What are example of dense things.

Adam found a block made of lead, the density of lead is 11.36 g/cm 3. The lengths of the blocks sides are 5 cm, 1.5 cm, and 3 cm, respectively. How heavy is adams block

Taking small items, such as loaves of bread or extra kitchen utensils, won't have any effect in the workplace. A) True B) False

One atom of iron contains 26 protons, 30 neutrons, and 26 electrons. Which of the following would be possible for another atom of iron?

The strongest light left over from the big bang is called background radiation and was given off as which type of wave? A. Radio waves B. Visible light C. Microwaves D. Gamma rays

Which monatomic ions would you expect radium (z = 88) and selenium (z = 34) to form?

How do rockets work? What chemicals are used and what reactions happens with those chemicals to make a rocket fly?

The solubility of iron (ii) hydroxide, fe (oh) 2, is 1.43x10-3 gram per liter at 25oc. a. write a balanced equation for the solubility equilibrium

A substance undergoes change. Which Of the following indicates that the change was a chemical change? a. the substance changed state. b. the molecules of the substance changed c. the substance changed shape. d. the density of the substance changed.

What is DNA? What information does it carry? Where is DNA located?

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O What mass of CH4 is required to completely react with 100 grams of O2?