1) H₂(g)+Br₂(g)➝2HBr(g) has a heat of reaction of ___ kJ.

2)CH₄(g)+I₂(g)➝CH₃I(g)+HI(G) has a heat of reaction of ___kj.

3)N₂H₄(I)+O₂(g)➝N₂(g)+ 2 H₂O(g) has a heat of reaction of __kj.

42.4 ml is the volume in milliliters of the lead ball if a lead ball is added to a graduated cylinder containing 50.6 ml of water.

A tall narrow container with a volume scale is used especially for measuring liquids.

The graduated cylinder contains water

mL is a volume unit.

Water volume = 50.6 ml

The lead ball caused an increase in volume from 50.6 ml to 93.0 mL.

The new volume is the lead ball volume plus the original water volume :

Final volume = Vlead ball+ Water original volume

[tex]93.0 mL= V_(lead ball) +50.6 ml[/tex]

[tex]V_(lead ball) = 93.0 mL - 50.6 ml[/tex]

[tex]V_(lead ball) = 42.4 ml[/tex]

Hence, 42.4 ml is the volume in milliliters of the lead ball.

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Answer:

Less expensive than natural fibers

Strong and long-lasting

Easily available

Easy to maintain

Dry up quickly

The statement that is NOT true of fission is B. slow neutrons are fired at a large nucleus.

This is the splitting of large nuclei to smaller ones. It could be a natural or spontaneous dissociation by radioactive decay, or can be initiated in   in a laboratory under required conditions. It involves;

Hence, the statement that is not true about fission is that slow neutrons are fired at a large nucleus.

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Explanation:

help me to find Xian pleaseee:( i miss him so much:(

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Answer:

H3O+

Explanation:

In an aqueous solution, polar water molecules remove one or more hydrogen ions from an acidic molecule (like HCl), leaving behind a negative ion (Cl−). The positive hydrogen ions from the acidic substance bond to water molecules to form hydronium ions (H3O+). In the reaction above, you can see that the acid donates the hydrogen ion. -FLVS

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Answer:

b

Explanation:

Heterogeneous is a mixture of two or more things (phases)...the others are all one phase

Answer:

There is no air pollution

Explanation:

Unless there is a meltdown.

Nuclear plants generate far more power than coal plants

FUEL is needed....nuclear fuel

Leakage CAN happen.... see info on Three Mile Island or Cchernobryl (Ukraine)

The change in temperature had the greatest effect at changing the volume of the balloon.

The gas laws are used to describe the parameters that has to do with gases.

Given that;

P1 = 98.5 kPa

T1 = 18oC or 291 K

V1 =  74.0 dm3

P2 =  7.0 kPa

V2 = ?

T2 = 18oC or 291 K

P1V1/T1 = P2V2/T2

P1V1T2 =P2V2T1

V2= P1V1T2/P2T1

V2 =  98.5 kPa *  74.0 dm3 * 291 K/ 7.0 kPa * 291 K

V2 = 1041.3 dm3

When;

V1 = 1041.3 dm3

T1 = 291 K

V2 = ?

T2 = 80oC or 353 K

V1/T1 = V2/T2

V1T2 = V2T1

V2 = V1T2/T1

V2 = 1041.3 dm3 * 353 K/291 K

V2 = 1263 dm3

The change in temperature had the greatest effect at changing the volume of the balloon.

Given that

V1 =  100 cm^3

T1 = 273 K

P1 = 1.01 * 10^5 Pa

V2 = ?

P2 =  3.00 x 10^-4 Pa

T2 = -180oC or 255 K

V2= P1V1T2/P2T1

V2 =  1.01 * 10^5 Pa * 100 cm^3 * 255 K / 3.00 x 10^-4 Pa * 273 K

V2 = 3.14 * 10^10 cm^3

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Rate = 1.321M/s[H₂CO₃]¹ ; k = 1.32M/s

Answer: 3. a slide show that starts on slide one and goes slide by slide to the end​

Explanation:

       An outline is typically a plan with lists of steps and details about the timing, order, etc. In this case, the option that would most need a clear outline is option 3.

        A slide show that starts on slide one and goes slide by slide to the end​.

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Answer: a slide show that starts on slide one and goes slide by slide to the end​

Explanation:

Answer: C. CO₂ and H₂O

Explanation:

Combustion reactions produce carbon dioxide and water.

The specific heat of the metal is calculated using the change in temperature, heat, and mass. The specific heat of the metal is 0.21 J/g °C.

Heat energy is a transfer of the energy lost by a system to the energy gained by another system. The calorimeter is used to measure the specific heat of the system.

Given,

Mass of metal = 500 gm

Temperature = 100 °C

Mass of water = 250 gm

Temperature = 40 °C

Specific heat of water = 4.184 J/g °C

The specific heat (c) of metal is calculated as:

Q = mC ΔT

and, Q (metal) = Q (water)

Substituting values in the above equation:

(500 )(c)(100) = (250)(4.184)(50-40)

50000 c = 10460

c = 0.21 J/g °C

Therefore, the specific heat of metal is 0.21 J/g °C.

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Answer: The energy of the products exceeds the activation energy threshold.

Explanation:

In the reverse reaction, the reactants of the forward reaction are now the products of the reverse reaction and vice versa.

