how many grams of perchloric acid, are contained in of aqueous perchloric acid? how many grams of water are in the same solution?

The amount of Titanium atoms that has a density of 4.50 g/cm³ and edge length of 2.78 in would be 1.99 × 10²⁵atoms

The density of a substance can be defined as the mass of the substance divided by its volume. To calculate the density of a cube, we can use this following formula:

Density of a cube = Mass of cube ÷ Volume of cube

Edge length of cube = 2.78 inches = 7.0612 cm

Volume of cube = (Edge length)³

Volume of cube = (7.0612)³

Volume of cube = 352,075283 cm³

Mass of cube = Density of cube × Volume of cube

Mass of cube = 4.5 g/cm³ × 352,075283 cm³

Mass of cube = 1584.33877 g

The formula to calculate the moles of Titanium is as follows:

Moles of Ti = Given mass of Ti ÷ Molar mass of Ti

Moles of Ti = 1584.33877 g ÷ 47.867 g/mol

Moles of Ti = 33.099 mol

Atoms of Ti = 33.099 mol × 6.022×10²³ atoms/mol

Atoms of Ti = 1.99 × 10²⁵ atoms

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The molecules will be closer together and lean toward solid behavior as the intermolecular forces become stronger. More gas-like behavior results from weaker intermolecular forces. Accordingly, the correct response is that bromine has greater intermolecular forces.

Because bromine has a slightly higher molecular weight than fluorine and stronger intermolecular bonds, it doesn't become a gas at ambient temperature like fluorine does. Due to its enormous molecular weight and intense Van Der Waals forces, iodine is a solid at normal temperature. The diatomic molecules of the halogens (F2, Cl2, and so on) are all present. Van der Waals forces are what draw molecules together in most interactions.

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Answer:

0.0306 moles

Explanation:

The number of moles of zinc metal (2.0 g Zn) used can be calculated using the formula:

moles = mass / atomic weight

where atomic weight is the mass of one mole of atoms of the element.

First, find the number of moles of zinc:

moles = 2.0 g / 65.39 g/mol = 0.0306 moles

So, 0.0306 moles of zinc metal (2.0 g Zn) were used.

An atom's reactivity is determined by the amount of electrons in its outermost shell.

A chemical element is uniquely determined by its atoms, which are tiny pieces of matter. An atom is made up of a core core and one or perhaps more electrons with negative charges that orbit it. The positive charges, comparatively hefty atomic nuclei that make up the nucleus may be present.

Quarks and protons are the two categories of fundamental components that comprise an atom. An atom's nucleus is encircled by an area of electrons. The electrical charge of the every electron is negative one. The neutrons and protons which together help compensate an atom's nucleus, are formed of quarks.

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A dipole is indeed a polar molecule featuring two electrically charged areas from either end.

Both negative and positive charge areas are present in polar compounds. An illustration of a polar substance is water. Given its form and type of bonds, the molecule has a net positive charge for one end (the gas end) and a gradually decreasing charge on the other side (the oxygen end).

All covalent bonds that are polar and hydrophilic should be depicted by sending arrows towards an more charged object in order to identify whether the molecule stands polar or non-polar. The relative polarity can be depicted by altering the arrows' lengths.

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2.03 mol  of H₂S contain 2.03 mol of S. A mole is exactly  6.022×10²³ , which equals Avogadro's number of particles.

A mole must be specified or be based on something repeatable, like all other units. The amount of atoms in a sample of the isotope carbon-12 was formerly the basis for the current definition of the mole, which is now based on other factors.

Today, a mole is exactly  6.022×10²³ , which equals Avogadro's number of particles. For all intents and purposes, the weight with one mole of a given substance in grams and the weight of one molecule in Daltons are essentially equivalent.  2.03 mol  of H₂S contain 2.03 mol of S.

Therefore, 2.03 mol  of H₂S contain 2.03 mol of S.

