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3 years ago

PLEASE HELP PLEASE HELP PLEASE HELP

Chemistry

1 answer:

Katen [24]3 years ago

5 0

Answer: To increase the flow of fluid in our everyday lives, you need to get some exercise.

Explanation: You're welcome and can you pls give me the brainiest

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The vapor pressure of water at 80 °C is 355.3 torr. Calculate the vapor pressure in mm Hg and atm. Be sure your answers have the

Darya [45]

Answer:

0.4675 atm, 355.3 mmHg

Explanation:

Given:

Pressure = 355.3 torr

The conversion of P(torr) to P(atm) is shown below:

$P(torr)=\frac {1}{760}\times P(atm)$

So,

Pressure = 355.3 / 760 atm = 0.4675 atm

The conversion of P(torr) to P(mmHg) is shown below:

$P(torr)=1\times P(mmHg)$

So,

Pressure = 355.3 mmHg

8 0

3 years ago

Lead nitrate can be decomposed by heating. what is the percent yield of the decomposition reaction if 9.9 g of pb(no3)2are heate

Helga [31]

The answer is 82%. . .

5 0

3 years ago

When a 120g sample of aluminum absorbs 9612 J of energy its temperature increases from 298K to 388K. Find the specific heat of t

Iteru [2.4K]

Specific heat of Aluminium is 0.89 g/J

Explanation:

Step 1 :

Specific heat of a substance is the energy absorbed by a substance of unit mass when its temperature increases by one degree.

Energy Absorbed = Specific Heat * Mass of the substance * Temperature Difference

Step 2 :

It is given that 120 g sample absorbs 9612 J energy when the temperature increases from 298K to 388K.

Temperature Difference = 388 K - 298 K = 90 K

Step 3:

Specific Heat = (Energy Absorbed) ÷ (Mass of the substance * Temperature Difference)

Specific Heat = 9612 ÷ (120 * 90) = 0.89 grams / Joule

Step 4:

Answer:

Specific heat of Aluminium is 0.89 g/J

6 0

4 years ago

How many molecules of CaCL2 are equivalent to 75.9g CaCl2

disa [49]

The answer is around 4.12x10^23 molecules

3 0

3 years ago

A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is

Airida [17]

Answer:

the maximum safe operating temperature the engineer should recommend for this reaction is 616 °C

Explanation:

Given the data in the question;

First we calculate the Volume of the steel cylinder;

V = πr²h

radius r = Diameter / 2 = 27 cm / 2 = 13.5 cm

height h = 32.4 cm

so we substitute

V = π × ( 13.5 cm )² × 32.4 cm

V = π × 182.25 cm × 32.4 cm

V = 18550.79 cm³

V = 18.551 L

given that; maximum safe pressure P = 3.10 MPa = 30.5946 atm

vessel contains 0.218kg or 218 gram of carbon monoxide gas

molar mass of carbon monoxide gas is 28.010 g/mol

moles of carbon monoxide gas n = 218 gram / 28.010 g/mol = 7.7829 mol

we know that;

PV = nRT

solve for T

T = PV / nR

we know that gas constant R = 0.0820574 L•atm•mol⁻¹ K⁻¹

so we substitute

T = ( 30.5946 × 18.551 ) / ( 7.7829 × 0.082 )

T = 567.5604 / 0.6381978

T = 889.317387 K

T = ( 889.317387 - 273.15 ) °C

T = 616.167 ≈ 616 °C { 3 significant digits }

Therefore, the maximum safe operating temperature the engineer should recommend for this reaction is 616 °C

6 0

3 years ago