In order to remedy this potentially hazardous situation of Hydrochloric acid option b. put some sodium bicarbonate on the gloves so they can be neutralized.
Hydrochloric acid, additionally known as muriatic acid, is an aqueous answer of hydrogen chloride. it's far a drab answer with a distinctively smelly odor. it's far categorized as a robust acid. It is a part of gastric acid in the digestive structures of maximum animal species, which include human beings.
Hydrochloric acid (HCl) is generally used for the neutralization of alkaline marketers, as a bleaching agent, in the food, textile, metallic, and rubber industries. it's far neutralized if launched into the soil and it rapidly hydrolyzes while exposed to water.
Hydrochloric acid is a clean, toxic liquid. it is a caustic chemical and notably corrosive, which means it right away reasons severe damage to tissues, such as burning, on touch. this text discusses poisoning from swallowing or breathing in hydrochloric acid.
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Disclaimer:- your question is incomplete, please see below for the complete question.
The hydrochloric acid utilized in this experiment can often discolor gloves if it is spilled on them during use. If this does occur, what should be done in order to remedy this potentially hazardous situation?
a. Gloves are not needed in this experiment, this question is invalid.
b. put some sodium bicarbonate on the gloves so they can be neutralized.
c. Remove the glove and wash your hand prior to putting a new pair on.
d. wash the gloves off and continue to use them.
a lab assistant has asked to dissolved 18.4 g of hcl is added in 662 ml of water. what is the ph of resulting solution. (assume that the volume remains constant.)
The pH value of the resulting solution is 11.9.
To calculate the pH value of the solution we need to calculate the molarity (c) of the solution, using the number of moles of HCl (n) and the volume of the solution (V = 662 mL = 0.662 L).
c = n/V
To obtain the number of moles of HCl, we are going to use the mass of HCl (m = 18.4 g) and its molar mass (M = 36.5 g/mol):
n = m/M
n = 18.4 g / 36.5 g/mol
n = 0.504 mol
Now we can calculate the molarity:
c = 0.504 mol / 0.662 L
c = 0.761 M
Because HCl is a monoprotic acid, the molarity of the solution is equal to the concentration of H⁺ ions ([H⁺] = 0.761 M), which is important for calculating pH:
pH = -log[H⁺]
pH = -log(0.761)
pH = 11.9
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a sample of 4.50g of methane occupies 12.7dm3 at 310k. (i) calculate the work done when the gas expands isothermally against a constant external pressure of 200torr until its volume has increased by 3.3dm3 . (ii) calculate the work that would be done if the same expansion occurred reversibly
(a) The work done when the gas expands isothermally against a constant external pressure is 87.992 kJ
(b) The work that would be done if the same expansion occurred reversibly is 167.4 J
Given that the mass of methane m is = 4.5 gram = 0.0045 kg
Volume occupies [tex]V_{1}[/tex] = [tex]12.7dm^{3}[/tex]
And volume is increased by [tex]3.3dm^{3}[/tex]
So, the increased volume [tex]V_{2}[/tex] is
12.7 + 3.3 = 16 litres
Given temperature T is 310K
Pressure is given as 210 Torr = 26664.5 Pa
(a) Now, at the given pressure the work done is given by
W = P( [tex]V_{2}[/tex] - [tex]V_{1}[/tex])
W = 26664.5 (16 - 12.7)
W = 87992.85 J
W = 87.992 kJ
(b) At reversible process work done is given by
W = nRT㏑[tex]\frac{V2}{V1}[/tex]
We have the given mass = 4.5 gram
Molar mass of methane = 16
So number of moles is
n = Mass in gram / Molar Mass
n = 4.5 / 16
n = 0.28125
So, work done is
W = 0.28125 × 8.314 × nRT㏑[tex]\frac{16}{12.7}[/tex]
W = 167.4 J
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At standard temperature and pressure, a 0. 50 mol sample of h2 gas and a separate 1. 0 mol sample of o2 gas have the same.
0.50 mol of H₂ and 1.0 mol of O₂ have the same average molecular kinetic energy at standard temperature and pressure
Mass of H₂ and O₂ can be found by the formula given below;
m=n × M
mass of H₂= 0.50 × 2= 1g
mass of O₂=1.0 ×16= 16g
The formula to find average kinetic energy is as follows
K=[tex]\frac{3}{2}[/tex]K[tex]B}[/tex]T where K[tex]{B}[/tex]= Boltzmann constant
According to the conditions given above i.e standard temperature and pressure.
