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2 years ago

I will mark brainlist if correct !! :) PLS HELPPP

Chemistry

1 answer:

Soloha48 [4]2 years ago

6 0

<h2>Answer: Option B</h2>

Option A is incorrect. Heated water cannot freeze.

Option B is correct. Heated water will evaporate.

Option C is incorrect. Heated water cannot create condensation.

Option D is incorrect. Water can't melt when heated unless it's been frozen beforehand.

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What do hydroelectric plants use to turn a turbine when producing electrical energy?

oksian1 [2.3K]

A. water
the word hydro means water

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2 years ago

Ammonium chloride is used as an expectorant in cough medicine. It has a density of 1.53 g/cm^3. What is the mass of 26.0L of thi

Katena32 [7]

Answer:

39.78 Kg

Explanation:

Data Given;

Density = 1.53 g/cm³

Mass = ??

Volume = 26.0 L = 26000 cm³

Formula Used;

The measure of mass per unit volume is called as density. It is a physical property of a substance and tells how tightly the particles are packed. Mathematically;

Density = Mass ÷ Volume

Solving for Mass,

Mass = Volume × Density

Putting values,

Mass = 26000 cm³ × 1.53 g.mL⁻¹

Mass = 39780 g or 39.78 Kg

8 0

3 years ago

Calculate the heat required to convert 10g of water at 100 c to steam at 100 c the specific heat of water is 1.00 cal the heat o

sladkih [1.3K]

Heat of vaporization of water will be required as water is already at it's boiling point thus heat required will be 540*10=5400 cal

3 0

2 years ago

Calculate the molality, molarity, and mole fraction of FeCl3 in a 29.5 mass % aqueous solution (d = 1.283 g/mL).

faltersainse [42]

Answer:

molality FeCl3= 2.579 molal

molarity FeCl3 = 2.333 M

mol fraction FeCl3 = 0.0444

Explanation:

Step 1: Data given

Mass % = 29.5 %

Density = 1.283 g/mL

Molar mass FeCl3 = 162.2 g/mol

Step 2: Calculate mass solution

Suppose we have 1L = 1000 mL solution

Mass solution = 1.283 g/mL * 1000 mL = 1283 grams

Step 3: Calculate mass FeCl3

Mass FeCl3 = 0.295 * 1283 grams

Mass FeCl3 = 378.485 grams

Step 4: Calculate mass of water

Mass water = 1283 - 378.485 = 904.515 grams

Step 5: Calculate moles FeCl3

Moles FeCl3 = mass FeCl3 / molar mass FeCl3

Moles FeCl3 = 378.485 grams / 162.2 g/mol

Moles FeCl3 = 2.333 moles

Step 6: Calculate moles H2O

Moles H2O = 904.515 grams / 18.02 g/mol

Moles H2O = 50.195 moles

Step 7: Mol fraction FeCl3

Mol fraction FeCl3 = 2.333 / (50.195+2.333)

Mol fraction FeCl3 = 0.0444

Step 8: Calculate molality

Molality = moles FeCl3 / mass H2O

Molality = 2.333 moles / 0.904515 kg

Molality = 2.579 molal

Step 9: Calculate molarity

Molarity = moles / volume

Molarity FeCl3 = 2.333 moles / 1 L

Molarity FeCl3 = 2.333 M

8 0

3 years ago

What is an air pressure system?

Anna35 [415]

Answer:

"The number of air molecules above a surface determines air pressure. As the number of molecules increases, they exert more pressure on a surface, and the total atmospheric pressure increases. By contrast, if the number of molecules decreases, so too does the air pressure."

7 0

2 years ago