Counting Atoms and Elements in a Chemical Formula (8. 5D)

Answer:

The mass of one Nitrogen molecule is option C

The drop of RBCs placed in the 300 millimolar solution of CaCl2 would cause the RBCs to shrink. The answer is A) The RBCs would shrink.

This is because the solution is hypertonic, meaning it has a higher solute concentration than the RBCs. As a result, water will move out of the RBCs to try to equalize the concentration of solutes on both sides of the membrane. This will cause the RBCs to shrink in size as they lose water. The Ca2+ ions in the solution can also interact with the negatively charged phospholipid heads in the RBC membrane, causing the membrane to become more rigid and less flexible, further contributing to the shrinkage of the RBCs.

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Answer:

I think it's C but I'm atlessy 60% sure :]

The mass percent of sucrose in solution is 5.19%

The concentration of an element in a compound or element of a combination can be expressed as a mass percentage. The mass percent of the element in the compound is obtained by dividing the mass of the element in 1 mole of the compound by the molar mass of the compound, which is then multiplied by 100. Plants including fruits, vegetables, and nuts all contain varying amounts of sucrose, a naturally occurring sugar. Commercial production of sucrose is also carried out together with sugar cane and sugar beets.

Calculating,

Mass Percent = Mass Solute/(Mass Solute + Mass Solvent) X 100%

1 g H2O = 1 mL H2O = 59.3 mL H2O = 59.3 g H2O

Mass Percent = 3.25g / (3.25 g + 59.3 g) X 100% = 5.19%

The solution is 5.19%% sucrose by mass.

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The mass of oxygen is 128 g

Given that a sample of gas consists of oxygen (molecular mass 32.0 g/mol) and neon (20.0 g/mol). The sample has a mass of 226 g and contains a total of 8.00 moles of gas. We are required to find the mass of oxygen in the sample.

Let us suppose that the number of moles of oxygen is x. Now, we know that the total number of moles of gas is 8 moles. Therefore, the number of moles of neon is (8 - x).

Molar mass of oxygen = 32 g/mol

We can calculate the mass of oxygen from the number of moles of oxygen and molar mass of oxygen as follows:

Number of moles of oxygen × Molar mass of oxygen = Mass of oxygenx × 32 = Mass of oxygen

Let us find the mass of oxygen:

Mass of neon = Total mass of gas – Mass of oxygen

226 – Mass of oxygen = Mass of neon

226 – Mass of oxygen = (8 – x) × 20

Simplifying the equation:

226 – Mass of oxygen = 160 – 20x + x

226 – Mass of oxygen = 160 – 19x

Mass of oxygen = 66 – 19x

The total number of moles of gas is 8 moles

Hence, Number of moles of oxygen + Number of moles of neon = Total number of moles of gasx + (8 - x) = 8⇒ 8 = 8Therefore, the value of x = 4

We can calculate the mass of oxygen as follows:

Number of moles of oxygen × Molar mass of oxygen = Mass of oxygen

4 × 32 = 128 g

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Answer:

Often, chemical changes in the water might result in the release of different minerals such as salt or calcium carbonate. Pressure and heat in the process of creating metamorphic rock can also result in the formation or transformation of minerals.  Minerals in igneous rocks often form where magma has cooled over time.

Explanation:

Minerals only form in certain areas due to presence of specific environment.

Minerals only form in certain areas because of the presence of suitable environmental condition for it. Every mineral needs specific environment for its formation. Without that specific temperature, pressure and some other factors, the mineral can't formed.

Every mineral needs specific environment for its formation which is different from one another so we can conclude that mineral formation needs particular environmental conditions.

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Answer:

Ca₃N₂

Explanation:

The empirical formula is the simplest whole-number ratio between moles of each element present in a molecule.

Thus, we need to convert mass of each atom to moles and find the ratio between these as follows:

Moles N:

1.46g * (1mol / 14.0067g) = 0.104moles

Moles Ca:

6.27g * (1mol / 40.078g) = 0.156moles

The ratio between Moles N and moles of Ca is:

0.156moles / 0.104 moles = 1.5

That means there are 1.5 moles of Ca per mole of N. As empirical formula must be given in whole numbers:

There are 3 moles of Ca per 2 moles of N.

Empirical formula is:

             Where is the picture?                                                                         

Answer:

347.6995462

Phosphorus heptasulfide, free from yellow and white phosphorus appears as light-yellow crystals, light-gray powder, or fused solid. Melting point 310°C.

...

Copper is mostly utilized in generators, house and auto wiring, as well as the cables in gadgets like radios, TVs, computers, lighting, and motors due to its flexibility and good conductivity.

The expenses of legacy health care and company pensions were also fixed. Therefore, many costs remained largely same as revenues declined. This resulted in losses. Due to the mounting losses and the weakening economy, GM was no longer able to operate as a profitable company.

