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Anna35 [415]
3 years ago
5

Kamir and Alexis are studying the properties of water. They conducted a variety of experiments to determine its physical and che

mical properties. Of the tests the students conducted, which one illustrates a chemical property of water?
A) Salt dissolves in water.
B) Oil and water do not mix.
C) Pencil shavings float on water and do not dissolve.
D) Neutral water react s with carbon dioxide to form an acid solution.
Physics
2 answers:
Mice21 [21]3 years ago
5 0

Answer: D) Neutral water react s with carbon dioxide to form an acid solution.

Explanation: A physical property is defined as the property in which a change in shape, size takes place. No new substance gets formed while measuring physical properties.

Example: A) Salt dissolves in water.  

B) Oil and water do not mix.  

C) Pencil shavings float on water and do not dissolve.

A chemical property is defined as the property in which a change in chemical composition takes place. A new substance is formed while measuring chemical properties.

Example: D) Neutral water react s with carbon dioxide to form an acid solution.

CO_2+H_2O\rightarrow H_2CO_3

solniwko [45]3 years ago
4 0

The answer is D) neutral water reacts with carbon dioxide to form an acid solution

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Answer: C solar energy

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Explanation:

Primary productivity  is the amount of organic compounds synthesized from carbon dioxide. Primary production occurs by the process of photosynthesis. Since the process of photosynthesis uses sunlight as the energy source solar energy has the greatest impact on primary productivity.

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Estimate the volume of a piece of molecular cloud that has the same amount of water as your body.
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Question:

The water molecules now in your body were once part of a molecular cloud. Only about onemillionth of the mass of a molecular cloud is in the form of water molecules, and the mass density of such a cloud is roughly 2.0×10−21 g/cm^3.

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Answer:

The volume of cloud that has the same density as the amount of water in our body is 1.4×10²⁵ cm³

Explanation:

Here, we have mass density of cloud  =  2.0×10⁻²¹ g/cm^3

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A car accelerates from 4 meters/second to 16 meters/second in 4 seconds. The car’s acceleration is __meters/second2.
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1\ J=\frac{1}{1.6\times 10^{-19}}\ eV

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