In terms of supplying sufficient quantities of drinking water, the most important property of an aquifer is high permeability.
Anything over which a person or a company has legal ownership is considered property. Property can refer to both real objects, like homes, automobiles, or appliances, as well as intangible items with the potential for future value, like stock and bond certificates.
Anything that someone, whether a person or a company, has a legal claim to is referred to be property. The owners have some enforceable rights over it because they have a legal title. It can fall into one of two categories: tangible or intangible. Automobiles, business equipment, furniture, and real estate are examples of tangibles.
Property Assets include any land, buildings, and all improvements thereon as well as any rights to the aforementioned.
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A 500. Ml aqueous solution of na3po4 (molarmass=164g/mol) was prepared using 82g of the solute. What is the molarity of na3po4 in the resulting solution?.
The molarity of Na₃PO₄ in the solution is 1 M.
What is molarity?
Molar concentration, also known as molarity, amount concentration, or substance concentration, is a unit used to describe the amount of a substance in a solution expressed as a percentage of its volume. The number of moles per litre, denoted by the unit symbol mol/L as well as mol/dm3 in SI units, is the most widely used unit for molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or 1 M.
From the question,
We are to determine the molarity of the solution.
First, we will determine the number of moles of the solute (Na₃PO₄) present
Mass of Na₃PO₄ = 82 g
Using the formula
[tex]number of moles = mass/molar mass[/tex]
Molar mass of Na₃PO₄ = 163.94 g/mol
∴ Number of moles of Na₃PO₄ present = [tex]82/163.94[/tex]
Number of moles of Na₃PO₄ present = 0.500 moles
Now, for the molarity of the solution
Using the formula
Molarity = no. of moles/volume
Volume of the solution = 500 mL = 0.5 L
∴ Molarity of the solution = [tex]0.500/0.5[/tex]
Molarity of the solution = 1 M
Hence, the molarity of the solution is 1 M.
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According to the Cahn-Ingold-Prelog (CIP) rules for assigning R and S configurations to stereocenters, which of the following substituents has the highest priority? A) -CECH B) -CH₂CH₂ C) -CH=CH₂ D) -CH
Should be aware of the R/S configuration CIP rules' priority ranking. A) -CECH (option A).
How would you define stereocenter?Stereocenter. An atom that is connected to four different atoms is known as a stereogenic center, and simply a stereocenter. A stereocenter, also known as a stereogenic center, is a particle group in which any two groups can be exchanged to produce a stereoisomer.
Is a stereocenter a chiral carbon?When a carbon is joined to four other atoms, or groups of atoms, chiral centers are created. Although they are mirror reflections of one another, chiral compounds are not identical. Stereocenters are also chiral centers, although not usually the other way around.
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what is pressure define pressure
Pressure is a large and continuous force that is either exerted or given on or against an object or thing by something coming into contact with it.
Hope this helps! :)
Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.) 2 silver dishes. photo by mgeurts ag(s) h2s(g) → ag2s(s) h2(g)
To make the silver shiny again, we can do silver tarnishes. The balanced tarnishing reaction is 2Ag(s) + H2S(g) --> Ag2S(s) + H2(g). Hence, the correct coefficients for the reaction above are: 2, 1, 1, 1.
How to write a balanced chemical equation?A balanced reaction is when the coefficient of all atoms in the reactants (the left side) is the same as the products (the right side). Given this equation:
Ag(s) + H2S(g) --> Ag2S(s) + H2(g)
The balanced reaction is:
2Ag(s) + H2S(g) --> Ag2S(s) + H2(g)
Hence, the coefficients of the reaction above are: 2, 1, 1, and 1.
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Perform the following operation.
