Which safety data sheet section includes chemical abstract service number, european commission number and european chemical agency number?
Answers
The safety data sheet section which includes chemical abstract service number, european commission number and european chemical agency number are section3 and section 1 respectively.
Section 3 lists the ingredients, including stabilizers and contaminants, that are present in the product mentioned on the SDS. Information on compounds, concoctions, and any chemicals where a trade secret is asserted is provided in this section. The following details must be included in this section are Chemical Abstract Service (CAS) number and other unique identifiers.
The Safety Data Sheet(SDS's) compounds are listed in Section 1 along with suggested applications. It also offers the supplier's contact details. This section must have the following information of name, location, contact information, and emergency phone number for the manufacturer, importer, or other accountable party like European commission number and European chemical agency number.
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Related Questions
in the periodic table the atomic number represents
Answers
The atomic number represents the amount of protons in the nucleus of an atom
Hope this helps!
Define physical and chemical properties, provide three examples of each, discuss their reversibility, and explain the fundamental differences between them.
Answers
Answer:
Physical properties are defined as the properties which can be observed without changing its chemical composition.
For example: color, volume, and molecular weight.
Chemical properties are defined as the properties which can be observed only after changing chemical identity of the substance.
For example: reactivity, toxicity, and flammability.
The fundamental differences between physical and chemical properties are as follows:
Chemical properties are related to chemical bonds of the substance while physical properties are not.
In chemical properties, chemical identity of substance changes while physical properties do not have any change.
Chemical properties predict the reaction of substance while physical properties only describe the appearance of the substance.
Explanation:
Answer:
A measurable property that can be observed typically and explains any matter or organism's appearance and physical behavior is called a physical property. Examples of physical properties are appearance, boiling point, freezing point, melting point, colors, odor, mass, density, solubility. Properties that are only observed during a reaction or change in the composition of a matter is called a chemical property. These properties describe the internal part of anything and explain how it behaves when reacted with other chemical substances. Examples are enthalpy, entropy, reactivity, flammability, oxidation state, acidity, basicity. Some physical properties are reversible or sometimes irreversible. Like the change of states of matter is reversible, and the growth of an organism is irreversible. The same thing with the chemical properties. There are reversible chemical reactions(formation of ammonium chloride) and irreversible chemical reactions. (burning of a chemical substance). After knowing all about these properties, the most fundamental difference is that the physical properties can be measured without any chemical change in them. But a chemical property is measurable when the substance goes through a chemical reaction.
Explanation:
Order the following mass measurements from smallest to largest. List the smallest measurement at the top. 1 Place these in the proper order. 10 mg 109 10 g 10 kg 10 Mg
Answers
The order of the mass measurements from smallest to largest is: 10 mg: This is the smallest unit of mass measurement in the given list. It is equal to 0.01 grams or 0.00001 kilograms.
10 g: This is the second smallest unit of mass measurement in the given list. It is equal to 10,000 milligrams or 0.01 kilograms.
10 kg: This is the second largest unit of mass measurement in the given list. It is equal to 10,000 grams or 10,000,000 milligrams.
10 Mg: This is the largest unit of mass measurement in the given list. It is equal to 10,000 kilograms or 10,000,000 grams.
It is important to understand the different units of mass measurement and their conversions, as they are used in many fields, such as science, engineering, and medicine, to measure and calculate the properties of objects and materials.
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2. calculate the approximate yield in atp molecules of the complete oxidation of hexanoic acid (6:0).
Answers
To calculate the approximate yield of ATP molecules from the complete oxidation of hexanoic acid, follow these steps:
1. Determine the number of carbons in hexanoic acid: Hexanoic acid (C6H12O2) has 6 carbons in its chain (hence the prefix "hex").
2. Calculate ATP yield from beta-oxidation: In beta-oxidation, each cycle removes two carbons in the form of acetyl-CoA. Hexanoic acid undergoes 2 cycles of beta-oxidation, producing 3 acetyl-CoA molecules. Each cycle generates 1 FADH2 (equivalent to 1.5 ATP) and 1 NADH (equivalent to 2.5 ATP). So, 2 cycles generate (1.5+2.5) x 2 = 8 ATP.
3. Calculate ATP yield from the citric acid cycle: Each acetyl-CoA produced in beta-oxidation goes through the citric acid cycle, generating 3 NADH (each equivalent to 2.5 ATP), 1 FADH2 (equivalent to 1.5 ATP), and 1 GTP (equivalent to 1 ATP) per cycle. Therefore, 3 acetyl-CoA molecules generate (3x2.5 + 1.5 + 1) x 3 = 34.5 ATP.
