What's the definition of fossil

beryllium has four protons in its nucleus. How many neutrons are in beryllium-9? Explain how you calculated your answer

Which of the following is a characteristic of most non-metals

The specific heat of a certain type of metal is 0.128j / (g. c). What is the final temperature if 305. J of heat is added to 72.7g of the metal initially at 20.0°C?

Many kinds of animals eat blackberries. Which of the following will most likely happen to the seeds of a blackberry plant after the fruit is eaten by an animal?

What is the density of an object with mass 150 and volume 30

Cecil writes the equation for the reaction of hydrogen and oxygen below. H2 + O2 → H2O Why does his teacher ask him to balance the equation by including the correct coefficients? A. to show that most molecules exist in pairs B.

Which type of reaction occurs when you bake a tray of cookies?

How can you separate a mixture containing two different liquids? filtration evaporation distillation magnetic attraction

What is the hydrogen ion concentration [H+] in a 3.76 x 10^-2 M solution of nitric acid (HNO3)

The condensation temperature of a material is the temperature at which the material makes a transition between being a vapor and being a solid. Three of the most important materials in the early solar nebula were water vapor, iron, and hydrogen.