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3 years ago

What makes ice cubes melt

Chemistry

2 answers:

prohojiy [21]3 years ago

8 0

Heat or the sun. Because it is so hot that it melts things.

Anton [14]3 years ago

8 0

Well...warmth lol. But when ice cubes melt, the atoms are going farther part. The bonds are breaking which makes it an endothermic reaction. It is also a phase change. :)

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Butanal and butanone have different chemical and physical properties primarily because of differences in their

Simora [160]

Answer: (1) functional groups

Explanation:

Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.

The compounds having similar molecular formula but different arrangement of atoms or groups in space are called isomers and the phenomenon is called as isomerism.

Butanal is $CH_3CH_2CH_2CHO$ and butanone is $CH_3CH_2COCH_3$ .

$CH_3CH_2CH_2CHO$ and $CH_3CH_2COCH_3$ are functional isomers which have same molecular formula , similar masses and same number of carbon atoms per molecule but different functional groups attached.

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3 years ago

describe how these nutrients and elements such as carbon, oxygen, and nitrogen are cycled through ecosystems.

Diano4ka-milaya [45]

Answer:

Carbon Cycle

Steps of the Carbon Cycle

CO2 is removed from the atmosphere by photosynthetic organisms (plants, cyanobacteria, etc.) and used to generate organic molecules and build biological mass.

Animals consume the photosynthetic organisms and acquire the carbon stored within the producers.

CO2 is returned to the atmosphere via respiration in all living organisms.

Decomposers break down dead and decaying organic matter and release CO2.

Some CO2 is returned to the atmosphere via the burning of organic matter (forest fires).

CO2 trapped in rock or fossil fuels can be returned to the atmosphere via erosion, volcanic eruptions, or fossil fuel combustion.

Nitrogen Cycle

Steps of the Nitrogen Cycle

Atmospheric nitrogen (N2) is converted to ammonia (NH3) by nitrogen-fixing bacteria in aquatic and soil environments. These organisms use nitrogen to synthesize the biological molecules they need to survive.

NH3 is subsequently converted to nitrite and nitrate by bacteria known as nitrifying bacteria.

Plants obtain nitrogen from the soil by absorbing ammonium (NH4-) and nitrate through their roots. Nitrate and ammonium are used to produce organic compounds.

Nitrogen in its organic form is obtained by animals when they consume plants or animals.

Decomposers return NH3 to the soil by decomposing solid waste and dead or decaying matter.

Nitrifying bacteria convert NH3 to nitrite and nitrate.

Denitrifying bacteria convert nitrite and nitrate to N2, releasing N2 back into the atmosphere.

Oxygen Cycle

Oxygen is an element that is essential to biological organisms. The vast majority of atmospheric oxygen (O2) is derived from photosynthesis. Plants and other photosynthetic organisms use CO2, water, and light energy to produce glucose and O2. Glucose is used to synthesize organic molecules, while O2 is released into the atmosphere. Oxygen is removed from the atmosphere through decomposition processes and respiration in living organisms.

Explanation:

6 0

3 years ago

What is copper sulfate?

Archy [21]

Copper sulfate is an inorganic compound that combines sulfur with copper. It can kill bacteria, algae, roots, plants, snails, and fungi. The toxicity of copper sulfate depends on the copper content. Copper is an essential mineral.

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3 years ago

Consider the following chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its

TiliK225 [7]

The addition of hydrogen carbonate to bromothymol blue turns the solution blue. Thus, option B is correct.

The balanced equation for the dissociation of bromothymol blue is:

$\rm HC_2H_3O_2\;\leftrightharpoons H^+\;+\;C_2H_3O_2^-$

The color of dissociated form is yellow and undissociated form is blue.

<h3>What is the final color of solution?</h3>

The addition of hydrogen carbonate results in the dissociated ions as:

$\rm H_2CO_3\;\rightarrow\;2\;H^+\;+\;CO_3^-$

The dissociation results in the increased hydrogen ion concentration. The undissociated form in the reaction mixture increases.

Thus, the color of the solution will turn blue. Hence, option B is correct.

Learn more about bromothymol blue, here:

brainly.com/question/24319054

6 0

3 years ago

Sound travels faster through solids than it does through either liquids or gases a student could verify this statement by

irina [24]

Group of answer choices.

A. Distance that sound travels through a solid, a liquid, and a gas.

B. Pitch of sound when it passes through a solid, a liquid, and a gas.

C. Distance sound travels through a solid, a liquid, and a gas at varying temperatures.

D. Time required for sound to travel a set distance through a solid, a liquid, and a gas.

Answer:

D. Time required for sound to travel a set distance through a solid, a liquid, and a gas.

Explanation:

Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.

Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.

Mathematically, the time required for sound to travel is given by this formula;

$Time = \frac {distance (x)}{speed (v)}$

Hence, the time taken for sound to travel through each medium (solid, liquid and gas) would be measured, recorded and compared to one another.

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3 years ago