A 2.56g sample of anthracene C14H10, was burned to heat an aluminum calorimeter (mass = 948 g). The calorimeter contained 1.50 L of water with an initial temperature of 20.5oC and a final temperature of 34.3oC.

Which indicator most likely suggests that a chemical change is taking place? 1) change in size 2) change of color 3) change of state 4) change in shape

1. What is the mass of 25.0 L of neon at STP?

How does a prokaryotic cell know how to reproduce? A The instructions necessary are found in the nucleoid. B A hormone is released that prompts a mature cell to mate. C An enzyme reacts with the cytoplasm to create two cells from one.

Blank is the theory that explains how large pieces of earths outermost layer move and change shape

The brain is composed of many cells and different tissue at what level of organizationcis the brain?

Why did most scientists reject Wegner's theory for nearly a half century?

Define prediction and explain how it is used to formulate a hypothesis.

A group of organisms that breed and produce offspring that can breed. A. Species B. ecosystem C. Biodiversity

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of water? 0.22 m 72 m 7200 m 40 m

A battery is constructed based on the oxidation of magnesium and the reduction of cu2+. the initial concentrations of mg2 + and cu2 + are 1.2*10-4 m and 1.44 m, respectively, in 1.0-liter half-cells. how long can the battery deliver 5.