If you burn 45.2g of hydrogen and produce 404g of water, how much oxygen reacted

Assuming complete reaction, what volume of 0.200 mol dm-3 potassium hydroxide solution (koh (aq)), is required to neutralize 25.0 cm3 of 0.200 mol dm-3 aqueous sulfuric acid, (h2so4 (aq))

How are characteristic properties of a given substance is different from his other properties and chemical properties

A ballon is inflated with 2.42L of helium at a temperature of 27.0°C. When put in the freezer, the volume changes to 2.37L and - 8.8°C, and the pressure is measured to be 754torr. What was the initial pressure?

Use the term chloroplast and organelle in a sentence

Hannah is comparing a rock from a riverbed and a rock from deep underground. One is very smooth, and the other has very rough edges. Explain why each rock was probably found in that location

15 mL of a 0.16 M solution of glucose was diluted until the total volume reached 95 mL. What is the concentration of new solution?

Mendeleev used his arrangement of elements in order of increasing mass and repeated properties to predict the mass and properties of undiscovered elements. true or false

Describe the basic characteristics of each group of elements on the periodic table

When a 0.1 M H2SO4 solution is added to pulverized blackboard chalk, the following reaction takes place. CaCO3 (s) + H2SO4 (aq) - -> CaSO4 (s) + CO2 (g) + H2O (l) At 25°C, the reaction is spontaneous and has: A. negative ΔG' and positive ΔS' B.

What is a example of one natural source of radioactivity