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An empty Erlenmeyer flask weighs 241.3 g. When filled with water (d = 1.00 g/cm³), the flask and its contents weigh 489.1 g.

Viefleur [7K]

The answer is- Mass of flask = 608.04 g

Density (d) is defined as mass of substance divided by its volume. Thus, if mass and density are known, then Volume can be determined.

What is the formula of mass in terms of density?

Let mass of substance be 'm' and volume be 'V'. Thus, as per the definition of density, it is expressed as-

$d = \frac{m}{V}$

Thus, mass can be expressed as-

$m = d * V$

Now, mass of empty flask = 241.3 g and the mass of (flask + Water) = 489.1 g.

Thus, mass of water = $489.1\ g- 241.3\ g = 247.8\ g$ .

Thus, mass of water = 247.8 g and density of water = $1.00\ g/cm^3$ . Its volume is calculated as-

$V = \frac{247.8\ g}{1.00\ g/cm^3}=247.8\ cm^3$

Volume of flask = 247.8 $cm^3$ .
Then when this flask is filled with chloroform (d = $1.48 g/cm^3$ ), the mass of chloroform is-

$m = d * V = (1.48\ g/cm^3) * (247.8\ cm^3)= 366.74\ g$

Hence, the mass of flask becomes = $241.3\ g + 366.74\ g = 608.04\ g$

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4 0

1 year ago

What is added to make solid ice change to liquid water and then to gaseous steam.

vekshin1

Answer: heat

Explanation: if solid ice is heated it becomes in liquid and then to gaseous steam.

8 0

3 years ago

An equilibrium mixture of PCl₅(g), PCl₃(g), and Cl₂(g) has partial pressures of 217.0 Torr, 13.2 Torr, and 13.2 Torr, respective

Papessa [141]

Answer:

PCl₅ = 223.4 torr

PCl₃ = 6.8 torr

Cl₂ = 26.4 torr

Explanation:

For gas substances, the equilibrium constant can be calcultaed based on the partial pressures (Kp). For a generic reaction:

aA(g) + bB(g) ⇄ cC(g) + dD(g)

$Kp = \frac{(pC)^c*(pD)^d}{(pA)^a*(pB)^b}$ , where pX is the partial pressure of X.

The reaction with the gas mixture given is:

PCl₅(g) ⇄ PCl₃(g) + Cl₂(g)

Kp = [(pPCl₃)*(pCl₂)]/(pPCl₅)

Kp = [13.2*13.2]/217

Kp = 0.803

When more Cl₂ is added, for Le Chatêlier's principle, the equilibrium will shift for the left, more PCl₅ will be formed, and the equilibrium will be reestablished.

The initial total pressure was 243.4 torr, so if it jumps to 263.0 torr, it was added 19.6 torr of Cl₂, so the partial pressure of Cl₂ is 32.8 torr. For the reaction:

PCl₅(g) ⇄ PCl₃(g) + Cl₂(g)

217.0 13.2 32.8 Initial

+x -x -x Reacts (stoichiometry is 1:1:1)

217 + x 13.2-x 32.8-x Equilibrium

So, the equilibrium constant must be:

$Kp = \frac{(13.2-x)*(32.8-x)}{217+x}$

0.803 = (432.96 - 46x + x²)/(217 + x)

432.96 - 46x + x² = 174.251 + 0.803x

x² - 46.803x + 258.71 = 0

By Bhaskara's equation:

Δ = (46.803)² - 4*1*258.71

Δ = 1,155.68

x =[-(- 46.803) ±√1,155.68]/2

x' = (46.803 + 33.99)/2

x' = 40.40

x'' = (46.803 - 33.99)/2

x'' = 6.40

x < 32.8, so x = 6.40

The new partial pressures are:

PCl₅ = 217.0 + 6.40 = 223.4 torr

PCl₃ = 13.2 - 6.40 = 6.8 torr

Cl₂ = 32.8 - 6.40 = 26.4 torr

6 0

4 years ago

The base unit of measurement of liquids and volume.

Gemiola [76]

Answer:

Liters

Explanation:

3 0

4 years ago

After World War II, which of the following changes occurred in Germany?

Tresset [83]

Answer:

Germany became 2 separate countries

Explanation:

They were know as west and east Berlin. one controlled by soviet russia and one (east). And the west by a series of western nations such as France and britain the largest of which being the US

4 0

3 years ago