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Oxygen (O2), and Oxygen serves as the ultimate electron acceptor (O2). Since oxygen has a strong affinity for electrons and a high electronegativity, it is the perfect acceptor for low-energy electrons.

If one "molecule of isocitrate" serves as a substrate during "aerobic respiration," four molecules of "the last electron acceptor" in ETS are needed. The creation of three and two ATP molecules, respectively, arises from the electron transport system, which is the last stage in the process of releasing ATP from FADH2 and NADPH.

NADH performs the same role as the food molecule as an electron donor. The oxidoreductases, which transfer electrons from NADH to molecular oxygen, another electron acceptor, are the electron transporters anchored in the mitochondrial membrane.

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Moving hot food in a covered pan to a cooler space, such as a storage room, or submerging it in ice water, is another option. Ice can also be used to hasten the cooling process.

Soups can be chilled by submerging them in cold water. This technique aids in a swift and secure drop in food temperature. To make a slush, put some ice in a big container or sink and add some water. After that, put the plate of food to be chilled into the ice bath. bathing in ice water and stirring the food often.Food is stirred with ice paddles, which are plastic containers that have been frozen after being filled with water.using ice as a component (if water is an ingredient).chiller that jars or tumbles.

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Explanation:

(1) The mechanism of the reaction between propene and hydrogen bromide to give 2-bromopropane is as follows:

Protonation of the alkene: A proton from hydrogen bromide (HBr) attacks the alkene, forming a carbocation intermediate.

Bromine addition: Bromine (Br) adds to the carbocation intermediate to form an intermediate bromonium ion.

Deprotonation: A proton from the bromonium ion is removed by a water molecule or another molecule, producing the final product 2-bromopropane.

The mechanism can be represented using curly arrows as follows:

H,C

H

c=c

H

H

H-Br

CH, H

H-C-C-H

Br H

CH, H

1 1

H-C-C-H

Br H

2-bromopropane

(2) 2-bromopropane is the main product of this reaction because of the stereochemistry of the reaction. When the carbocation intermediate forms, the bromine atom has a preference for adding to the face of the alkene that has the least number of hydrogen atoms. This leads to the formation of the 2-bromopropane, which has the bromine atom attached to the carbon atom with two hydrogen atoms. On the other hand, the formation of 1-bromopropane, which has the bromine atom attached to the carbon atom with three hydrogen atoms, is less favorable. This is why 2-bromopropane is the main product of this reaction.

The molar mass of N₂O₅ is greatest mass. The oxide of nitrogen, or N2O5, is a nonmetal that is also in its highest oxidation state, making it (very) acidic.

Avogadro's number of molecules (molecular compound) or formula units are found in one mole of a chemical (6.022 x 1023) (ionic compound). You may determine the mass of 1 mole of a compound by looking at its molar mass. In other words, it provides the number of grams in a substance per mole.

Making use of the Mole. The molar mass of a substance is the weight of a mole of that substance. In chemistry, the molar mass is frequently employed to convert grammes of a chemical to moles. The periodic table lists an element's molar mass, which is its atomic weight in grammes per mole (g/mol).

Number of moles = mass/molar mass

Molar mass of N₂O₅ = (14×2+16×5) g/mol = 108 g/mol

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Therefore option a and e is correct.

The synthetic polypeptides polylysine and polyglutamate are two examples of under the right circumstances, polylysine and polyglutamate may both create alpha-helical structures.

In polypeptides, such as polylysine and polyglutamate, the development of the alpha-helix is impacted by a number of variables, including pH, temperature, and solvent conditions. One of the most crucial elements influencing the creation of an alpha-helix is the pH level. Generally speaking, neutral to slightly basic pH levels support alpha-helix development (around 7 to 9). However, depending on the particular circumstances and the sequence of the polypeptide, the precise pH range for alpha-helix formation in polylysine and polyglutamate may change.

The NH2 groups on the side chains of lysine become charged when the pH decreases, making it impossible for helices to form due to charge repulsion between these groups.

