It is important to clean our glass ware immediately after use for a few reasons. Firstly, if left unwashed, the residue left behind by drinks or food can become stubborn stains that are difficult to remove.
This can lead to a build-up of grime and bacteria that could be harmful to our health. Secondly, cleaning glassware immediately after use prevents any odors or flavors from lingering and contaminating the next drink or food that is served in the glass. This is especially important in the case of wine glasses, where any residual wine left in the glass can mix with the next wine and alter its taste. Finally, cleaning glassware immediately after use helps to maintain the integrity of the glass itself. Over time, dirt and grime can cause scratches and weaken the glass, reducing its lifespan. By cleaning glassware immediately after use, we can ensure that it remains in good condition and is able to serve us well for a long time. Therefore, it is always best to clean glassware immediately after use to maintain its cleanliness, prevent contamination, and preserve its quality.
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Don’t delete comment or I’ll report
Answer:
The molar mass of O is 16 g/mol and since we have 2 oxygen molecules we multiply 16 g/mol to get 32 g/mol. Therefore our best option would be option C, 32 g/mol.
what will be the result of the reaction
(CH3COO)2+redP +Cl2
Answer:
(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl
Explanation:
This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.
If water’s density is 1.0 g/mL, then would the perfume be more or less dense than water? Would the perfume float on top or sink to the bottom of the water?
Help me out rq!!!!!
Answer:
usually the perfumes are made of aromatic hydrocarbons invloving
cetone, ethanol, benzaldehyde, formaldehyde, limonene, methylene chloride, camphor, ethyl acetate, linalool and benzyl alcohol. which have density lower than the water hence they will float on the top of the water.
Hope this helps you
Explanation:
How much heat, in joules, is required to raise the temperature of 8.2 g of
water by 3.32°C? (Specific heat of water is 4.18 J/gºC) Your answer should be
rounded to one number after the decimal and does not need units; Example
0.1*
Answer:
113.8 J.
Explanation:
The following data were obtained from the question:
Mass (M) = 8.2 g
Change in temperature (ΔT) = 3.32 °C
Specific heat capacity (C) = 4.18 J/gºC
Heat required (Q) =..?
The heat required to raise the temperature of the water by 3.32 °C
can be obtained as follow:
Q = MCΔT
Q = 8.2 × 4.18 × 3.32
Q = 113.8 J
Therefore, the amount of heat required to raise the temperature of the water is 113.8 J.
Please help me ..If you don't have a question or something to say just comment don't steal my points . It's not fair. Here are the questions:
1.
\(1.20 \: mol \times \frac{6.02 \times {10}^{23} }{1 \: mol} = 7.224 \times {10}^{23} atoms\)
2.
\(9.25 \times {10}^{25 \:} molecules \times \frac{1 \: mol}{6.02 \times {10}^{23} } \)
\( = 153.654485 \: moles\)
3.
molar mass = 3(24.31) + 127.60 + 5(32.07)
molar mass = 360.88 g
4.
molar mass = 3(58.93) + 2(30.97) + 8(16.00)
molar mass = 366.73 g
5.
molar mass = 98.09
\(125 \: g \times \frac{1 \: mol}{98.09 \: g} = 1.274339892 \: moles\)
//
I'm too lazy to do the rest but you should get a general idea of how to do it.
Also, round as you wish!
Ayo, thanks for my points
can i get help with this dont really get it
Answer:
Number 2 is Direction
Explanation:
The old answer for number four was incorrect
I apologize for the inconvenience but I do not have an answer that fits in the lines for number 4
All stoichiometry calculations involve what important step?
metric fraction
molar mass fraction
molecules fraction
mole ratio fraction
DONE
Answer:
Mole Ratio Fraction
Explanation:
That's the answer.......
Answer:
DExplanation:
Mole Ratio Fraction
Part A If the theoretical yield of the reaction below corresponds to 24.9 g and the actual yield was 20.4g, calculate the percent yield. Given: Li, O+H2O +2LOH O 45.0 % O 81.9 % O 71.8% O 16.0 %
The percent yield for this reaction is 81.9%.
