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Andre45 [30]
3 years ago
14

In the early studies of chemistry, scientists used properties and changed to help identify compounds. this is still done today.

if you were given the following observation about salt water, how would you classify it? "when electricity flows through a flask of salt water, bubbles form in the water. these bubbles, when collected, will burn."
Chemistry
1 answer:
aalyn [17]3 years ago
4 0

Answer:

as an inflammable substance

Explanation:

Because when it reacts with electricity and water start to produce bubbles, and these bubbles burn, that mean is a substance flammable.

Now a days it is needed to have more test to identify a substance and to classify not just by the physical properties, also by the chemical properties and even  more, by the chemical behavior in front of other substances.

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What volume of air at 25°C and 1.00 atm can he stored in a 10.0 L high-pressure air tank if compressed to 25°C and 175 atm?
DaniilM [7]

Answer:

1750L

Explanation:

Given

Initial Temperature = 25°C

Initial Pressure = 175 atm

Initial Volume = 10.0L

Final Temperature = 25°C

Final Pressure = 1 atm

Final Volume = ?

This question is an illustration of ideal gas law.

From the given parameters, the initial temperature and final temperature are the same; this implies that the system has a constant temperature.

As such, we'll make use of Boyle's Law to solve this;

Boyle's Law States that:

P₁V₁ = P₂V₂

Where P₁ and P₂ represent Initial and Final Pressure, respectively

While V₁ and V₂ represent Initial and final volume

The equation becomes

175 atm * 10L = 1 atm * V₂

1750 atm L = 1 atm * V₂

1750 L = V₂

Hence, the final volume that can be stored is 1750L

5 0
2 years ago
How many atoms it would take to make up the thickness of a banknote.
natita [175]

Answer:

Since one banknote has a thickness of about 0.1 millimeters, if all the banknotes produced in a year were stacked up, they would reach a height of approximately 300 kilometers, which is about 80 times the height of Mount Fuji.

4 0
3 years ago
Why do northern lights appear in different colors? Because charged particles of solar wind ignite different gases in Earth's atm
Fofino [41]

Answer:

It is A. Because charged particles of solar wind ignite different gases in Earth's atmosphere.

Explanation:

Since the solar wind from the sun is too radioactive for humans (they would die), once the charged particles hit the earth's atmosphere it shows its color. Every element has its own color and once it hits the atmosphere it really starts to show.

6 0
2 years ago
Wuy Piolcululugu<br> Give the names of two organs in the chest.<br> 1. ...............<br> 2 m
Arada [10]

Answer:

The organs present inside the chest are :

1. The lungs

2. The heart

Explanation:

The chest cavity is also called as the thoracic cavity. It is the second largest hollow space of the body.In the bottom , it is enclosed by the diaphragm.

This cavity actually contain three space each round with mesothelium , pleural cavity and precardial cavity.

This contain the lungs , the tracheobronchial tree , the heart , the blood vessels which transport the blood between the heart and the lungs.

It also contain the esophagus .

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8 0
3 years ago
What is it called when a substance changes from a vapor to a liquid
skad [1K]
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4 0
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