(3.0 x 104) divide (4.0 × 108)
On performing the operation, we get 0.72
The operation is 3.0x104/4.0x108=312/432=0.72
The division is splitting into different groups.A division is a process of splitting a specific amount into equal parts.Long division is very similar to short division, but it usually involvesOne of the four fundamental mathematical operations, along with addition, subtraction, and multiplication, is division, which is used to divide bigger numbers.Division is the process of dividing a larger group into smaller groups so that each group has an equal number of things.It is an operation used for equal grouping and equal sharing in math.To learn more about division visit:
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What happens to form the brown spots on a tlc plate when you place the developed tlc plate in an iodine chamber?.
there is a complex formed between iodine and many organic compound when you place the developed tlc plate in an iodine chamber
A commonly used semi-destructive visualization method is to expose a developed TLC plate to iodine (I2) vapor. An "iodine chamber" can be created by adding a few iodine crystals to a TLC chamber, or by adding a few iodine crystals to a chamber containing a portion of powdered silica or alumina (Figure 2.33a). When a developed TLC plate is placed in the chamber and capped, the iodine sublimes and reacts with the compounds on the plate, forming yellow-brown spots (Figure 2.33d). The coloration occurs because iodine forms colored complexes with many organic compounds. This stain will work with approximately half the compounds you may encounter.
This method is considered "semi-destructive" because complexation is reversible, and the iodine will eventually evaporate from the TLC plate, leaving the original compound behind. When the coloration fades, it is theoretically possible to use another visualization technique on the TLC plate, although it's possible the compound may have also evaporated by that time.
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what is not true of fuels? group of answer choices they are found in three basic states they can only be volatilized and consumed in the liquid state * they are characterized as any substance that will burn or support combustion wood does not burn
The statement which is not correct about Fuel is that wood does not burn.
Hence, option D is not correct
What do you mean by Fuel?
Fuel can be defined as any substance that upon combustion produces a usable amount of energy which is generally known as fuel.The characteristics of good fuel includes that it should have a high calorific value, environment-friendly and should burn completely without leaving any residue. Fuel should be cheap and readily available. The burning of wood will include an indirect reaction.
Examples include : wood, coal, biogas, LPG, petrol, diesel etc.
Types of Fuels:
Solid Fuels.Liquid Fuels.Gaseous Fuels.Hence, The statement which is not correct about Fuel is that wood does not burn.
Hence, option D is not correct
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- 22. Which of the following CANNOT be done by a simple machine?
a. increase the amount of work done
b. change the direction of a force
c. decrease the time it takes to do the work
d. transfer energy from one location to another
Answer:
The answer is D
Explanation:
Hope this helps!
How many moles of Neon are in 68.4 grams?
Answer: 3.39 moles
Explanation:
Answer:
3.39
Explanation:
The molecular formula for Neon is Ne. The SI base unit for the amount of substance is the mole. 1 grams of Neon is equal to 0.049554750566163 moles.
an empty erlenmeyer flask that weighs 93.667g has a quantity of liquid vaporized in it at 96.4oc and a pressure of 1583.8 torr. the mass of the cooled flask is 94.345g. when the flask is filled with water, the mass of the flask and water is 268.92g. (a). determine the molecular weight of the unknown liquid. g/mol ** write answer in decimal form to one decimal place, no units in answer**
The question is not scientific as it measures weight with a unit of mass.
Mass of water filling the flask =268.92 g - 93.667 g = 175.25 g . Molecular weight of the flask = 175.25 g / (1.00 g/cm^3) = 284.4 cm^3.
A given molecule's mass, expressed in daltons, is known as its molecular mass. Because different isotopes of an element are present in different molecules of the same compound, their molecular masses can vary. The mass of a substance per mole is its molecular weight. Typically, grams per mole are used to measure this. Molecular weight, also known as molecular mass, is the mass of a substance's molecules, based on 12 as the carbon-12 atom's atomic weight. In real life, it is calculated by adding the atomic weights of the atoms in the compound's molecular formula. The properties of a polymer are inversely correlated with its molecular weight. Mechanical properties typically increase as the molecular weight does.
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when an oil sample analysis indicates elevated levels of silicon, which of the following should be inspected first?
Must first be inspected in oil sample analysis, low pressure intake circuit for leaks. Correct asnwer: letter C.
How does oil analysis help prevent engine damage?
Oil analysis helps prevent engine damage by identifying potential problems and addressing them before they cause major damage. By monitoring the health of your engine oil, you can avoid costly repairs and extend the life of your engine.