Who is the GM Company's owner? Stockholders, 12.56% General Motors Co. insiders, plus 7.47% retail investors collectively own 79.97% of General Motors Co. (NYSE: GM). The largest individual Ford Motor Co. fund is Retired person Medical Benefits Trust UAW.

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Answer: The heat flows into Earth's atmosphere which changes as the Sun rises and sets, which increases during the day.

Explanation:

The concentration of H₂O, given that the solution has a OH⁻ concentration of 8×10⁻¹² M is 8×10⁻¹² M

First, we shall write the dissociation equation. This is given below

H₂O(aq) <=> H⁺(aq) + OH⁻(aq)

Now, we shall obtain the concentration of H₂O. Details below:

From the above dissociation equation,

1 mole of OH⁻ is present in 1 mole of H₂O

Therefore,

8×10⁻¹² M OH⁻ will also be present 8×10⁻¹² M H₂O

Thus, we can conclude that the concentration of H₂O in the solution is 8×10⁻¹² M

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The position in extremity from most to least is water, ethanol, ethyl acetic acid derivation, CH3)2CO, 2-butanone, diethyl ether, hexane, and benzene.

From these solvents, ethanol will be totally miscible in water because of its more modest carbon fasten and it's capacity to frame hydrogen bonds.

Water is a polar dissolvable; other polar solvents incorporate CH3)2CO, acetonitrile, dimethylformamide (DMF), dimethylsulfoxide (DMSO), isopropanol, and methanol.

One way you could really work out a dissolvable's extremity is by utilizing its dielectric consistency, which is utilized to quantify how well the dissolvable can part of the way drop the field strength of the electric field of a molecule added to it. The higher the worth of a dissolvable's dielectric consistent, the more polar it will be.

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Answer:

CURVE is the answer

Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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The identity of the gas is C. O2 (oxygen). At standard temperature and pressure(STP), which is defined as 0 degrees Celsius (273.15 Kelvin) and 1 atmosphere (101.325 kilopascals), the volume occupied by one mole of any gas is 22.4 liters.

In this case, we have a 32 gram sample of gas that occupies 22.4 liters at STP. To determine the identity of the gas, we need to calculate the number of moles present in the sample.

To do this, we use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Since we know the volume (22.4 L) and STP conditions, we can rearrange the equation to solve for the number of moles: n = PV/RT. Plugging in the values for P, V, R, and T, we get: n = (1 atm)(22.4 L) / (0.0821 L·atm/(mol·K))(273.15 K).

Evaluating this expression gives us approximately 1 mole. Therefore, the 32 gram sample of gas is equivalent to 1 mole. The molar mass of oxygen (O2) is approximately 32 grams/mol, which matches the given mass. Hence, the identity of the gas is O2 (oxygen).

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The chemical reaction between C2H4 (ethylene) and O2 (oxygen) is a combustion reaction.

This means that the reactants (ethylene and oxygen) react with each other to produce carbon dioxide (CO2) and water (H2O), along with the release of energy in the form of heat and light. The balanced equation for this reaction is:

C2H4 + 3O2 → 2CO2 + 2H2O

This equation shows that two molecules of ethylene react with three molecules of oxygen to produce two molecules of carbon dioxide and two molecules of water. It is important to balance the equation so that there are equal numbers of atoms on both sides of the equation.

Overall, this reaction is an important process in industries such as fuel production and combustion engines, as it is a primary way of producing energy from hydrocarbons like ethylene.

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Answer:

your answer is 12 hope it's correct answer

Answer: Does adding salt to water make the water boil faster that if salt is not added?

Explanation:

The scientific question for the boiling water experiment could be: "What is the effect of increasing temperature on the boiling point of water?"

This question aims to investigate how temperature influences the boiling point of water. By conducting the experiment and analyzing the results, scientists can gain a better understanding of the relationship between temperature and the physical state change of water from liquid to vapor.

The question focuses on a specific variable (temperature) and its impact on the boiling process, allowing for a targeted investigation and potential insights into the behavior of water under different conditions.

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The percent by mass of chlorine in the hydrated form of the solid that has the formula COCL2·6H2O is 12.7%.

The percent by mass of chlorine in the hydrated form of the solid that has the formula COCL2·6H2O can be calculated using the following steps:

Determine the molar mass of the hydrated solid:

Molar mass of COCL2·6H2O = (12.01 + 16.00 + 35.45) + (6 x (1.01 + 2.02)) = 87.46 + 12.12 = 99.58 g/mol

Determine the molar mass of chlorine:

Molar mass of Cl = 35.45 g/mol

Calculate the number of moles of chlorine present in the hydrated solid:

Number of moles of Cl = (35.45 g/mol) / (99.58 g/mol) = 0.3575 mol

Calculate the mass of chlorine present in the hydrated solid:

Mass of Cl = 0.3575 mol x 35.45 g/mol = 12.69 g

Calculate the percent by mass of chlorine in the hydrated solid:

Percent by mass of Cl = (12.69 g / 99.58 g) x 100% = 12.7%.