K∝T
So it is independent of the quantity of the sample i.e how much the amount of sample is present.
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The diagram shows one period of the Periodic Table. Li ,Be ,B , C,N,O,F,Ne .Which two elements form acidic oxides?
A -carbon and lithium
B -carbon and neon
C- carbon and nitrogen
D-nitrogen and neon
Answer:
A -carbon and lithium.
Explanation:
Carbon and lithium are two elements form acidic oxides.
What are Acidic oxides?One or more oxygen atoms are joined with another element to form a chemical molecule known as an oxide (for instance, Li2O).
The term "oxide" refers to a binary compound containing oxygen and another element, such as CO2, SO2, CaO, CO, ZnO, BaO2, and water. Because oxygen is combined with just one other element in these substances, they are referred to as oxides. Oxides are divided into acidic, basic, amphoteric, and neutral categories based on their acid-base properties:
An oxide is referred to as acidic if it reacts with water to form an acid. A basic oxide is an oxide that produces a base in water. A substance that can chemically react as either an acid or a base is called an amphoteric solution.
Therefore, Carbon and lithium are two elements form acidic oxides.
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which of these is not a product of the nuclear reactions inside the sun known as the proton-proton chain? helium nuclei polycyclic aromatic hydrocarbon molecules antimatter (positrons) neutrinos
The fusion of hydrogen nuclei into helium nuclei in the solar core is how the Sun obtains its energy. The proton-proton chain, a series of nuclear fusion processes, describes this hydrogen burning.
Protons, which are just single hydrogen atoms, are the starting point of this process inside the sun. Through a series of stages, these protons fuse together to form helium. This fusion process takes place in the sun's core, and the energy released as a result of transmutation maintains the sun's hot.
A deuterium (2H) nucleus is created from two protons in the first step of the hydrogen fusion process, along with an antielectron and a neutrino.
Four hydrogen protons and two electrons are used in the basic hydrogen fusion cycle, which results in the creation of a helium nucleus, two neutrinos, and six photons.
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while performing a neutralization reaction, jonna added 23.61 ml of 0.120 m h2so4 to 48.16 ml of 0.309 m koh. what concentration of oh-, in m, that is unreacted in the solution after the neutralization is complete?
0.00925 moles OR 9.25103 moles of OH remain unreacted in the solution after the neutralization process is finished.
What are neutralization reactions?In a neutralization reaction, an acid and a base mix chemically to yield salt and water as the final products. During a neutralization process, H+ and OH- ions interact to produce water.
The balanced chemical equation is
H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O
Now determine the number of moles
For H₂SO₄
Volume = 23.61 mL = 0.02361L
Concentration = 0.120M
From the formula,
Number of moles = Concentration × Volume
∴ Number of moles of H₂SO₄ = 0.120 × 0.02361
Number of moles of H₂SO₄ = 0.0028332 moles
For KOH
Volume =mL = 48.16ml = 0.04816 L
Concentration = 0.309 M
∴ Number of moles of KOH = 0.309 × 0.04816
Number of moles of KOH = 0.01488144 moles
From the equation of reaction,
0.0028332 moles of H₂SO₄ will neutralize 2× 0.0028332moles KOH
2× 0.0028332 = 0.0056664 moles
This means only 0.0056664 moles of KOH reacted
The amount of unreacted OH moles will now be discussed.
Number of unreacted OH moles equals the total number of OH moles at the start of the reaction. Quantity of OH that reacted in moles
∴ Number of moles of unreacted OH⁻ = 0.01488144 moles - 0.0056664 moles
Number of moles of unreacted OH⁻ ≅ 0.00925 moles OR 9.25×10⁻³ moles
Hence, the number of moles of OH⁻ that are unreacted in the solution after the neutralization is complete is 0.00925 moles OR moles 9.25×10⁻³.
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when 20 grams of a salt is dissolved in 95 grams of water, the temperature of the solution decreases from 40oc to 0oc. how much heat is absorbed? the specific heat of the solution is 1.1 cal/goc.
When 20 grams of a salt is dissolved in 95 grams of water, the temperature of the solution decreases from 40oc to 0oc. 880 calories heat is absorbed, the Specific Heat of the solution is 1.1 Cal/goc.
delta t = T f - T i
= 0 - 40
= -40 degrees Celsius
c = 1.1 Cal/g degrees Celsius
m = 20 grams
heat absorbed (q) = mc(delta)t
q = 20 * 1.1 * -40 degrees Celsius
q = 880 Cal
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When you put aspirated spinach leaf disks in a beaker of sodium bicarbonate and place them in different colors of light, some disks float faster & more abundantly than others dependent on what color, if any, they were in. What made them able to float?.
