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FromTheMoon [43]
4 years ago
11

Tim’s father bought a bicycle for Tim. To avoid head injury during a crash, his father also bought a child-size helmet. The helm

et should have a _______
sticker inside it.
Chemistry
1 answer:
VARVARA [1.3K]4 years ago
8 0
There will be a CPSC sticker
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Reaction rate is increased by an increase in kinetic energy
marta [7]

Answer:

Reaction rate is increased by an increase in kinetic energy

of the reacting particles when their

is _temperature_

increased

A . Collision theory

B . Surface Area

C . Temperature

D. Concentration

8 0
2 years ago
Need help on last 3 questions
Olin [163]

Answer:

Explanation:

1)

Given data:

Initial volume of balloon = 0.8 L

Initial temperature = 12°C ( 12+273= 285 K)

Final temperature = 300°C (300+273 = 573 K)

Final volume = ?

Solution:

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 0.8 L .573 K / 285 K

V₂ = 458.4 L / 285

V₂ = 1.61 L

2)

Initial pressure = 204 kpa

Initial temperature = 29°C ( 29 + 273 = 302 K)

Final temperature = ?

Final pressure = 300 kpa

Solution:

P₁/T₁ = P₂/T₂

T₂ = T₁P₂/P₁  

T₂ = 302 K . 300 kpa / 204 kpa

T₂ = 90600 K/ 204

T₂ = 444.12 K

3)

Given data:

Initial volume = 14 L

Initial pressure = 2.1 atm

Initial temperature = 100 K

Final temperature = 450 K

Final volume = ?

Final pressure = 1.2 atm

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 2.1 atm × 14 L × 450 K / 100 K × 1.2 atm  

V₂ = 13230 L / 120

V₂ = 110.25 L

5 0
3 years ago
_____ chemical reactions need a certain amount of activation energy to get started.
Anettt [7]

Answer:all

Explanation:

Because a reaction does not starts by itself unless some force is applied

3 0
3 years ago
Describe the importance of the water cycle in the terms of;
nikitadnepr [17]

Answer:

ii.

Explanation:

Regulating weather patterns

3 0
2 years ago
Which of the following gases would be most likely to experience ideal behavior at high pressures?
Delvig [45]
D, <span>Monotonic gases, which have no inter molecular attractions are most suited as ideal gases </span><span />
4 0
3 years ago
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