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3 years ago

When is it appropriate to use models?

Chemistry

1 answer:

Alexxandr [17]3 years ago

4 0

your answer should be the last one: models should be used when needed to explain or predict data being represented.

hope this helps :)

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0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20°C. The gas then undergoes heating at constant volume to

dolphi86 [110]

Answer: The final pressure of the gas is 9.41 atm

Explanation:

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

$PV=nRT$

where,

P = pressure of the gas = ?

V = Volume of gas = $50cm^3=0.05L$ (Conversion factor: $1L=1000cm^3$ )

n = Number of moles = 0.01 mol

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

T = temperature of the gas = $300^oC=[300+273]K=573K$

Putting values in above equation, we get:

$P\times 0.050L=0.01\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 573K\\\\P=\frac{0.01\times 0.0821\times 573}{0.05}=9.41atm$

Hence, the final pressure of the gas is 9.41 atm

5 0

4 years ago

Identify the power of ten that defines each of these prefixes. Input your answers as 10 x where x is the power of ten. nano- ___

Gemiola [76]

Answer: The quantity of every prefix is written below as a power of ten.

Explanation:

In the metric system of measurement, the name of multiples and subdivision of any unit is done by combining the name of the unit with the prefixes.

For Example: deka, hecto and kilo means 10, 100 and 1000 respectively. Deci, centi and milli means one-tenth, one-hundredth, and one-thousandth respectively.

The quantity of these prefixes are written as the power of 10.

For the given prefixes:

Nano: The quantity will be $10^{-9}$

Kilo: The quantity will be $10^3$

Centi: The quantity will be $10^{-2}$

Micro: The quantity will be $10^{-6}$

Milli: The quantity will be $10^{-3}$

Mega: The quantity will be $10^6$

Hence, the quantity of every prefix is written above as a power of ten.

7 0

4 years ago

What role do guanacos play in the Andes Mountains ecosystem?.

Nikitich [7]

Grasses and plants are producers, guanacos are herbivores and are primary consumers and pumas are predators and secondary consumers

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3 years ago

Why does oxygen exist as a diatonic molecule and not simply the O atom

Brrunno [24]

Answer:

Oxygen exists as a diatomic molecule in nature when it is not combined with any other element. It forms O2 molecule because it is stable when it is uncombined. It has the lowest energy level when uncombined. ... By achieving octet configuration, the diatomic elements become more stable compared to the single atom.

Explanation:

plsssss.... Mark me as the brainliest

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2 years ago

1: Scrieţi şi egalaţi ecuaţiile reacţiilor chimice de schimb prezentate mai jos: a) carbonat de sodiu + clorură de calciu = b) c

prisoha [69]

Answer:

AMBANTOT MO MALIGO KANA

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3 years ago