Object is irregularly shaped solid and it is dropped into a graduated cylinder and it displays 25 mL of water and has a mass of 30 g what is the density of the irregular shaped object

Answer:

Explanation:

The law of conservation of mass states that mass is neither created nor destroyed during a chemical reaction. This can be gleaned from the third postulate in Dalton's series. Magnesium oxide decomposes into magnesium and oxygen. If 4.03 g of magnesium oxide decomposes to form 2.43 g of magnesium, what mass of oxygen gas is also released in the reaction

The word say magnesium oxide decomposes to magnesium and oxygen

the chemical symbols say

MgO-----------> Mg + O2  (since natural oxygen is diatomic)

the balanced  equation says

2MgO-------------->2Mg + O2

4.03 gm----------> 2.43 + ?0 gms

tour high school Algebra I class says

? = 4.03 -2.43 =1.60

your chemical analytcal lab says %mO in MgO = 16/40.3 = 39.7%

your calculator says

39.7/100 X 4.03 = 1.60

all of these prove the law of conservation of mass

When each combination of chemicals is combined, a homogeneous solution of H2O Cl2 and H2O results.

Because its various components are not evenly blended, milk is a heterogeneous mixture. When milk is put into a glass and fat globules rise to the top, these components can be seen.

A mixture is said to be homogenous if its composition is constant throughout. Because the dissolved salt is evenly distributed throughout the whole salt water sample, the salt water described above is homogenous. If the particles of two or more components interact with one another, the result is a homogenous mixture or solution. When the intermolecular forces of attraction between them are similar, they interact.

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"Sam is being a good digital citizen by following a code of conduct.

A code of conduct is a set of rules that govern how people should behave online. It is important to follow a code of conduct because it helps to create a safe and respectful environment for everyone.

Here, Sam is following the code of conduct for his gaming group. This code of conduct may include rules about using offensive language, cheating, and griefing. By following these rules, Sam is helping to create a positive experience for everyone in his gaming group.

Therefore, Sam is following the code of conduct.

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Answer:

\(m=1.325gNa_2CO_3\)

Explanation:

Hello,

In this case, by considering the given seminormal solution, we infer it is a 0.5-N solution which means that we can obtain the equivalent grams as shown below for the 55 cc (0.055 L) volume:

\(eq-g=0.5eq-g/L*0.050L=0.025eq-g\)

Next, since sodium carbonate has two sodium ions with a +1 oxidation state each, we can obtain the moles:

\(mol=0.025eq-gNa_2CO_3*\frac{1molNa_2CO_3}{2eq-gNa_2CO_3}\\ \\mol=0.0125molNa_2CO_3\)

Finally, the mass is computed by using its molar mass (106 g/mol)

\(m=0.0125molNa_2CO_3*\frac{106gNa_2CO_3}{1molNa_2CO_3} \\\\m=1.325gNa_2CO_3\)

Regards.

Answer:

Ionic bond.

Explanation:

Group 7 elements like Bromine (Br) and group 2 elements like Magnesium,(Mg) involved loss and gain of electrons which is typical with Ionic bonding.

0.6 is the equilibrium constant for the given reaction.

To calculate the equilibrium constant (K) for the given reaction, we need to use the molar concentrations of the reactants and products at equilibrium. The equilibrium constant expression is given by:

\(K= [H_{2}O]^{2} / ([H_{2}^{2} * [O_{2}])\)

Given the moles of H2, O2, and H2O in the 8.1 L container, we can convert them to molar concentrations by dividing the number of moles by the volume:

[H2] = 1.83 moles / 8.1 L

[O2] = 2.33 moles / 8.1 L

[H2O] = 3.95 moles / 8.1 L

Substituting these values into the equilibrium constant expression, we have:

K = \((3.95 / 8.1)^{2}\) / (\((1.83 / 8.1)^{2}\) * (2.33 / 8.1))

Evaluating this expression and rounding to one decimal place, we find the equilibrium constant to be:

K ≈ 0.6

Therefore, the equilibrium constant for the given reaction is approximately 0.6.

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Answer:Exposure to extremely high levels of americium, as has been reported in some animal studies, has resulted in damage to organs such as the lungs, liver, kidneys, and thyroid. It is rare, however, that a person would be exposed to amounts of americium large enough to cause harmful effects in these organs.

Explanation:

Some types of solids that are insoluble in water are:

Many solids are insoluble in water, meaning they do not dissolve in water to a significant extent. Here are some examples of common solids that are generally insoluble in water:

Metals: Most metals, such as gold, silver, platinum, and copper, are insoluble in water.

Non-Metallic Elements: Many non-metallic elements, such as carbon (in the form of graphite or diamond), sulfur, phosphorus, and iodine, are insoluble in water.

Metal Oxides: Some metal oxides, particularly those of less reactive metals, are insoluble in water. Examples include aluminum oxide (Al2O3), iron(III) oxide (Fe2O3), and lead(II) oxide (PbO).

Metal Carbonates: Most metal carbonates are insoluble in water. Examples include calcium carbonate (CaCO3), lead(II) carbonate (PbCO3), and copper(II) carbonate (CuCO3).