So the percent by mass of chlorine in the hydrated form of the solid that has the formula COCL2·6H2O is 12.7%.

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1. The water inside a plant will not be able to come out.

2. It would kill the plants and species on Earth.

3. There would be no lakes, ocean, or water on land.

Answer:The mass of aluminum sulfate required to produce 455 mL of 0.310 mol/L of aluminum ions is approximately 94.7 grams.

Explanation: To determine the mass of aluminum sulfate that is required to produce 455 mL of 0.310 mol/L of aluminum ions, you will need to first calculate the number of moles of aluminum ions that are required. You can use the following steps:

Convert the volume of the solution to liters. Since there are 1000 mL in 1 L, the volume in liters is:

volume (L) = 455 mL / 1000 mL/L = 0.455 L

Calculate the number of moles of aluminum ions. Using the concentration of the solution in mol/L, the number of moles of aluminum ions is:

moles (mol) = concentration (mol/L) x volume (L)

= 0.310 mol/L x 0.455 L = 0.139 mol

Calculate the mass of aluminum sulfate required to produce this many moles of aluminum ions. Aluminum sulfate contains two aluminum ions per molecule, so the number of moles of aluminum sulfate required is twice the number of moles of aluminum ions. The mass of aluminum sulfate required can then be calculated using the molar mass of aluminum sulfate:

mass (g) = moles (mol) x molar mass (g/mol)

= (0.139 mol x 342.1 g/mol) / 2

= 94.7 g

Therefore, the mass of aluminum sulfate required to produce 455 mL of 0.310 mol/L of aluminum ions is approximately 94.7 grams.

Keep in mind that this is the mass of aluminum sulfate required to produce the desired concentration of aluminum ions in the solution, and that the actual mass of the solution may be larger due to the presence of water or other dissolved substances.

We know that 1 mole of sodium contains Avogadro number of atoms. - But we have to find the number of atoms in 0.2 mole of sodium. - Therefore 0.2 moles of sodium (Na) contains 12.046×1023atoms in it.

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The word equation for above chemical equation is :

Sulphur + Oxygen \(\rightarrow\) Sulphur dioxide

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The gas which is released from vehicles, forms acid rain and is foul smelling is Nitrogen Dioxide (NO₂).

Nitrogen Dioxide is one of the many oxides of Nitrogen that exist on the planet. It is part of a class of pollutants, which are mainly released at power plants or automobiles when fuels are burnt at high temperatures of up to 1200°F.

Many times, compounds of Nitrogen are present as impurities in various chemical compounds. When such compounds are used up in chemical reactions or are burnt for energy, these noxious gases are released into the atmosphere and interact with living organisms.

Even though compounds of Nitrogen are released naturally and absorbed by the nitrogen cycle, it has been unilaterally disturbed by human processes, causing all sorts of issues.

Since the electronic transitions of NO₂ involve visible light of longer wavelengths, especially red, we see its characteristic reddish-brown color. As for the foul smell, its ability to continuously react with the chemicals in its surroundings releases chemicals with specific odors.

One such reaction causes the formation of nitric acid (HNO₃), which combined with rain on lower altitudes, falls on earth as acid rain, causing a variety of damages to structures, as well as human lives.

NO₂ causes all these and more.

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One example of a mineral that serves as a cofactor in chemical reactions is zinc. Zinc is a cofactor for a variety of enzymes involved in cellular metabolism, including enzymes involved in DNA synthesis and repair, protein synthesis, and cell division.

Zinc is also important for maintaining proper immune function and wound healing. Some examples of enzymes that require zinc as a cofactor include carbonic anhydrase, which is involved in the regulation of acid-base balance in the body, and alcohol dehydrogenase, which is involved in the metabolism of alcohol. Zinc is found in a variety of foods, including meat, seafood, nuts, and seeds, and is also available as a dietary supplement.

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Lead cannot melt at such level, hence it cannot break down into individual atoms or molecules. A change in the bonding of atoms or molecules is referred to as melting.

The metallic connections are broken and the atoms are made more mobile by the energy needed to melt the metal. Atoms have the same kinetic energy as they did as a solid at a particular temperature, such as the melting point.

No, an atom cannot be melted. The three common states of matter no longer hold true when you are dealing with so tiny a piece. Atoms do not alter until by nuclear fission or fusion.

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Answer:

B

Explanation:

building blocks for creating proteins

Answer:

10 moles of O2

Explanation:

Balanced Equation:

CH4 + 2O2=CO2+2H2O

Now,

According to Stoichiometry,

In the reaction,

           1 mole CO2 is produced by 2 moles of O2

∴5 moles of CO2 is produced by (2 X 5) moles of O2

                                                       = 10 moles of O2

Therefore, to produce 5 moles of CO2, 10 moles of Oxygen is needed.