If more than 50% of the lysine residues need to be charged in order to "break" the helix, this might happen below the lysine pKa. A different pKa for lysine residues in polylysine compared to the monomer (free amino acid) in solution is another option.

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Over the past century, advances in synthetic chemistry have made it possible to find numerous ground-breaking treatments that have benefited human health. To find the next generation of medications in the face of growing hurdles in the pharmaceutical industry, chemistry innovation must continue.

Generally speaking, there are two forms of modern drug synthesis:

1) Chemical synthesis - Through the use of chemical reactions. There is always a large-scale manufacture of medicines as a result of the chemical reaction. For medicinal synthesis, careful attention to detail at each stage is important.

2) Bioprocessing synthesis: In this method, bacteria are employed to create medicines. The ability of microbe cell walls to make beneficial products from them is the basic foundation of it.

Drug manufacture is an expensive and time-consuming process because of the moral dilemmas surrounding in vivo models and the scanty outcomes. The pharmaceutical industry is now making efforts that have been successful in developing and refining novel drug-delivery systems.

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Its primary source of energy is nonrenewable resources. Each year, fossil fuels account for roughly 80% of total global energy consumption. We rely on fossil fuels because they are high in energy and relatively inexpensive to produce.

We rely on fossil fuels because they are high in energy and relatively inexpensive to produce. A major issue with fossil fuels, aside from their scarcity, is that burning them emits carbon dioxide into the atmosphere.

Coal, natural gas, oil, and nuclear energy are examples of nonrenewable energy resources. Once these resources are depleted, they cannot be replenished, which is a major issue for humanity because we rely on them to meet the majority of our energy needs.

Thus,  we depend primarily on non-renewable energy sources.

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Using the information provided, we can determine that the compound is S2F10, which has 25.24% by mass of sulfur in a fluorine and sulfur combination.

What is a substance made up of fluorine and sulfur?

Several distinct compounds, such as sulfur hexafluoride and sulfur tetrafluoride, are created when sulfur and fluorine are combined. 4.45 g of fluorine and 1.25 g of sulfur are produced during the breakdown of a sample of sulfur hexafluoride.

What kind of bond results from the union of fluorine F and sulphur S?

S has an electronegativity of 2.58, whereas F has an electronegativity of 3.98. The difference in electronegativity between the two atoms is 1.40. We define a bond formed between two atoms as polar covalent when the difference in electronegativity is between 0.5 and 1.6.

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When a solution is prepared, the number of ions in the solution will definitely increase relative to the pure solvent when a solution is prepared.

When a solution is prepared by dissolving a solute in a solvent, the number of ions in the solution will definitely increase compared to the pure solvent. This is because the solute, when dissolved, will break apart into individual ions and will mix with the solvent to form a new mixture. The increased number of ions in the solution increases its ability to conduct electricity, which can be measured as conductivity. However, the conductivity of a solution may not necessarily increase with an increase in the number of ions, as the mobility of the ions and the concentration of the ions are also important factors that determine the conductivity. Additionally, the boiling point of a solution may not necessarily increase with the increase in the number of ions, as the boiling point elevation depends on the strength of the attractive forces between the solute and solvent molecules, which is determined by the nature of the solute and solvent, as well as the concentration of the solute in the solution. The mole fraction of the solvent in the solution will also not necessarily increase as the amount of solute added to the solution will decrease the mole fraction of the solvent.

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The first and second half-lives for this reaction can be calculated using the following equation: t1/2 = 0.693/k, where k is the rate constant.

Using a rate constant of 0.0022 s-1, the first and second half-lives would be 313.6 s and 627.2 s, respectively. To calculate the time it takes for 90.0% completion, we can use the equation:

t = t1/2 * ln(0.1/C), where C is the initial concentration of the reactant.

Using an initial concentration of 1 and the first half-life of 313.6 s, it would take 577 s for 90.0% completion.

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The difference between the way molecules move in solids compared to other phases is the limited movement and vibrational motion of molecules in solids, compared to the more fluid and unrestricted movement of molecules in liquids and gases.

