subjected to a stress, it will shift in a way that counteracts that stress. In this case, heating the system adds energy to it, which can be viewed as a stress. To counteract the increase in temperature, the system will shift in the endothermic direction, absorbing some of the added heat.
The forward reaction, in which SO₂ and O₂ combine to form SO₃, is an exothermic process since heat is released. By Le Chatelier's principle, increasing the temperature will shift the equilibrium to the left, favoring the reverse reaction (the endothermic direction). This means that some of the SO₃ molecules will decompose back into SO₂ and O₂.
As the system adjusts to reestablish equilibrium, the concentrations of SO₂, O₂, and SO₃ will change. The concentrations of SO₂ and O₂ will increase, while the concentration of SO₃ will decrease. This shift occurs in an attempt to consume some of the excess heat and reduce the temperature back towards the original equilibrium.
Overall, heating the system disrupts the equilibrium, causing a shift towards the reverse reaction. This shift helps absorb the added heat and restore the system to equilibrium by altering the concentrations of reactants and products.
What are the conditions necessary for fog to form? (Select all that apply)
IM STUCK PLEASE HELP
Answers
Answer:
cooling, addition of moisture, or mixing with another air parcel.
10. A mountain bike's
suspension works on a
series of springs. What
is the energy stored in
the spring when the
bike goes over a bump
causing a compression
of 2cm. The spring
constant is 33N/m.
Answers
Answer:
The energy stored in the spring when the bike goes over a bump is \(6.6\times 10^{-3}\) joules.
Explanation:
Let suppose that spring has a linear behavious, by means of Hooke's Law, definition of Work and Work-Energy Theorem we find that the potential energy stored in the spring (\(U_{g}\)), measured in joules, is defined by:
\(U_{e} = \frac{1}{2}\cdot k\cdot x^{2}\) (1)
Where:
\(k\) - Spring constant, measured in newtons per meter.
\(x\) - Deformation, measured in meters.
If we know that \(k = 33\,\frac{N}{m}\) and \(x = 0.02\,m\), the energy stored by the spring due to compression is:
\(U_{e} = \frac{1}{2}\cdot \left(33\,\frac{N}{m} \right) \cdot (0.02\,m)^{2}\)
\(U_{e} = 6.6\times 10^{-3}\,J\)
The energy stored in the spring when the bike goes over a bump is \(6.6\times 10^{-3}\) joules.
1c. A car drives 464 km in 4 hours. What is its average speed in kilometers per hour? Please SHOW YOUR WORK and INCLUDE UNITS!
Looking for km/hr
Answers
The car's average speed is 116 kilometers per hour.
The entire distance traveled divided by the total time elapsed is the definition of average speed. It is typically stated in terms of the amount of time or distance per unit, such as meters per second (m/s) or kilometers per hour (km/hr).
Average speed = total distance ÷ total time
In this case, the total distance is 464 km and the total time is 4 hours.
Average speed = 464 km ÷ 4 hours
Average speed = 116 km/hr
Therefore, the car's average speed is 116 kilometers per hour.
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200 g of liquid water is frozen in an ice cube tray. What is the total weight of all the ice cubes
Answers
Answer:well it should stay the same since nothing was taken away or
Moved. When it comes to liquids, only the property of shape can change unless you physically take away or add some.
Explanation:
Consider this reaction involving an unknown element X. F2+2XBr⟶Br2+2XF When 1.300 g of XBr reacts, 0.7241 g of Br2 is produced. Calculate the molar mass of X, and then identify its element symbol.
Answers
The molar mass of X would be 63.55 g/mol and the chemical symbol of X would be Cu (copper).
From the equation of the reaction: F2+2XBr⟶Br2+2XF
The mole ratio of XBr to Br2 is 2:1
Mole of Br2 = mass/molar mass
= 0.7241/159.808
= 0.004531 mole
Mole of XBr = 2 x mole of Br2
= 2 x 0.004531
= 0.009062 mole
Molar mass of XBr = mass/mole
= 1.300/0.009062
= 143.456 g/mol
Since the molar mass of Br is 79.904, the molar of X would be:
143.456 - 79.904
= 63.55 g/mol
Hence, X would be Cu.
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The ____________________ is the organ associated with the sense of touch.
a.
nose
c.
heart
b.
liver
d.
skin
Please select the best answer from the choices provided
Answers
When the optically active carboxylic acid below is decarboxylated using the conditions typical in the acetoacetate synthesis, will the ketone product also be optically active?
Answers
Answer:
ye, it will be optically active
Explanation:
a compound is said to be optically active if it can optically rotate.
the removal of carboxyl group and release of cabon dioxide from carboxylic acid in acetoacetate synthesis which will result in production of ketone as given the attachment below.
shown below is the reaction of an alkene with an electrophile. reaction for the mechanism step below, draw curved arrows to show electron reorganization. use the arrow tool to specify the origin and the destination of the reorganizing electrons. consult the arrow-pushing i
Answers
The mechanism of the reaction of an alkene with an electrophile attached below
There's 2 steps in reaction between alkene and electrophile
an electrophilic attackThe K in the KI electrophile is attacked by the two pi electrons from the double bond during the first step of the process, which is denoted by a curved arrow. The hydrogen from HBr and a carbon from the double bond combine to produce a C-H sigma bond thanks to the two pi electrons. In order to create a halide anion, the electrons from the H-X bond simultaneously transfer to the halogen. One of the carbons becomes an intermediate carbocation with an electron deficit when pi electrons from the double bond are removed. The positive charge is housed in an unhybridized p orbital on this sp2 hybridized carbon atom.
Nucleophilic attack by halide anion.In order to receive an electron pair from the nucleophilic halide anion, the generated carbocation can now function as an electrophile. The neutral alkyl halide is the end result of electrophilic addition, and the electron pair transforms into an X-C sigma bond.
The HBr, HCl, HI, and HF halides can all take part in this reaction and add on in the same way. Although various halides do react at varying rates, this is because the H-X bond weakens with increasing X due to inadequate orbital overlap.
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Gаvе аn example of how energy from the sun gets into your cells
Answers
Answer:
production of vitamin D
A science teacher has a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105mL of 60% sugar solution for an experiment?
Answers
Answer:
60/100x105
6300/100
63 are the answer