A container with a volume of 893L contains how may moles of air at STP?

Answer:

Explanation:

When looking at a chemical reaction, the substance present before the reaction takes place are called the (5)

REACTANT

and the substance produced after the reaction are the (6).

PRODUCT

know through the Law of Conservation of (7)

MATTER

that nothing is created or destroyed. This is reflected in a (8

BALANCED

chemical equation, where the NUMBER OF  atoms of each element on each side of the arrow is (9)-

equal

or the same.

REMEMBER: WHEN BALANCING EQUATIONS YOU CANNOT CHANGE THE SUBSCRIPTS OF THE COMPOUNDS, YOU CAN ONLY SHOW BY THE COEFFICIENTS HOW MANY MOLECULES YOU HAVE!

Answer:

c

Explanation:

because the sun is at the center of the universe the planet orbit the sun its basically a simple answer so if you need more help im right here

The sun and the planets are part of the solar system. The sun is in the center of the system, and the planets revolve around it. Thus, option C is correct.

A solar system is a part of the Milky Way galaxy that includes the planets, stars, sun, moon, asteroids, etc. The Sun is the star that is fixed at the center of the system.

The planets are not fixed and revolve in orbit around the sun and rotate on their axis. The sun and planets are made up of gases and have different atmospheres.

Therefore, option C. sun is at the center around which the planets revolve.

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Answer: a mercury thermometer is better to measure very small changes in temperature

Explanation:

i took the test and got it right

Answer:

the answer is C, a mercury thermometer is better to measure very small changes in temperature.

Explanation:

i just took the test and it was correct :)

Answer:

B

Explanation:

The specimen at 100x zoom can be identified as an Animal cell as per the observations of it containing the cytoplasmic elements like the cytosol.

Organelles, cytoplasmic elements, the cytosol, and the cell membrane make up the normal structure of an animal cell.

Each of the cell's organelles is a membrane-bound structure with a specific function. Animal cells are the kind of typical eukaryotic cells because they have the presence of a membrane-bound nucleus and organelles and are encased in a plasma membrane.

Animal cells lack a cell wall, in contrast to eukaryotic cells found in plants and fungus. The building blocks of all living things in the kingdom Animalia are called animal cells.

They give bodies shape, take in nutrients to turn into energy, and aid in animal movement. They are also capable of self-replication and contain all an organism's genetic material.

The biggest organelle in animal cells is the nucleus. Cell activity is controlled by the nucleus. It also includes the chromosomes of the cell.

The genetic material (DNA) that makes you who you are is contained in the chromosomes.

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Nanomaterials, whether natural, engineered, organic, or inorganic, offer various applications across industries. However, their environmental health and safety impacts need to be carefully evaluated and managed to mitigate any potential risks.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

Natural Nanomaterials:

Examples: Carbon nanotubes (CNTs) derived from natural sources like bamboo or cotton, silver nanoparticles in natural colloids, clay minerals (e.g., montmorillonite), iron oxide nanoparticles found in magnetite.

Uses: Natural nanomaterials have various applications in medicine, electronics, water treatment, energy storage, and environmental remediation.

Environmental health and safety impacts: The environmental impacts of natural nanomaterials can vary depending on their specific properties and applications. Concerns may arise regarding their potential toxicity, persistence in the environment, and possible accumulation in organisms. Proper disposal and regulation of their use are essential to minimize any adverse effects.

Engineered Nanomaterials:

Examples: Gold nanoparticles, quantum dots, titanium dioxide nanoparticles, carbon nanomaterials (e.g., graphene), silica nanoparticles.

Uses: Engineered nanomaterials have widespread applications in electronics, cosmetics, catalysis, energy storage, drug delivery systems, and sensors.

Environmental health and safety impacts: Engineered nanomaterials may pose potential risks to human health and the environment. Their small size and unique properties can lead to increased toxicity, bioaccumulation, and potential ecological disruptions. Safe handling, proper waste management, and risk assessment are necessary to mitigate any adverse effects.

Organic Nanomaterials:

Examples: Nanocellulose, dendrimers, liposomes, organic nanoparticles (e.g., polymeric nanoparticles), nanotubes made of organic polymers.

Uses: Organic nanomaterials find applications in drug delivery, tissue engineering, electronics, flexible displays, sensors, and optoelectronics.

Environmental health and safety impacts: The environmental impact of organic nanomaterials is still under investigation. Depending on their composition and properties, they may exhibit varying levels of biocompatibility and potential toxicity. Assessments of their environmental fate, exposure routes, and potential hazards are crucial for ensuring their safe use and minimizing any adverse effects.