4. Subtract 2 ATP for activation: Hexanoic acid needs to be activated to its CoA form, consuming 2 ATP.
5. Calculate the total ATP yield: Add the ATP generated from beta-oxidation and the citric acid cycle, and subtract the ATP used for activation: 8 + 34.5 - 2 = 40.5 ATP.
The approximate yield of ATP molecules from the complete oxidation of hexanoic acid is 40.5 ATP.
The approximate yield in ATP molecules of the complete oxidation of hexanoic acid is 36 ATP molecules.
How to determine the yield of ATP molecules?To calculate the approximate yield in ATP molecules of the complete oxidation of hexanoic acid, we need to follow these steps:
1. Determine the number of carbon atoms in hexanoic acid: Hexanoic acid has 6 carbon atoms (\(C_{6}H_{12}O_{2}\)).
2. Convert hexanoic acid to acetyl-CoA: Since one molecule of acetyl-CoA contains 2 carbon atoms, the 6-carbon hexanoic acid will be converted into 3 molecules of acetyl-CoA.
3. Calculate the ATP yield from beta-oxidation: No beta-oxidation occurs in this case because the fatty acid chain has already been fully converted into acetyl-CoA molecules.
4. Calculate the ATP yield from the citric acid cycle (TCA cycle): Each acetyl-CoA molecule produces 12 ATP molecules through the TCA cycle. Therefore, 3 acetyl-CoA molecules will produce 3 x 12 = 36 ATP molecules.
5. Add the ATP yield from both processes: Since there is no ATP yield from beta-oxidation in this case, the total ATP yield is only from the TCA cycle. So, the approximate yield in ATP molecules of the complete oxidation of hexanoic acid is 36 ATP molecules.
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what is the amount of gold present in 15.5g of a pure gold ring? (Au=197)
Answers
Answer:
.0787 moles
Explanation:
I'm assuming you mean moles of gold present as the "amount."
This is a moles to moles calculation, so we set it up as such:
*Note that 15.5g Au is given to us, and 197 g / mol of Au is gold's molar mass.
15.5g Au * (1 mol Au / 197 g Au) = ?
We can evaluate the equation to get 15.5 / 197 to get .0787 moles of Au.
HELP!!!! ASAP!!!!
Complete the following sentences. Energy is required to _______ bonds in a molecule and released when bonds are _______.
Answers
Answer:
create and destroyed
Explanation:
its just simple science
Answer:
Create bonds
Broken
Explanation:
Energy is required to created bonds in a molecule and released when bonds are broken.
Energy is needed in chemical reactions to do work.
During bond dissociation, energy is released as a by product.In some cases, they energy is very useful for other processes. Also, when bonds are being formed, the attraction between chemical species stored up chemical energy.All compounds are made of
a. atoms of two or more elements
b. two or more atoms of the same element
c. atoms arranged into a crystal
d. atoms joined by covalent bonds
sorry, guys! last one!
Answers
Answer: a. atoms of two or more elements
For example:H20
Explanation:
D) is a molecule
B) doesn't need to be same element
Answer: a
Explanation:
PLEASE ANSWER!!!!! 35 POINTS!!
How many moles of P2O3 are required to fully react with 108 H2O? (H2O; 18 g/mol)
P2O3 + 3H2O --> 2H3PO3
108 gH2O ---> mol P2O3
Answers
108 g H2O x (1 mol H2O / 18 g H2O) = 6 moles H2O
According to the balanced chemical equation, 3 moles of H2O react with 1 mole of P2O3 to produce 2 moles of H3PO3. Therefore, you need to divide the number of moles of H2O by 3 and multiply by 2 to get the number of moles of H3PO3 required:
6 moles H2O / 3 x 2 moles H3PO3 / 1 mole P2O3 = 4 moles P2O3
So, you would need 4 moles of P2O3 to fully react with 108 g of H2O.
which pair of compounds will not form a buffer in the solution? group of answer choices nacl, hcl h3po4, kh2po4 nh3, nh4cl h2so3, khso3
Answers
Among the given pairs of compounds, the pair of compounds that will not form a buffer in the solution is NaCl and HCl. A buffer solution is an aqueous solution that has a highly stable pH.
