Give one hazard of using sodium hydroxide and state how to reduce the risks from this hazard.

Linear, trigonal planar, quadrilateral, tetragonal bipyramidal, or octahedral geometries are some examples of electron geometry. Although the molecule's form is changed, the configuration electrons unchanged.

A negative charges new particle known as an electron can either be free or attached to an atom. One of the three principal kinds of particles inside an atom, along with neutrons and protons. is an elementary particle that is linked to the atom.

Electrons are crucial to many physical events. The charge moves from the positive pole to the negative electrode of a battery owing to the electrical pressure caused by the voltage differential between the two terminals.

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Armando used this model to test the idea that you can modify the table legs using a certain sand size and record the results to test the hypothesis that extremely steep hills lead to narrow, deep rivers.

A model is an artificial representation of an object or a process. Models are used to show the process or things that are very big and can not be understood by the actual thing.

Sand, granite, mud, and other objects from the earth are carried away by the energy of the rushing water, along with water-soluble substances like limestone.

Thus, depending on how quickly a river flows, it has more or less. The ability to remove more material, as the river runs more quickly when it is narrow than large, leads to the development of a deep and narrow river.

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The question is incomplete. Your most probably complete question is given below:

Using Models to Answer Questions About Systems

Armando’s class was looking at images of rivers formed by flowing water. Most of the rivers were wide and shallow, but one river was narrow and deep.

Armando’s class thinks that this river is narrow and deep because:

the hill that the water flowed down was very steep, or

the sand grains that the water flowed through were very small.

Ions with opposing charges combine to form ionic compounds, which are held together by a powerful electrostatic force of attraction. They are solids that are hard for this reason. So the given solids represents the ionic solids.

Cations and anions are kept together by electrostatic forces to form ionic solids. Ionic solids typically have high melting temperatures, are rigid, and are brittle due to the strength of these interactions.

Basically, ionic solids are solids that are joined by strong ionic bonds and have ion lattices made up of oppositely charged ions, such as positively charged cations and negatively charged anions. These substances are almost electrically insulating and typically have high melting points.

So the ionic solids are soluble in polar solvents, brittle and have melting points.

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Answer:The plant kingdom consists of organisms which posess the ability to generate their own food through a process called photosynthesis. The animalia kingdom is not capable of this process so they are obligated to obtain food from others. Known to date there are about 250,000 known types of plants.

Answer:

Members of Kingdom Animalia are heterotrophic, whereas members of Kingdom Plantae are typically autotrophic.

Explanation:

Answer:

(D)=1.16g

Explanation:

Answer:

D) 1.16 g

I'm not sure about answer ..

A solution is defined as a mixture of two or more substances, usually, a solute and a solvent, and the difference between these two are in quantity, solute represents the smallest amount and solvent will represent the highest amount, and while you can have more than one solute, you can only have one solvent for a solution. Therefore the statement is true

Answer:

\(\boxed {\boxed {\sf C. \ 30 \ m/s \ east}}\)

Explanation:

Velocity is the vector measurement of the change in position over time. A vector measurement means the answer must include a magnitude (numerical value) and a direction.

Here are some units of velocity:

There are many other units, but m/s is the most common.

We can eliminate choice B and D, because the units (meters-m and meters per second squared-m/s²) are not for velocity.

We are left with choice A (30 m/s) and C (30 m/s east). Remember, velocity needs a number and a direction. C contains the direction east, so it must be the correct answer.  

In the given reaction, if chlorine is the more electronegative element, the formation of the compound SCl2 (sulfur dichloride) would occur.

Electronegativity is a measure of an element's ability to attract electrons towards itself in a chemical bond. Chlorine is more electronegative than sulfur, which means it has a stronger pull on electrons. In the reaction, the chlorine molecule (Cl2) would react with sulfur (S) to form sulfur dichloride (SCl2). The more electronegative chlorine atoms would attract the bonding electrons closer to themselves, resulting in a polar covalent bond. This means that there would be partial positive charge on the sulfur atom and partial negative charges on the chlorine atoms in the SCl2 molecule. The reaction can be represented as:S + Cl2 → SCl2. Overall, when chlorine is the more electronegative element, sulfur dichloride (SCl2) would form as a result of the reaction between sulfur and chlorine.

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Answer:

diagram C best represents the mixture

Answer:

There is little if any, space left between its adjacent molecules.

Good luck!

The liquid that may be used during the management of acute fluoride toxicity is c. milk as it can help the toxic chemicals to be removed through the kidneys.

The management of acute fluoride toxicity involves a variety of interventions, depending on the severity of the toxicity. One important step is to administer a liquid that can bind with fluoride ions and facilitate their excretion from the body.

Out of the options given, milk is the most appropriate liquid to use during management of acute fluoride toxicity.

Milk contains calcium and magnesium, which can bind with fluoride ions and form insoluble complexes that can be excreted by the kidneys.

