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krek1111 [17]
3 years ago
14

Which of these chemical equations demonstrates the law of conservation of mass as it applies to the combustion of ethane? A. 2 C

2 H 6 + 7 O 2 → 4 C O 2 + 6 H 2 O B. C 2 H 6 + 3 O 2 → 2 C O 2 + 3 H 2 O C. C 2 H 6 + 5 O 2 → 2 C O 2 + 3 H 2 O D. 2 C 2 H 6 + 5 O 2 → 4 C O 2 + 4 H 2 O
Physics
1 answer:
WINSTONCH [101]3 years ago
3 0

A. 2 C₂ H₆ + 7 O₂ → 4 C O₂ + 6 H₂ O


according to law of conservation of mass , the total mass of reactants side must be same as the total mass of product side. so we need to check if each atom in the equation has same number on both side of the equation or not.

in this equation , we have

4 atoms of carbon left and 4 atoms of carbon on right

12 atoms of hydrogen on left and 12 atoms of hydrogen on right

14 atoms of oxygen on left and 14 atoms of oxygen on right

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A space station consists of three modules, connected to form an equilateral triangle of side length 82.0 m. Suppose 100 people,
CaHeK987 [17]

Answer:

Angular momentum of the system is 16221465.4617 kgm²/s

Explanation:

Given that;

length of the side of the triangle L =  82 M

m = 75.0 kg × 100 = 7500 kg

distance of each vertex from center R = L/√3 = 82/√3 = 47.34 m

effective acceleration a = 9.8 / 2 = 4.9 m/s²

we know that; effective acceleration is being provided by centripetal acceleration.

so

a = R × w²

rate of rotation w = √( a / R) = √( 4.9 / 47.34)  = 0.3217 rad/seconds

Moment of Inertia I = 3mR²

we substitute

I = 3 × 7500 × (47.34)²

Also, Angular momentum L is expressed as;

L = I × w

so

L = 3 × 7500 × (47.34)² × 0.3217

L =  16221465.4617 kgm²/s

Therefore, Angular momentum of the system is 16221465.4617 kgm²/s

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2 years ago
Which two factors does the power of a machine depend on
azamat
Power in physics terms depends on both work and time because of the equation P=W/T

Hope this helps :D

8 0
3 years ago
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Verizon [17]

Answer: Protons are positively charged particles

Explanation:

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Which statement is the best interpretation of the ray diagram shown below?
madreJ [45]

A) A concave mirror forming a larger, virtual image

Explanation:

The figure is missing; see attachment.

There are two types of mirror:

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The image formed by a mirror can also be of two types:

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In the figure of this problem (see attachment), we see that:

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- The image is formed on the other side of the mirror --> it is a virtual image

So the correct option is

A) A concave mirror forming a larger, virtual image

Learn more about mirrors:

brainly.com/question/8737441

#LearnwithBrainly

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3 years ago
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