The release of O₂( oxygen gas) from the process of photosynthesis is made disks to be able to float.
What is Photosynthesis?Photosynthesis can be described as the process in which green plants manufacture their food in the presence of sunlight which is trapped by the chlorophyll of the leaves. They are also called primary producers and they use compounds such as water and carbon dioxide.
The spinach leaf disks intake carbon dioxide from a sodium bicarbonate solution and sink to the bottom of a beaker. When the beaker is exposed to light, the disks use carbon dioxide gas and water to produce oxygen gas and glucose. Oxygen gas released from the leaves due to photosynthesis forms tiny bubbles that make the leaves float.
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when GPR resin is setting, it gets hot
What type of reaction is this (exothermic or endothermic) and why?
What has happened in terms of energy transfer?
When GPR resin is setting, it gets hot. The type of reaction is this (exothermic or endothermic) is endothermic reaction. In terms of energy transfer energy is absorbed from its surrounding in form of heat.
Endothermic reaction occurs when heat is absorbed by the system from surrounding. while Exothermic reaction occurs when heat is released by the system in surrounding. In endothermic reaction , the system absorbed the energy from its surrounding in the form of heat.
Thus, When GPR resin is setting, it gets hot. The type of reaction is this (exothermic or endothermic) is endothermic reaction. In terms of energy transfer energy is absorbed from its surrounding in form of heat.
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PLEAASE HELP
Solid aluminum reacts with aqueous zinc bromide to form solid zinc and aqueous aluminum bromide .
Write a balanced chemical equation for this reaction.
Beryllium, the first element in group 2, has an atomic number of 4. The second element in this group has an atomic number of?.
Beryllium exists in Group 2 (Column 2) with the atomic number 4.
The atomic number of the next element in the group would be right below it, Magnesium (Mg). Magnesium contains the atomic number 12.
What is meant by atomic number?The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number. This is the number of protons present in the nucleus of each atom of that element, or the proton number, for conventional nuclei. Ordinary chemical elements can be uniquely identified by their atomic number.
The number of protons in an atom determines its atomic number, and isotopes have the same atomic number but different numbers of neutrons.
Beryllium exists in Group 2 (Column 2) with the atomic number 4.
The atomic number of the next element in the group would be right below it, Magnesium (Mg). Magnesium contains the atomic number 12.
The atomic number is the small number on the top left corner of the square of the element.
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suppose there is a gaseous mixture of nitrogen and oxygen. if the total pressure of the mixture is 490 mmhg , and the partial pressure of nitrogen is 210 mmhg , calculate the partial pressure of oxygen in the mixture using dalton's law.
The partial pressure of Oxygen in the mixture is 280 mmHg.
The Sum of the partial pressure of elements in a solution equals the total pressure of the mixture as stated by Dalton's Law.
Total pressure = Partial pressure of Nitrogen + Partial pressure of Oxygen
P' = P₁ + P₂
The partial pressure is the pressure that each gas would exert if it alone occupied the volume of the mixture at the same temperature.
The system responds to changes in pressure, temperature, and chemical composition, phases may be created, eliminated, or altered in composition.
∴ 490 = 210 + P ₂
P₂ = 280 mm of Hg
Hence, the partial pressure of oxygen gas is 280 mm Hg.
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Al + Pb(NO3)2 -------------------------------> ? fasttttttttttttttttt
4Al + 2Pb(No3)2 → 4Al(No3) + Pb2
Hope this helps!
order the steps to show how energy is trranformed in plant cells
Solar energy is converted into chemical energy i.e. glucose with the help of photosynthesis.
What is photosynthesis?Photosynthesis is the process in which light energy is converted to chemical energy in plant cells. In cellular respiration, plants use the chemical energy that is stored during the process of photosynthesis. Photosynthesis is a process in which plants convert energy from the sun into usable energy that is used by the cells in different activities. Plants use the light energy of the sun, carbon dioxide, and water to make glucose and oxygen. The glucose is stored in different parts of the plant while on the other hand, the oxygen is released in the atmosphere.
So we can conclude that with the help of the photosynthesis process, Solar energy is converted into chemical energy.
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Why does Radium have a lower ionization energy than Barium
Radium have a lower ionization energy than Barium because electrons are closer to the nucleus
What is ionization energy?
Ionization energy can be simply stated as a measurement of an atom's or ion's inclination to give up an electron or of how challenging it is to remove an electron from them. An electron is often lost when a chemical species is in its ground state.
