Instructions:Select the correct answer.

When a candle burns, which forms of energy does the chemical energy in the candle change to?

light and sound

heat and sound

light and heat

electric and light

Why does summer happen based on the location of the sun and earth

Identify the type of bond formed by sodium and chlorine.

Why are resources limited

2. Florine is a toxic, reactive gas. Which representation (structural formula, electron dot structure, or three-dimensional model) would you use to explain why fluorine so reactive? Why?

Suppose you have been given the task of distilling a mixture of hexane + toluene. Pure hexane has a refractive index of 1.375 and pure toluene has a refractive index of 1.497. You collect a distillate sample which has a refractive index of 1.441.

Compare mechanical energy and thermal energy.

How many covalent bonds can each carbon atom form?

Hich element is likely to be the most brittle? a. selenium b. cobalt c. platinum d. zinc

What units should they have used in order to make the correct conversion

The brown solid that formed is zinc copper oxygen iron