The calcium and magnesium in milk can also help to reduce the absorption of fluoride from the gastrointestinal tract, further aiding in the removal of fluoride from the body. Hence, option c is correct.

Apple juice, lemonade, and coffee are not recommended during management of acute fluoride toxicity as they are acidic and can increase the absorption of fluoride from the gastrointestinal tract. This can worsen the toxicity and increase the risk of complications.

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Answer:

thermal shock

Explanation:

the temperatures inside the glass jar should have continued to increase over time. Internal stresses due to uneven heating. This is also known as “thermal shock”.

In general, the thicker the glass, the more prone it will be to breaking due to the immediate differences in temperature across the thickness of glass.

Borosilicate glass is more tolerant of this, as it has a higher elasticity than standard silicon glass.

You may also note that laboratory test tubes and flasks are made with thinner walls, and of borosilicate glass, when designated for heating.

Answer:

c

Explanation:

A formula that shows how many atoms of each element a substance contains

The moles of H2 are contained in a balloon that contains hydrogen and water vapor, has a volume of 28.3 cm3 at 25.0oc and a total pressure of 1.001 atm is 7.28 moles.

Pressure is defined as the tension at a point inside a confined fluid, or the perpendicular force per unit area. The physical amount of force applied to a certain region is known as pressure.

Given

P = 1.001 atm

V = 28.3 cm³

T = 25 °C

R = 8.31 jK⁻¹mol⁻¹

PV = nRT

n = RT / PV

n = 8.31 x 25 / 1.001 x 28.3

n = 7.28 moles

Thus, the moles of H2 are contained in a balloon that contains hydrogen and water vapor, has a volume of 28.3 cm3 at 25.0oc and a total pressure of 1.001 atm is 7.28 moles.

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V2 = 2.499 2.5 L is the sample's volume when its temperature is raised to 30 °C and its pressure is lowered to 90 kilopascals.

What does the word "volume" actually mean?

The volume of an item is the space occupied inside its three-dimensional boundaries. A other word for it is the object's capacity.

What is the volume of the liquid?

The volume of liquid measured in a vessel's standard units is known as the liquid measurement. Infant milk bottle with milliliter measurement indications and juice bottle with a 1 liter capacity are two examples of vessels that have a "capacity" or "volume."

As,

Gas constant R is constant, so, Ideal gas equation can be written as,

                                        P₁ V₁ / T₁  =  P₂ V₂ / T₂

Solving for V₂,

                                          V₂  =  (P₁ × V₁ × T₂) ÷ (T₁ × P₂)

Putting Values,

                             V₂  =  (101.325 KPa × 2 L × 303 K) ÷ (273 K × 90 KPa)

                             V₂  =  61402.95 ÷ 24570

                             V₂  =  2.499 ≈ 2.5 L

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Answer: 1.289 g/ml

Explanation:

density= m/v

m=10.8405

v=8.41

10.8405/8.41

d= 1.289 g/mL

Prokaryotes are about the size of a eukaryotic cell. Prokaryotes are one of the two main types of cell; the other is eukaryotes. Prokaryotes lack a nucleus and membrane-bound organelles.

The DNA in their genome is located in the cytoplasm and arranged in a single, circular chromosome. Prokaryotes are the simplest and most primitive form of cellular life and represent the first form of life to appear on Earth. Prokaryotic cells and eukaryotic cells differ greatly in size. Prokaryotic cells are smaller than eukaryotic cells, with a typical size range of 0.1 to 5.0 µm.

Eukaryotic cells, on the other hand, have a typical size range of 10 to 100 µm. In comparison to eukaryotic cells, prokaryotic cells have a relatively small amount of cytoplasm and lack many of the membrane-bound organelles found in eukaryotic cells. Eukaryotic cells, by contrast, have a complex internal structure, with many specialized organelles that perform specific functions. Prokaryotes are known for their ability to survive in extreme environments and are found in a wide range of habitats, including soil, water, and even inside other organisms. They play an essential role in the global ecosystem, as they are involved in nutrient cycling and other important processes.

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These orbital configurations represent the arrangement of electrons within the different energy levels and subshells of the respective elements.

The orbital configurations of the given elements are as follows:

Helium: 1s² - Helium has two electrons that occupy the 1s orbital.

Nitrogen: 1s² 2s² 2p³ - Nitrogen has two electrons in the 1s orbital, two electrons in the 2s orbital, and three electrons in the 2p orbital (specifically, 2p³ indicates three electrons in the 2p subshell).

Silicon: 1s² 2s² 2p⁶ 3s² 3p² - Silicon has two electrons in the 1s orbital, two electrons in the 2s orbital, six electrons in the 2p orbital, two electrons in the 3s orbital, and two electrons in the 3p orbital (specifically, 3p² indicates two electrons in the 3p subshell).

