Which of the following equations is balanced?

2H2 + O2 → 4H2O

4Na + O2 → 2Na2O

Fe2O3 + H2 → 2Fe + 3H2O

CH4 + O2 → CO2 + H2O

Which of the following equations is equivalent to 3/4a-6=1/4? 3a - 24 = 1 3a - 6 = 4 3a - 6 = 1 3a - 24 = 24

Calculate the volume of a 0.200 M KCl solution containing 5.00 10-2 mol of solute. Enter your answer in the provided box. IL

Methanol (CH3OH) burns in air according to the equation 2CH3OH + 3O2 → 2CO2 + 4H2O If 201 g of methanol are used up in a combustion process, what is the mass of H2O produced?

The empirical formula for two compounds that have very different properties (one tastes very sour and the other very sweet) is ch2o. if the molar mass of compound a is 60.05 g/mol and compound b is 180.

In the reaction Na2CO3 + 2HCl → 2NaCl + CO2 + H2O, how many grams of CO2 are produced when 7.5 moles of HCl is fully reacted?

Gas y effuses half as fast as o2. what is the molar mass of gas y?

A sample of gas has a mass of 0.555g. volume is 117 mL at a temperature of 85 degrees Celsius and a pressure of 0.99 atm. What is the molar mass of the gas?

What is the molar mass of potassium

A chemist determined by measurements that 0.050 moles of aluminum participated in a chemical reaction. Calculate the mass of aluminum that participated in the chemical reaction. Be sure your answer has the correct number of significant digits.

In 1901, Thomas Edison invented the nickel-iron battery. The following reaction takes place in the battery. Fe (s) + 2 NiO (OH) (s) + 2 H2O (l) Fe (OH) 2 (s) + 2 Ni (OH) 2 (aq) How many mole of Fe (OH) 2, is produced when 5.35 mol Fe and 7.