Some ways to prevent engine damage from occurring include:
Regularly changing your oilUsing the proper oil for your engineMaintaining proper engine operating temperaturesAdditionally, oil analysis can help identify potential problems early on, allowing you to take corrective action before major damage occurs.
The group of options with respect to the question, which of the following should be inspected first? Son:
A) Tribology
B) engine off, engine hot: syringe at mid-sump level
C) low pressure intake circuit for leaks
D) thick film and boundary
Correct answer: letter C.
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block
wood with blac
4. Find the density of a piece of wood with a mass of 50.0 grams and a volume of 100. cm³.
=2g/cm3
Will it float on water?
It float on water density= 2.27 g/ml.
What is density?
density is the mass of a material substance per unit volume. d = M/V, where d is density, M seems to be mass, and V is volume, is the formula for density. Grams per cubic centimetre are a common unit of measurement for density. For instance, while Earth has a density of 5.51 grammes per cubic centimetre, water has a density of 1 grammes per cubic centimetre. The unit of density is kilogrammes per cubic metre. For instance, air weighs 1.2 kilogrammes per cubic metre. In textbooks and manuals, the densities of typical solids, liquids, as well as gases are listed.
Density is considered an important factor in identifying a substance. Some examples of highly dense materials are iron and platinum.
As per the question
Density = mass /volume
The mass peice of sulphur= 227gm
Displaed in 50 ml of water .
Thus,
Density= 227 g/ (150-50) mL
= 2.27 g m/L
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which element may have more than eight valence electrons around it when present in a covalent compound?
Element may have more than eight valence electrons around it when present in a covalent compound is phosphorous
Valence electron are the electron located at the outermost shell of an atom and an atom like phosphorous or sulfur which has more than an octet is said to have expanded its valence shell and this can only occur when the valence shell has enough orbitals to accommodate the extra electron for example in the case of phosphorous the valence shell has a principle quantum number n = 3 and the maximum number of electron possible in the valence shell of the second row element is eight however the element of third row such as phosphorous and sulfur can form stable system by sharing eight or more electron
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compounds that contain both carbonyl and alcohol functional groups are often more stable as cyclic hemiacetals or cyclic acetals than as open-chain compounds. examples of several of these are shown. deduce the structure of the open-chain form of each
In chemical reactions, there are open-chain compounds and closed-chain compounds. (Answer look at the picture)
Open-chain compounds (Aliphatic) are carbonate compounds with chains that do not meet between ends, saturated or unsaturated both branched and unbranched.
Closed-chain compounds is a term in chemistry used for compounds whose atoms are joined together to form rings. The number of elements making up the ring varies and is more than three. The elements that make up the cycle are also different from the elements carbon (carbon cycle), elements other than carbon (inorganic cycle), or both (heterocyclics).
Cyclic compounds can be called aromatic if they meet several conditions, namely:
Fat structure.Have conjugated or alternating π bonds.The carbon atoms that make up the ring are sp3 hybridized.Follow Huackel's Rule.Learn more about open-chain compounds at https://brainly.com/question/12947948
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N2 gas is allowed to effuse through a porous membrane under constant pressure conditions. It takes 212 s for 1. 0 l of n2 gas to pass through the membrane. If it takes 337 s for 1. 0 l of an unknown gas to effuse through the membrane under identical conditions, what is the molar mass of the unknown gas?.
The molar mass of the unknown gas will be 70.75 g / mol.
What is graham law?
Graham's law states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight.
R1 / R2 = √ M2 / M1
= t2 / t1
Rn2/ R unknown = √ M unknown / Mn2
M unknown / 28gm/mol = t unknown / t N2
= 337 x 337 / 212 x 212 sec
= 337 x 337 x 28 / 212 x 218
= 70.75 gm / mol
The molar mass of the unknown gas will be 70.75 g / mol.
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Question 4 (1 point)
How many oxygens are present on the reactants side of this equation?
