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givi [52]
3 years ago
5

If a drum skin vibrates with a frequency of 100 Hz, how many times does it move up and down each second?

Chemistry
1 answer:
bogdanovich [222]3 years ago
4 0
100 HZ the drum will move up and down 30 each second
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6. Which of the following chemical reactions is most likely to have the largest equilibrium constant K?
madreJ [45]
The answer to this question is <span>HCl(aq) + H2O(l) = H3O+(aq) + Cl-(aq). HCl is considered a strong acid meaning it is 100% ionized in solution. The equilibrium constant is therefore very large.
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8 0
3 years ago
Part III.The two reactions involved in quantitatively determining the amount of iodate in solution are: IO3-(aq) 5 I-(aq) 6 H (a
slega [8]

Answer:

\large \boxed{\math{\dfrac{\text{6 mol thiosulfate}}{\text{1 mol iodate}}}}

Explanation:

The I₂ is the common substance in the two equations.

(1) IO₃⁻ + 5I⁻ + 6H⁺ ⟶ 3I₂ + 3H₂O

{2) I₂ + 2S₂O₃²⁻ ⟶ 2I⁻ + S₄O₆²⁻

From Equation (1), the molar ratio of iodate to iodine is

\dfrac{\text{I}_{2}}{\text{IO}_{3}^{-}} = \dfrac{3}{1}

From Equation (2), the molar ratio of iodine to thiosulfate is

\dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{I}_{2}} = \dfrac{2}{1}

Combining the two ratios, we get

\text{Stoichiometric factor} = \dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{IO}_{3}^{-}} = \dfrac{\text{S$_{2}$O}_{3}^{2-}}{\text{I}_{2}} \times \dfrac{\text{I}_{2}}{\text{IO}_{3}^{-}} = \dfrac{2}{1} \times \dfrac{3}{1} = \mathbf{\dfrac{6}{1}}\\\\\text{The stoichiometric factor is $\large \boxed{\mathbf{\dfrac{\text{6 mol thiosulfate}}{\text{1 mol iodate}}}}$}

7 0
3 years ago
If a car traveling 85.0 kilometers per hour how many feet will it travel in 5.00 seconds
Maslowich

The car will travel 387 ft in 5.00 s.

No. of kilometres = 5.00 s × (1 min/60 s) × (1 h/60 min) × (85.0 km/h) = 0.1181 km

No of feet = 0.1181 km × (1 mi/1.609 km) × (5280 ft/1 mi) = 387 ft


4 0
4 years ago
If a body was lying on their back when they died, and was moved to their front after 12 hours, where would one see the skin disc
My name is Ann [436]

Answer:the parts of the body which is nearest to  the ground ie thier back will show discoloration

Explanation:

If the body remains at a position for long hours, the parts of the body which is nearest to  the ground can develop a skin discoloration as a result of pooling of blood in the tissues and this is called livor mortis, which tends to be permanent from 8Hours upwards.

8 0
3 years ago
Which one is a true statement about endothermic reactions?
kicyunya [14]
In a endothermic reaction energy from an outside source is continuously being added.
6 0
3 years ago
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