In solids, molecules are tightly packed and have limited movement due to the strong bonds between them. This results in a fixed arrangement of molecules in the solid phase, with only small vibrational movements occurring.

Compared to molecules in liquids and gases, molecules in solids move differently because they are restricted to small vibrational movements rather than freely flowing and colliding with one another. In liquids, molecules have more freedom to move and flow past one another, while in gases, molecules have the most freedom to move and collide with one another, resulting in the most rapid movement of all the phases.

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In a chemical process, hydrogen metals cannot take the place of iron (Fe). Hence option 'c' is correct.

Metals are bright, opaque materials that easily conduct electricity and heat. Most metals are malleable and ductile, and they frequently have a higher density than other elements.

In general, metals are elements that are hard, lustrous, fusible, malleable, ductile, and have good electrical & thermal conductivity. An element without the characteristics of a metal is referred to as a nonmetal. The metalloid is a element with characteristics that are halfway between those of metals and nonmetals.

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Under saturating agonist conditions, the functional state that describes the NMDA receptor conformation with the lowest Gibbs free energy is Option B. bound to agonists and permeant to ions.

This is because in this state, the receptor is bound to agonists and is open, allowing the flow of ions, leading to the lowest Gibbs free energy. The other states, such as unbound to agonists and impermeant to ions, or unbound to agonists and permeant to ions, would have higher Gibbs free energy due to different conformations of the receptor. The N-methyl-D-aspartate receptor (NMDA receptor) is a type of glutamate receptor that plays a key role in synaptic plasticity and memory. The conformation of the NMDA receptor can be described in terms of its binding to agonists (activating molecules) and permeability to ions. Under saturating agonist conditions, the conformation with the lowest Gibbs free energy is likely to be the one that is bound to agonists and permeant to ions. This conformation has the highest affinity for agonists and the greatest ability to allow ions to pass through, which will result in maximal activation of the receptor. On the other hand, a conformation that is unbound to agonists and impermeant to ions will have a higher Gibbs free energy and will therefore be less likely to be the dominant form under these conditions.

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1) Option 3. Electrons. The type of subatomic particle that most directly determines the chemical reactivity of an atom is electrons.

Electrons are negatively charged particles that occupy the outermost energy level, or valence shell, of an atom. The number of electrons in this valence shell, as well as the arrangement of these electrons, determines the chemical properties of an atom and its reactivity. For example, an atom that has a full valence shell, with 8 electrons in its outer energy level, is considered to be unreactive and unlikely to form chemical bonds. On the other hand, an atom with a partially filled valence shell, such as carbon, nitrogen, or oxygen, is likely to participate in chemical reactions and form bonds with other atoms.

2) carbon (atomic number 6, atomic mass 12) usually makes 4 covalent bonds in organic molecules

Carbon, with atomic number 6 and atomic mass 12, usually forms 4 covalent bonds in organic molecules. This is due to the presence of 4 valence electrons in the outermost shell of the carbon atom. In covalent bonding, atoms share electrons to form a bond and complete their outermost electron shell. Carbon can bond with other elements such as hydrogen, oxygen, nitrogen, etc. to form complex organic molecules such as carbohydrates, lipids, proteins, etc. The ability of carbon to form multiple covalent bonds with other atoms is what makes it the backbone of all living organisms and the central component of organic chemistry. The number of covalent bonds an atom can form is directly related to the number of valence electrons it has, which in turn determines its chemical reactivity.

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The ratio of the masses of carbon that combine with 1.00 g of oxygen between the two compounds is: 2.46, which we can round to 2.

To find the ratio of the masses of carbon that combine with 1.00 g of oxygen between the two compounds, we need to find the empirical formula for each compound.

First, find the number of moles of carbon in each compound:

Compound 1: 22.0 g C / 12.01 g/mol = 1.83 moles

Compound 2: 34.5 g C / 12.01 g/mol = 2.87 moles

Next, we need to find the ratio of moles of oxygen to moles of carbon for each compound. To do this, we need to find the molecular weight of each compound and divide it by the number of moles of carbon to find the number of moles of oxygen.