KCIO3 --> KCI + O₂
01
5
3
2
Oxygens are present on the reactants side of this equation is 3
Reactant is a substance that enters into and is altered in the course of a chemical reaction and the substance to the left of the arrow in a chemical equation are called reactant and a reactant is a substances that is present at the start of a chemical reaction and the substances to the right arrow are called product and a product is a substances that is present at end of chemical reaction
Here given reaction is
KCIO₃ → KCI + O₂
Here 3 oxygen atom are seen in the reactant so 3 oxygen atom are in the reactant side in the equation
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Explain how global winds would be affected if all areas of Earth received the
same amount of solar radiation.
Global winds would be affected if all areas of Earth received the same amount of solar radiation is the distribution of solar heating across the planet produce global wind pattern
The earth climate system depend entirely on the sun for its energy and solar radiation warm the atmosphere and fundamental to atmospheric composition and while the distribution of solar heating across the planet produces global wind pattern and contributes to the formation of clouds and storm and rainfall and scientist say that one percent decreases would lower earth means global temprature by more than degree kelvin and according to the model decrease in solar energy of loss than 10 percent could effectively freeze earth entire surfaces
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Consider the reaction
H2(g) + Cl2(g)2HCl(g)
Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 2.41 moles of H2(g) react at standard conditions.
S°surroundings = J/K
The value of Δ[tex]S^{o}[/tex] for the surrounding when 2.41 moles of [tex]H_{2}[/tex] gas react at standard condition is 48.2 J/K.
What is entropy change and how to calculate it for the given equation?Entropy change can be defined as the difference between the entropies of all the reactants and products multiplied by the corresponding number of moles for each.
Δ[tex]S_{rxn}[/tex] = Σ(n × [tex]S_{product}[/tex]) - Σ(n × [tex]S_{reactant}[/tex])
where, n = number of moles
For the given reaction:
[tex]H_{2}[/tex](g) + [tex]Cl_{2}[/tex](g) = [tex]2HCl[/tex](g)
The standard absolute entropies (S) are:
[tex]H_{2}[/tex] = 131 J/K .mole
[tex]Cl_{2}[/tex] = 223 J/K .mole
[tex]HCl[/tex] = 187 J/K .mole
On putting these values in above equation for calculating entropy change:
Δ[tex]S_{rxn}[/tex] = 2 × 187 - (131 + 223)
Δ[tex]S_{rxn}[/tex] = 374−131−223 = 20 J/K .mole
Entropy change of the surroundings when 1 mole of [tex]H_{2}[/tex] reacts = 20 J/K .mole
Now, when 2.41 moles of [tex]H_{2}[/tex] react, the entropy change of surrounding can be calculated as = 20 × 2.41 = 48.2 J/K
Therefore, the value of Δ[tex]S^{o}[/tex] when given moles of [tex]H_{2}[/tex] react is 48.2 J/K.
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based on the periodic table, which of the following groups of elements should have very similar chemical properties?
Groups of elements that should have very similar chemical properties are:
Lithium (Li)Sodium (Na)Potassium (K)Correct Answer: letter C.
This is because they are all in the same column of the periodic table.
What is the name of the column where these elements are located?This column is called the alkali metals. The alkali metals are the elements in group 1 of the periodic table. They are all very reactive, due to the fact that they only have one valence electron in their outermost energy level. This makes them very prone to losing that electron, which is why they are often found in compounds rather than in their pure form. The most common alkali metal is sodium, which is found in table salt.
Based on the periodic table, which of the following groups of elements should have very similar chemical properties?
Group of answer choices:
A. potassium (K), aluminum (Al), neon (Ne)
B. carbon (C), iodine (I), hydrogen (H)
C. lithium (Li), sodium (Na), potassium (K)
D. manganese (Mn), magnesium (Mg), molybdenum (Mo)
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what steps are necessary for finishing up a spectrophotometry experiment? select one or more: remove the sample from the sample chamber. throw out the cuvette. clean up around the spectrophotometer. turn off the light bulb.
Remove the sample from the sample chamber, turn off the light bulb and clean up around the spectrophotometer.
There are methods for determining the concentration of a sample. Here are our options. UV Photomedium The correct answer for the UV spectrum is all I need? This allows me to determine the concentration in the UV spectrum photometer. Absorption of visible light by compounds creates distinct spectra. Different spectrum is what it means. you can see what it looks like. Interaction bits are between light and matter. If a sample is given here and absorbs light, allowing an absorber to absorb it, a different spectrum will be seen.