Inorganic Nanomaterials:

Examples: Quantum dots (e.g., cadmium selenide), metal oxide nanoparticles (e.g., titanium dioxide), silver nanoparticles, magnetic nanoparticles (e.g., iron oxide), nanoscale zeolites.

Uses: Inorganic nanomaterials are utilized in electronics, catalysis, solar cells, water treatment, imaging, and antimicrobial applications.

Environmental health and safety impacts: Inorganic nanomaterials may have environmental impacts related to their potential toxicity, persistence, and release into ecosystems. Their interactions with living organisms and ecosystems require careful assessment to ensure their safe use and minimize any negative effects.

Understanding their properties, fate, and behavior in different environments is crucial for responsible development, use, and disposal of nanomaterials.

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When comparing single, double, and triple bonds formed between two carbon atoms, the shortest bond would be the triple bond. This is because it has three electron pairs shared between the carbon atoms, pulling them closer together. The strongest bond would also be the triple bond, as it has the most electron pairs involved in the bond, resulting in a stronger bond strength.

When comparing single, double, and triple bonds formed between two carbon atoms, the triple bond would be the shortest and the strongest. This is because a triple bond involves three shared pairs of electrons between the two carbon atoms, whereas a double bond involves only two shared pairs of electrons and a single bond involves only one shared pair of electrons. The greater the number of shared pairs of electrons, the stronger the bond and the shorter the distance between the two carbon atoms.

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Answer:

C. Tungsten

Explanation:

Earth metals are magnesium and beryllium. The other three, which include rubidium, tungsten and cesium.

Please mark me as brainliest!

Answer: B (The Rf value would decrease)

Explanation:

The Rf (retention factor) value is a ratio of the distance traveled by the compound to the distance traveled by the solvent front in thin-layer chromatography (TLC). The polarity of the solvent affects the Rf value of a compound.

In general, if a more polar solvent is used in TLC, the Rf value of a compound will decrease, and if a less polar solvent is used, the Rf value will increase.

In this case, using 40% ethyl acetate in hexanes means using a more polar solvent compared to a pure hexanes solvent. As eugenol is a moderately polar compound, the increased polarity of the solvent will likely result in a decrease in the Rf value.

Therefore, the correct answer is b. The Rf value would decrease.

Answer:

Being young, kittens can also be called “cubs” although the name “kitten” is more commonly used. Most consider cats as kittens if they are still less than one year of age. However, some vets say that a kitten can already be considered a cat when it reaches eight or nine months.

Or could also use:

Specie and stripes

1. A cat and it’s litter can’t be related without the producer which in this case is the mother

2. The stripes shows that the two are related and yeah you can have to cats that have the same stripes but that’s not likely, every-time any two cats with stripes are put together the cats show similarities but that doesn’t tell us that their related. Every cat has similar stripes but there is something that’s always gonna be off with the stripes whether the stripes have the same color or the stripes have the same arrangement on the cat. Like people cats have similar traits but that doesn’t mean there related (ex: two blue eyed people, that’s doesn’t prove that their related in any type of way).

Explanation:

Answer:

Inherited characteristics that show that a cat and kitten are related include physical traits such as fur pattern and color, eye shape, and body type. Another example is behavioral traits such as playfulness and social behavior. These traits are passed down from parent to offspring through genes and provide evidence of a familial relationship.

Explanation:

The gauge pressure of the oxygen in the tank in atmospheres is 11.46 atm.

The gauge pressure is given as the pressure relative to the ambient atmospheric pressure. The gauge pressure can be calculated as:

Gauge pressure = System pressure - Atmospheric pressure

The system pressure of the 35-liter tank with 18.3 moles oxygen is given as:

Pressure = moles * Rydberg constant * Temperature / Volume

Pressure = 18.3 moles * 0.08 L.atm.mol⁻¹.K⁻¹ * 298 K / 35 L

Pressure = 12.46 atm

The standard pressure is given as 1 atm.

Thus, the gauge pressure of the oxygen in the tank can be:

Gauge pressure = System pressure - Atmospheric pressure

Gauge pressure = 12.46 atm - 1 atm

Gauge pressure = 11.46 atm

The gauge pressure of the oxygen in the tank in atmospheres is 11.46 atm.

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Answer:

The answer is 8.31 atm.

Explanation:

Ideal Gas Law = PV = nRT
(where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.)