Compound 1: 80.5 g / (1.83 moles C) = 43.96 g/mol

Number of moles of O in compound 1: 43.96 g/mol / 16.00 g/mol = 2.75 moles

Compound 2: 80.5 g / (2.87 moles C) = 27.98 g/mol

Number of moles of O in compound 2: 27.98 g/mol / 16.00 g/mol = 1.75 moles

Finally, divide the moles of O in each compound by the moles of C in each compound to find the ratio of moles of O to moles of C:

Compound 1: 2.75 moles O / 1.83 moles C = 1.5

Compound 2: 1.75 moles O / 2.87 moles C = 0.61

So the ratio of the masses of carbon which

combine with 1.00 g of oxygen between the two compounds is:

1.5 / 0.61 = 2.46, which we can round to 2.

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The number of half-lives that have occurred in the zircon is 1.

The half-life of 235U is the time it takes for half of the initial number of 235U atoms to decay into 207Pb. The number of half-lives that have occurred in the zircon can be calculated by using the formula:

number of half-lives = log (initial number of 235U atoms) / log (final number of 235U atoms)

Since there are the same number of 235U atoms as there are of 207Pb atoms in the zircon, the final number of 235U atoms is half the initial number of 235U atoms, meaning that one half-life has occurred.

Therefore, the number of half-lives that have occurred in the zircon is 1.

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When estimating VO2max using ml/kg/min , the most appropriate number of significant digits to use is 4-5.

This is because the values for VO2max typically range from 15-50 ml/kg/min, and the accuracy of the value can vary depending on the individual. Therefore, it's important to use the most appropriate number of significant digits when measuring VO2max to ensure accuracy.

When measuring VO2max, it is important to use the most accurate values to ensure accuracy. This involves taking into account factors such as the individual's age, sex, body composition, and fitness level. Additionally, the duration and intensity of the exercise being measured should also be taken into consideration.

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The pH is a measure of the concentration of hydrogen ions, the acidity or alkalinity of a solution. The resulting solution will have pH equal to 12.7.

As we know that Molarity of a solution (M)=[tex]\frac{no. of moles of solute}{volume of solution in litres}[/tex]

Given:- Molarity of [tex]HBr[/tex]= 2.1M and volume= 250ml, therefore the number of moles of [tex]HBr[/tex]= 0.25×2.1=0.525mol.

similarlysimilarlysimilarlysimilarly:- Molarity of [tex]KOH[/tex]=2.5M2.5M and volume= 200ml=0.2L.  therefore the number of moles of [tex]KOH[/tex]= 0.2×2.5=0.5mol.

Now for the reaction:- [tex]HBr+KOH[/tex]⇒[tex]KBr+H_{2} O[/tex], [tex]KOH[/tex] is in excess.

Therefore, the excess amount of [tex]KOH[/tex]= 0.525-0.5=0.025.

Total volume= 0.25+0.2=0.45L.

Now, [tex][OH^{-} ][/tex]= [tex]\frac{0.025}{0.45} =0.05M=5*10^{-2} M[/tex].

Therefore, [tex]pOH=-log[OH^{-} ]=-log[5*10^{-2} ]=1.3[/tex]

Now, as we know that [tex]pH+pOH=14, pH=14-1.3=12.7.[/tex]

Hence, the pH of the resulting solution is 12.7.

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The more polar a liquid is, the more likely it is to be miscible with water, as it has a similar molecular polarity. The less polar a liquid is, the less likely it is to be miscible with water, as its molecular polarity is very different from that of water.

The more polar the liquid, the more likely it is to be miscible with water.

Polarity is a measure of the separation of charge within a molecule. Polar liquids have a positive and negative end due to their molecular structure, which results in an unequal distribution of electrons. Water is a highly polar liquid, and it readily dissolves other polar liquids due to their similar molecular polarity.

