To answer the question above, substitute the given values to the given equation,
Q(t) = Q x e^-kt

12 grams = (36 grams) x e^(-0.00011)(t)

Solving for t gives t = 9,987.38 years or approximately equal to 9,990 years. Thus, the answer is letter C.

4 0

3 years ago

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A chemist needs to neutralize 25.5 L of 3.86 M chloric acid (HClO3). What mass of sodium hydroxide is

Karolina [17]

Answer:

3.94 × 10³ g

Explanation:

Step 1: Write the neutralization reaction

HClO₃ + NaOH = NaClO₃ + H₂O

Step 2: Calculate the moles of chloric acid that react

25.5 L of 3.86 M chloric acid is to be neutralized. The reacting moles are:

$25.5L \times \frac{3.86mol}{L} =98.4mol$

Step 3: Calculate the required moles of sodium hydroxide

The molar ratio of HClO₃ to NaOH is 1:1. Then, the reacting moles of NaOH are 98.4 moles.

Step 4: Calculate the mass of sodium hydroxide corresponding to 98.4 moles

The molar mass of NaOH is 40.00 g/mol.

$98.4mol \times \frac{40.00g}{mol} =3.94 \times 10^{3} g$

6 0

3 years ago

Does a light with low frequency and long wavelength have a lot or little energy?

Rudik [331]

The lower the frequncy the longer the wavelength the longer the wavelength whoch would probably give you more energy.

if im incorrect im truly sorry

7 0

3 years ago