Metal Sulfides: Many metal sulfides are insoluble in water. Examples include lead(II) sulfide (PbS), silver sulfide (Ag2S), and mercury(II) sulfide (HgS).

Insoluble Salts: Certain salts have limited solubility in water. Examples include silver chloride (AgCl), lead(II) iodide (PbI2), and calcium sulfate (CaSO4).

It's important to note that while these solids are generally insoluble in water, they may exhibit some solubility to a small extent. The solubility of a solid in water can vary depending on factors such as temperature, pressure, and the presence of other solutes.

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Answer:

math si hard

Explanation:

The mole fration of ethanol and water in a sample of rectified spirit which contains 95% of ethanol by mass is 0.8 and 0.11.

Mole fraction of any substance will be calculated by dividing the moles of that substance from the total moles of the solution.

Moles (n) will be calculated as:

n = W/M, where

W = given mass

M = molar mass

Given that 95% of ethanol by mass is present in the sample, so 95g of ethanol is present in 100g of solution.

Mass of solvent (water) = 100 - 95 = 5g

Moles of water = 5g / 18g/mol = 0.27mol

Moles of ethanol = 95g / 46g/mol = 2.06mol

Mole fraction of water  = 0.27 / (0.27+2.06) = 0.11

Mole fraction of ethanol = 2.06 / (0.27+2.06) = 0.8

Hence required mole fraction of water & ethanol is 00.11 and 0.8 respectively.

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The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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Above the sea, warm air rises then cools and sinks is due to convection. Therefore, option (D) is correct.

Convection can be described as the process of heat transfer through the bulk movement of molecules within fluids. The heat transfer between the object and the fluid occurs through conduction, but the bulk heat transfer occurs due to the motion of the fluid.

Convection can be defined as the process of heat transfer in fluids by the actual motion of matter. It occurs in liquids and gases. It may be forced or natural and involves a bulk transfer of the fluid.

The sun with its radiation heats up both the sea surface and land. Sea has a more heating capacity, it absorbs much energy but gets warmed slower than the land. Temperature above the land rises and the air in the atmosphere above it gets warm.  Warm air is less dense and the difference in air pressure leads the air to flow from sea to land.

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The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO\(_2\) and water is equal to the energy required to break the bonds of sugar and oxygen. Therefore, the correct option is option A.

Cells turn sugars into energy through a process called cellular respiration. Cells need fuel or an electron acceptor to power the chemical process that converts energy into usable forms such as ATP along with additional kinds of energy that can be utilised to power cellular reactions.

All multicellular species, including eukaryotes, as well as certain single-celled organisms, generate energy by aerobic respiration. Utilising oxygen, which is the strongest electron acceptor found in nature, is called aerobic respiration. The process of cellular respiration releases energy because the energy that is released when the bonds are formed in CO\(_2\) and water is equal to the energy required to break the bonds of sugar and oxygen.

Therefore, the correct option is option A.

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This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

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These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Option B)

A colloid is a type of mixture in which particles are dispersed throughout a medium, creating a homogeneous appearance. Unlike solutions, where the particles are completely dissolved, and suspensions, where the particles settle out, colloids have particles that are larger than those in solutions but smaller than those in suspensions. One characteristic of colloids is that they can scatter light due to the size of the particles. This scattering of light is known as the Tyndall effect. Examples of colloids include milk, fog, and aerosol sprays. These substances have dispersed particles that are large enough to scatter light, making the beam visible. Therefore, out of the options provided, a mixture that scatters light is an example of a colloid. Therefore option B) is correct

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Note Complete Question

which is an example of a colloid?

a mixture that settles out,

b mixture that scatters light,

c mixture that is separated by filtration,  

d salt and water mixture?

Answer: A filter press is an efficient and economical machine for liquid/solid separation. ... The Slury – in a filter press operation the slurry is pumped into the chamber and against the filter media. The Filtrate – the liquid passes through the filter cloth and exits via the filter plate's filtrate ports.

Hope this helps... Stat safe and have a great day...

Answer:

So cute and my favorite is Lion and ot is my inner pet with my zodiac sign so cute hehe

1. It is also known as the dark reaction of photosynthesis: Off.

2. Primary acceptor of carbon is Photosystem I and II: On.

3. Site of the process is in the stroma: Off.

4. Photolysis of water does not occur: Off.

5. Process type is both cyclic and non-cyclic processes: On.

6. It is a release of oxygen that gives off aldehydes and hydrogen upon dehydrogenation: On.

7. It is a process that converts solar energy into chemical energy: On.

8. It is a light dependent process: On.

9. Process type is cyclic only: Off.

10. Primary acceptor of carbon is Rubiscobisphosphate: Off.

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Answer:

potassium

Explanation:

potassium called nutral hence he is not

metal

Krypton, Chromium, and Oxygen with the following symbols Kr-13, Cr-2, and O-15 respectively have 23 electrons.

