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3 years ago

LC Chemistry I v18 (GS) / Module 01: Matter

Chemistry

1 answer:

daser333 [38]3 years ago

3 0

Answer:

Burning Paper

Explanation:

Burning Paper is an example of a chemical change because;

- A new substance called ''Ash'' is formed.

- It is an irreversible reaction.

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As the temperature of a liquid increases, the solubility of a gas in the liquid

RoseWind [281]

The correct answer is B. Solubility describes the amount of solute that can be dissolved in a solvent. This value is not constant is affected by many factors. One factor is the temperature. An increase in temperature, a corresponding change in solubility also can be observed. The increase leads to a decrease in the solubility and the opposite. A decrease is observed since gas molecules are now has enough energy to escape the liquid phase and go to the gas phase.

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3 years ago

Luba_88 [7]

Answer:

yes u are correct as it define that

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3 years ago

After 62.0 min, 33.0% of a compound has decomposed. What is the half-life of this reaction assuming first-order kinetics?

nikdorinn [45]

Half life is determined using the equation expressed as:

A = Ao e^-kt

First, we need to find for the value k.

A = .67Ao = Ao e^-k(33 min)
k = 0.0121

The half-life is then calculated as follows:
A = .5Ao = Ao e^-0.0121(t)
t = 57.28 min

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4 years ago

In the compound AbO3, the ratio of aluminum to oxygen is

jasenka [17]

The compound is Al2O3. The ratio of aluminum to oxygen is 2:3.

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3 years ago

The green light emitted by a stoplight has a wavelength of 525 nm. What is the frequency of this photon? (c = 3.00 × 10⁸ m/s).

Reil [10]

The frequency of this photon is 5.94 x $10^{14} H_{Z}$ .

Solution:

The speed of light has a value of approximately 3.00×108 m/s

The wavelength should have units of meters.

The frequency should have units of Hz or s−1. Hz is hertz or reciprocal seconds.

We know the value of the speed of light and we are given the wavelength. All we have to do is rearrange the equation to solve for the frequency:

v = c/λ

= 3.00× $10^{8}$ m/s/505× $10^{-9}$ m

= 5.94X $10^{14}$ s-1

= 5.94X $10^{14}$ Hz

Frequency describes the number of waves passing through a particular location at a particular time. A class interval frequency is the number of observations that occur in a particular predefined interval. So, for example, if 20 of her ages 5-9 appear in the survey's data, the interval 5-9 has a frequency of 20. The class interval endpoints are the lowest and highest possible values of the variable.

Learn more about The frequency here:- brainly.com/question/254161

#SPJ1

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1 year ago