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This problem is pointing out acetylene gas undergoes combustion, so it asks for the equation, limiting reactant, excess, moles of target product and how much of the excess reactant is left.

Summary of answers:

- [tex]2CH_2+3O_2\rightarrow 2CO_2+2H_2O[/tex]

- Limiting reactant: acetylene.

- Excess reactant: oxygen.

- moles of target product produced: 3.5 moles.

- moles of excess reagent remaining: 0.25 moles.

In chemistry, when two substances react to produce specific products, one can use the law of conservation of mass to correctly write the chemical equation standing for the chemical change. Thus, for acetylene, when it undergoes combustion, we would have:

[tex]2CH_2+3O_2\rightarrow 2CO_2+2H_2O[/tex]

In such a way, one can identify the limiting and excess reactants and the moles of target product, carbon dioxide whose molar mass is 44 g/mole, with the following calculations based on the mole ratios derived from the chemical equation:

[tex]3.5molCH_2*\frac{2molCO_2}{2molCH_2}=3.5molCO_2\\ \\5.5molO_2*\frac{2molCO_2}{3molO_2}=3.7molCO_2[/tex]

In such a way, we conclude that acetylene is the limiting reactant because it produces the lowest moles of CO2 and thus, oxygen is in excess. Moreover, the produced moles of the target product are 3.5 mol.

Finally, we can calculate the consumed oxygen with the following mole ratio and the leftover of oxygen (excess):

[tex]3.5molCH_2*\frac{3molO_2}{2molCH_2} =5.25molO_2[/tex]

[tex]mol _{O_2}^{left}=5.5mol-5.25mol=0.25mol[/tex]

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Answer:

aerobic (which needs oxygen) and anaerobic (which doesn't need oxygen). Aerobic respiration is a fixed metabolic reaction that takes place in the presence of oxygen, going on in a cell to transform chemical energy into ATPs. Anaerobic respiration is a process of cellular respiration in which the excessive energy electron acceptor is neither oxygen nor pyruvate derivatives

hope this will help you ✨

2moles of H₂SO₄ are needed to react with 4 moles of NaOH.

The number of moles present in a compound is the total number of atoms, ions or molecules present in that compound.

Number of moles of any substance

= mass of that substance/molar mass of the substance

1 mole of any substance contains 6.022 × 10²³ number of atoms, ions or molecules. 6.022 × 10²³ is also known as avogadro's number.

The mole ratio of NaOH:H₂SO₄ is 2: 1

Which  means that  1mole of H₂SO₄ require 2 moles of NaOH.

Therefore 4 mole of NaOH will require:  4÷2=2 moles of  H₂SO₄

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Answer:  the resulting compound to be neutral, two bromine anions must combine with one magnesium cation to form magnesium bromide (MgBr2).

Explanation: Because the reaction between the two is

Bromine reacts with magnesium to form magnesium brom and

how is magnesium bromide formed? Magnesium bromide can be synthesized by reacting hydrobromic acid with magnesium oxide and crystallizing the product. It can also be made by reacting magnesium carbonate and hydrobromic acids, and collecting the solid left after evaporation.

The breakdown of NO3 in the day leads to more consumption of N2O5 in the day hence its concentration is greater at night than in the day.

The equilibrium constant is a number that shows how much reactants are converted to products in a reaction. It is often shown as capital letter K in English.

Given the situation described in the question, we know that the concentration of N205 will be higher at night, because the decomposition of NO3(g) in the daytime will result in an increase in the rate of consumption of N2O5(g) to reform NO3(g).

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Which of the following is correct?

Thus, Option C is correct!!~

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Study of the absorption and emission of light and other radiation by matter, as related to the dependence of these processes on the wavelength of the radiation.

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Answer:

353kg

Explanation:

2000 x 0.1765 = 353kg

for every 1 cubic metre of helium there is 0.1765 kg of it

the balloon is holding 2,000 cubic metres of the helium.

That means that there are 2000 times of 0.1765kg of helium in the balloon

so you times 0.1765kg by 2000

Answer:

You didn't give any options/statements, so I'm just going to give you context on what catalysts does. Catalysts decrease the activation energy needed, allowing more particles for successful reactions.

I know my colleague tried doing an experiment by using hydrogen peroxide as a catalyst and seeing how rates of reactions were affected. It ended up with a stain on our chemistry lab and him re-doing his entire lab.

Answer:

Precipitate

Explanation:

A precipitate is a solid formed from a chemical solution

PRECIPITATE

Solid substance being produced from the chemical reaction between the two clear solution is termed as precipitate and the phenomenon is knowns as precipitation.

Precipation is an important part of chemistry practical in identifying the compounds, anions, cations and radicals.

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Answer:

6.47g

Explanation:

Hope this helps!

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

glucose = C₆H₁₂O₆

glucose produced = 1/6 x 23.6 = 3.93 moles

Answer:

c. Electrons are shared, but they aren't shared evenly

Explanation:

Pure (non polar) bonds have a low electronegativity difference of 0.0 - 0.4 which allows electrons to be shared.

Polar bonds have a high electronegativity difference of 2.0 4.0 so rather than sharing the electrons, the electrons will be transferred to one atom only and will stay there.