This means that normally since you would need the energy of the reactants of the forward reaction to exceed the activation energy threshold, in the reverse reaction, the energy of the products would need to exceed the activation energy threshold.

When there are two bond pairs and one lone pair, the molecule will have a bent molecular shape.

The shape of a molecule depends on the orientation and number of electron pairs on the valence shell of the central atom in the molecule. This is based on the postulates of the valence shell electron pair repulsion theory.

When there are two bond pairs and one lone pair, the molecule will have a bent molecular shape.

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the cut pieces will have their own north and south pole

Answer: You would need 0.67 liters of the concentrated acid. ... To solve for V 1 , multiply 4.0 Molar by 3.00 L and divide by 18.0 M. V1 = M2.V2M1.

Explanation:

The balloon must be heated to a temperature of 150 °C in order to have a volume of 6.00 L.

The volume of a gas is directly proportional to the temperature of the gas.

According to Charles' law: V1/T1 / = V2/T2

V1 =4.0 L

T1 = 9°C = (273. + 9) K = 282 K

V2 = 6.0 L

T2 = ?

T2 = V2×T1/V1

T2 = 6 × 282 / 4 = 423 K

423.2 K = 423 -273 = 150 °C

Therefore, the balloon must be heated to a temperature of 150 °C in order to have a volume of 6.00 L.

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Answer:

Approx. 38.61 grams

D

Explanation:

B/c both the hydrogen and chlorine have the same valance number so if a metal or non metal have the same valance number you should cancel out the numbers and you will have to put only the non metal or metals.

Answer:  

Molecular polarity

Explanation:

tell me if im right

The mass percent of oxygen in Nickel([tex]III[/tex])sulfate is [tex]23.68[/tex] percent.

At first, we look up the atomic masses for the element from the periodic table.

The atomic masses are found to be:

Next, we determine how many grams of each element are present in one mole of [tex]Ni_{2}(SO_{4})_{3}[/tex]

The mass of one mole  [tex]Ni_{2}(SO_{4})_{3}[/tex] is:

[tex]117.4g+96g+192g=405.4g[/tex]

So, The mass percent of oxygen [tex]=(96g/405.4)*100=0.2368*100%\\[/tex]

                                                    [tex]=23.68 %[/tex] percent.

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Answer:

C. carbon-carbon double bond

Explanation:

A reaction in which two or more molecules combine together to result in the formation of a larger molecules then this type of reactions are known as addition reactions.

Usually compounds which contain a double bond undergo addition reactions.

For example, a compound with carbon-carbon double bond, carbonyl group, imine group etc undergo addition reaction.

Thus, we can conclude that in an addition reaction, carbon carbon double bond of the reactant is broken.

Carbon-carbon double bonds (unsaturations) are found in naturally occurring fatty acids.

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https://library.med.utah.edu/NetBiochem/FattyAcids/3_2.html

[tex]\\ \rm\Rrightarrow Density=\dfrac{Mass}{Volume}[/tex]

[tex]\\ \rm\Rrightarrow Volume=\dfrac{Mass}{Density}[/tex]

[tex]\\ \rm\Rrightarrow Volume=\dfrac{0.19}{0.0076}[/tex]

[tex]\\ \rm\Rrightarrow Volume=25cm³[/tex]

[tex]\\ \rm\Rrightarrow Volume=25mL[/tex]

Answer:

true

Explanation:

they can not be stored within the vesicles

The substance that will form a solution when mixed with solid sodium chloride would be  CH₂OH

A solution is only formed when a solute dissolves in a solvent.

In this case, [tex]CCl4_[/tex] and  CH₂OH are the only liquid solvents. However, NaCl is insoluble in [tex]CCl_4[/tex] while it is soluble in  CH₂OH due to its polarity.

Thus, NaCl can form a solution only with  CH₂OH.

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The substance that will form a solution when mixed with solid sodium chloride would be  CH₂OH.

A solution is only formed when a solute dissolves in a solvent.

In this case, CH₂OH are the only liquid solvents. However, NaCl is insoluble in while it is soluble in  CH₂OH due to its polarity and Common-Ion Effect.

Thus, NaCl can form a solution only with CH₂OH.

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The volume of the unit cell is 2.67 x 10⁻²⁸ m³.

In a body-centered cubic unit cell, the volume occupied by the particles of the substance is about 68% of the total unit cell.

Assuming that a single atomic a sphere, the volume is:

Volume(atom) = 4/3 x π x r³

Volume(atom) = 4/3 x π x (169 x 10⁻¹²)³

Volume(atom) = 2.02 x 10⁻²⁹ m³

There are a total of 9 atoms in a body-centered unit cell, so the total volume occupied by atoms is:

2.02 x 10⁻²⁹ x 9

= 1.82 x 10⁻²⁸ m³

Volume of cell = (1.15 x 10⁻²⁸ ) / 0.68

Volume of cell = 2.67 x 10⁻²⁸ m³

Therefore, the volume of the unit cell is 2.67 x 10⁻²⁸ m³.

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Answer:

amine

Explanation:

amine is a base

base would neutralize an acid

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Answer:

amine

Explanation:

The temperature is the same, so the amount of kinetic energy will also be the same.

Explanation:

potential energy is the correct answer