Liquid nitrogen is very cold. At room tempature it changes into a gas. This is an example of:

A) Evaporation

B) Sublimation

C) Melting

D) Boling

(Its not answer b)

The specific heat of aluminum is 0.90 J/g·°C. How much energy is required to raise the temperature of 10 grams of aluminum from 10°C to 20°C?

Explain how a cell is like your school or town. What is the nucleus of your town? The mitochondria?

What mass of calcium chloride will be produced from 4.09 g of hcl reacting with ca (oh) 2

How many chlorine (ci) atoms would be in 4 molecule of salt (4naci)

What change takes place when a liquid absorbs heat energy without increasing its temperature? A. the pressure increases B. it vaporizes C. it solidifies D. the volume decreases

Part II. Formulas From Names Write the chemical formula of the covalent compounds below. 11. Carbon dioxide CO2

Spell out the full name of the compound Cl2O7

True or False. When covalent bonds are formed between atoms having different electronegativities, the electrons tend to spend less time at the atom with the greater electronegativity. Such chemical bonds are called polar covalent bonds.

How many protons are in an element

Which of the following is an example of oxidation? A. Charcoal is placed on a grill and lighting fluid poured over it. B. A car gets rusty over the course of a few years. C.