What is the molar mass of H2 write your answer in scientific notation with four digits

Consider the reaction: C + O2 rightwards arrow CO2 + 393 kJ. When 2 mol of carbon react

The location of an object

1. How does the amount of energy in the batteries in a flashlight compare to the total amount of energy given off by the flashlight as light and heat? 2. What are two ways the rate of a chemical reaction can be changed? 3.

What is the proper name for the following compound: SO2

Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Al (C2H3O2) 3 and LiNO3 are mixed.

Describe your observations of the original solutions. Describe your observations when the silver nitrate was added to the sodium chloride solution.

A gas occupies 18.5L at stp. what volume will it occupy at 735 torr and 57°c?

When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers.

Which best identifies why the rusting of an iron nail in the presence of water and oxygen is in oxidation-reduction reaction

In the laboratory hydrogen gas is usually made by the following reaction:Zn (s) + 2HCl (aq) = H2 (g) + ZnCl2 (aq) How many liters of H2 gas, collected over water at an atmospheric pressure of 752 mmHg and a temperture of 21 Co, can made from 3.