To calculate the percent yield, we need to use the following formula:
Percent yield = (actual yield / theoretical yield) x 100
We are given that the theoretical yield is 24.9 g and the actual yield is 20.4 g. Plugging these values into the formula, we get:
Percent yield = (20.4 / 24.9) x 100
Percent yield = 81.9%
It is important to note that the percent yield is a measure of the efficiency of a reaction. A high percent yield indicates that a large percentage of the reactants were converted into products, whereas a low percent yield suggests that some of the reactants were lost or that side reactions occurred. In this case, a percent yield of 81.9% indicates that the reaction was fairly efficient and that most of the reactants were converted into products. However, it is still important to consider why the actual yield was lower than the theoretical yield and to optimize the reaction conditions to improve the yield in future experiments.
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KClO₃ → Kelt Oz
1. Potassium chlorate is decomposed to form potassium chloride and oxygen gas. How many
moles of potassium chlorate are needed to produce 7.8 moles of oxygen?
Answer:
5.2 moles of KClO₃ are needed
Explanation:
Given data:
Number of moles of potassium chlorate needed = ?
Number of moles of O₂ formed = 7.8 mol
Solution:
Chemical equation:
2KClO₃ → 2KCl + 3O₂
now we will compare the moles of KClO₃ and O₂.
O₂ : KClO₃
3 : 2
7.8 : 2/3×7.8 = 5.2
5.2 moles of KClO₃ are needed.
How many moles are in NaOH after being boiled?
No, it's a bad idea to boil NaOH in a beaker. Even a dilute solution of NaOH will attack and etch glass at its boiling point.
What happens when you boil NaOH?When boiling NaOH, the solid dihydrate might melt straightly into a solution at 13.35 °C; however, boiling once the temperature exceeds 12.58 °C. it often decays into a solid monohydrate and a liquid solution. As it boils it will get more concerted and the NaOH corrosive effect will concentrate on a smaller top area. The solution may splatter or boil. Here is how to build a sodium boiling hydroxide solution safely, along with recipes for several common.
The dissolution of NaOH sodium hydroxide in water is conducted by the release of an amount of heat because the solvation of hydroxide ions and sodium ions is most exothermic. Solvation is the NaOH proceed by which ions in a solid boiling dissociate from each other and interact with water molecules.
So we can conclude that The solubilization curve tends to boil to carry lower NaOH concentration with the increase in temperature
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In a sealed and rigid container, a sample of gas at 2.60 atm and 25.0 °C is heated to 50.0 °C. What is the pressure (in atm) of the gas at 50.0 °C?
The mathematical formula for the gas pressure (in atm) at 50.0 °C is P2= 2.17 atm.
Is tobacco use a gas?Under normal temperatures and pressures, substances that are totally in a gaseous state are referred to be gases. Certain solids or liquids have an accompanying gaseous phase known as a vapour. Smoke is a thin solid that results from insufficient burning.
Why are gas prices in the US rising?The price hike is attributed by AAA to an increase in fuel demand. "Pump prices have risen as a result of increased gas demand and limited supplies. Drivers will probably continue to experience pump price increases if demand grows "in line with AAA.
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Both the Heisenberg uncertainty principle and the Schrödinger wave equation
Selected Answer:
Answers:
a. led to locating an electron in an atom.
b. are based on Bohr's theory.
c. treat electrons as particles.
d. led to the concept of atomic orbitals.
Both the Heisenberg uncertainty principle and the Schrödinger wave equation led to the concept of atomic orbitals, hence option D is correct.
The Heisenberg uncertainty principle claimed that it was impossible to know an electron's position and velocity at the same time. It gave rise to the notion that an electron would follow an orbital path, along which a general area could be identified.
It is defined as the presumption that a classical ensemble is susceptible to random momentum fluctuations of a strength that is dictated by and scales inversely with uncertainty in position.
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how many ionic bonds are in copper?
The number of ionic bond in copper is zero.
Pure copper or any pure metal for that matter are examples of metallic bonds, which are neither ionic nor covalent. The copper atoms are stacked very tightly in a solid lattice. In fact it has a face centered cubic lattice which is the closed packing of atoms possible. Each atom has twelve nearest neighbors which allows their 4s orbitals (mostly) to have the optimal overlap. All of these orbitals therefore combine in one gigantic band of delocalized orbitals that spans the entire crystal with its myriad atoms. This band is only partly filled and the difference in energy between one state and the next is puny, which explains copper’s outstanding conductive properties.