Buffer solutions consist of weak acids or weak bases and their respective conjugate bases or conjugate acids. Buffer solutions can regulate the pH of a reaction or a solution, which is why they are used in a variety of laboratory settings. The buffer solution has the following characteristics: It has a constant pH, even though there is an addition of a small amount of acid or base.
A buffer solution has a weak acid or weak base, with its conjugate base or acid. These conjugate acid-base pairs are capable of neutralizing small amounts of either an acid or base. When it comes to identifying the buffer solution, we need to identify the buffer pairs.
Therefore, NaCl and HCl will not form a buffer in the solution.
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Calculate the volume of oxygen produced at 298K and 100 kPa by the decomposition of 30 cm3 of 0.1 mol dm_3 H2O2.
Answers
2 H2O2 (aq) → 2 H2O (l) + O2 (g)
From this equation, we can see that for every 2 moles of hydrogen peroxide that decompose, 1 mole of oxygen is produced.
We can start by calculating the number of moles of H2O2 that are present in 30 cm3 of 0.1 mol dm-3 H2O2:
30 cm3 = 30/1000 dm3 = 0.03 dm3
number of moles of H2O2 = concentration × volume = 0.1 mol dm-3 × 0.03 dm3 = 0.003 moles
Since 2 moles of H2O2 decompose to produce 1 mole of O2, we can calculate the number of moles of O2 produced:
number of moles of O2 produced = 0.003 moles H2O2 × (1 mole O2 / 2 moles H2O2) = 0.0015 moles O2
Now we can use the ideal gas law to calculate the volume of O2 produced:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant (0.0821 L atm mol-1 K-1), and T is the temperature in Kelvin.
We can rearrange this equation to solve for V:
V = nRT / P
Plugging in the values, we get:
V = (0.0015 mol)(0.0821 L atm mol-1 K-1)(298 K) / (100 kPa)(101.325 kPa atm-1)
V = 0.0377 L
Therefore, the volume of oxygen produced at 298K and 100 kPa by the decomposition of 30 cm3 of 0.1 mol dm-3 H2O2 is 0.0377 L.
in the experimental procedure, which step would be made easier through the application of ultrasonic waves?
Answers
The dispersion and mixing of particles would be made easier through the application of ultrasonic waves.
Which step in the experimental procedure benefits from the application of ultrasonic waves?Ultrasonic waves can facilitate the dispersion and mixing of particles in an experimental procedure. When ultrasonic waves are applied, they generate high-frequency sound waves that create alternating compression and rarefaction waves in a liquid medium.
These waves produce tiny bubbles due to the phenomenon of cavitation. During cavitation, the bubbles rapidly expand and collapse, creating localized areas of high pressure and temperature.
This process exerts mechanical forces on the surrounding particles, leading to their effective dispersion and mixing. The energy from ultrasonic waves helps to break down agglomerates, disperse fine particles, and enhance the overall homogeneity of the mixture.
The application of ultrasonic waves can be particularly beneficial in procedures such as sample preparation, emulsification, dispersion of nanoparticles, and dissolution of substances. It improves the efficiency and effectiveness of processes that require uniform distribution and thorough mixing of components.
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Pretest: Unit 2
Question 7 of 20
Which energy transfer occurs when a cube of ice is placed in a glass of
water?
O A. The chemical energy of the ice is transferred to the liquid wat
Answers
The energy transfer that occurs when a cube of ice is placed in a glass of water is a form of heat transfer known as "heat exchange" or "heat transfer by conduction".
What is heat transfer?
Heat always moves from a warmer object to a cooler one, and in this case, the ice cube is at a lower temperature than the liquid water, so heat moves from the water to the ice cube.
As the ice cube absorbs heat energy from the water, the ice melts and the temperature of the water decreases. This process continues until the ice has completely melted and the water and ice are at the same temperature.
So, to answer the question directly, the energy transfer that occurs when a cube of ice is placed in a glass of water is not a transfer of chemical energy from the ice to the water, but rather a transfer of thermal energy from the water to the ice.
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Complete question is: "heat exchange" or "heat transfer by conduction" occurs when a cube of ice is placed in a glass of water.
please help, i’m not good with science
Answers
Answer:
cohesion and surface density
Explanation:
What is the pOH of water?
Answers
Answer:
A. 7
(assuming the water is neutral)
When electrons jump off, They (scientific term)
Will give brainliest
Answers
Answer:
When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. This higher energy state is to imagine that the electron is now moving faster, (it has just been "hit" by a rapidly moving photon) Electrons therefore have to jump around within the atom as they either gain or lose energy
Explanation:
They gain or lose energy.