On the other hand, nonpolar liquids such as oils have an equal distribution of electrons, making them immiscible with water. When nonpolar liquids are mixed with water, the two phases separate, with the nonpolar liquid floating on top of the water.

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The forces of attraction and repulsion between the particles are insignificant.

The following premises underlie the kinetic molecular theory of gases:

Small particles moving chaotically all the time make up gases.

The entire interior of the container is filled with gas particle.

In elastic collisions, gas particles strike the container's walls and one another.

The relationship between the average gas particle velocity and Kelvin temperature is direct.

The average spacing between gas particles is quite small in comparison.

It is not an assumption of the kinetic molecular theory of gases to assert that the forces of attraction and repulsion between the particles are small, as stated in assumption #4. This presumption holds that intermolecular forces are minimal and have no impact on how gases behave.

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Deposition, which is the transition from a gas to a solid without going through the liquid stage, is the process that takes place when frost forms on a window on a chilly winter day. True choice C).

One of the greatest illustrations of just an exothermic reaction is the exploding of a firecracker, which emits a loud bang along with light and heat.

Therefore, an exothermic reaction happens and its enthalpy will just be negative if it produces more carbon than it takes in. Consider this as a certain quantity of heat evaporating from (or being removed from) the reaction.

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The vapour pressure solution for solution [tex]5g[/tex] of glycerin dissolved in [tex]95g[/tex]Of water along with vapour pressure of water at 25, which is 23.7 is 23.535 [tex]torr[/tex].

It is the pressure that a vapour produces when it is in closed system equilibrium with either its solid or liquid phase at a specific temperature.

Vapour pressure can be simply defined as a measurement of a material's propensity to transition from a solid to a liquid to a gas or vapour when the temperature rises.

This formula is based on Raoult's law, according to which the vapour pressure of a solution is determined by multiplying the mole fraction of each component by the vapour pressure of the pure components.

Pure glycerin has a vapour pressure of 6.99atm and a mole fraction of 0.05. At 25 °C, pure water has a vapour pressure of 23.7 and a mole fraction of 0.95torr.

[tex]P = X_ glycerin \times P_glycerin + X_water \times P_water[/tex]

[tex]X_glycerin = \frac{5g}{100g}= 0.05[/tex]

[tex]X_water = \frac{95g}{100g}= 0.95 P_giycerin=6.99atm[/tex]

[tex]P= 0.05 \times 6.99+ 0.95\times 23.7 = 23.535torr[/tex]

Therefore, The vapour pressure substitute for 95 grams of water and 5 grams of glycerin were dissolved in it. The water's vapour pressure was 25 to 23.7 torr.

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The rate of consumption of O (g) if water vapor is consumed at a rate of 1.60 x 10⁻¹⁰ M/s is 8.0 * 10⁻⁹ M/s.

The rate of a chemical reaction is known as the reaction rate or rate of reaction. It is proportional to the rise in product concentration per unit of time and the fall in reactant concentration per unit of time.

Considering the given equation:

The equation of the reaction is: O (g) + H₂O (g) ---> 2 •OH (g)

The rate of the consumption of water vapor will be twice the rate of consumption of O (g).

Water vapor is consumed at a rate of 1.60 x 10⁻¹⁰ M/s.

Hence, O (g) will be consumed at a rate of 0.5 * 1.60 x 10⁻¹⁰ M/s = 8.0 * 10⁻⁹ M/s.

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When handling a broken piece of glassware, always make sure to wear gloves that are resistant to cuts.

Avoid touching broken glass with bare hands at all costs. When working with broken glass, always sure you use gloves that offer enough cut protection. If you need to remove or retrieve broken glass from a work area or a fume hood, you should make use of mechanical instruments such as forceps, tongs, scoops, or other similar tools.

Cleaning up shards of glass, broken Pasteur pipettes, or shards of glass should be done using a dustpan and a brush. Do not take anything out of the sharps container in any way. Wherever it is practical, use plastic instead of glass for storing liquids, especially desiccators.

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