ChemCom - Topic #2 and 3

What is the dependent variable?

• power generated

• large white fan

• distance to the fan

• cell phone

Using the data and set-up below, how long would it take to charge a cell phone at 10 cm?

• 583 hrs

• 420 hrs

• 340 hrs

• 124 hrs

The diagram would be classified as a __ reaction that takes place at ___.

• fusion - a reactor

• fission - the sun

• fusion - the sun

• fission - a reactor

The reaction below would be classified as a ___ taking place in ___.

• fusion - a reactor

• fission - the sun

• fusion - the sun

• fission - a reactor

magnesium-24 is different from an atom of magnesium-25 because of the number __.

• protons

• electrons

• neutrons

• rings

How many atoms of oxygen are present in the following reaction?

• 3

• 2

• 6

• 1

When copper and zinc are used in the battery system, which element gains electrons?

• copper

• zinc

• both

• neither

What is the formula for the particles in Box C.

• 2B₄

• 4BW

• 2B₂ + 2W₂

Box A contains

• elements

• compounds

• both

Which box or boxes represent PRODUCTS?

• i only

• ii only

• i and iii

• ii and iv