This symbol ⇔ indicates: question 2 options: that heat must be applied. that the reaction is reversible. that a gas is formed by the reaction. an incomplete combustion reaction.

The accepted ΔH for a reaction is - 42.3 kJ/mol. A student has performed a lab experiment to determine the enthalpy change of the same reaction. Calculate the percent error Student 1 Exp. ΔH (kJ/mol) Trial 1 - 43.8 Trial 2 - 41.0 Trial 3 - 42.7

Different types of atoms or molecules that are mixed together are called?

How many atoms are in 2.5 moles of silver

Which of the following combinations of information would allow you to calculate concentration in ppmv? Check all that apply.

Determine the number of significant figures in 420.0

Part 2: Finding Speed and Height Using Energy Directions: Use the KE and GPE equations to solve for speed or height depending on the situation. 1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed? 2.

Why is conductivity be the best test to find a metal, non-metal or metalloid?

In which way does a na1 + ion differ from a neutral na atom?

Which would not be associated with stable atmospheric conditions afternoon thunder showers is the answer

Which is not a characteristic of a compound? It is a mixture of elements. It has properties that differ from its component elements. It has a fixed proportion of elements.