Voluntary muscles
a.are muscles that work automatically.
b.are only in your arms and legs.
c.are muscles that you can control.
d.are muscles that push.
Answers
Answer: C.
Explanation:
Voluntary muscle are muscles that you can control.
What quantity is needed to convert between the moles of a
given sample of a substance and its mass in grams?
a the molar mass of the substance
b the density of the substance
с
the physical state of the substance
d all of the above
Check it
Answers
Answer:
a
the molar mass of the substance
Answer: a
The molar mass of the substance
Explanation:
. What are two major organs of the excretory system?
Answers
Answer:
Kidney and bladder..............
Answer:
Option B
The answer is Kidneys and Bladder
Explanation:
The Excretory Organs
A pair of KidneyA pair of Uterus A Urinary BladderA UrethraBut, Kidneys and Bladder is the major organ in Excretory System
Thus, The answer is Kidneys and Bladder
-TheUnknownScientist
Answer this if u know science please
Answers
Answer:
1. DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
2. both
Explanation: Since errors can occur when DNA replicates itself, mutations can occur in both asexually and sexually reproducing organisms.
asymmetrical alkyne + Hâ‚‚O + Hâ‚‚SOâ‚„ + HgSOâ‚„
Answers
The reaction you have written is a classic example of the hydration of an alkyne. The HgSO4 serves as a catalyst for the reaction. Here is the balanced chemical equation for the reaction:
Asymmetrical alkyne + H2O + H2SO4 + HgSO4 → Ketone
The product of this reaction is a ketone. The exact ketone produced will depend on the structure of the alkyne used.
The mechanism for this reaction involves the addition of water to the triple bond of the alkyne, followed by protonation of the resulting alkene intermediate to form a carbocation.
The carbocation then undergoes nucleophilic attack by water, followed by deprotonation to yield the final ketone product.
It's worth noting that the use of mercury salts as catalysts in organic reactions is generally discouraged due to their toxicity and potential environmental impact.
There are alternative catalysts that can be used for the hydration of alkynes, such as palladium or platinum complexes.
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in a saturated solution of na3 po4 , [na ] = 0.30 m. what is the molar solubility of na3 po4 ?
Answers
The molar solubility of Na3PO4 in a saturated solution where [Na+] = 0.30 M is 1.0 x 10^-26 M.
The molar solubility of Na3PO4 can be determined using the solubility product constant (Ksp) expression for the dissociation reaction of Na3PO4:
Na3PO4(s) ⇌ 3Na+(aq) + PO43-(aq)
Ksp = [Na+]^3[PO43-]
Since the solution is saturated, the concentration of Na+ is given as 0.30 M. Therefore, we can substitute this value into the Ksp expression and solve for the molar solubility (x) of Na3PO4:
Ksp = (0.30 M)^3 (x)
Simplifying the expression, we get:
Ksp = 0.027x
Rearranging the equation, we can solve for x:
x = Ksp / 0.027
The value of Ksp for Na3PO4 is 2.7 x 10^-28 (at 25°C), so substituting this value into the equation gives:
x = (2.7 x 10^-28) / 0.027
x = 1.0 x 10^-26 M
Therefore, the molar solubility of Na3PO4 in a saturated solution where [Na+] = 0.30 M is 1.0 x 10^-26 M.
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What is the molar concentration a a 12 % sodium chloride solution (MW 58.5)
Answers
The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.
To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.
First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.
In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.
To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.
We can start by calculating the number of moles of sodium chloride in 12 grams:
Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride
Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles
Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:
Volume of solution = mass of solution / density
Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L
Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:
Molar concentration = moles of solute / volume of solution
Molar concentration = 0.205 moles / 0.1 L = 2.05 M
Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.
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Calculate the efficiency of a simple 5 pulley machine that pulls bucket of 50 liters of water with an effort of 250N.
Answers
Answer:
Explanation:
A machine's efficiency is a measure of how much of its input energy is turned into usable output. The following formula is used to calculate a machine's efficiency:
(Output Work / Input Work) x 100% = Efficiency
The output work in this situation is the work done by the machine to draw the bucket of water, and the input work is the effort exerted by the person running the machine.
Work produced = Force x Distance
Distance = the distance traveled by the bucket = 50 liters
As a result, the output work = 250 N x 50 L = 12500 J. (Joules)
Work input = effort x distance
Distance = the distance over which effort is exerted = 5 pulleys
So the input work is 250 N multiplied by 5 pulleys is 1250 N.
