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Scrat [10]
3 years ago
7

C. Multiple Choice: Highlight or underline the letter and answer which best matches the question. 1. Which is the method that is

used to separate and recover the parts of a liquid solution? a) Condensation b) Distillation c) Evaporation d) Saturation 2. Which of the following is an example of a solution?​
Chemistry
2 answers:
krek1111 [17]3 years ago
7 0

Answer:

Which is the method that is used to separate and recover the parts of a liquid <em><u>solution-Destillation</u></em><em><u>.</u></em>

Oduvanchick [21]3 years ago
4 0

Answer:

Mam Mayank is joined....

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Which of the following covalent bonds is nonpolar?
zhenek [66]
Option a) H-H is the correct answer
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3 years ago
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which characteristics of an element can be determined by considering only the element’s specific location on the periodic table?
Nadusha1986 [10]

Answer:

Gas, Solid, or liquid

Explanation:

5 0
3 years ago
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Antarctica, almost completely covered in ice, has an area
Marysya12 [62]

<u>Answer:</u> The mass of ice is 2.39\times 10^{22}g

<u>Explanation:</u>

We are given:

Area of Antarctica = 5,500,000mi^2=5,500,000\times 2.59\times 10^{10}=142.45\times 10^{15}cm^2      (Conversion factor:  1mi^2=2.59\times 10^{10}cm^2  )

Height of Antarctica with ice = 7500 ft.

Height of Antarctica without ice = 1500 ft.

Height of ice = 7500 - 1500 = 6000 ft = 182.88\times 10^3cm     (Conversion factor:  1 ft = 30.48 cm)

To calculate mass of ice, we use the equation:

\text{Density of a substance}=\frac{\text{Mass of a substance}}{\text{Volume of a substance}}

We are given:

Density of ice = 0.917g/cm^3

Volume of ice = Area × Height of ice = 142.45\times 10^{15}cm^2\times 182.88\times 10^3cm=26051.26\times 10^{18}cm^3

Putting values in above equation, we get:

0.917g/cm^3=\frac{\text{Mass of ice}}{26051.26\times 10^{18}cm^3}\\\\\text{Mass of ice}=(0.917g/cm^3\times 26051.26\times 10^{18}cm^3=2.39\times 10^{22}g

Hence, the mass of ice is 2.39\times 10^{22}g

5 0
3 years ago
For an ideal gas under constant volume, if the pressure is tripled, what happens to the Kelvin temperature?
EleoNora [17]

Answer:

Increase pressure 3X => increase Temperature 3X

Explanation:

Gay-Lussac Law => T ∝ P => T =kP => Empirical Relationship => T₁/P₁ = T₂/P₂  

=> T₂ = T₁P₂/P₁

Given P₂ = 3P₁ => T₂ = T₁(3P₁)/P₁ = 3T₁

6 0
3 years ago
Toluene, C7H8, is used in the manufacture of explosives such as TNT (trinitrotoluene). A 1.500 g sample of liquid toluene was pl
dusya [7]

Answer:

There were 63.67 kJ liberated

If 1 mol of toluene was burned, there would be liberated 3906 kJ / mole

Explanation:

Step 1: Data given

Mass of the toluene sample = 1.500 grams

The temperature of the calorimeter rose from 25.000 °C to 26.413 °C

<em>Write the balanced chemical equation for the reaction in the calorimeter.</em>

C7H8(l)  +  9O2(g) ⇒  7CO2(g) + 4H2O(l)

<u>Step 2:</u> Calculate Q of the calorimeter

Q = C * Δt

Q = 45.06 kJ/ °C * ( 26.413 - 25)

Q =<u> 63.67 kJ </u>

<u>Step 3:</u> Calculate moles of toluene

Moles toluene = mass toluene / molar mass toluene

Moles toluene = 1.500 grams /92.14 g/mol

Moles toluene = 0.0163 moles

<u>Step 4:</u>  Calculate energy per mole

energy per mole = 63.67 kJ / 0.0163 moles = 3906 kJ / mole

6 0
4 years ago
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