A student uses the apparatus shown in the diagram below to measure the volume of carbon dioxide gas made when different masses of marble chips are added to 25 cm of dilute hydrochloric acid.
Which other items of apparatus are needed?​

Answer:

3.3

Explanation:

the heat is hit and the hot is cold.so thats why

A chemical combination of matter in definite (fixed) proportions is called a compound. Compounds are formed when two or more different elements chemically combine in fixed proportions to form a new substance.

The proportions of the elements in a compound are always the same, which gives them their characteristic properties. Pure substances can be either elements or compounds, while physical mixtures consist of two or more substances that are physically combined, but not chemically bonded. An emulsion is a type of physical mixture where two immiscible liquids are mixed together with the help of an emulsifying agent.
A chemical combination of matter in definite (fixed) proportions is called a(n): compound. A compound consists of two or more elements combined in a specific ratio, resulting in a new substance with unique properties. This differs from a physical mixture or an emulsion, which involve mixing substances without a fixed proportion or forming new substances. A pure substance can either be an element or a compound, but in this case, the term "combination" indicates a compound specifically.

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The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2

Bond order = (8 - 5) / 2

Bond order = 1.5.

This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

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Answer:

Volume of the marble is 16 ml.

Initial volume present in graduated cylinder=45 ml.

Final volume in graduated cylinder after marble is dropped=61 ml.

Volume of water displaced=volume displaced by marble.

Volume displaced by marble=final volume in cylinder-initial volume in cylinder

Volume displaced=61ml-45ml=16ml

So volume of marble=16ml.

Answer:

16mL

Explanation:

A. Gamma rays and X-rays are ionizing radiation that are approved for use on foods.

They are often used to kill bacteria and other microorganisms that can cause food spoilage, as well as to extend the shelf life of certain foods.

Gamma rays and X-rays have enough energy to remove electrons from atoms or molecules, which can break chemical bonds and destroy the microorganisms present on the food.

C. Sun rays and D. microwaves are not ionizing radiation and are not approved for use on foods in the same way that gamma rays and X-rays are.

Sun rays can have ionizing radiation at high altitude but not the levels we see at the surface of the earth. Microwaves are non-ionizing radiation and are primarily used to heat food, but not to sterilize or preserve it.

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Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

The molar mass of  tin(II) chloride is: 84.9 g

Calculate the molar mass of  tin(II) chloride?

The number of moles n1 is thus:

n1= m1/M1 = 2.25 mol

According to the balanced reaction, the ratio by number of moles n of tin(II) chloride produced to the number of moles n1 of HF used is 1:2

As such, the number of moles of tin(II) chloride produced is :

n = 1/2 \(n_{1}\) = 0.45 mol

The molar mass of tin(II) chloride is:

M= A\(_{r}\)(Sn)+2A\(_{r}\)(Cl) = 188.7 g/mol

The mass m produced is thus:

m = nM

= 0.45 mol × 188.7 g/mol

≈ 84.9 g

Therefore, the molar mass of  tin(II) chloride is: 84.9 g.

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Answer:

I think it would take her 25 Seconds

Explanation:

To calculate how long it would take for Sarah, I did 200 divided by 8. When I did that, I got 25 as my answer. I'm not exactly sure if it would be in seconds or minutes, but I feel that seconds is more reasonable. I hope this helps, and I hope it's not wrong, but I do not think it is.

Answer:

1.00310 rounded up to it's nearest is the equivalent to 1.0031. hence

c. 8.66

Answer:

d. Bar graph

Explanation:

a. Line graph  - this type of graph is best for continuous data, such as how a the sales of a particular cereal drop over time

b. Pie chart  - this is best for % data, such as looking at the % of different nutrients (carbohydrates, fats, proteins) in a cereal

C. Stem-and-leaf plot  - presents quantitative data such as the ages of people who buy a brand of cereal

d. Bar graph - this is best for plotting different numbers in distinct categories to compare them to one another  

A plumber would likely pronounce the word unionized as "YOON-yun-ized," as in being a member of a labor union. A chemist would probably pronounce it "un-EYE-on-ized."

We must first comprehend the definition of ionized in order to comprehend the meaning of unionized. Ionization occurs when a molecule or atom picks up a positive or negative charge. When it gets or loses electrons, this can occur. Other than through gaining or losing electrons, acids and bases can also split into charged particles to become ionized.

Change occurs as HCl dissolves in water. Chlorine preserves both of the shared electrons even though the hydrogen splits from it. The hydrogen ion is now left without any electrons, leaving it with a net positive charge. The chloride ion gains a net negative charge as a result of its involvement. HCl divides into ions in this manner without really acquiring or losing electrons.

