What is meant by exposure route?
Answers
Exposure route can be defined as a way by means of which a person can come in contact with the hazardous chemicals, this can be prevented by wearing personal protective equipments.
What are personal protective equipments?
Personal protective equipment is a protective clothing which is worn to protect the wearer's body from hazard or injury.The hazards which can be addressed by the use of personal protective equipment are physical,chemical and bio hazards.
It imposes a barrier between the user and the working environment.The main purpose of personal protective equipment is to reduce exposure of employees to the hazards.
It has a limitation that it does not eliminate the hazard and may lead to harm to the employee if the equipment is damaged.
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Related Questions
Which cell is an animal cell
Answers
I hope this helped
Answer: the eukaryotic cell
Explanation: Animal cells are typical of the eukaryotic cell, enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles. Unlike the eukaryotic cells of plants and fungi, animal cells do not have a cell wall.
What is the mass, in kilograms, of 3.28 x 103 mol of H2O?
Answers
3.28 x 10³ mol of water has a mass of 59.1156 kg. This is the accurate answer to the given question.
How do you determine 3.28 x 10³ mol of H2O's mass in kilograms?We can use the molar mass of water, which is 18.02 g/mol, to calculate the mass of 3.28 x 10³ moles of H2O. The following equation can be used to translate the quantity of moles into grams:
mass is determined by multiplying the number of moles by the molar mass.
Inputting the values provided yields:
18.02 g/mol times 3.28 x 10 3 moles of mass equals 59,115.6 g.
Lastly, by dividing by 1000, we can change the mass from grams to kilograms:
mass is 59,115.6 grams per kilogram (59.1156 kg).
As a result, 3.28 x 10³ moles of H2O have a mass of 59.1156 kg.
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Hera much hydrogen-3 wil remain after 60 years if the original sample had a mass of 100.0 g and the half-life of hydrogen-3 is 12 years?
Answers
Your teacher has tasked you with creating a presentation to the school to encourage your school-mates to decrease the environmental impact
of plastic waste. He has asked you to address the following issues:
-consequences of plastic waste
-how to "reduce, reuse, recycle."
What might you include in your presentation?
Answers
The presentation must explain the concept and show real images to engage the audience.
What should be in the presentation?Start off by grabbing your audience's attention with a compelling fact or statistic. Display pictures or movies depicting plastic garbage in the natural world, such as in landfills, the ocean, or on beaches.
Give examples of how to reduce plastic waste, such as by bringing a reusable water bottle or switching to cloth grocery bags in place of plastic ones.
Summarize your presentation's main themes and implore the audience to act.
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4. A bottle of water at a room temperature of 21.0 C is placed into a refrigerator
with an air temperature of 4.5 C. The thermal energy will move –
O F. from the cooler air to lower the temperature of the water to 4.500
G. in both directions until the temperature is equal in the water and the air
H. from the water to the air until the water temperature is zero degrees Celsius
O J. from the water to the air until the temperature is equal in both
Answers
OF. from the cooler air to lower the temperature of the water to 4.500
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.
Answers
Answer:Question
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.
Explanation:
Question
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.
Which of these are products of photosynthesis?
Question 2 options:
oxygen and chlorophyll
carbon dioxide and water
oxygen and sugar
oxygen and carbon dioxide
Answers
Answer:
carbon dioxide and water
Explanation:
The process by which plants make their food with the help of water, carbon dioxide, sunlight and convert it into sugar and provides energy to the plant.
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a solution is prepared by mixing 694.0 ml of ethanol with 506.0 ml of water. the molarity of ethanol in the resulting solution is 10.32 m. the density of ethanol at this temperature is 0.7893 g/ml. calculate the difference in volume between the total volume of water and ethanol that were mixed to prepare the solution and the actual volume of the solution.
Answers
The difference in volume is -59.1 mL, indicating that the actual volume of the solution is slightly less than the initial volume of the water and ethanol that were mixed.
These are the following steps for calculation :-
First, we need to calculate the amount of ethanol in the solution:
moles of ethanol = molarity × volume of solution
moles of ethanol = 10.32 mol/L × 0.6940 L
moles of ethanol = 7.15488 mol
Next, we can calculate the mass of ethanol in the solution:
mass of ethanol = volume of ethanol × density of ethanol
mass of ethanol = 0.6940 L × 0.7893 g/mL
mass of ethanol = 0.547 grams
Now we can calculate the mass of water in the solution:
mass of water = volume of water × density of water
mass of water = 0.5060 L × 1 g/mL
mass of water = 0.5060 grams
The total mass of the solution is:
total mass = mass of ethanol + mass of water
total mass = 0.547 grams + 0.5060 grams
total mass = 1.053 grams
The density of the solution is:
density = total mass / total volume
total volume = total mass / density
total volume = 1.053 grams / (694.0 mL + 506.0 mL)
total volume = 1.053 grams / 1200 mL
total volume = 0.8775 g/mL
The difference in volume between the total volume of water and ethanol that were mixed to prepare the solution and the actual volume of the solution is:
difference in volume = actual volume - initial volume
difference in volume = 1 / 0.8775 - (694.0 mL + 506.0 mL)
difference in volume = 1.1409 L - 1200 mL
difference in volume = -59.1 mL
Therefore, the difference in volume is -59.1 mL, indicating that the actual volume of the solution is slightly less than the initial volume of the water and ethanol that were mixed.