The atomic number of an atom determines the number of electrons it has. When the number of protons is equivalent to the number of electrons, the atom is electrically neutral. An anion, on the other hand, is an atom with a negative charge. It has gained an electron or two, or even more. Below are the chemical symbols for three different atoms or atomic anions with 23 electrons.Krypton:Kr has an atomic number of 36, indicating that it has 36 electrons. However, if we add 13 electrons to it, the total number of electrons becomes 49. Krypton with 13 additional electrons becomes Kr-13, with a total of 49 electrons.Chromium:Cr has an atomic number of 24, indicating that it has 24 electrons. Adding two more electrons to it, the total number of electrons becomes 26. The atomic anion with 26 electrons is Cr-2.Oxygen:Oxygen has an atomic number of 8, indicating that it has 8 electrons. However, if we add 15 electrons to it, the total number of electrons becomes 23. Oxygen with 15 additional electrons becomes O-15, with a total of 23 electrons.

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Fourteen electrons can be represented with the aid of the values n = four and l = 3. The maximum wide variety of electrons that could have the two values for n and ml is four. for this reason, the wide variety of electrons found in the n = 2 shell is 8 electrons.

n = four, `m_(l) = +1` manner 4p-subshell that could have maximum 6 electrons.As the handiest 2 electrons can be found in an orbital, so simplest 2 electrons in an atom can have this set of quantum numbers. How do you already know which atom has the quantum numbers n=three, l=2, ml=-2, m2=-half?

No. of electrons = 32  total wide variety of electrons with `m_(s)=(-1)/2` could be sixteen. grade-by-grade answers via professionals that will help us ensure clearance & score brilliant marks in assessments.

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Answer:

swap

Explanation: because it is a low wet land

Answer:

4.   swamp

5.   Island

Plz mark brainliest:)

Answer:

0.67 moles of NH3 are required to react with 32.2 grams of O2.

Explanation:

To find the number of moles of NH3 required to react with 32.2 grams of O2, you will need to balance the chemical equation for the reaction and use the balanced equation to determine the mole ratio between the reactants.

The balanced equation for the reaction of NH3 with O2 is:

2 NH3 + 3 O2 -> 2 N2 + 6 H2O

From this equation, we can see that for every 2 moles of NH3 that react, 3 moles of O2 are also consumed. Therefore, the mole ratio between NH3 and O2 is 2:3.

Since we are given the mass of O2 in grams and we want to find the number of moles of NH3, we can use the molar mass of O2 to convert the mass to moles. The molar mass of O2 is 32.0 g/mol. Therefore, 32.2 grams of O2 is equivalent to 32.2 / 32.0 = 1.00625 moles of O2.

To find the number of moles of NH3 required, we can use the mole ratio to convert from moles of O2 to moles of NH3. Since the ratio is 2:3, we can multiply the number of moles of O2 by (2/3) to find the number of moles of NH3:

1.00625 moles O2 * (2 moles NH3 / 3 moles O2) = 0.67 moles NH3

This means that 0.67 moles of NH3 are required to react with 32.2 grams of O2.

Answer:

The correct solution is "3.535 × 1018 molecules".

Explanation:

The given values are:

Molar mass

= 322.0 g/mol

Dioxin constitute to 63 kg individual will be:

= \(0.03 \ mg\times 63\)

= \(1.89 \ mg\)

⇒  \(mole=\frac{mass}{molar \ mass}\)

             \(=\frac{ 1.89\times 10^{-3}}{322}\)

             \(=5.87\times 10^{-6} \ mol\)

So,

The number of molecules will be:

= \(mole\times Na\)

= \(5.87\times 10^{-6}\times 6.022\times 1023\)

= \(3.535\times 1018\) (molecules)

Answer:

Yes it is because heating expands molecules of solution which helps to form a solution as it acts as solvent solution.

Explanation:

According to the provided orbital diagram, Hund's Rule looks to be the electron rule that is broken. According to Hund's rule, when degenerate orbitals with equal energy are accessible, electrons will first fill them individually before doing so in pairs.

While it should have been singly occupied in a distinct 2p orbital before partnering up, the second electron in the 2p orbital in the following diagram is paired with the first electron. Therefore, B. Hund's Rule is the appropriate response.

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Name of [Cu[NH3)2] please fast

1. First name the ligand (ammine-NH3) using prefix (tetra-4) to designate number of ligands.

2. Name the central atom (copper-Cu) followed by its oxidation state (ii) in roman letter using suffix ion(since it is not neutral entity).

Explanation:

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Answer:

The property of metals that is the result of light reflecting off the electrons is

A.  shiny

The property of metals that is the result of light reflecting off the electrons is shiny. Hence, option A is correct.

The ability of a material to shine is called lustre. Gold, silver and other metals are examples of lustrous substances.

Metals are readily identified by their most common physical property, the ability to reflect light, known as lustre.

The property of metals that is the result of light reflecting off the electrons is shiny. Hence, option A is correct.

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water acts as the solvent for this experiment

we use to calculate R f values and compare with know to determine the compound is made of example in forensic science to find DNA, amino acids

most soluble one will travel the most

c to b to a (A most further travelled)

Explanation:

This quest in requires general knowledge on chromatography

Answer:

x/2

Explanation:

X = 2 molecules of H2

For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.

I hope I'm understanding this question right.