What is the balanced chemical equation for the combustion of sulphur

Answer:

D. F-

Explanation:

Br - 185pm

Cl - 175pm

I - 198pm (I'm not sure what "I" is but I guess it is iodine)

F - 147pm

\(O_{2}\) - 152pm

=> The ion with the smallest radius is F - 147pm

Decreased because we all know what happen if we put it with thermal energy

When thermal energy is supplied to gas molecules in the container, the movement, kinetic energy, and pressure of the molecules will increase.

Gas molecules are in constant random motion. They collide frequently which other and the walls of the container.

When thermal energy is applied, the gases move faster (acquire higher velocity). The kinetic energy also increases accordingly.

As a result of the increase in thermal energy, gas molecules collide with the walls of the container more frequently (pressure increases).

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Answer:

H20 only

Explanation:

It's because that When a chemical forms, It turns into a product. The product can't just float away, but byproducts can.

Answer:

107.9

Explanation:

Answer:

Reflection

Explanation:

Answer:

b

Explanation:

Answer:

4 enzymes responsible for digestion:

1. Salivary amylase ---- substrate: Starch ---- end-product: Maltose  

2. Lipase  ---- substrate: Lipids (fats and oils) ---- end-product: Fatty acids and glycerol

3. Maltase ---- substrate: Maltose ---- end-product: Glucose

4. Protease ---- substrate: Protein ---- end-product: Amino acids

Answer:

4.86moles of barium sulfide are produced

Explanation:

To solve this question we need to convert the mass of barium sulfide (BaS) to moles using the molar mass of BaS:

Molar mass BaS:

1 Ba atom = 137.3g/mol

1 S atom = 32.1g/mol

Molar mass BaS = 137.3 + 32.1 = 169.4g/mol

Moles in 823g of BaS:

823g * (1mol / 169.4g) =

Answer:

Argon is a noble gas

Hope this helps

A net ionic equation describing the total reaction between sodium hydroxide and phosphoric acid (h3po4) in aqueous solutions.

H3PO4(aq) → Na3PO4(aq) + 3H2O(l)

To write the net ionic equation, we need to first write the balanced ionic equation, which shows all the ions in solution that participate in the reaction. The ionic equation for the reaction is:

3Na+(aq) + 3OH-(aq) + H3PO4(aq) → Na3PO4(aq) + 3H2O(l)

Next, we cancel out the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the reaction. In this case, the spectator ions are the sodium ions (Na+) and the hydroxide ions (OH-). The net ionic equation is then:

H3PO4(aq) → Na3PO4(aq) + 3H2O(l)

This equation shows the actual chemical change that occurs in the reaction, which is the transfer of a proton (H+) from the phosphoric acid to the hydroxide ion, forming water and the phosphate ion.

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Answer:

if my calculation are correct, it's 295 grams

Explanation:

because liters converted to grams is .1=100 so if you take 2.95 times 100, it equals 295

Answer:

Bismuth

Explanation:

Bismuth's atomic weight is 209.98 and an be mistaken for lead in its natural sense because it's 86% as dense as lead.

hope this helps! <3

Answer:Hi! I hope this will help you with your question, whether this is an assignment or not. The answer that I get is 0.033 concentration.

If 0.0025 mol NaNo3 forms during the reaction, the concentration of NaNO3 in the final solution should be 0.033.

Explanation:

The rate of the chemical reaction is 25 g/hr.

Reaction rate or reaction rate is the rate at which reactants are converted into products. When we talk about chemical reactions, the fact is that the rate at which they occur varies greatly. Some chemical reactions are almost instantaneous, while others usually take some time to reach a final equilibrium.

Factors affecting the speed of a reaction

Therefore,

The Rate of reaction refers to the rate at which reactants are used up or the rate at which products appear.

So, the formula for the rate of reaction is as follows:-

\(rate of reaction= \frac{mass\ of\ the\ reactant\ used up}{time taken}\)........(1)

Mass of reactant used up= 2g

Time taken = 5 minutes

Convert the time in minutes to hour as follows:-

t(hour) = \(5mint\times\frac{1 hour}{60 min}\)

           = 0.08 hour

Substitute the given values in equation (1) as follows:-

rate of reaction= \(\frac{2g}{0.08 hour}\) = 25g/hr.

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The volume of the balloon is 3.788l.

Boyle's law:

Boyle's law state that the volume of a gas at constant temperature varies inversely with the pressure exerted on it.

The formula of Boyle's law:

P1V1 = P2 V2

P1 = 1.334atm

V1 = 1.88l

P2 = 0.662 atm

Putting the values in the equation we have:

1.334 × 1.88 = 0.662 × V2

V2 = 2.51/ 0.662

    = 3.788 l

Therefore the volume is 3.788l

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The mass of the mixture is 95.8 g and the percentage by mass of cyclohexane in the mixture is 81.33%.

