A molecular formula shows the arrangement of the atoms in a molecule. True or False?

What is the change in freezing

loris [4]

-1.09'C is the change in freezing point

“Freezing point depression” depends on the solvent and the molar concentration of the solute.

Sulfide is highly basic, consequently

K2S

completely and irreversibly hydrolyzes in water according to the following equation:

K2S+H2O→KOH+KSH

<h3>What is freezing?</h3>

Freezing, also known as solidification, is a phase transition where a liquid turns into a solid when its temperature is lowered below its freezing point.

the temperature at which a liquid solidifies specifically : the temperature at which the liquid and solid states of the substance are in equilibrium at atmospheric pressure : melting point the freezing point of water is 0° Celsius or 32° Fahrenheit.

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5 0

2 years ago

Find the molecules in 32 grams of CH4

Elena L [17]

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<h3>Answer = 2</h3>

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<h3>Known</h3>

Mass = 32grams

Name of atom = Methane (CH4)

Molar mass C = 12

Molar mass H = 1

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<h3>Question</h3>

molecules (mol?)

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mass = mol × molar mass

32g = mol × (CH4)

33g = mol × (12 + (4×1))

32g = mol × 16

mol = 32 : 16

mol = 2

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#Ey tell me if its mol or total particles

8 0

3 years ago

A Helium gas in a tube with a volume of 9.583 L under pressure of 4.972 atm at 31.8 c

andre [41]

1.905 moles of Helium gas are in the tube. Hence, option A is correct.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Calculate the moles of the gas using the gas law,

PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.

Given data:

P= 4.972 atm

V= 9.583 L

n=?

R= $0.082057338 \;L \;atm \;K^{-1}mol^{-1}$

T=31.8 +273= 304.8 K

Putting value in the given equation:

$\frac{PV}{RT}$ =n

n= $\frac{4.972 \;atm\; X \;9.583 \;L}{0.082057338 \;L \;atm \;K^{-1}mol^{-1} X 304.8}$

Moles = 1.905 moles

1.905 moles of Helium gas are in the tube. Hence, option A is correct.

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3 0

2 years ago

How does population density effect population growth?

Ronch [10]

Population growth decreases as the population density increases. This may be true for non-human populations but our species has developed the ability to modify the environment to sustain a huge population size.

hope this helps

IN exchange can u mark me as brainlist

7 0

4 years ago

Ivanshal [37]

Answer:

$HCl conc=2.2M$