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A crucible is a severe test or trial. It is also a vessel in which materials are melted at high temperatures to produce a more refined substance. What do you think a crucible might symbolize in this drama?.
In this drama, a crucible would represent the constant building action leading to the climax of the pot.
What is crucible?
A crucible is a ceramic as well as metal vessel used to melt metals or subject other substances to extremely high temperatures. Crucibles can be made from any material that can withstand temperatures high enough to melt and otherwise change their contents, despite historically being most frequently made of clay. The crucible's shape has changed over time, with designs that take into account both regional variation and the process for that they are used. The earliest crucible forms date to Iran and Eastern Europe in the sixth or fifth millennia B.C.
Similar to the contents of a crucible, the characters seem to be constantly enduring severe trials; in this case, the witching trials. The crucible would, in my opinion, symbolize the town itself and its residents. The symbolism of this suggests a theme of the townspeople going through the witching trials and coming out with a "refined" lesson. The unnecessary accusations and trials will teach a hard lesson to the people who live within the town and influence their future.
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S
Show how the total number of electrons for the third energy level can be determined by using the quantum numbers.
Use the paperclip button below to attach files.
Student can enter max 3000 characters
The element could be X is phosphorus .
What is element?
An element is the fundamental item that can't be easily broken onto smaller of pieces. In chemistry and physics, an elementary is a substance that can't be broken down by non-nuclear reactions. In computing and the mathematics, an element is the distinct piece of a larger system or set.
An ionic compound is formed by the ions, which their charges replaced, so the compound Na₂X is formed by the ions Na⁺ and X⁻². Thus, X must gain two electrons to be stable at the octet, so it has 6 valence electrons. Because it can accommodate up to 12 electrons, the element expands the octet, do it must be in the 3rd period or higher.
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What is the enthalpy change (in kJ) of a chemical reaction that raises the temperature of 250.0 mL of solution having a density of 1.25 g/mL by 2.40°C? (The specific heat of the solution is 3.74 J/g ⋅
⋅
K.)
The enthalpy change (in KJ) of the chemical reaction that raises the temperature of the solution by 2.40 °C is 8.976×10⁻³ KJ
How do I determin the enthalpy change?We'll begin by obtainig the mass of the solution. This can be obtained as follow:
Volume of solution = 250.0 mLDensity of solution = 1.25 g/mLMass of solution =?Mass = density × volume
Mass of solution = 1.25 × 250
Mass of solution = 312.5 g
Next, we shall determine the heat energy absorbed by the solution. This can be obataned as follow:
Mass of solution = 312.5 gChange in temperature (ΔT) = 2.40 °CSpecific heat capacity of solution (C) = 3.74 J/gºC Heat absorbed (Q) =?Q = MCΔT
Q = 312.5 × 3.74 × 2.4
Q = 2805 J
Finally, we shall detetrmine the enthalpy change. This can be obtained as follow:
Heat absorbed (Q) = 2805 J = 2805 / 1000 = 2.805 KJMass of solution (m) = 312.5 gEnthalpy change (ΔH) =?Q = m × ΔH
2.805 = 312.5 × ΔH
Divide both sides by 312.5
ΔH = 2.805 / 312.5
ΔH = 8.976×10⁻³ KJ
Thus, the enthalpy change is 8.976×10⁻³ KJ
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Calculate the average atomic mass of chromium, given the following percent abundances and isotope masses: 4.350 % 49.946 amu; 83.790% 51.941 amu; 9.500% 52.941 amu and 2.360% 53.939 amu
Asnwer: average atomic mass of chromium is 52amu
Calculations:
49.946amu: 4.350%= 0.0435
51.941amu: 83.790%= 0.8379
52.941amu: 9.500%= 0.095
53.939amu: 2.360%= 0.0236
Average atomic mass of chromium = 0.0435(49.946) + 0.8379(51.941) + 0.095(52.941) + 0.0236(53.939)
= 51.9963703amu
= 52 amu
when each formula unit of potassium carbonate, k2co3 , dissociates into ions in solution, there of the cation and of the anion.
