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JulijaS [17]
3 years ago
5

How are diffusion and osmosis different?

Chemistry
1 answer:
elena55 [62]3 years ago
8 0
Osmosis is about the movement of water molecules and diffusion is about the movement of substances
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Chemistry: An oxygen gas container has a volume of 20.0 L. How many grams of oxygen are in the container, if the gas has a press
Morgarella [4.7K]

Answer:

There are 29.4 grams of oxygen in the container

Explanation:

<u>Step 1: </u>Data given

Volume = 20.0 L

Pressure = 845 mmHg

Temperature = 22.0 °C

Molar mass of O2 = 32 g/mol

<u>Step 2:</u> Ideal gas law

p*V = n*R*T

⇒ p = the pressure of the gas = 845 mmHg = 1.11184

⇒ V = the volume of the gas = 20.0 L

⇒ n = the number of moles = TO BE DETERMINED

⇒R = the gasconstant = 0.08206 L*atm/K*mol

⇒ T = the temperature = 22°C + 273 = 295 Kelvin

n = (p*V)/(R*T)

n = (1.11184*20.0)/(0.08206*295)

n = 0.9186 moles

<u>Step 3:</u> Calculate mass of NO2

Mass of O2 = Moles O2 * Molar mass O2

Mass of O2 = 0.9186 moles * 32 g/mol

Mass of O2 = 29.4 grams

There are 29.4 grams of oxygen in the container

8 0
3 years ago
The sum of the oxidation numbers of all atoms in a neutral compound is
Phoenix [80]
The sum of the oxidation numbers of all atoms in a neutral compound is zero.
5 0
3 years ago
Read 2 more answers
Which state of matter has a definite volume, but does not have a definite shape?
evablogger [386]

Answer:

Liquid, definite volume but no definite shape.

Explanation:

7 0
3 years ago
How do kidneys work with other body systems to maintain homeostasis
Advocard [28]
Kidneys<span> filter the extra water and toxic materials in your blood (circulatory </span>system<span>). The help </span>maintain homeostasis<span> by keeping the level of toxic materials down in your</span>body<span>. The filtered materials are sent, with the extra water, to your bladder , where it is known as urine/ pee.</span>
7 0
3 years ago
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A block of wood has a volume of 64 cm3 and a mass of 46 grams. What is the density of the block?
Rom4ik [11]

The correct answer is 0.72 g/cm3

Explanation:

The density of a material depends on both its mass (amount of matter), which is usually provided in grams (g), and its volume (space occupied), which is provided in units such as cubic centimeters cm3. Moreover, to find how dense the material is, take the mass and divide it into the volume. The process for finding the density of the block of wood is shown below:

d = \frac{m}{v}

d = \frac{46 g}{64 cm3}

d = 0.718 g/cm3

This means the density is 0.71g/cm3 and this can be rounded to 0.72 g/cm3

3 0
3 years ago
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