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H2 is an example of? A. a molecule B. an element or C. both a molecule and an element.
Answers
It is an element
It is a molecule
How many moles of electrons will be removed from methane when a methane oxidizing organism converts 119 moles of methane (ch4) to carbon dioxide gas (co2) during respiration?
Answers
moles of electrons will be removed from methane when a methane oxidizing organism converts 119 moles of methane (CH₄) to carbon dioxide gas (CO₂) during respiration would be 119 as well. Each mole of methane (CH4) that is converted to carbon dioxide (CO2) during respiration yields
one mole of CO2. The number of moles of methane converted is equal to the number of moles of electrons extracted from methane because each carbon atom in a methane molecule and each carbon atom in a carbon dioxide molecule. 119 moles of methane are being transformed in this
instance, hence 119 moles of electrons will likewise be lost. This happens because each carbon atom in methane loses four electrons during the oxidation process, resulting in the creation of one carbon dioxide molecule and the elimination of four moles of electrons.
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Find the coordinates of the midpoint of the segment given it's endpoints (-3, 7) and (3,-5)
Answers
Answer:
(0,1)
Explanation:
Endpoints (-3, 7) and (3,-5)
The midpoints will be the average of the x and y coordinates:
Midpoint for x = (-3+3)/2 = 0
Midpoint for y = (7-5)/2 = 1
(0,1)
Carbon cycle – What are the main reservoirs
of the carbon cycle? Where do the inorganic and organic carbon
cycles interact? What are the major differences and similarities
between the inorganic and organic carbon?
Answers
The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.
The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.
Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.
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if you use too much hot solvent when dissolving your crude compound, how will that impact the recovery of your compound and why?
Answers
Recrystalization will occur.The solution may become too diluted for crystals to form if you add too much solvent. Impurities will be captured by a hastily formed crystal's lattice. The crystals that result will also be smaller.
What is Recrystalization?Recrystallization is a physical process used to separate compounds based on how soluble they are. Heating the material to dissolve the compound with impurities in a mixture of a suitable solvent completes the procedure. We can remove the desired chemical or contaminants from the mixture using this method.
The solution may become too diluted for crystals to form if you add too much solvent. The flask needs to be gently cooled, first at room temperature and then in cold water. Impurities will be captured by a hastily formed crystal's lattice. The resulting crystals will also be smaller.
This method is used to harden steel in order to eliminate all strain hardening side effects, including the significant plastic deformation brought on by cold working.The crystals that frequently form when the compound precipitates out gave it its name. The natural expansion of larger ice crystals at the expense of smaller ones is another definition of recrystallization.Some commonly effective mixes include diethyl ether-methanol (or ethanol) for polar molecules (particularly esters, alcohols, and hydrocarbons) and diethyl ether-petroleum ether (or benzene) for strongly linked solids (notably amides, alcohols), as well as many natural products.The three main types of recrystallization are;
Single-solvent recrystallization.Multi-solvent recrystallization.Hot filtration-recrystallization.To know more about Recrystalization, refer to:
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Classify these descriptions as pertaining to nonspontaneous reaction in a cell only, a spontaneous reaction in a cell only, both, or neither.
Answers
On the basis of classification, electrolytic cells use non-spontaneous reactions which require an external power source in order to proceed.
On the other end, galvanic cells are spontaneous reaction, meaning it occurs with no outside intervention
What is a chemical change?A chemical change or reaction simply refers to a change which is not easily reversed and in which no new substance is formed.
So therefore, On the basis of classification, electrolytic cells use non-spontaneous reactions which require an external power source in order to proceed.
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Is a process that is internally reversible and adiabatic necessarily isentropic?.
Answers
No, a process that is internally reversible and adiabatic is not necessarily isentropic. A process is isentropic if there is no change in entropy during the process. However, a process can be internally reversible and adiabatic and still have a change in entropy.