Covalent bonds have a electronegativity difference between these two types of bonds (0.4 - 2.0) so electrons are shared but not equally, meaning they are shared between the two atoms but stay at one atom for a longer period of time than the other.

Answer:

O₂(g), Br₂(l) Fe(s), He(g)

Explanation:

Those elements that occur naturally in nature are the right answers because it took nothing to make them

Delta. Hf = 0 means no heat was lost or gained

standard enthalpy of formation is defined as the change in enthalpy when one mole of a substance in the standard state is formed from its pure elements under the same conditions

O₂(g): Yes, it is a pure element in the standard state.

N(g): No, the pure element in the standard state is N₂(g).

H₂O(l): No, it is not a pure element but a compound.

Br₂(l): Yes, it is a pure element in the standard state.

Fe(s): Yes, it is a pure element in the standard state.

He(g): Yes, it is a pure element in the standard state.

S₆(s): No, the pure element in the standard state is S₈(s, rhombic).

socraticorg

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Answer:

volume of HCl remains the same

Reaction

Zn (s) + 2HCl (aq)  ⇒  ZnCl₂ (s) + H₂ (g)

A. gas H₂ collected: true

B. Every chemical reaction produces or absorbs heat. In chemistry, this effect is described as the enthalpy of a reaction.

This reaction releases heat (exothermic) and causes the temperature to increase: true

C. the volume of HCl will decrease because it reacts: false

D. the size of the zinc metal decreases as it reacts: true

Answer:

Sodium, Mercury, Argon, and Neon are used in the production of lamps. There are fewer safety guidelines regarding the handling of Neon and Argon than there are for Mercury and Sodium. Which of the following best describes the elements within the group of the periodic table that contains Neon and Argon gas?

A) Solid at room temperature and mostly uncreative with strong acids.

B) Gaseous at room temperature and mostly unreactive with metals.

C ) Solid at room temperature and mildly reactive with strong acids.

D) Gaseous at room temperature and highly reactive with metals.

Explanation:

Answer: C.

I Hopes it helps

The best statement about the Neon and Argon gas is that they are gaseous at room temperature and mostly unreactive with metals.

The atoms which have complete octet in the outermost shell are known as stable atoms.

Neon and argon gases are the noble gases, as they have stable electronic configuration and shows non reactive nature with other elements. These are present in the gaseous state at room temperature.

Hence, option (B) is correct.

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Answer:

Solidifications of alloys occurs over a range of temperatures whereas solidification of a pure metal will take place at a constant temperature

the answer to your question is

isotope

Answer:

true

Explanation:

sorry if wrong I hope it right

Answer:the answer is 0.0550L

Explanation:

Answer: 688 grams

Explanation:

Answer:

The new volume if the balloon is cooled at constant pressure is 3.98 L

Explanation:

The new volume is calculated using the Charles law formula

that is V1/ T1 = V2/T2 where,

V1 = 4.24 l

T1= 23c into kelvin = 23 +273 =296 K

T2 = 5.00 c into kelvin = 5.00 + 273 = 278 K

V2 = ?

by making V2 subject the subject of the formula by multiplying both side by T2

V2 = V1 xT2/ T1

V2 = (4.24 L x 278 K) / 296 k = 3.98 L

The internal energy of the system is 412 J.

From the first law of thermodynamics, energy can neither be created nor destroyed. Hence; U = q + w

U = internal energy

q = heat

w = work

Since work was done on the system q is positive. The system looses heat hence q is negative.

U = (-62J) +  474 J = 412 J

The internal energy of the system is 412 J.

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Answer:

All are reflective except for stone

i guess it is stone

Explanation:

Hope it helps!!!

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The mass of water (H₂O) needed to meet the oxygen demand is 191587.5 g

2H₂ + O₂ —> 2H₂O

Molar mass of O₂ = 16 × 2 = 32 g/mol

Mass of  O₂ from the balanced equation = 1 × 32 = 32 g

Molar mass of H₂O = (2×1) + 16 = 18 g/mol

Mass of H₂O from the balanced equation = 2 × 18 = 36 g

SUMMARY

From the balanced equation above,

32 g of O₂ reacted to produce 36 g of H₂O

From the balanced equation above,

32 g of O₂ reacted to produce 36 g of H₂O

170300 g of O₂ will react to produce = (170300 × 36) / 32 = 191587.5 g of H₂O

Thus, 191587.5 g of H₂O is needed to meet the oxygen demand

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moles of oxygen: 1/2 x moles of water

= 1/2 x 7.8 = 3.9

Answer:the correct answer is A.To open an artery near the heart

Explanation:I just took the test :)

A stent is used to open an artery near the heart and the correct option is option A.

A stent is commonly used in medical procedures to open up narrowed or blocked arteries near the heart. It is a small, mesh-like tube typically made of metal or synthetic materials. The stent is inserted into the affected artery and expands, effectively widening the artery and improving blood flow. This procedure is known as coronary angioplasty or stenting.

The narrowing or blockage of arteries can occur due to atherosclerosis, a condition in which plaque builds up on the artery walls. This can lead to reduced blood flow and potentially result in chest pain (angina) or even a heart attack. By placing a stent, the artery is opened up, allowing for improved blood flow to the heart muscle.

Thus, the ideal selection is option A.

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