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2 years ago

Four properties of water are listed.

Chemistry

2 answers:

Andrei [34K]2 years ago

6 0

Answer: 1 and 3

Explanation:

Physical properties refer to those properties of a substance that doesn't involve a chemical change or chemical reaction. They are physically observable properties of a substance. For example, we do not need any chemical reaction to observe the fact that water is odourless in its pure state. Also, we only need a thermometer and no chemical reaction to observe it's boiling point. Physical observation tells us that the liquid turns into vapour at that temperature. This is confirmed by observing the loss in volume of the liquid

kobusy [5.1K]2 years ago

4 0

Answer:

It reacts with metals to form metal hydroxide and hydrogen gas. it s an chemical property and it decomposes to H2 and O2 is also another chemical property property. because in these reaction H2O has changed to something else hence are called chemical property.

Explanation:

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Which of the following have deliquescent Nature ?

Alla [95]

Answer:

Most deliquescent substances are salts. Examples include sodium hydroxide , potassium, hydroxide, ammonium chloride, gold

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2 years ago

If an area has high air pressure and low humidity, what type of weather will it most likely have?

elixir [45]

Aloha~! My name is Zalgo and I am here to help you out today. Those sort of conditions could be fore-boding/foreshadowing/warning that there will soon be a storm or that it will rain quite a lot. In the case of it being a storm, you should be a small room where there are no windows and nothing that is small that will fly towards you that could kill you.

I hope that this helps! :D

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3 years ago

Read 2 more answers

What is the volume in liters of hydrogen gas that would be produced by the reaction of 40.0 g of Al with excess HCl at STP accor

DaniilM [7]

The volume in liters of Hydrogen gas = 49.28 L

<h3>Further explanation </h3>

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products

Reaction

2 Al (s) + 6 HCl (aq) → 2 AlCl₃ (aq) + 3 H₂ (g)

mol Al :

$\tt mol=\dfrac{mass}{Ar}=\dfrac{40}{27}=1.481$

mol H₂ :

$\tt \dfrac{3}{2}\times 1.481=2.2$

At STP, 1 mol =22.4 L

so the volume of hydrogen :

$\tt 2.2 \times 22.4=49.28~L$

8 0

2 years ago

Read 2 more answers

The Aurora Borealis or northern light occur when solar flares react with the atmosphere near the north poles. The Aurora give of

scoray [572]

Answer: <span>C) plasma
</span><span>
Natural phenomena characterized by colored lights in the sky, is caused by the interaction of charged particles of energy from the solar wind with the magnetic layer of the earth so we have turbulence and multicolored plasma clouds known as auroras arise.</span>

4 0

3 years ago

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The weight of a sack potato in india is 50kgf. will the weight increase or decrease in bhutan. why

AfilCa [17]

Answer:

Assume that the sack was initially close to the sea level. Its weight will increase even though its mass stays the same.

Explanation:

The weight of an object typically refers to the size of the planet's gravitational attraction (a force) on this object. That's not the same as the mass of the object. The weight of an object at a position depends on the size of the gravitational field there; on the other hand, the mass of the object is supposed to be same regardless of the location- as long as the object stays intact.

Let $g$ denote the strength of the gravitational field at a certain point. If the mass of an object is $m$ , its weight at that point will be $m \cdot g$ .

Indeed, $g \approx 9.81\; \rm N \cdot kg^{-1}$ on many places of the earth. However, this value is accurate only near the sea level. The equation for universal gravitation is a more general way for finding the strength of the gravitational field at an arbitrary height. Let $G$ denote the constant of universal gravitation, and let $M$ denote the mass of the earth. At a distance $r$ from the center of the earth (where

$\displaystyle g \approx \frac{G \cdot M}{r^2}$ .

The elevation of many places in Bhutan are significantly higher than that of many places in India. Therefore, a sack of potato in Bhutan will likely be further away from the center of the earth (larger $r$ ) compared to a sack of potato in India.

Note, that in the approximation, the value of $g$ is (approximately, because the earth isn't perfectly spherical) inversely proportional to the distance from the center of the planet. The gravitational field strength

On the other hand, the weight of an object of fixed mass is proportional to the gravitational field strength. Therefore, the same bag of potatoes will have a smaller weight at most places in Bhutan compared to most places in India.

6 0

2 years ago