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prohojiy [21]
2 years ago
7

A dog has greater mass as an adult than she did as a puppy. Has matter been created? Why or why not?

Chemistry
2 answers:
Rina8888 [55]2 years ago
6 0
Yes i think bc it makes sense
Lapatulllka [165]2 years ago
5 0
The puppy grew so it increased in mass :3
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kodGreya [7K]

The car's velocity after 5s : 10 m/s

<h3>Further explanation</h3>

Given

velocity=v=72 km/h=20 m/s

time=t = 5 s

acceleration=a = -2 m/s²

Required

velocity after 5s

Solution

Straight motion changes with constant acceleration

\tt v_f=v_i+at

vf=final velocity

vi = initial velocity

Input the value :

\tt v_f=20+(-2).5\\\\v_f=20-10\\\\v_f=10~m/s

The car is decelerating (acceleration is negative) so that its speed decreases

4 0
3 years ago
The volume of a given mass of agas is 360cm cubic at 50 degrees and 700 milimetres Hg .find it's volume at s.t.p​
saveliy_v [14]

Answer:

V₂  =279.9 cm³

Explanation:

Given data:

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Initial temperature = 50°C

Initial pressure = 700 mmHg

Final volume = ?

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Final pressure = 1 atm

Solution:

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Solution:

<em>We will convert the mmHg to atm.</em>

700/760 = 0.92 atm

<em>and °C to kelvin.</em>

50+273 = 323 K

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V₂ = P₁V₁ T₂/ T₁ P₂

V₂ = 0.92 atm × 360 cm³ × 273 K / 323 K ×1 atm

V₂  =  290417.6 atm .cm³.  K  / 323 k. atm

V₂  =279.9 cm³

8 0
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exis [7]

Answer:

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Explanation:

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3 years ago
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Masteriza [31]

Answer: C2H2

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5 0
3 years ago
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Physical changes occur when matter changes its property but not its
NNADVOKAT [17]
This statement is true
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