First, convert the temperature from Celsius to Kelvin:

25°C + 273.15 = 298.15 K

Next, plug in the known values into the Ideal Gas Law equation:

P * 35.0 L = 18.3 moles * 8.31 J/mol*K * 298.15 K

Finally, solve for P:

P = (18.3 moles * 8.31 J/mol*K * 298.15 K) / 35.0 L

The pressure is in units of joules per liter. To convert it to atmospheres, divide by the atmospheric pressure in joules per liter:

1 atm = 101,325 Pa = 101,325 J/m^3 = 101.325 kPa

P (in atm) = (18.3 moles * 8.31 J/mol*K * 298.15 K) / (35.0 L * 101.325 kPa)

= 8.31 atm

Answer:0

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

Answer:

no I don't listen to them

Answer:

I love his style of Nu Metal and the influence that metal has on his music ultimately. I feel like Zilla fans don't give SosMula enough props tho, he def puts the icing on the cake in every song

Explanation:

Answer:

Light is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes. The visible spectrum showing the wavelengths of each of the component colours. The spectrum ranges from dark red at 700 nm to violet at 400 nm.The 'colour' of an object is the wavelengths of light that it reflects. This is determined by the arrangement of electrons in the atoms of that substance that will absorb and re-emit photons of particular energies according to complicated quantum laws.The reason that different waves of light appear to be different colors of light is because the color of a light wave depends on its wavelength. For example, the wavelength of blue light is about 450 nanometers, while the wavelength of red light is about 700 nanometers.

Explanation:

One common test for carbon dioxide (CO2) is the limewater test. Here's how it works:

Add a small amount of limewater (a solution of calcium hydroxide in water) to a clear container.

Blow into the container, creating bubbles in the limewater.

Observe the limewater. If carbon dioxide is present, it will react with the calcium hydroxide to form calcium carbonate, which will make the limewater turn cloudy or milky.

This test is often used to detect the presence of carbon dioxide in the breath of a person, as well as in various chemical reactions where carbon dioxide may be produced or consumed.

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Answer:

b north to south

Explanation:

"All of the above" (option a) is clear evidence that the additional carbon dioxide in the air over the industrial era is from fossil fuel origin.

This is because carbon dioxide is one of the main greenhouse gases released during the combustion of fossil fuels. All of these factors serve as clear evidence that the additional carbon dioxide in the air over the industrial era is from fossil fuel origin.

The term "fossil fuel" refers to natural resources such as coal, oil, and natural gas that have been formed from the remains of ancient plants and animals. When these fuels are burned, carbon dioxide is released into the atmosphere.

Methane, on the other hand, is another greenhouse gas that is also released during the extraction and use of fossil fuels. Coincident changes in methane levels can indicate a connection between the burning of fossil fuels and the increase in carbon dioxide in the air.

Therefore, all of these factors serve as clear evidence that the additional carbon dioxide in the air over the industrial era is from fossil fuel origin.

Thus option a is correct.

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The volume in units of cm3 of a body-centered cubic unit cell for an element with an atomic radius of 195 pm is 1.04 × 10^-23 cm^3 (approx.)

To calculate the volume of a body-centered cubic unit cell, we need to know the length of one side of the cube, which is equal to the distance between two atoms in the cell. For a body-centered cubic unit cell, this distance is equal to the diagonal of the cube, which can be found using the Pythagorean theorem.

First, we need to convert the atomic radius of the element from picometers to centimeters:
195 pm = 1.95 × 10^-8 cm

Next, we can use the formula for the diagonal of a cube to find the length of one side of the cube
diagonal = √3 × length
where √3 is the square root of 3.

We know that the diagonal is equal to twice the atomic radius (since it passes through the center of the cube and intersects two atoms), so we can rearrange the formula to solve for the length:
length = diagonal / √3 = 2 × atomic radius / √3
Plugging in the values, we get:
length = 2 × 1.95 × 10^-8 cm / √3 ≈ 2.24 × 10^-8 cm

Finally, we can calculate the volume of the cube:
volume = length^3 = (2.24 × 10^-8 cm)^3 ≈ 1.04 × 10^-23 cm^3

Therefore, the volume of a body-centered cubic unit cell for an element with an atomic radius of 195 pm is approximately 1.04 × 10^-23 cm^3.

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Answer:

I believe the answer you're looking for is DNA, not sure though

Answer:

I'm not sure if this is true but in science class I learned that stress can cause a risk of diseases

Explanation:

the more months of stress you have, the higher the risk

The correct formula of the molecule is C4H9O2.