Entropy is a measure of the disorder of a system, and a reversible process can still have a change in entropy if the system is not in equilibrium.A reversible process is one that can be reversed without any change in entropy. However, if the system is not in equilibrium, the process can still have a change in entropy. This is because the entropy of a system is a measure of the disorder of the system, and a system that is not in equilibrium is not in a state of maximum disorder.
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What happens to the temperature of the water when it reaches its boiling point and begins to vaporize?
Answers
Answer:
Vapor pressure increases with temperature because molecular speeds are higher as temperature increases. Water boils at 100 °C because the vapor pressure exceeds atmospheric pressure at this temperature.
Explanation:
C1 Progress quiz: Atomic structure 2 - test
4 The atomic radius of a silicon atom is 1.1 x 10-10 m. Calculate its atomic radius in
nanometres.
O
11 nm
o
0.011 nm
0.11 nm
1.1 nm
Answers
Answer:
0.11 nm
Explanation:
1.1 x 10-10 m
The goal is to convert the atomic radius from meters (m) to nanometres (nm). We do this by multiplying the value by 10^9.
This is given as;
\(1.1 * 10^{-10} * 10^{9}\\1.1 * 10^{-10 + 9}\\1.1 * 10^{-1}\\0.11\)
Which is a characteristic of calcium?
A.It has two neutrons
B.It has two energy shells
C.It has two protons
D.It has two electrons in its outer energy shell
Answers
It has two electrons in its outer energy shell
FILL IN THE BLANK Dissolve a sugar cube in water and you still have sucrose, not ....................
This does not mean that sucrose or water cannot be broken down into simpler substances.
But methods must involve a ...........
Answers
Dissolve a sugar cube in water and you still have sucrose, not oxygen, carbon, and hydrogen. This does not mean that sucrose or water cannot be broken down into simpler substances.
But methods must involve a chemical change.
The change in which the molecular composition is completely altered and a new product is formed is called a chemical change.
Chemical changes create a new product.
The changes in chemical change are irreversible and permanent.
A chemical change occurs when the substance's composition is changed. When bonds are broken and new ones are formed a chemical change occurs.
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you buy 300mL of soda that weighs 60g. What is the sodas density?
Answers
Answer:
20g/cm³
Explanation:
density= mass÷volume
m= 60g÷3cm³
= 20g/cm³
P4O10 + H2O —>
what are the products
Answers
Answer:
P4O10 + H2O → H3PO4
Explanation:
A sample of pure copper has a volume of 3.75 cm3. Calculate the mass
Answers
The sample of pure copper weighs 33.6 g.
What is an example of mass by volume?(Mass of Solute/Volume of Solution) x 100 represents the mass by volume proportion. It compares the volume of the solution to the mass or weight of the solute in grammes, for instance (e.g., in mL). An illustration would be a medical saline solution with a 0.9 percent (w/v) NaCl solution, which contains 0.9 g of NaCl per 100 mL of solution.
The calculation requires the density of copper, which is 8.96 g/cm³.
The following is the formula to determine a substance's mass:
mass = density × volume
Substituting the values given:
mass = 8.96 g/cm³ × 3.75 cm³
mass = 33.6 g
The sample of pure copper therefore has a mass of 33.6 g.
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Em um pacote com tampa foram reunidos os seguintes materiais um litro de água 100 ml de etanol 100 ml de óleo de cozinha uma colher de sopa de açúcar e uma moeda após forte a preparar o conteúdo do recipiente e descansar por alguns minutos o número de fases é uma duas três quatro ou cinco
Answers
what are the representative elements usually called
Answers
Answer:
There are two sets of groups in the periodic table. The first set are Group A elements and are also known as representative elements. The second set are Group B elements and are also known as transition metals. Representative elements are the most abundant elements on earth.
experiment 2: given that the concentration of the stock solution of cuso4 was 0.060 m, what was the concentration of cuso4 in cuvette 2? select the closest answer. 0.060 m 0.042 m 0.024 m 0.42 m
Answers
The concentration of cuso4 in cuvette 2 is 0.030 M. None of the options given in the question are exact, but the closest answer is 0.024 M.
We can use the formula: concentration of stock solution x volume of stock solution = concentration of diluted solution x volume of diluted solution Let's assume that we diluted the stock solution by a factor of 2 to prepare cuvette 2 (i.e. we added an equal volume of water to the stock solution).
In this case, the volume of stock solution and diluted solution are the same, so we can simplify the formula to: concentration of stock solution = concentration of diluted solution x dilution factor Substituting the values given in the question, we get:
0.060 M = concentration of diluted solution x 2 Solving for the concentration of diluted solution, we get: concentration of diluted solution = 0.060 M / 2 concentration of diluted solution = 0.030 M
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in this experiment, which species gets reduced? in this experiment, which species gets reduced? 2-ethyl-3-oxohexanal acetic acid 2-ethyl-1,3-hexanediol hypochlorous acid
Answers
The answer is that 2-ethyl-3-oxo hexanal gets reduced in this experiment. This is because reduction involves the gain of electrons, and in this experiment, 2-ethyl-3-oxo hexanal is being reduced to 2-ethyl-1,3-hexanediol.
