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3 years ago

1 pts

Chemistry

2 answers:

scZoUnD [109]3 years ago

7 0

<h3>Answer: C) Evaporation</h3>

You should boil a pot of salt water. As the water evaporates, it leaves the salt behind. The water molecules go into the air to make water vapor. The more water in the air, the more humid the air will be. The salt particles won't go into the air and won't evaporate. They simply are left behind in the pot. Since water evaporates best when its surface makes contact with the air, you should get a pot that has the largest surface area to speed up the evaporation process.

You could also place spoonfuls of water onto a piece of construction paper to spread out the water over a larger area. Place the paper on a dish to collect the water that seeps through (though the water will eventually evaporate). Placing the dish in the sunlight speeds up the process. Though keep in mind that evaporation is a slow process in general.

bonufazy [111]3 years ago

5 0

Answer:

secound one is the answer: Distillation

this may help you

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How many atoms are in 10.1 g Ne

LekaFEV [45]

Answer:

3.01 × 10²³ atoms Ne

General Formulas and Concepts:

Atomic Structure

Reading a Periodic Tables
Moles

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

Identify

[Given] 10.1 g Ne

[Solve] atoms Ne

Step 2: Identify Conversions

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

[PT] Molar Mass of Ne: 20.18 g/mol\

Step 3: Convert

[DA] Set up: $\displaystyle 10.1 \ g \ Ne(\frac{1 \ mol \ Ne}{20.18 \ g \ Ne})(\frac{6.022 \cdot 10^{23} \ atoms \ Ne}{1 \ mol \ Ne})$
[DA] Divide/Multiply [Cancel out units]: $\displaystyle 3.01398 \cdot 10^{23} \ atoms \ Ne$

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

3.01398 × 10²³ atoms Ne ≈ 3.01 × 10²³ atoms Ne

4 0

3 years ago

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Sonbull [250]

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3 0

3 years ago

How many moles of gas are in a 1.0 liter canister if the temperature of the canister is 100 K and the pressure is 100 atmosphere

ladessa [460]

Answer:

n = 12.18 moles

Explanation:

Given that,

The volume of a canister, V = 1 L

The temperature of the canister, T = 100 K

Pressure, P = 100 atm

We need to find the number of moles of gas. Let there are n number of moles. We know that,

PV = nRT

Where

R is gas constant, R = 0.0821 L*atm/mol*K

$n=\dfrac{PV}{RT}\\\\n=\dfrac{100\times 1}{0.0821 \times 100}\\\\n=12.18\ moles$

Hence, there are 12.18 moles of gas.

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miv72 [106K]

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aivan3 [116]

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