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Answer:

1.) Write 2 points of difference between water molecule and hydrogen molecule.

• Water molecule associates through hydrogen bonding while hydrogen molecule associates through weak vanderwaal's forces of attraction.

• Water molecule is heavier with greater molecular mass [ 18 grams ] than hydrogen molecule [ 2 grams ].

2.) Differentiate between homogeneous and heterogeneous mixture.

• Homogeneous mixture is a mixture where molecules combine uniformly and adhesive forces are greater than cohesive forces while heterogeneous mixture is a mixture where molecules are non-uniformly combined and cohesive forces are greater than adhesive forces.

\(.\)

Answer:

This is just my guess, but since opposites attract, then im guessing that alikes repel each other. So, they will go away from each other when the ball is released (I think).

Explanation:

Hope this helps! If it did, please mark it as brainliest! It would help a lot! Thanks! :D

Answer:

true

Explanation:

Answer:

is matter

Explanation:

Answer: biology is the study of life

Source:trust me bro

Answer: sodium-11   iron-26   sulfur-16

Explanation:

Answer:

sodium:11

iron:26

sulfur:16

Explanation:

pls..give..brainlist...to the..above..person..thx..u

Answer:

meter. 1.5×10^-6

Litter. 2×10^-5

Kilo Gram. 1.7

Kilo Gram. 3.4 ×10^-3

I hope you understood that and if you don't understand write in comments

An iso-osmotic solution is about 300 mosm (milliosmoles) or approximately equal to the osmolarity of human body fluids.

An iso-osmotic solution refers to a solution that has the same osmotic concentration as another reference solution or the surrounding fluid. Osmotic concentration is a measure of the solute concentration in a solution and is typically expressed in terms of osmoles or milliosmoles per liter.

In the context of human body fluids, the osmolarity (osmotic concentration) is generally around 300 milliosmoles per liter (mosm/L). This means that an iso-osmotic solution would have an osmolarity close to 300 mosm/L, resembling the osmotic concentration of body fluids.

The concept of iso-osmotic solutions is important in various biological processes. For instance, in medical settings, intravenous (IV) fluids with an osmolarity similar to that of body fluids are often administered to prevent adverse effects on cells and maintain fluid balance.

By maintaining an iso-osmotic environment, cells can regulate the movement of water and solutes across their membranes, ensuring proper functioning and avoiding detrimental changes in cell volume.

Overall, an iso-osmotic solution has an osmolarity comparable to the reference solution or body fluids, facilitating appropriate fluid balance and minimizing disruptive effects on cells and tissues.

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Answer:

Ionic compounds are crystalline solids, soluble in water and conduct electricity when molten or in solution. These characteristics are due to the type of link that holds them together.

Answer:

C/the third one

Explanation:

it’s correct

Answer:

D. 24.98

Explanation:

23.985+24.9858+25.9826=74.9534÷3=24.9844666667

rounded to nearest hundredth=24.98

1.84 x 10^(-9) g (or 1.84 ng) of NaOH to give a pH of 11.5 in a 14.5 L tank of water.

To find the mass of NaOH needed to give a pH of 11.5 in 14.5 L of water, we first need to calculate the concentration of hydroxide ions (OH-) required to achieve that pH.

The pH of a solution is defined as the negative logarithm of the hydrogen ion (H+) concentration, so we can write:

\(pH = -log[H+]\)

We can rearrange this equation to solve for [H+]:

\([H+] = 10^(-pH)For a pH of 11.5, we have:[H+] = 10^(-11.5) = 3.16* 10^(-12) M\)

Since NaOH is a strong base that completely dissociates in water, we know that the concentration of hydroxide ions will be the same as the concentration of NaOH we add.

Therefore, we can calculate the amount of NaOH needed using the following equation:

\(moles of NaOH = volume of water (in L) * desired [OH-] concentration (in M)moles of NaOH = 14.5 L * 3.16 * 10^(-12) M = 4.59 * 10^(-11) mol\)

Finally, we can convert moles of NaOH to grams using the molar mass of NaOH:

\(mass of NaOH = moles of NaOH * molar mass of NaOHmass of NaOH = 4.59 x 10^(-11) mol* 40 g/mol = 1.84 * 10^(-9) g\)

Therefore, we need 1.84 x 10^(-9) g (or 1.84 ng) of NaOH to give a pH of 11.5 in a 14.5 L tank of water.

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We can see here that if the number of individuals that are added to a population is close to the number of individuals that are removed, the population size will generally remain relatively stable. This is because the rate of population growth is balanced by the rate of population decline.

Population refers to a group of individuals of the same species that inhabit a particular geographic area and can potentially interbreed. In the context of biology and ecology, population is a fundamental concept that helps describe and understand the dynamics of living organisms.

A population can refer to a wide range of organisms, including animals, plants, or microorganisms, and it is often characterized by its size, density, distribution, and composition.

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