Therefore, the bonding in copper has a metallic character.
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The electron configurations of some elements are given. based on the electron configurations, which elements can likely form ions with multiple charges?
Correct option:
The elements form ions with multiple charges is given by option B and D, i.e., Iron and Cobalt
The electronic configurations of elements(assumed):
\(A. \,Zinc\,-[Ar]\,3d^{10}4s^{2}\\\\B.\,Iron\,-[Ar]3d^64s^2\\\\C.\, Sodium\, [Ne]3s^1\\\\D.\,Cobalt\,[Ar]3d^74s^2\\\\E.\,Silver\,[Kr]4d^{10}5s^1\)
These electronic configurations are based many factors-
1. (n+l) energy rule which states higher the value of (n+l), higher will be the energy of the orbital.
2. Fully filled and half filled orbitals are more stable than partially filled orbitals.
Now,
Elements of d-block have multiple oxidation states. Zinc has fully filled d-orbitals. It is not considered as d-block metal as it has only 1 oxidation state, i.e, +2.
Sodium exists only in +1 oxidation state.
Also Silver exists in +1 oxidation state.
So, the correct answer is Iron and Cobalt which can form ions with multiple charges.
Correct options are B and D.
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Do you think a battery system has energy? Explain why.
Answer:
A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.
Explanation:
Electromagnetic waves can be used to transmit information over great distances. For many years, radio waves have been used to transmit AM and FM radio signals. Wi-fi systems, a newer technology, normally use radio waves that have much higher frequencies than those used by AM and FM radio. Which want or need is most likely met by this newer wave technology?
O A. To safely store information for long periods of time
O B. To send information over long distances
O C. To send information using sound waves instead of radio waves
O D. To transmit more information in a shorter time
The newer wave technology of Wi-Fi systems, which uses radio waves with higher frequencies than those used by AM and FM radio, is most likely used to transmit more information in a shorter time, which is option D.
Higher frequency waves have shorter wavelengths, which means they can carry more information in a given amount of time. Wi-Fi systems use higher frequency radio waves than AM and FM radio, allowing them to transmit more data over a shorter period of time.
This is why Wi-Fi is able to provide high-speed internet access and support streaming of videos, music, and other multimedia content.
Option A, to safely store information for long periods of time, is not directly related to electromagnetic wave technology, as this is more related to data storage technology, such as hard drives, solid-state drives, and other forms of non-volatile memory.
Option B, to send information over long distances, is a capability of all electromagnetic waves, including AM and FM radio waves, as well as Wi-Fi waves. However, the specific frequencies and technologies used may vary depending on the requirements of the application.
Option C, to send information using sound waves instead of radio waves, is not relevant to Wi-Fi technology, as sound waves are not used for wireless communication. Sound waves are mechanical waves that require a medium, such as air or water, to travel through, while electromagnetic waves can travel through a vacuum, such as space.
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As a team, determine the rules for naming binary ionic compounds that have a "special" transition metal in it when given the formula.
Answer:
Metal name (charge in roman numerals) Non metal
for example Iron (III) chloride
Explanation:
The rule for naming special transition metal are as follows -
a) First name the transition metal
b) Now write the name of the non metal in the chemical formula.
c) Write the charge for the non metal.
d) If there is a polyatomic ion, write the Common Ion Table ,its formula and charge.
e) Based on the total charge on the non-metal or polyatomic ion, deduce the total charge on the transition metal
f) Write the charge of transition metal after the name of metal in Roman Numeral in parentheses
Increasing the temperature of an endothermic reaction results in ____
· more reactants and products.
· no change in the quantities of reactants and products.
· more reactants and fewer products.
· fewer reactants and products.
· more products and fewer reactants.
Answer:
more reactents and products
What was the scientific basis for the unit amu
What is the electrical charge on the nucleus of a carbon-12 atom
Answer:
Neutral carbon-12 (or any carbon atom) has 6 electrons with a total negative charge of 6e- orbiting a nucleus with a total positive charge of 6e+, so that the total net charge is zero. The nucleus is made up of 6 protons, each with a positive charge of e+, and 6 neutrons, each with zero charge.