Reduction is a chemical reaction that involves the gain of electrons. In this experiment, we can see that 2-ethyl-3-oxo hexanal is being reduced to 2-ethyl-1,3-hexanediol. This means that 2-ethyl-3-oxo hexanal is losing electrons and becoming more positively charged, while 2-ethyl-1,3-hexanediol is gaining electrons and becoming more negatively charged. The other species listed, acetic acid and hypochlorous acid, are not directly involved in the reduction reaction and do not get reduced themselves.
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Classify each of these solids as ionic, molecular, metallic, or covalent (also known as covalent-network solids or macromolecular solids). Ionic Molecular Metallic Covalent Answer Bank cal, C (diamond) AICI,
Answers
The given solids are classified as: Diamond- covalent solid, aluminum chloride-Ionic solids, Copper- Metallic solids, dry ice- molecular solids
The classification of a solid depends on the type of chemical bonding between the atoms or molecules that make up the solid. Covalent solids are held together by covalent bonds, ionic solids by ionic bonds, metallic solids by metallic bonds, and molecular solids by intermolecular forces between the molecules.
Some other examples of such solids are: Covalent solids- Graphite, silicon dioxide (quartz), silicon carbide. Ionic solids- Sodium chloride, magnesium oxide, calcium carbonate, potassium iodide. Metallic solids- Iron, gold, aluminum. Molecular solids- sulfur, ice (solid water), solid nitrogen
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The complete question is:
Classify each of these solids as ionic, molecular, metallic, or covalent (also known as covalent-network solids or macromolecular solids).
Diamond, Aluminum chloride, copper, dry ice.
plllllllllllllllllllllllllllz
When the process of condensation occurs, the kinetic energy of particles
is insufficient to overcome intermolecular forces.
becomes independent of temperature.
becomes exactly equal to the intermolecular forces.
easily overcomes the intermolecular forces.
Answers
Answer:
Explanation:
is insufficient to overcome intermolecular forces.
Answer:
hope this helps
Explanation:
When the process of condensation occurs, the kinetic energy of particles is insufficient to overcome intermolecular forces.
becomes independent of temperature,
becomes exactly equal to the intermolecular forces easily overcomes the intermolecular forces
cartridge brass an fcc substitutional solid solution of zn in cu? is it a two-phase alloy or single-phase alloy?
Answers
Cartridge brass an fcc substitutional solid solution of zinc (Zn) in copper (Cu) is a single-phase alloy.
The FCC stands for face centered cubic lattice. An alloy is defined as a metal that is made up of two or more chemical elements, at least one of which is a metal, and where the atoms are intermixed through metallurgical processing. The atoms of the different elements in an alloy are commonly separated by a few atomic diameters, which distinguishes them from a mixture of metals in which the chemical properties of each component remain unchanged.
There are two types of alloys: single-phase alloys and two-phase alloys. When all of the atoms in an alloy are in the same phase, it is known as a single-phase alloy. In a single-phase alloy, the atoms are uniformly distributed throughout the sample. The material is considered to be homogeneous, or the same throughout, because all of the atoms are in the same phase.
On the other hand, when an alloy contains two different phases, it is known as a two-phase alloy. The constituents are in different phases. In such cases, the phases can either be entirely separated from one another or dispersed. To summarize, cartridge brass is a single-phase alloy because it is an FCC substitutional solid solution of zinc in copper.
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calculate the number of moles of magnesium, chlorine, and oxygen atoms in 2.70 moles of magnesium perchlorate, mg(clo4)2 .
Answers
The number of moles of magnesium, chlorine, and oxygen atoms in 2.70 moles of magnesium perchlorate is 2.70, 5.40, 21.60.
The formula of the compound is Mg(ClO4)2.
From the formula, we can see that 1 molecule of Mg(ClO4)2 contains 1 atom of Mg, 2 atoms of Cl and 8 atoms of O.
So 2.70 mol Mg(ClO4)2 contains
1 * 2.70 mol Mg = 2.70 mol Mg
2 * 2.70 mol Cl = 5.40 mol Cl
8 * 2.70 mol O = 21.60 mol O
So, the required answer is 2.70, 5.40, 21.60.
Therefore, the number of moles of magnesium, chlorine, and oxygen atoms in 2.70 moles of magnesium perchlorate is 2.70, 5.40, 21.60.
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