3 years ago

Which best describes the conservation of energy as a pendulum swings in the path shown ?

Chemistry

1 answer:

Nezavi [6.7K]3 years ago

5 0

The answer would be F

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A photon has a wavelength of 750 no. What is the energy in joules

zhuklara [117]

Answer:

750

Explanation:

750

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3 years ago

The heavier a gas molecule,

mr_godi [17]

Answer:

Explanation:

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4 years ago

The K w for water at 0 ∘ C is 0.12 × 10 − 14 M 2 . Calculate the pH of a neutral aqueous solution at 0 ∘ C . p H = Is a pH = 7.2

Karo-lina-s [1.5K]

Answer:

pH → 7.46

Explanation:

We begin with the autoionization of water. This equilibrium reaction is:

2H₂O ⇄ H₃O⁺ + OH⁻ Kw = 1×10⁻¹⁴ at 25°C

Kw = [H₃O⁺] . [OH⁻]

We do not consider [H₂O] in the expression for the constant.

[H₃O⁺] = [OH⁻] = √1×10⁻¹⁴ → 1×10⁻⁷ M

Kw depends on the temperature

0.12×10⁻¹⁴ = [H₃O⁺] . [OH⁻] → [H₃O⁺] = [OH⁻] at 0°C

√0.12×10⁻¹⁴ = [H₃O⁺] → 3.46×10⁻⁸ M

- log [H₃O⁺] = pH

pH = - log 3.46×10⁻⁸ → 7.46

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3 years ago

A car is traveling at a speed of 95 mi/h. If there are 0.62137 miles (mi) in a kilometer,

SIZIF [17.4K]

Answer:

42 m/s

Explanation:

To we convert units for speed we can use dimensional analysis. First thing we do is seperate the measurement into a fraction. After this we can multiply by 1km over 0.62137 miles. We do this so that the miles cancel out.

$\frac{95mi}{h}$ × $\frac{1km}{0.62137mi}$ = $\frac{95km}{0.62137h}$

After this we can use a conversion factor and divide by 3.6.

$\frac{95km}{0.62137h}$ ÷ 3.6 = 42 m/s

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3 years ago

You are given 100 g of a compound. The compound is composed of 37% hydrogen and 63% oxygen. How many grams of hydrogen are prese

Reil [10]

B is the best answer

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3 years ago