How much heat is required to increase the temperature of 198.5 grams of water from 25.0 degrees Celsius

1. Which is not an example of a physical change to a wooden stick? A) slicing wood shavings from the stick B) bending the stick back and forth C) burning the stick D) chopping the stick in half

A compound that is completely dry or "water - free" is called

How does a catalyst increase the rate of a reaction? A) It decreases the enthalpy change of the reaction. B) It lowers the potential energy of the reactants. C) It provides a lower activation energy for the reaction.

Imagine that one carbon in buckminsterfullerene (C60) is replaced by a silicon atom, yielding SiC59. This molecule can then orient in 60 different ways. What is the entropy of one mole of SiC59 at T = 0 K?

Explain Redox tiltration and examples of half - life reactions.

How many grams of NaOH are needed to make 500 mL of a 2.5 M NaOH solution

During its life cycle, an amphibian lives both on land and in water.

An atom that contains 22 protons, 23 neutrons, and 22 electrons would have a mass of approximately

Compared with a ph of 7, a solution of ph 5 has what times/fraction of the hydrogen concentration?

Write a formulae equation to represent the combustion of carbon to form carbon dioxide and the thermal decomposition of magnesium carbonate