From the formula unit potassium carbonate, there are two potassium ions and one carbonate ion.
The term formula unit refers to the smallest unit of an ionic compound. Indicates the ratio of ions in a compound. For potassium carbonate, the unit of the formula is K₂CO₃.
In recent years, potassium carbonate (K₂CO₃.) has been extensively employed as a mild base catalyst in several chemical processes, including Knoevenagel and Nitroaldol Condensation O-alkylation the production of 2H-chromenes , and monomethylation reactions
there fore, From this formula unit we can see that there are two potassium ions and one carbonate ion.
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Mode for O2!!!!!!!!!!!!!
Answer:
There are 2 modes in O2.
O2 is dioxygen.
Explanation:
Two oxygen atoms joined together for dioxygen.
Also, for reference, the prefix "di" means "two," "twice," or "double."
account for the regioselectivity and stereoselectivity observed when this compound is treated with in by drawing the product formed prior to a subsequent hydride reduction reaction. use wedge and hash bonds only when needed to show reaction stereochemistry. if the reaction produces a racemic mixture, just draw one stereoisomer. in your answer, draw the expanded structure for the acetyl group (ac).
Regioselectivity is the preference of chemical bonding or breaking in one direction over all other possible, stereospecific mechanism specifies the stereochemical outcome of a given reactant.
Regioselectivity occurs when two possible reaction products are regioisomers. Stereoselectivity exists when two possible reaction products are stereoisomers. Chemoselectivity occurs when a reactant within a substrate prefers one functional group over another. Markovnikov's law predicts the regiochemistry of his HX addition to unsymmetrically substituted alkenes.
The Zaitsev and Hoffman rule describes the principle of regioselectivity in elimination reactions. Regioselective means that the reaction selectively produces one regioisomer as the major product. The two alkenes are positional isomers because the double bonds are in different regions. A process that favors bond formation at certain atoms over other possible atoms.
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Ordinary hydrogen contains 99.30% of H atoms and 0.70% H atoms. Calculate the relative atomic mass of hydrogen.
The relative atomic mass of hydrogen 1.00
The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit
Here given data is
99.30% of H atoms
0.70% H atoms
So we have to calculate the relative atomic mass of hydrogen. = ?
So the relative atomic mass = (isotope abundance × isotope mass) + (isotope abundance × isotope mass)
Relative atomic mass = (99.30% × 1) + (0.70% × 1)
Relative atomic mass = 1.00
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methanol is fairly volatile and evaporates quickly if spilled. methanol is also absorbed quite readily through the skin. if, in the laboratory, methanol accidentally spilled on your clothing, why would it be a serious mistake to just let it evaporate?
Letting the evaporation of methanol will be a mistake due to its toxic nature.
Methanol belongs to the functional group alcohol. Being volatile, it evaporates quickly. Moreover, it also absorbed quickly through the skin. The compound is highly toxic and the intake should be completely avoided.
Some of the common problems associated with methanol toxicity are different organs like respiratory system, Central nervous system and cardiovascular system along with metabolic acidosis. The symptoms of methanol poisoning are CNS depression, headache, confusion, dizziness, failure in muscle coordination. The metabolism of methanol into formic acid results in end organ toxicity which may be lethal.
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What is the chemical formula for zinc (II) phosphate?
Zn3p2
Zn(PO4)
Zn3(PO4)2
Zn(NO3)2
Answer:
the correct answer is C.
Explanation:
Zn3(PO4)2 is the chemical formula for Zinc phosphate.
The chemical formula for zinc (II) phosphate is Zn₃(PO₄)₂. Therefore, option C is correct.
Zinc (II) phosphate is an inorganic compound. It is composed of zinc cations (Zn²⁺) and phosphate anions (PO₄³⁻). The Roman numeral "II" in the compound name indicates that the oxidation state of the zinc ion is +2.
Zinc (II) phosphate is a white crystalline solid that is insoluble in water. It is commonly used in various applications, including as a corrosion inhibitor in coatings and paints, as a component in dental cement, and as a nutrient supplement in some fertilizers.
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