Help please C2H4O2

1. How many different atoms are in the compound above?

2. How many atoms of hydrogen?

3. How many total atoms are in this compound?

4. If a big 2 were added in front of the formula, what would that mean?

1. There are three different atoms

2. There are 4 hydrogen

3. There are 8 atoms in the compound

4. All the atoms are double the number

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

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