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Gnesinka [82]
3 years ago
5

A volcanologist noted that a lahar rushed down a mountain at 32.2 kilometers per hour, south. How far did

Chemistry
1 answer:
GuDViN [60]3 years ago
5 0

Answer:

Distance = 9.40 Km

Explanation:

Given data:

Velocity = 32.2 Km/hr

Time = 17.5 min

Distance = ?

Solution:

17.5 /60 =0.292 hr

Formula:

Velocity = distance / time

Distance = velocity× time

Distance = 32.2 Km/hr ×0.292 hr

Distance = 9.40 Km

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helium gas in a 2.00 L cylinder is under 1.12 atm pressure. At 36.5°C that same gas sample has a pressure of 2.56 atm. What was
Irina18 [472]

Answer:

T₁ = 135.41 K

Explanation:

Given data:

Initial pressure = 1.12 atm

Finial temperature = 36.5 °C (36.5 +273 = 309.5 K)

Initial temperature = ?

Final pressure = 2.56 atm

Formula:  

P₁/T₁ = P₂/T₂  

P₁ = Initial pressure

T₁ = Initial temperature

P₂ = Final pressure

T₂ = Final temperature

Solution:

P₁/T₁ = P₂/T₂  

T₁  = P₁T₂  /P₂

T₁ = 1.12 atm × 309.5 K / 2.56 atm

T₁ = 346.64 atm . K / 2.56 atm

T₁ = 135.41 K

5 0
3 years ago
Which statements describe lattice energy?
gtnhenbr [62]
Answer:

It is the energy the ions absorb when they form a crystalline compound.


Explanation:

Lattice energy is the energy released upon the formation of a crystal lattice structure.
5 0
3 years ago
Why are chemical equations balanced?​
Inessa05 [86]

Answer:

Chemical equations need to be balanced so that they follow the law of conservation of mass.

3 0
4 years ago
How and why do ionic bonds form?
babymother [125]
Ionic bonds are formed when one of the two atoms that are reacting has excess electrons and transfer the electrons to the atom that is deficient in electrons. During the formation of the ionic bond, one of the reacting atoms will donate electrons and form positive ion.
7 0
3 years ago
Please help
aev [14]

Answer:

Copper(II) sulphate – sodium hydroxide reaction

The reaction between copper(Il) sulphate and sodium hydroxide solutions is a good place to start. If you slowly add one to the other while stirring, you will get a precipitate of copper(II) hydroxide, Cu(OH)2.

5 0
3 years ago
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