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3 years ago

What is the volume of 80.0 g of ether if the density of ether is 0.70 g/mL

Chemistry

1 answer:

Serggg [28]3 years ago

6 0

Density = 0.70 g/mL

Mass = 80.0 g

Volume = ?

V = m / D

V = 80.0 / 0.70

V = 114.28 mL

hope this helps!

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PLEASE HELP!!!!!!! CHEMISTRY!!!!

AnnZ [28]

Answer:

dude im sorry for your loss best of luck to you and your answer search

Explanation:

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3 years ago

How many grams of helium must be released to reduce the pressure to 65 atmatm assuming ideal gas behavior? Express the answer in

lyudmila [28]

The question is incomplete, here is the complete question:

How many grams of helium must be released to reduce the pressure to 65 atm assuming ideal gas behavior. Note : 334-mL cylinder for use in chemistry lectures contains 5.209 g of helium at 23°C.

Answer: The mass of helium released is 1.6 grams

Explanation:

We are given:

Mass of helium in the cylinder = 5.209 g

To calculate the number of moles, we use the equation given by ideal gas equation:

PV = nRT

Or,

$PV=\frac{w}{M}RT$

where,

P = Pressure of the gas = 65 atm

V = Volume of the gas = 334 mL = 0.334 L (Conversion factor: 1 L = 1000 mL)

w = Weight of the gas = ?

M = Molar mass of helium gas = 4 g/mol

R = Gas constant = $0.0821\text{ L atm }mol^{-1}K^{-1}$

T = Temperature of the gas = $23^oC=[23+273]K=296K$

Putting values in above equation, we get:

$65atm\times 0.334L=\frac{w}{4g/mol}\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 296K\\\\w=\frac{65\times 0.334\times 4}{0.0821\times 296}=3.573g$

Mass of helium released = (5.209 - 3.573) g = 1.636 g = 1.6 g

Hence, the mass of helium released is 1.6 grams

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3 years ago

Why is scientific notation used?

Setler [38]

The correct option is (d) To express very large or very small number.

What is the Scientific Notation?

Scientific notation is a way to present numbers that are too large or too small to be easily written in decimal form. The three components of scientific notation are coefficient, base and exponent. The proper format to write a scientific notation is a x 10^b, where a is a number or decimal number and b is the power of 10 to make scientific notation equivalent to original number. When a number between 1 and 10 is multiplied by a power of 10 then the number is expressed in scientific notation. For example, 10000000 can be written as 10⁷, which is the scientific notation and the exponent is positive here. Similarly, for the negative exponent 0.000001 can be can be represented as 10-⁷. Hence, the scientific notation is used to express very large or very small numbers.

Learn more about Scientific Notation here: brainly.com/question/15361382

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2 years ago

What is the melting point of wrought iron in degrees celcius?

Flura [38]

The melting point of iron is 2,800°F or 1,538°C.

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What happen when chlorine gas is passed into concentrated solution of naoh

mars1129 [50]

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Explanation: Hope it helps :)

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