The atom displays a smaller radius than anticipated and the s electrons are more challenging to expel because these electrons are located nearer the nucleus. The first ionization enthalpy of Radium is higher than that of Barium.
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How does a coyote producer consumer decomposer
A coyote is a species considered as a consumer in the food chain because they need to eat other live organisms to survive (Option 2).
What is the role of a consumer in the food chain?The role of consumers in the food chain is to eat other organisms such as plants (in the case of herbivore consumers) or meat (in the case of carnivore consumers). Coyote is a carnivore consumer.
Therefore, with this data, we can see that the role of a consumer in the food chain is to consume (eat) other organisms.
Complete question:
Choose the correct option. A coyote is a ____ producer, consumer, decomposer.
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how do we know the amount of electrons that an element has?
I need help
Answer:
The easiest way to find the number of neutrons, protons, or electrons is to look at the element's atomic number on the periodic table, that number is equal to the number of protons. Which is equal to the number of electrons unless there's an ion superscript listed after the element.
Explanation:
Have a great rest of your day
The one and only,
-Mr. Universe
Need this done by 10:20
An instructor has a jar of sulfur that contains 16 grams. The students are asked how many sulfur atoms are in the jar. Four students give the following responses:
Arlo says, "There are 1/2 times Avogadro's number of sulfur atoms in the jar."
Bob says, "There are sixteen sulfur atoms in the jar."
Celine says, "There are two times Avogadro's number of atoms in the jar."
Delbert says, "There are sixteen times Avogardro's number of atoms in the jar."
With which, if any, of these three students do you agree:
Arlo,
Bob,
Celine,
Delbert, or
I don't think any of these students are correct
The student with the correct statement is Arlo.
How to determine the number of atomsFirst, we shall determine the mole of sulphur in the jar. This can be obtained as follow:
Mass of sulphur = 16 gramsMolar mass of sulphur = 32 g/moleMole of sulphur =?Mole = mass / molar
Mole of sulphur = 16 / 32
Mole of sulphur = 1/2 mole
Finally, we shall determine the number of atoms in the jar. This can be obotained as follow:
From Avogadro's hypothesis,
1 mole of sulphur = 6.02×10²³ atoms
Therefore,
1/2 mole of sulphur = 1/2 × 6.02×10²³ atoms
1/2 mole of sulphur = 1/2 × Avogadro's number
Thus, the number of sulphur atom is 1/2 times Avogadro's number
Therefore, Arlo is correct.
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the volume of a balloon filled with he at 755 mmhg is expanded from 2.20 l to 3.86 l at a constant temperature. what is the final pressure (in atm) of the the balloon?
The final pressure of the balloon that was initially filled with a volume of 2.20L to 3.86L is 430.3mmHg.
How to calculate pressure?The pressure of a gas can be calculated using the Boyle's law equation as follows:
P₁V₁ = P₂V₂
Where;
P₁ = initial pressureV₁ = initial volumeP₂ = final pressureV₂ = final volumeAccording to this question, the volume of a balloon filled with He at 755 mmHg is expanded from 2.20L to 3.86L at a constant temperature. The final pressure can be calculated as follows:
755 × 2.2 = P₂ × 3.86
1661 = 3.86P₂
P₂ = 430.3mmHg
Therefore, the final pressure of the balloon that was initially filled with a volume of 2.20L to 3.86L is 430.3mmHg.
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[cu2 ] concentration in a copper-silver electrochemical cell is 0.1m at 25 oc. if the total cell potential is 0.422v, what is the [ag ] concentration?
If 1. 00 kg of zn reacted with excess sulfur, how much energy would be released?.
The energy that is going to release in Zn-sulfur reaction is 3168.92 kJ.
The chemical equation of the given Zn-sulfur reaction is :
Zn + S →Zn + 205.98 kJ
The molar mass of the zinc is 65 g.
1 mole is equivalent to 65 g of zinc which means the amount of energy released by 1.00 kg zinc is :
1 kg = 1000 g
Now,
205.98/65 g × 1000g
= 3168.92 kJ
The total energy released is 3168.92 kJ.
