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gavmur [86]
3 years ago
8

Identifying Physical Properties of Matter

Chemistry
2 answers:
Aliun [14]3 years ago
5 0

Answer:

The particles of rock are rearranged.

The sizes and shapes of the rocks are changed.

The identities and total mass of the rocks remain the same.

A physical change is a change in some of the physical properties of matter, but not its identity.

Explanation:2020

WFH 8th Gr PhySci_20-21

Whitepunk [10]3 years ago
3 0

Answer:

When a rock gets hot it expands a little, and when it gets cold the rock contracts a little. If a rock is heated and cooled many times, cracks form and pieces of rock fall away. This type of physical weathering happens a lot in deserts, because it is very hot during the day but very cold at night.

Explanation:

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The air pressure for a certain tire is 109 kPa. What is this pressure in atmospheres?​
Len [333]

1.08 atm is the pressure for a certain tire in atmosphere.

<u>Explanation:</u>

One kilo pascal (1 kPa) corresponds to 1000 pascal. Another common unit used for pressure is atmosphere (symbolised as ‘atm’). 1 atm refers the standard atmospheric pressures and corresponds to 760 mm Hg and 101.3 kPa. Atmospheric pressures are commonly referred as square inches (psi)/ pounds.

  1 \mathrm{atm}=101.3 \mathrm{kPa}=101,325 \mathrm{Pa}=760 \mathrm{mm} \mathrm{Hg}=760 \text { torr }=14.7 \mathrm{lb} / \mathrm{in}^{2}(\mathrm{psi})

Given:

The air pressure for a certain tire = 109 kPa

We need to find pressure in atmospheres

So, we know,

1 atm = 101.3 kPa

Hence,

\frac{109 \mathrm{kPa}}{1} \times \frac{1 \mathrm{atm}}{101.3 \mathrm{kPa}}=1.076=1.08 \mathrm{atm}

1.08 atm is the pressure for a certain tire in atmosphere.

3 0
4 years ago
Explain the differences between an ionic crystal like "NaCl" (Sodium Chloride) and a metal like Fe (Iron).
lesantik [10]

Answer:

salt is weaker and has looser atomic bonds and iron has stronger and tighter ionic bonds

Explanation:

7 0
3 years ago
The specific heat of a substance which absorbs 7.5 x 10^3 J of
Veronika [31]

Answer:

9.4 x 10^-4 J/g°C

7 0
3 years ago
What is a real-life example of equilibrium and what would happen if there was a shift in the system of that example?
BabaBlast [244]

Answer:

Refrigerator

Explanation:

Think about it. Equilibrium is between 2 "places", and if you didn't open the fridge, there would be a buildup of cold air.

Because of that buildup, it would keep getting colder until it isn't possible to get cold anymore. That is equilibrium.

However, if you were to open the door for a very, very long time, you would lower the temp. inside the fridge, therefore causing for the room you are in to be slightly colder, and the fridge to decrease in cold. The fridge will still be slightly cold, but it won't be lukewarm if you leave it for 2 hours. (Unless it's broken)

That is equilibrium :)

3 0
2 years ago
Determine the name for aqueous H2CO3. carbonous acid dihydrogen carbonate carbonic acid hydrocarbonic acid hydrocarbide acid
BabaBlast [244]

The name for aqueous H_{2} CO_{3} is carbonic acid.

So, option C is correct one.

Binary hydrogen compounds with non metals may form H+ (proton) and an anion dissolved in water. The acidic solutions are named as if they were molecular acids , using the usual name for the compound itself , replacing hydrogen with hydro- and suffix -ide with ic. The word acid is then use.

The inorganic acid is an acid drive from one or more inorganic compounds. All inorganic acids form hydrogen ions and the conjugate base ions when dissolved in water.

Example: carbonic acid ( H_{2} CO_{3} )

learn more about inorganic acid

brainly.com/question/15231908

#SPJ4

4 0
2 years ago
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