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sukhopar [10]
3 years ago
8

Changes in which two characteristics can indicate a physical change?

Chemistry
2 answers:
liberstina [14]3 years ago
6 0

Answer:

A-Shape

C-state

Explanation:

reactivity and flammability are both indicators of chemicals changes

noname [10]3 years ago
5 0

Answer:

A. and C.

Explanation:

A P E X

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Robert

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There is not more than one colour

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Which of the following is an action-at-a-distance force? friction tension gravity air resistance
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Action-at-a-Distance Forces. Frictional Force. Gravitational Force. Tension Force ... The force of gravity on earth is always equal to the weight of the object as ... The friction force is the force exerted by a surface as an object moves across it or ... The force of air resistance is often observed to oppose the motion of an object.

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Explain how storm surges can affect human life in Florida.
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When testing for hydrogen gas in the laboratory a glowing splint is inserted into the gas which results in a pop sound. What is
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5 0
3 years ago
Can someone help?? This is really hard.
Sergeu [11.5K]

Answer:

See Explanation

Explanation:

Let us consider the first two reactions, the initial concentration of CO was held constant and the concentration of Hbn was doubled.

2.68 * 10^-3/1.34 * 10^-3 = 6.24 * 10^-4/3.12 * 10^-4

2^1 = 2^1

The rate of reaction is first order with respect to Hbn

Let us consider the third and fourth reactions. The concentration of Hbn is held constant and that of CO was tripled.

1.5 * 10^-3/5 * 10^-4 = 1.872 * 10^-3/6.24 * 10^-4

3^1 = 3^1

The reaction is also first order with respect to CO

b) The overall order of reaction is 1 + 1=2

c) The rate equation is;

Rate = k [CO] [Hbn]

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k = 3.12 * 10^-4  /[5 * 10^-4] [1.34 * 10^-3]

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2) The sum of the order of reaction of each specie in the rate law gives the overall order of reaction.

8 0
3 years ago
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