Explanation:
Answer:
Neutral Carbon-12 Atom
long-chain molecules that consist of many repeating units are called
The long-chain molecules that consist of many repeating units are called polymers. Polymers are large macromolecules composed of monomer units that are chemically bonded together in a repetitive pattern.
The repeating units, also known as monomers, are linked through covalent bonds, creating a chain-like structure.
Polymers can have various sizes and complexity, ranging from simple structures like polyethylene to highly intricate and specialized macromolecules like proteins and DNA.
It is noticed that due to their repeating nature, polymers often possess unique physical and chemical properties, making them useful in a wide range of applications, including plastics, textiles, adhesives, and biomedical materials.
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How many moles of gas are in a 30 liter scuba canister if the temperature
of the canister is 300 K and the pressure is 200 atmospheres?
Answer: the answer is n= 0.487 mol
Explanation: i took the test and got it right
The molar mass of calcium hydroxide, Ca(OH)2, is 74.10 g/mole 58.09 g/mole 57.09 g/mole 54.02 g/mole r 114.2 g/mole How many moles of K SO4 are in 15.0 g of KSO.? 0.119moles 0.0861 moles 0.111 moles 2.61 x 103 moles 0.172 moles How many grams of glucose (CeH120s) are in 3.55 moles of glucose? 180. g 426 g 103 g 640. g 507 g
The molar mass of calcium hydroxide, Ca(OH)₂ is 74.10 g/mol. The moles of the K₂SO₄ is 0.086 mol . The grams of the glucose is 639 g.
The molar mass of the Calcium oxide , Ca(OH)₂ is :
Ca(OH)₂ = 40 + 2( 15.99 + 1 )
= 74.10 g/mol
The moles of the K₂SO₄ in the 15 g of the K₂SO₄ :
Moles = mass / molar mass
Moles = 15 / 174.25
Moles = 0.086 mol
The moles of the glucose, C₆H₁₂O₆ = 3.55 mol
The mass of the glucose = moles × molar mass
= 3.55 × 180
= 639 g
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which of the following radioactive isotopes would be best for age-dating a rock from 50,000 years ago?
The best radioactive isotope for age-dating a rock from 50,000 years ago would be Carbon-14 (14C).
Carbon-14 (14C) is the most suitable radioactive isotope for dating materials up to approximately 50,000 years old, making it ideal for age-dating a rock from 50,000 years ago. This is because 14C is formed in the upper atmosphere when cosmic rays interact with nitrogen, and it is incorporated into living organisms through photosynthesis or consumption. After an organism dies, the 14C begins to decay at a known rate, known as the half-life, which is approximately 5730 years. By measuring the remaining amount of 14C in a sample, scientists can determine how long it has been since the organism died and, therefore, date the rock or material containing organic matter to estimate its age. Other radioactive isotopes with longer half-lives, such as Uranium-238 or Potassium-40, are better suited for dating much older rocks or minerals.
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Which equation correctly shows how you could calculate [OH–] from [H+]? StartBracket upper O upper H superscript minus EndBracket equals StartFraction 1.0 times 10 to the negative 14 power over StartBracket upper H superscript plus EndBracket EndFraction. StartBracket upper H superscript plus EndBracket equals StartFraction 1.0 x 10 to the negative 14 power over StartBracket upper O upper H superscript negative EndBracket EndFraction.
The StartBracket upper O upper H superscript minus EndBracket equals StartFraction equation [OH-] = 1.0 x \(10^_-14\)/ [H+] is used to calculate [OH-] from [H+]. It is derived from the ion product constant for water.
The condition that accurately demonstrates the way that you could work out [OH-] from [H+] is:
[Goodness ] = 1.0 x \(10^_-14\)/[H+]
This condition is gotten from the particle item consistent for water, which is:
Kw = [H+][OH-] = 1.0 x \(10^_-14\)
At 25°C, the convergence of H+ and Gracious in unadulterated water are equivalent and each is equivalent to 1.0 x\(10^_-7\) mol/L. In this way, the pH of unadulterated water is 7.
