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Nastasia [14]
3 years ago
6

Explain why the statement “The speed of light is 300 million m/s” is not always correct.

Chemistry
1 answer:
levacccp [35]3 years ago
5 0

Because the speed of light is determined by the medium that is it in. If light is in a vacuum it goes 300 million meters per second but it is slower in air, and even slower in water because water is more dense than the previous two.

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Which of the following is a precipitation reaction?
erik [133]

Answer:

The precipitated are option a and d.

Explanation:

2 LiI(aq) +Hg2(NO3)2(aq)  →  Hg2I2(s) ↓ + 2 LiNO3(aq)

Cation Hg2+ 2 in the presence of iodide,  a precipitated  is formed.

Zn(s) + 2AgNO3(aq) → 2 Ag(s) ↓ +Zn(NO3)2(aq)

Zinc starts to get rid, and some white particles also stick to it. Afterwards the solution becomes cloudy and a precipitate appears, which is the solid silver

3 0
3 years ago
I need helpppp plsss
dedylja [7]

Answer:

Blank 1 - 2

Blank 2 - 4

Blank 3 - 3

Explanation:

The unbalanced chemical equation given in the question is as follows:

Au2O3 → Au + O2

To balance a chemical equation, the number of atoms of each element on both sides of the equation (reactants and product) must be the same. Based on this explanation, the balanced chemical equation is as follows:

2Au2O3 → 4Au + 3O2

- 4 atoms of gold (Au) on both sides

- 6 atoms of oxygen on both sides

Hence, based on the question, blank 1, 2 and 3 are 2, 4 and 3 respectively.

8 0
3 years ago
Using the information in the table to the right, calculate the enthalpy of combustion of 1 mole of acetylene for the reaction
barxatty [35]

The enthalpy of combustion of 1 mole of acetylene for the reaction using the information in the table (attached as figure) is - 1,256 kJ/mol

<h3>What is Enthalpy of combustion ?</h3>

The enthalpy of combustion of a substance is defined as the heat energy given out when one mole of a substance burns completely in oxygen.

Hence, The enthalpy of combustion of 1 mole of acetylene for the reaction using the information in the table is - 1,256 kJ/mol

Learn more about Enthalpy here ;

brainly.com/question/16720480

#SPJ1

8 0
2 years ago
A rate of change is it velocity or acceleration .​
Lorico [155]

Answer:

Acceleration is the correct answer. Hope this helps!

Explanation:

3 0
3 years ago
You have a solution of koolaid, and when you add more sugar to it, it dissolves fairly easily. What type of solution was the ori
Amanda [17]

Answer:

Flavored Sugar

Explanation:

8 0
4 years ago
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