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how many formula units are there in 212 grams of mgCl2
Formula units are there in 212 grams of MgCl₂ are 830.56
Formula is the empirical of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations and it is the lowest whole number ratio of ions represented in an ionic compound
Here given data is
MgCl₂ = 212 grams
1 mole of magnesium chloride has mass = 95.211 gram and contains 6.022×10²³formula units of magnesium chloride
Here 212 grams×6.022×10²³form unit of MgCl₂/95.211 gram = 830.56
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the experiment ph values for the solutions shoudl be fairly good agreement with the theoretical ph values for each of the solutions tested. why? what are some things thay could cause the experimental ph to be different than the theoretical ph
Experimental pH indicates the pH obtained by directly measuring a specific sample with a pH meter.
The main difference between calculated and experimental pH is that calculated pH gives the pH obtained by solving the pH equation whereas experimental pH is measured directly with a pH meter. It is to indicate the value of a particular sample obtained.
Because microorganisms such as bacteria are sensitive to the concentration of hydrogen ions present in the environment, pH results will change over the course of an experiment. pH is affected by larger proteins, including enzymes. pH is a quantitative measure of the acidity or basicity of a solution while acidity is a qualitative measure of the acidic properties of a solution.
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the best water for preparing side-bench reagents is
A. river water B. warm water C. distilled water D. tap water
Answer:
the answer is C.Distilled or deionized water.
1. a. What is work? Write its SI unit and the factors affecting work
atmospheric pressure at the summit of mount everest is about one third the pressure at sea level, which is 760 mm hg. what is the partial pressure of oxygen (po2) at the summit of mount everest if oxygen makes up 21% of the atmosphere by volume at both locations?
The total pressure on Everest would be 34 kPa (or one-third of 102 kPa), and the partial pressure of oxygen would be 34 0.208 = 7.07 kPa.
Atmospheric pressure is the amount of force a given atmospheric column exerts relative to its size. At Mount Everest's summit (8848 m above sea level), the atmospheric pressure is 253 mmHg. The risk to a climber's life at high altitudes may come from the altitude itself. Since atmospheric pressure decreases with altitude, it is 33% lower at the summit of Everest than it is at sea level. Air pressure increases as air density decreases and air thickness increases. The density of air is influenced by a variety of factors. Most significantly, air becomes less dense as altitude rises, lowering atmospheric pressure.
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Calcium chloride can be used to
melt ice during winter. A 750 mL
sample of melted snow was
collected and the calcium chloride
analyzed. The sample contained
1.54 g of calcium chloride.
Calculate the percent by mass
concentration of calcium chloride
The percent by mass concentration of calcium chloride is 0.20%
What is mass concentration?
Mass concentration, which is a quantity to measure this same concentration of a solute in the solution, is similar to molar concentration, molality, and mass fraction. It reveals how much of a solute there is in a certain volume of solution. Let's use coffee as an example to try to understand it. By combining coffee, sugar, and hot water, a straightforward instant coffee can be made. 10 g of coffee and 5 g of sugar are required to make a typical cup (250 mL) of coffee. Depending on individual preferences, the sum may change. We will need twice as much of the ingredients—20 g of caffeine and 10 g of sugar—to make two cups (500 mL).
When the mass of a solute as well as the mass of a solution are given, the mass percent is employed to express this same concentration of a solution:
Mass Percent=Mass of Solute/Mass of Solution×100%
% by mass = mass of substance/ mass of solution * 100 %
= 1.54/750*100 % = 0.20%
The percent by mass concentration of calcium chloride is 0.20%
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are plants and animals ph sensitive?
Answer:
yes, they are ph sensitive
Explanation:
Plants and animals are known to show growth sensitive to pH. pH is known as the hydrogen ion concentration of a solution. For example, plants are known to be growth sensitive to the pH of the soil. Plants need an optimum pH of soil for their growth, hence, showing growth dependence on soil pH.
Choose the isotope in each pair that can be used in radiometric dating. Then, explain how you made your selection. (Hint: you'll need a version of the periodic table of elements that includes each element's atomic weight.)
Potassium-41, Potassium-39
Chlorine-35, Chlorine-36
Iodine-129, Iodine-127
The two isotopes that can be used for the process of dating are Potassium-41, Potassium-39.
What is radiometric dating?The term radiometric dating has to do with the process by which the age of a rock can be discovered. We know that rocks that are around us have been around for very many years. As a matter of fact, there are some of the rocks that could be regarded as being as old as the earth could be in itself.
We have to note that one of things that could be regarded as important in the use of any isotope for dating is that isotope must have a long half life. The fact that the isotope has a long half life means that it is able to remain long enough for it to be used in the study of a substance.
We know that most of the rocks are composed of potassium as part of the components of the rock. In that case, if a dating technique would involve the potassium atom then it is likely to be a successful one as it were.
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