On the off chance that the grouping of H+ in an answer is known, the centralization of Goodness can be determined involving the particle item consistent for water and reworking the condition to settle for [OH-]. This is on the grounds that the convergence of H+ and Goodness are conversely relative to one another.
Assuming the pH of the arrangement is known, the grouping of H+ can be determined utilizing the condition:
pH = - log[H+]
and afterward subbed into the situation to ascertain [OH-].
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Potassium metal reacts with chlorine gas to form solid potassium chloride. Answer the following:
Write a balanced chemical equation (include states of matter)
Classify the type of reaction as combination, decomposition, single replacement, double replacement, or combustion
If you initially started with 78 g of potassium and 71 grams of chlorine then determine the mass of potassium chloride produced.
The balanced chemical equation between pottasium and chlorine is as follows: 2K + Cl₂ → 2KCl. It is a combination reaction.
What is a chemical reaction?A chemical reaction is a process, typically involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.
According to this question, a chemical reaction occurs between potassium metal and chlorine gas to form pottasium chloride as follows:
2K + Cl₂ → 2KCl
The chemical reaction is a combination reaction because it involves the combination of two elements to form a compound.
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Write TRUE if the statement is correct and FALSE if the statement is wrong.
___1.Heat depends only on how fast molecules vibrate. ___2.Joule is a unit of heat energy
___3.We measure temperature with a thermometer
___4.The faster molecules vibrate; the more heat they give off.
___5.Temperature measures the average kinetic energy per molecule.
Answer:
true is the answer of first
A solution containing which one of the following pairs of substances will be a buffer solution? A solution containing which one of the following pairs of substances will be a buffer solution? AgBr, HBr CuCl, HCl CsI, HI KI, HI none of the above
Which of the halves that of compounds will make up the buffer solution in a solution Any of the halves that of substances, when present in a solution, will make it a buffer solution None of the above.
What exactly is a buffer solution?As a result, it's essential to have liquids whose pH doesn't really alter even when strong alkalies nor strong acids are added. These are referred to as buffer solutions. The ability of a buffer to withstand a change in pH is known as buffer capacity.
What makes it a buffer solution?it can neutralize a small amount of additional acid or base, the pH of the liquid is kept comparatively steady.
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What happens to valence electrons in ionic bonding?
Answer:
they are either donated to or taken by another atom to achieve octet arrangement
Explanation:
for example Na+ and Cl- .. they both have one extra and one less electron .
so they donate and receive one electron to/from each other to achieve the octet arrangement ..
Calculate the ph of a 0. 369 m solution of carbonic acid, for which the ka1 value is 4. 50 x 10-7
Therefore, the pH of a 0.369 M solution of carbonic acid is approximately 5.91.
To calculate the pH of a solution of carbonic acid (H2CO3), we need to consider the dissociation of carbonic acid and the equilibrium expression for its ionization.
The dissociation of carbonic acid can be represented as follows:
H2CO3 ⇌ H+ + HCO3-
The equilibrium expression for this dissociation is:
Ka1 = [H+][HCO3-]/[H2CO3]
Given that the Ka1 value for carbonic acid is 4.50 x 10^-7, we can set up an ICE (Initial, Change, Equilibrium) table to determine the concentration of H+ in the solution.
Let's assume x mol/L is the concentration of H+.
H2CO3 ⇌ H+ + HCO3-
Initial: 0 0 0.369 M
Change: -x +x +x
Equilibrium: 0 x 0.369 + x
Using the equilibrium expression, we can write:
4.50 x 10^-7 = (x)(0.369 + x)
Since the value of x is much smaller compared to 0.369, we can assume that x is negligible in comparison and simplify the equation:
4.50 x 10^-7 ≈ (x)(0.369)
Solving this equation for x gives:
x ≈ 4.50 x 10^-7 / 0.369
x ≈ 1.22 x 10^-6
The concentration of H+ in the solution is approximately 1.22 x 10^-6 M.
To calculate the pH of the solution, we use the equation:
pH = -log[H+]
pH = -log(1.22 x 10^-6)
pH ≈ 5.91
Therefore, the pH of a 0.369 M solution of carbonic acid is approximately 5.91.
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