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4 years ago

Is a bugle energy or matter

Chemistry

2 answers:

bagirrra123 [75]4 years ago

8 0

The answer to this question would be energy lol

MariettaO [177]4 years ago

8 0

A bugle would be matter. .
You can clearly see it is a solid object instrument, made up of brass.
Brass is made up of copper and zinc.

This is not energy because energy is the ability to do work (in chemistry)
Kinetic, Potential, Light, Nuclear, or Sound.

If the question asked about the bugle's production of sound, energy or matter?
It would be energy as sound is a type of energy.

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Under what conditions is the change in internal energy, δe rxn , equal to the heat evolved in a chemical reaction?

Stells [14]

the first law says that the change in internal energy of a system is given by:

δ<span>E = δq + δw</span>

where δ<span>E is the i change in internal energy, </span>

<span>δq is the amount of thermal energy added to the system from the surroundings </span>

<span>δw is the l work done *on* the system *by* the surroundings. </span>

<span>For a system only undergoing expansion work,
δw = -p</span>δ<span>V, so: </span>

δE = δq - p δ<span>V </span>
when δV = 0, then δe=δq

4 0

3 years ago

How do the elements in each group differ? How are they similar?

bulgar [2K]

Answer:

All the elements in one group have the same number of valence electrons. ... Since elements in a group have the same number of valence electrons, they behave similarly in chemistry. An example would be the alkali metals (excepting hydrogen. Hydrogen is in this group only because it has one valence electron.

Explanation:

5 0

3 years ago

Read 2 more answers

What is the molarity (M) of .5 liter of a solution that has 205 g of NaCl dissolved in it?

jeka94

Answer:

<h2>Molarity = 7 mol / L</h2>

Explanation:

Since the mass of NaCl and it's volume has been given we can find the molarity by using the formula

<h3> $C = \frac{m}{M \times v}$ </h3>

where

C is the molarity

m is the mass

M is the molar mass

v is the volume

From the question

v = 0.5 L

m = 205 g

We must first find the molar mass and then substitute the values into the above formula

M( Na) = 23 , M( Cl) = 35.5

Molar mass of NaCl = 23 + 35.5 =

58.5 g/mol

So the molarity of NaCl is

$C = \frac{205}{0.5 \times 58.5} \\ C = \frac{205}{29.25}$

C = 7.00854

We have the final answer as

<h3>Molarity = 7 mol / L</h3>

Hope this helps you

8 0

3 years ago

The gas in a balloon occupies 2.25 L at 298 K at what temperature will the balloon expand to 3.50 L

Alenkinab [10]

The temperature that the balloon will expand to 3.50 l is 463.56 K

<em><u> calculation</u></em>

by use of Charles law formula

that is V1/T1 = V2/T2 where;

V1 = 2.25 l

T1= 298 k

V2= 3.50 l

T2=?

make T2 the subject of the formula T2 =(V2 xT1) /v1

T2= (3.50 l x 298 K) /2.25 L = 463.56 K

4 0

4 years ago

The evaporation rate of chloroform (CHCl3) in air has been experimentally measured in an Arnold diffusion cell at 25°C and 1.00

Zanzabum

Answer:

1. C = 0.041 mol/L, 2. Mole Fraction = 0.2632, 3. N(A) = 9.322 x 10⁻⁵ mol/cm².s, 4. D(AB) = 5.688 x 10⁻⁵ cm²/s

Explanation:

Use the ideal gas equation

PV = nRT

Can be re4arranged as

P = nRT/V, where n/V = C

Hence

P = CRT

1. Concentration of air

C = P/RT

C = 101325/(8.314 x 298)

C = 40.89mol/m³ = 0.041 mol/L

2. Mole Fraction of chloroform in air at the liquid- air interface

Mole fraction = vapor pressure(chloroform)/vapor pressure(total)

Mole Fraction = 200/760 = 0.2632

3. Flux of chloroform

N(A) = (D(AB)//Z) . (P(T)/RT) .(P(A1) – P(A2))/P(BM)

P(BM) = (760 – 560)/ln(760/560) = 655 mm Hg

D(AB) = RTP(BM) (Z²₁ – Z²₀)/{2PM(A)(P(A1) – P(A2))}

D(AB) = 8.314 x 298 x 655 (0.0758² – 0.074²)/(2 x 101325 x 0.1195 x 200 x 36000)

D(AB) = 5.688 x 10⁴ = 5.688 x 10⁻⁵cm²/s (multiplying by 10⁴ to convert into cm2)

N(A) = (5.688 x 10⁻⁵)/(7.62) x (101325/8 .314 x 298) x (200/655)

N(A) = 9.322 x 10⁻⁵ mol/cm².s

4. D(AB) has already been calculated in the solution of 3

D(AB) = 5.688 x 10⁻⁵ cm²/s

5 0

3 years ago