Can somebody plz just answer this 1 question thx!!!
If answered correct (MARK BRAINLIEST)
:D

The amount of heat produced when 125 g of acetylene C₂H₂ combust in air is –6255.3 KJ

C₂H₂ + 5/2O₂ —> 2CO₂ + H₂O ΔH = –1301.1 KJ/mol

From the balanced equation above,

1 mole of C₂H₂ releases –1301.1 KJ of heat energy

But

1 mole of C₂H₂ = (2×12) + (1×2) = 26 g

Thus,

26 g of C₂H₂ releases –1301.1 KJ of heat energy

From the balanced equation above,

26 g of C₂H₂ releases –1301.1 KJ of heat energy

Therefore,

125 g of C₂H₂ will release = (125 × –1301.1) / 26 = –6255.3 KJ of heat energy

Thus, –6255.3 KJ of heat energy were produced from the reaction.

Learn more enthalpy change:

https://brainly.com/question/11967318

Answer:

1. Mn

2. Se

3. Al

4. Na

5. Ca

6. IE

7. Mg

8. Sb

9. Sn

10. H

Explanation:

Answer:

1°C

Explanation:

We know that the heat required to raise the temperature is given by :

[tex]Q=mc\Delta T[/tex]

m is mass

c is specific heat

[tex]\Delta T[/tex] is the change in temperature

ATQ,

[tex]m_1c\Delta T_1=m_2c\Delta T_2\\\\m_1\Delta T_1=m_2\Delta T_2\\\\\dfrac{100}{1000}=\dfrac{\Delta T_2}{10^{\circ}}\\\\\Delta T_2=1^{\circ}C[/tex]

Hence, the required temperature is 1°C.

Zn(s) + Pb(NO₃)₂ (aq) → Zn(NO₃)₃ (aq) + Pb (s)

There are two types of chemical reactions that may occur.

single-replacement reactions and double-replacement reactions.

A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds

A + BC ⇒ AC + B

Not all of these reactions can occur. We can use the activity series, which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.

This series is better known as the Volta series, where the metal element with a more negative electrode potential is on the left, while the element with a more positive electrode potential on the right.

The more left the position of a metal in the series, the more reactive metal (easy to release electrons)

Generally, the Volta series used is

Li K Ba Sr Ca Na Mg Al Mn Zn Cr Fe Cd Co Ni Sn Pb H Sb Bi Cu Hg Ag Pt Au

Solid zinc and aqueous lead (II) nitrate react to from aqueous zinc (II) nitrate and solid lead.

Can be expressed in chemical equations :

Zinc + aqueous lead (II) nitrate ⇒aqueous zinc  nitrate + lead metal

Zn(s) + Pb(NO₃)₂ (aq) → Zn(NO₃)₃ (aq) + Pb (s)

Reactants : Zn and Pb(NO₃)₂

Products : Zn(NO₃)₃ and Pb

The existing Zinc element can replace the Lead element, which is on the right side of Zn,  so the reaction will occur.

Answer:

elastic potential energy

Explanation:

Elastic potential energy is the energy stored in elastic materials as the result of their stretching or compressing.

Answer:

its to far to be seen with a telescope and it would take over 10 billion light yrs to travel there

Explanation:

Answer:

C

Explanation:

The reaction between carbon dioxide and lithium hydroxide can be represented by the equation:

[tex]\displaystyle \text{CO$_2$} + 2\text{LiOH} \longrightarrow \text{Li$_2$CO$_3$}+ \text{H$_2$O}[/tex]

We want to determine the amount of moles of LiOH needed to react completely with 25.5 g of CO₂.

Determine the number of moles of CO₂ in 25.5 g of CO₂:

[tex]\displaystyle 25.5\text{ g CO$_2$} \cdot \frac{1\text{ mol CO$_2$}}{44.01\text{ g CO$_2$}} = 0.579\text{ mol CO$_2$}[/tex]

Use stoichiometry to determine the amount of LiOH necessary. CO₂ and LiOH are in a 1:2 ratio. That is, for every one mole of CO₂ that reacts, two moles of LiOH must also react.

[tex]\displaystyle 0.579\text{ mol CO$_2$} \cdot \frac{2\text{ mol LiOH}}{1\text{ mol CO$_2$}} = 1.16\text{ mol LiOH}[/tex]

In conclusion, our answer is C.

The number of moles the sample of sodium hydroxide (NaOH) will contain is 4 moles.