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Answer:

Properties of transition elements

they are all metals and that most of them are hard, strong, and lustrous, have high melting and boiling points, and are good conductors of heat and electricity.

Answer:

5.47 x 10^23 atoms in Ag (sliver)

Explanation:

0.909 mol of Ag x 6.02 x 10^23 atoms of Ag/ 1 mol of Ag

The task is to write a condensed structural formula for an n-alkane with the given molecular formula.An n-alkane is an unbranched alkane.CH3(CH2)2​6​CH3.

Alkanes, alkenes, alkynes, & aromatic hydrocarbons are the four subcategories that are typically used to classify hydrocarbons. These compounds might have relatively basic structures or relatively complicated ones.

Typically, hydrogen atoms form a protective shell around carbon atoms to form molecules.Hydrocarbons are categorized into four primary groups: alkanes, alkenes, alkynes, and aromatic hydrocarbons.

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In contrast to C3 plants, C4 plants have a different leaf structure and metabolic process. Carbon dioxide is first fixed in mesophyll cells of C4 plants.

where it is then transported to bundle sheath cells where it is broken down to release CO2 for the Calvin cycle. The key distinction between C4 and C3 plants is the division of carbon fixation and the Calvin cycle into various cells. C4 plants are more common in arid and semi-arid areas because they are more effective at photosynthesis in hot and dry conditions. In a typical C4 plant, the Calvin cycle and the first fixation of carbon dioxide take place in separate cells, the mesophyll cells, and the resulting four-carbon molecule is then transported to the bundle sheath cells in a C3 plant.

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Answer:

bromine

Explanation:

Answer:

To determine the limiting reactant, you need to compare the amount of each reactant with the amount required to react completely with the other reactant. The reactant that runs out first is the limiting reactant.

In this case, the balanced equation for the reaction between MgSO4 and NH3 is:

MgSO4 + 2 NH3 → Mg(NH2)2SO4

From the balanced equation, we can see that 1 mole of MgSO4 reacts with 2 moles of NH3. Therefore, 3.7 moles of MgSO4 will react with (3.7 moles)(2 moles NH3/1 mole MgSO4) = 7.4 moles of NH3.

4.8 moles of NH3 is less than 7.4 moles, so NH3 is the limiting reactant.

Uday Tahlan

Answer:

Explanation:

Answer:

If the reaction requires energy, it is often indicated above the arrow. A capital Greek letter delta (Δ) is written on top of the reaction arrow to show that energy in the form of heat is added to the reaction; hv is written if the energy is added in the form of light.

Answer:

it means that to get the product, the reactants were heated

The command that provides a detailed query about drives and volumes in Windows operating system is the "diskpart" command.

Diskpart is a command-line utility that allows users to manage disks, partitions, and volumes in Windows operating systems. By using the "list disk" command in diskpart, users can obtain a detailed list of all the physical disks attached to their computer, along with their size, status, and other relevant information. Similarly, by using the "list volume" command, users can obtain a detailed list of all the volumes on their computer, including their size, status, and file system type. Furthermore, diskpart also allows users to create, delete, and resize partitions, as well as to assign or change drive letters for their volumes. Overall, the diskpart command provides a powerful tool for managing and troubleshooting disks and volumes on Windows operating systems.

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A 7.26 × \(10^{-2}\)  M aqueous solution of chromium(II) iodide, \(CrI_{2}\), is hypertonic to red blood cells.

1. Red blood cells are typically isotonic with solutions that have an osmolarity of approximately 0.3 Osm/L (300 mOsm/L), which corresponds to a 0.15 M NaCl solution.
2. To determine the osmolarity of the \(CrI_{2}\) solution, we must first identify the number of particles (ions) that will be released into the solution when it dissolves. In this case, one \(CrI_{2}\) molecule dissociates into one \(Cr^{2+}\) ion and two I- ions.
3. Next, multiply the molarity of the \(CrI_{2}\) solution (7.26×\(10^{-2}\) M) by the number of ions it dissociates into (1 + 2 = 3 ions). This gives us an osmolarity of 7.26×\(10^{-2}\) M × 3 = 2.178×\(10^{-1}\) Osm/L (217.8 mOsm/L).

4. Compare the osmolarity of the \(CrI_{2}\) solution to that of red blood cells (217.8 mOsm/L vs. 300 mOsm/L). Since the \(CrI_{2}\) solution has a higher osmolarity, it is hypertonic to red blood cells.