The model of a compound is a representation of the molecule. It gives us an idea of what the molecule looks like as well as its molecular formula.

Looking at the structure of the compound as shown in the model in the question, the correct formula of the molecule is C4H9O2.

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Answer:C4H9O2.

Explanation:

The concentration of CO (g) in the equilibrium mixture is 0.020 M. In other words, only a small amount of CO (g) is produced in this reaction at 1000°C. T 0.020 M.

The concentration of CO in an equilibrium mixture (in mol/L) is 5.8 M.

Given that the concentration of H2O (g) is [H2O] = 0.500 M at 1000°C, and  the reaction is:

C(s) + H2O(g) ⇄ CO(g) + H2(g) KC = 0.2 at 1000°C

We need to determine the concentration of CO in an equilibrium mixture (in mol/L)

if a reaction mixture initially contains only reactants.

We can solve this problem using the ICE table method as follows:

Let x be the change in concentration of H2O (g) and CO (g) when they reach equilibrium.

Then the equilibrium concentrations of CO (g) and H2 (g) are equal to x. Hence, the equilibrium concentration of H2O (g) is (0.500 - x) M. Substitute these values in the expression for Kc and solve for x.

Kc = [CO (g)] [H2 (g)] / [H2O (g)] [C (s)]

= 0.2[CO (g)] = Kc [H2O (g)] [C (s)] / [H2 (g)]

= 0.2 × (0.500 - x) / x

We can simplify this expression by cross-multiplication to get:

5x = 0.1 - 0.2xx = 0.02 M

Substituting x = 0.02 M in the expression for [CO (g)], we get:

[CO (g)] = 0.2 × (0.500 - 0.02) / 0.02 = 5.8 M (approx.)

Therefore, the concentration of CO (g) in an equilibrium mixture (in mol/L) is 5.8 M.                                                                                               The problem requires us to find the equilibrium concentration of CO (g) in a mixture that initially contains only reactants.

To solve this problem, we need to use the expression for the equilibrium constant Kc, which is given by:

Kc = [CO (g)] [H2 (g)] / [H2O (g)] [C (s)]

We can also use the ICE table method to solve this problem. In this method, we start with the initial concentration of the reactants and calculate the change in concentration of each species as they reach equilibrium.

We then use the equilibrium concentrations to calculate the value of Kc and solve for the unknowns. Here is how we can set up the ICE table for this problem: Reaction:

C(s) + H2O(g) ⇄ CO(g) + H2(g)

Initial: [C] = [H2]

= 0 M,

[H2O] = 0.500 M

Equilibrium: [C] = [H2] = x,

[H2O] = 0.500 - x,

[CO] = [H2] = x

Change: +x +x -x -x

Substituting the equilibrium concentrations into the expression for Kc, we get:

Kc = [CO] [H2] / [H2O] [C]

= x² / (0.500 - x)

= 0.2

Solving for x, we get: x = 0.020 M

Substituting this value of x into the expression for [CO], we get:

[CO] = x = 0.020 M

Therefore, the concentration of CO (g) in the equilibrium mixture is 0.020 M.

In other words, only a small amount of CO (g) is produced in this reaction at 1000°C. T 0.020 M.

The concentration of CO in an equilibrium mixture (in mol/L) is 5.8 M.

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As the frequency of the radiation increases further, into the visible light spectrum, it can cause electronic transitions in atoms and molecules, leading to the emission of light and other optical effects.

Electromagnetic radiation is a form of energy that travels through space in the form of waves, without the need for a medium to propagate. It is characterized by oscillating electric and magnetic fields that are perpendicular to each other and the direction of propagation.

At low frequencies, such as radio waves and microwaves, the radiation typically only causes heating of the matter, as it transfers energy to the molecules in the material.

At higher frequencies, such as infrared radiation, the radiation can cause vibrations in the atoms and molecules of matter, leading to heating and thermal effects.

Thus, When matter absorbs electromagnetic radiation, the effects that it has on the matter depend on the frequency of the radiation.

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Answer:

masses are constant in chemical reactions

Explanation:

 I assume you are asking why you might get more mass out of a reaction between a metal and an acid with respect to the mass of the metal you put in.......

Metals tend to form salts in acids.......

When  metals form metal oxides, the oxide layer causes the extra mass. When acids reacts with metals, they form their metallic salts.

Metals are electropositive elements. In periodic table, the s block elements and d- block elements are metals. They are electron rich and easily loss one or more electrons from their valance shell.

Metals reacts with nonmetals such as oxygen, nitrogen, carbon etc. by donating electrons to them. Electronegative elements such as oxygen easily reacts with metals forming metal oxides.