Moles of any substance will be calculated by using the below formula:
n = W/M, where

W = given mass

M = molar mass

Given mass of NaOH = 160 g

Given molar mass of NaOH = 40 g/mole

On putting these values on the above equation, we get

n = 160 / 40 = 4 moles

Hence, required moles is 4 moles.

To know more about moles, visit the below link:
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Answer:

A). 4.000

Explanation:

Poopy fart fart

Answer:

It's basically a positive charged atom.

Explanation:

Answer:

Option C

Explanation:

The reaction is given by

[tex]\\ \rm\rightarrowtail {Pb(NO_3)_2\atop Lead\:nitrate}+{KI\atop Potassium\:iodide}\longrightarrow {KNO_3\atop Potassium\:nitrate}+{PbI_2\atop Lead\:Iodide}[/tex]

This is a double Displacement reaction

Answer:

it responds to fire because the fire is something called the stimulus which forces the wax on the candle to melt.

Answer:

sorry I can't able to help you

Explanation:

[tex]hii[/tex]

have a nice day ✌️✌️

The new pressure inside the syringe will be 1.25 atm

At constant temperatures, the volume of a gas is inversely proportional to its pressure.

Thus:   P1V1 = P2V2

In this case, P1 = 3.0 atm, V1 = 89.6 mL, V2 = 215 mL

P2 = P1V1/V2

                         = 3 x 89.6/215

                              = 1.25 atm

More on gas laws can be found here: https://brainly.com/question/1190311

Answer:

he or she is right

make tissues is the answer

Explanation:

hope this helps :)

Answer:4 1/2 grams.

Explanation:  0.15 is equal to 4 1/2 grams because if you convert ounces into grams 0.15 is equal to 28.35. hope this helped bro.

What happens to temperature as a substance melts and heat energy is used to break the connections between molecules, until all melting is complete?.

Answer : Stays the same

Answer:

B.  4-methylhex-1-ene

Explanation:

There are 6 carbons for the main molecule of 1-hexene.  They are counted from the first (1) on the terminal C with the double bond (ene).  A methyl group is hanging on carbon number 4, so it is the 4-methyl.

4-methylhex-1-ene.

Answer: It can affect the shape of sediment because it is scraping very slowly against it causing it to change,

Explanation:

Answer:

Which statement describes a difference between transcription in eukaryotic and prokaryotic cells?

In eukaryotes, transcription occurs simultaneously with translation, while transcription in prokaryotes must complete before translation can begin..

In eukaryotes, transcription produces a monocistronic RNA, while transcription in prokaryotes produces a polycistronic RNA.

In eukaryotes, transcription produces an RNA molecule, while transcription in prokaryotes produces a DNA molecule.

In eukaryotes, transcription produces an DNA molecule, while transcription in prokaryotes produces a RNA molecule.

In eukaryotes, transcription is completed by an RNA polymerase, while transcription in prokaryotes is completed with a DNA polymerase.

Answer:

The right answer is electrons :)

Answer:

Magnetism is caused by the motion of:

Option 3, electrons.

Explanation:

Because every substance is made up of these tiny units called atoms. And each atom has electrons, particles that carry electric charges.

Hope this helps you out!

1) Hurricane

2) winds blowing from high pressure to low pressure

3) Clock wise rotation

Answer:

Physical conditions like temperature and pressure affect state of matter. ... When thermal energy is added to a substance, its temperature increases, which can change its state from solid to liquid (melting), liquid to gas (vaporization), or solid to gas (sublimation)

Answer:

Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy. As temperature decreases, the particles lose energy. A change in the energy of particles causes a change in their arrangement. A change in the arrangement of particles can lead to a physical change.

Explanation:

on edge 2021

The coefficients that will balance the equation will be 2,3,2.

For a balanced equation, the number of atoms of each element on the reactant side must be equal to those of the product side.

Thus, the balanced equation of the reaction will be:

2Fe + 3Cl2 → 2FeCl3

Consequently, the coefficients of the balanced equation are 2,3,2.

More on balancing chemical equations can be found here: https://brainly.com/question/8062886

Answer:

Inertia.

Explanation:

Its inertia it slows down objects with out it we would fly away.

Answer:

True

Explanation:

All living things are made from many cells

Answer:

[tex]\huge\boxed{True}[/tex]

Explanation:

All living things are composed of cells which are the basic building blocks of living things.

Cell => Tissue => Organ => Organ System => Organism

So, Cell is the "basic" unit of living organism without  which living things cannot be mage or cannot function.

[tex]\rule[225]{225}{2}[/tex]

Hope this helped!