By varying the proportions of copper and zinc, the properties of the brass can be changed, allowing hard and soft brasses. The density of brass is approximately .303 lb/cubic inch, 8.4 to 8.73 grams per cubic centimetre.
* Peptic ulcers. * Smoking cigarettes. * Drinking carbonated beverages. * Consuming fatty or spicy food, citrus fruits, tomato products, onions and chocolate. * Gastritis. * Taking medications including ibuprofen, aspirin, and certain drugs used to treat hypertension.
Chronic heartburn is usually from acid reflux - stomach acid is getting past the little valve and into your esophagus. You also should know some natural ways to treat your heartburn. Learn them here. https://tr.im/BestCureHeartburn. The most immediate thing you can do is to stop drinking coffee and cola.