(Output Work / Input Work) x 100% = Efficiency
(12500 J / 1250 J) x 100% = Efficiency
10 × 100% Equals 1000% efficiency
It should be noted that the efficiency is expressed as a percentage and should be less than 100%. However, in this example, the answer is 1000%, which is implausible.
This might be because of an error in the input data or a misunderstanding of the situation.
(Pleaseeee help me) List 3 things you should talk about in a good conclusion?
Answers
Throughout your essay, you’ve shared experiences, skills and knowledge that have driven you toward who you are today. In your conclusion, remind the admissions team about how all those different elements work in combination to make you a unique candidate for their program.
2) It recaps where you are.
This is an aspect applicants often forget to include. You are at a crucial junction between the past and the future, and this program you’re applying to is the bridge. Recap why this program is an important stepping stone in your career path and how it’s a good fit for you personally.
3) It recaps where you are going.
Most importantly, you must tell the admissions team what your long-term career goal is. The more specific you can be, the better (even if you aren’t 100% sure, it’s best to come off as confident that you know what you want!). For example, rather than just recapping that you want to become a doctor, you can share additional sub-goals, such as wanting to be a doctor who works in low-income, inner city hospitals since you volunteered at those types of facilities before. Or perhaps you plan to go back to the country where you grew up and work as a surgeon there since they are in such short supply.
Bring It Together
Once we bring all three of those elements together, you can see how they link together to form one, solid conclusion. Ideally, your conclusion should be about 4-6 sentences long — not too short but not a long ramble. Below is an example showing how fusing the past (1), present (2) and future (3) together can end your essay on a strong note.
Answer:
easy, beging sentenice(dont judge spelling), refer to quotes, final thoughts
Explanation:
HELP ASAP PLEASE. What stress would shift the equilibrium position of the following system to the right? N2O3(g) ⇌ NO(g) + NO2(g); ΔH is positive Increasing the concentration of N2O3 Heating the system Adding a catalyst Decreasing the concentration of NO
Answers
Answer:
there is no change because when you remove NO it will make the reaction balance
Answer:
B: Heating the system
Explanation:
took test
If an atom of Phosphorous has 17 neutrons, what is its mass number?
a) 31
b) 32
c) 15
D) 17
Answers
The number of protons in the nucleus of an atom of phosphorus is equal to the atomic number of phosphorus, which is 15. If an atom of phosphorus has 17 neutrons, then the mass number would be 15 protons + 17 neutrons = 32. Thus, the correct answer choice here is B.
What mass of solute will dissolve in 100mL of water at the following temperatures? Don't forget your units!
a. KNO3 at 70°C =
Answers
Answer:
Maybe 135g
Explanation:
The car has a rechargeable battery to drive it’s motor. The rechargeable battery provided a potential difference of 330 volts and can store up to 64 mega Jules it takes 8 hours for the battery to receive a full charge assume that the charging process is 100% efficient calculate the total charge the flows while the battery is being charged
Answers
The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.
To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.
The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):
E = V * Q
Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):
Q = E / V
Substituting the given values, we have:
Q = 64 MJ / 330 V
To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:
Q = (64 * 10^6 J) / 330 V
Calculating the division:
Q ≈ 193,939.39 Coulombs
Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.
This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.
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glyceraldehyde 3-phosphate dehydrogenase causes ________.
Answers
Neither the reduction and phosphorylation of glyceraldehyde 3-phosphate to produce 1,3-bisphosphoglycerate nor the oxidation of a molecule of NAD+ to NADH.
What is G3P and how does it work?
The energy-producing processes glycolysis and glycerolipid biosynthesis both require glycerol-3-phosphate (G3P), which is a necessary component.
Enzymes involved in G3P biosynthesis and catabolism, as well as those involved directly or indirectly in G3P biosynthesis, control the amount of G3P in plants.
What is the purpose of glyceraldehyde 3-phosphate?
The end result of the Calvin cycle is glyceraldehyde 3-phosphate, or G3P. A 3-carbon sugar, it serves as the building block for the creation of other carbs.
The cycle is continued in part by using this G3P to regenerate the RuBP, but some of it is also available for molecular synthesis and is utilized to create fructose diphosphate.
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What temperature in Kelvin is 52 degree C?
Answers
Answer:
325.15
Explanation:
℃ = K - 273.15
52+273.15=K
K= 325.15