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The number of air molecules in a volume of 1.00 cm3 under the conditions of the vacuum pump is 3.65 * 10-15 moles and those that would be present at the same temperature but at 1.00 atm would be 0, 04 moles

The vacuum pump is a device that extracts gas molecules from a sealed volume, to create a partial vacuum, and is frequently used in industry, especially food.

To perform both calculations considering air as an ideal gas, the equation PV = nrt is used, in which

P = Pressure

V = Volume

n = number of moles

R = Gas constant

t = temperature

Data

t = 300K

V = 1L

P = 9.00 * 10-14 atm

R = 0.082 L Atm / mol °K .

n = ?

PV = nrt

n = PV/rt

n = 9.00 * 10-14. 1 / 0.082 . 300

n = 9.00 * 10-14 / 24.6

n = 3.65 * 10-15 moles

Data

t = 300K

V = 1L

P = 1 atm

R = 0.082 L Atm / mol °K .

n = ?

PV = nrt

n = PV/rt

n=1. 1 / 0.082 . 300

n = 1 / 24.6

n = 0.04 mole

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True. An alloy is a solid solution consisting of two or more metallic elements, or a metallic element and a non-metallic element.

The properties of an alloy are usually different from those of its constituent elements. The reason for this is that the atoms of different elements in an alloy interact with each other differently than they would if they were in their pure elemental form. This interaction can lead to changes in the electronic and crystal structure of the alloy, which in turn can affect its physical and chemical properties. Some common examples of alloys include brass (copper and zinc), stainless steel (iron, chromium, and nickel), and bronze (copper and tin).

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Complete question:

An alloy is a mixture of elements that has metallic properties. True or False

NAD+/NADH is the cofactor that participates directly in most of the oxidation-reduction reactions in the fermentation of glucose.

A chemical reaction is a method wherein one or more materials, also called reactants, are transformed into at least one or more special substances, called merchandise. Materials are both chemical elements or compounds.

A few synthesis reactions can result in more than one product. Photosynthesis is one of the maximum important chemical reactions on earth.

Chemical compounds are made from atoms of different elements, joined collectively through chemical bonds. A chemical synthesis normally involves the breaking of existing bonds and the formation of recent ones.

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The molecule that is NOT part of the thin filament is titin.

The other molecules listed, actin, troponin, and tropomyosin, are all part of the thin filament.

Myofilaments mostly come in two varieties. The two types of filaments are thin filaments and thick filaments.

The thin filaments have a diameter of 7-9 nm. They are joined to the striated muscle's z discs.

Actin, troponin, and tropomyosin are the three proteins that make up each thin filament.

However, the primary protein in the thin filament is actin.

The helical strands of the thin filament, now known as F actin (being fibrous), are made up of 300–400 globular actin molecules that are joined end to end. During the contraction phase, a myosin cross-bridge or head can bind to each actin molecule. Troponin is an additional protein found in the thin filament.

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For units of volume: 1 milliliter is about the volume of a raindrop. 1 cup is about the volume of a school milk carton.

The volume occupied by an object in three dimensions is calculated. It is often quantified mathematically using SI-derived units, such as the cubic meter and liter, or other imperial measures (such as the gallon, quart, cubic inch). The definitions of volume and length have a connection (cubed). Usually, the volume of a container is thought of as its capacity, or the amount of fluid (gas or liquid) that it could hold, rather than the amount of space the container takes up.

Ancient societies used standardized containers, which were later formed from naturally occurring containers, to compute volume. Several three-dimensional shapes have simple mathematical formulas that can be used to calculate their volumes.

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Answer: A.En Hedu'Anna

Answer:

En Hedu’Anna!

Explanation:

The addition of water vapor to the system will not directly affect the amount of N₂ produced in the given reaction.

The balanced equation shows that the production of N₂ is determined by the stoichiometry of the reactants, namely 4 moles of ammonia (NH₃) reacting with 3 moles of oxygen (O₂) to produce 2 moles of nitrogen gas (N₂). The presence of water vapor (H₂O) does not participate in the reaction as a reactant or a product. Therefore, the amount of N₂ formed will remain the same regardless of the presence or addition of water vapor.

However, it is worth noting that the addition of water vapor may indirectly affect the reaction by altering the conditions or equilibrium of the system. For example, the presence of water vapor could influence the reaction kinetics, the temperature, or the concentration of reactants. These factors could potentially impact the rate of the reaction or the position of the equilibrium, which might have an indirect effect on the final amount of N₂ produced. But without specific information about the conditions and the influence of water vapor, it cannot be determined how the amount of N₂ will be affected in this particular scenario.

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