Which sentence describes a tropical rainforest?

A. it is mostly composed of deciduous trees

B. it has a dry period

C. it contains few animal species

D. it is always wet

You are a forensic scientist working for a police department. One piece of evidence from your current case is a letter written in a strange ink. You must separate the pigments in the ink to determine what it is made from.

Question 1 a sample of 0.255 mole of gas has a volume of 748 ml at 28°c. calculate the pressure of this gas. (r = 0.0821 l ∙ atm / mol ∙ k) 0.784 atm 8.42 atm 0.00842 atm 7.84 * 10-4 atm none of the above

Define chemical property list two examples of chemical propertjes

What is one major difference between volcanic activity on Earth and volcanic activity on Mars, Venus, and the moon? Explain.

Which represents the ionization of a strong eletrolyte

A laboratory experiment requires 250 millimeters of water for boiling. It also requires 100 millimeters of water for a cooling process.

Which set of procedures and observations indicates a chemical change? A) Ethanol is added to an empty beaker and the ethanol eventually disappears. B) A solid is gently heated in a crucible and the solid slowly turns to liquid.

If 100 grams citric acid react with 100 g baking soda how many grams of carbon dioxide?

What state of matter undergoes changes in volume most easily? a. solidb. liquidc. gasd. frozen

What was the result of the atomic theory?