To calculate the percentage by mass of cyclohexane in the mixture, you need to use the formula:

Percentage by mass = (mass of component / total mass of mixture) × 100

Given that you have a mixture of cyclohexane and water and the density of the mixture is 0.958 g/mL,

1. To determine the mass of the mixture, you need to know the volume of the mixture and the density of the mixture. Since the density of the mixture is given, you can use the following formula to determine the mass of the mixture:

mass of mixture = density of mixture × volume of mixture

The mass of the mixture is: mass of mixture = 0.958 g/mL × 100 mL = 95.8 g

2. Since the density of cyclohexane is given as 0.779 g/mL, you can use the following formula to determine the mass of cyclohexane:

mass of cyclohexane = density of cyclohexane × volume of cyclohexane = 0.779 g/mL × 100 mL = 77.9 g

3. Using the formula given above, you can calculate the percentage by mass of cyclohexane in the mixture:

percentage by mass of cyclohexane = (mass of cyclohexane / mass of mixture) × 100

percentage by mass of cyclohexane = (77.9 g / 95.8 g) × 100 = 81.33%

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Answer:

the ability to breed successfully

Explanation:

Answer:

the ability to breed successfully

Explanation:

the more offspring's an organism has, the less chance of extinction would happen. I hope that helped bestie

HPO₄⁻ (aq) + Ca²⁺ (aq) → CaHPO₄(s)

In this reaction, the calcium ion (Ca⁺) from calcium chloride combines with the hydrogen phosphate ion (HPO₄²⁻) to form solid calcium hydrogen phosphate (CaHPO₄), which precipitates out of the solution.

The net ionic equation for the precipitation reaction that occurs when hydrogen phosphate ion (HPO₄²⁻) reacts with 1 M calcium chloride (CaCl₂) can be written as follows:

HPO₄⁻ (aq) + Ca²⁺ (aq) → CaHPO₄(s)

In this reaction, the calcium ion (Ca⁺) from calcium chloride combines with the hydrogen phosphate ion (HPO₄²⁻) to form solid calcium hydrogen phosphate (CaHPO₄), which precipitates out of the solution.

The equation provided is a simplified net ionic equation that only includes the species directly involved in the precipitation reaction. In an actual solution, there would be other ions present, but they are not directly participating in the precipitation reaction and are not included in the net ionic equation.

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About one-third of the toxic metal, mercury (hg), is released into the atmosphere from natural sources such as rocks, soil, volcanoes, and the ocean. the remaining two-thirds comes from human activities. option A is correct.

First, mercury is naturally emitted into the air from volcanoes, rock weathering, forest fires, and soil. Second, mercury is released into the air by burning fossil fuels and municipal or medical waste.

Mercury persists in the environment for long periods of time by cycling back and forth between air and soil, changing chemical forms in the process. The atmospheric lifetime of inorganic elemental mercury is estimated to be up to two years, while organic methylmercury can remain in soil for decades. Mercury is never removed from the environment; it just moves to other places and eventually gets buried under soil and sediments

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Answer:

Sorry it's kinda difficult! Maybe I can help you next time.

A variety of equipment created especially for this purpose by Balcon Engineering makes it simple to empty and dispose of vials, ampoules, and small bottles in a safe and cost-effective manner.

What are snap cap vials?

Snap Cap Vials are the best containers for storing live insects temporarily. These plastic snap cap vials include a white snap-tight cap to protect your specimens and are composed of sturdy polystyrene plastic. These vials made of clear plastic are useful for both lab and field work. The Ecology Supplies aspirator uses this vial. When using an aspirator to collect a lot of specimens or numerous distinct species, extra tubes come in handy. Although they are temporarily compatible with alcohol, they are not "sealable" and will leak if they are tilted. Ethyl acetate cannot be combined with them. We currently have 3 sizes available, ranging from 5 dram to 12 drams, but we will also provide other sizes upon request. 10 packs of vials are offered for sale.

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Answer:

1 grams NH3 is equal to 0.058718113128665 mole. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between grams NH3 and mole.

Explanation:

Answer:

C, physical change

Explanation:

take a look at the equation. Next to each form of water do you see the little (g) and (l)? These represent the state of matter the water is in. So, the water is going from a gas to a liquid. The chemical compound is the same so its a physical change, not chemical, and it is reversible. You could change the liquid water back to the gas through evaporation. Endothermic has literally nothing to do with this equation so you can easily eliminate that answer choice.

The reason that is important to use demineralized water is option r b) Because demineralized water doesn't contain minerals.

The simplest definition of demineralized water is simply water from which the metal, salt, and mineral ions have been removed.

Therefore, Water that has been distilled and water that has been demineralized are generated using different purification processes, and as a result, the results are different. Minerals have been taken out of demineralized water, leaving only H2O. Hence, option b is correct.

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Answer:

A reaction at equilibrium implies that the concentration/amount of reactants & products present in that reaction don't change but will remain constant. It could also mean that the forward reactions and reverse reactions will occur at the same rates.

Explanation:

A reaction at equilibrium implies that the concentration/amount of reactants & products present in that reaction don't change but will remain constant. It could also mean that the forward reactions and reverse reactions will occur at the same rates.

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer: C, 0

Explanation: just a mere guess

i)   The smallest energy is n=7 to n=6

ii)  The highest frequency is n=7 to n=1

iii) The shortest wavelength is n=7 to n=1

i) The energy of each level increases as the number of energy levels increases, and the energy difference between the levels narrows. so that n=7 to n=6 has the lowest energy.

ii)         E = hv    where, v = frequency

          E = hc/l   where, l = wavelength  

wavenumber = 1/wavelength = 109677(1/n1^2-1/n2^2) cm-1

    n1 = 1  , n2 = 6

  1/wavelength = 109677(1/1^2-1/6^2)

            1/l   = 1.07*10^5 cm-1

iii) c = vl

   v =frequency =  c/l

   c = 3*10^10 cm/s

   1/l = 1.07*10^5 cm-1

    v = (3*10^10)*(1.07*10^5)

       = 3.21*10^15 s-1

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During an experiment, spectrophotometer is calibrated after inserting the cuvette containing the analyte,to reduce errors in results.

Errors in chemical analysis result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in decrease in accuracy, reproducibility, and precision.

There are three types of errors:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings to reduce the error.

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