Acids reacts with metals with donating the hydrogen ion or proton into the metal. That's why anionic acids are less mass than the acids with the protonated form.

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Normality is the number of equivalents of solute per liter of solution.

To find out how much HCl is in a 0.1 N solution, follow these steps:

1. Determine the molar mass of HCl: Hydrogen (H) has a molar mass of 1 g/mol, and Chlorine (Cl) has a molar mass of 35.5 g/mol.

Therefore, the molar mass of HCl is 1 + 35.5 = 36.5 g/mol.

2. Recall the definition of normality (N):

For an acid, the number of equivalents is equal to the number of moles of H+ ions that can be donated by one mole of the acid.

Since HCl is a monoprotic acid (donates only one H+ ion per molecule), its normality is equal to its molarity.

3. Calculate the molarity of the 0.1 N HCl solution: In this case, the molarity (M) is also 0.1 M, since HCl is monoprotic.

4. Use the formula to find the mass of HCl in the solution:

Mass = Molarity × Volume × Molar Mass.

Assuming you want to find the mass of HCl in 1 liter (1000 mL) of solution, the calculation would be: Mass = 0.1 M × 1 L × 36.5 g/mol = 3.65 g.

In a 0.1 N HCl solution, there are 3.65 grams of HCl per liter of solution.

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By the use of proportion, it would last him for 6.67 days.

From the question, we already had the information that the evil Barty Crouch Jr. had to drink at least 4 fl. oz. of Polyjuice Potion every hour in order to maintain his disguise as Mad Dog Moody.

Now;

If 128 fl. oz. = 1 gallon

   x  = 5 gallons

x = 640 fl. oz

If he takes  4 fl. oz. in 1 hour

He would take640 fl. oz  in x hours

x =  640 fl. oz * 1 hour/4 fl. oz

x = 160 hours

1 day is made up of 24 hours

x days is made up of 160 hours

x = 6.67 days

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The two ways in which humans have negatively affected groundwater are Fertilizers and pesticides.

Fertilizers were chemical substances that are applied to crops in order to boost their yield.

Pesticides are chemicals that are being used to keep pests at bay. Herbicides, insecticides, nematicides, and molluscicides are examples.

Fertilizers and pesticides applied to the land, manure from livestock as well as other animals, landfills, mining operations, even unintended releases such as chemical spills or storage tank leaks are all factors that affect groundwater quality.

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The amount of MnCl2 that will form is 8.05 g. The percent yield is 8.18% based on an actual yield of 5.25 g and a theoretical yield of 64.10 g.

To determine the amount of manganese chloride that will form, we need to first identify the limiting reagent. We can do this by comparing the number of moles of each reactant and seeing which one is present in the lower amount.

From the balanced chemical equation, we can see that 2 moles of KMnO4 react with 16 moles of HCl to produce 2 moles of MnCl2. So we need to convert the mass of each reactant to moles:

moles of KMnO4 = 25.40 g / 158.034 g/mol = 0.1605 mol

moles of HCl = 18.62 g / 36.46 g/mol = 0.511 mol

Since the stoichiometric ratio is 2 moles of KMnO4 to 16 moles of HCl, we can see that HCl is the limiting reagent because we only have 0.511 mol of it, which is less than half of what we need.

Now, we can use the stoichiometry of the balanced chemical equation to determine the number of moles of MnCl2 that will form:

moles of MnCl2 = 2/16 x 0.511 mol = 0.0639 mol

To convert this to mass, we can use the molar mass of MnCl2:

mass of MnCl2 = 0.0639 mol x 125.844 g/mol = 8.05 g

So, 8.05 g of MnCl2 will form in this reaction.

To calculate the percent yield, we can use the formula:

percent yield = actual yield / theoretical yield x 100%

If we have an actual yield of 5.25 g, we can calculate the theoretical yield by using the amount of limiting reagent (HCl) that was used:

moles of HCl used = 18.62 g / 36.46 g/mol = 0.511 mol

From the balanced chemical equation, we know that 2 moles of KMnO4 react with 2 moles of MnCl2, so the theoretical yield of MnCl2 can be calculated as:

moles of MnCl2 = 2/2 x 0.511 mol = 0.511 mol

mass of MnCl2 = 0.511 mol x 125.844 g/mol = 64.10 g

Now we can calculate the percent yield:

percent yield = 5.25 g / 64.10 g x 100% = 8.18%

Therefore, the percent yield is 8.18%.

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