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gavmur [86]
3 years ago
7

A hot air ballon rises because?

Chemistry
1 answer:
Mamont248 [21]3 years ago
5 0

Answer:

a

Explanation:

a. molecules become lighter when heated

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Ok the ML (the 3rd number) is not legit because the ML value can only be from -L to L (the second value)
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David walks 10 Km North. He turns East and walks 10 more Km. What is his distance
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Is sodium oxide an acidic oxide or a basic oxide
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In a particular redox reaction, Cr is oxidized to CrO42– and Cu2 is reduced to Cu . Complete and balance the equation for this r
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3 years ago
The pH of a solution prepared by the addition of 100mL 0.002M HCL to 100mL distilled water is closest to:
IRISSAK [1]

Answer:

d.3.0

Explanation:

Step 1: Calculate the final volume of the solution

The final volume is equal to the sum of the volumes of the initial HCl solution and the volume of distilled water.

V₂ = 100 mL + 100 mL = 200 mL

Step 2: Calculate the final concentration of HCl

We will use the dilution rule.

C₁ × V₁ = C₂ × V₂

C₂ = C₁ × V₁/V₂ = 0.002 M × 100 mL/200 mL = 0.001 M

Step 3: Calculate the pH of the final HCl solution

Since HCl is a strong acid, [H⁺] = HCl. We will use the definition of pH.

pH = -log [H⁺] = -log 0.001 = 3

7 0
3 years ago
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