1) In order to write formulas of chemical compounds we need the periodic table to find out some oxidation numbers.
Sulfuric acid: H2SO4. This compound has a polyatomic ion called sulfate with a 2- charge. To balance those negative charges we need two H+ ions.
Nitrogen: N2
Oxygen: O2
Ammonia: NH3
Lime: CaCO3. This compound is made up of calcium (Ca2+) and a polyatomic ion called carbonate (CO3 2-). Two positive charges and two negative charges. It is balanced.
Phosphoric acid: H3PO4. This compound has a polyatomic ion called phosphate with a 3- charge. In this compound, we need 3 H+ to balance those negative charges.
Sodium hydroxide: NaOH. Hydroxide compounds have a two-part name. The name of the cation (Na+) and the name of the hydroxide (OH-). One positive charge and one negative charge. It is balanced.
Chlorine: Cl2.
Sodium carbonate: Na2CO3. This compound has a polyatomic ion called carbonate with a 2- charge. We need two positive charges to balance the compound. Sodium is in the first group in the periodic table. That means sodium has just one positive charge, so we need two sodiums.
Nitric acid: HNO3. This compound has a polyatomic ion called nitrate with a 1- charge. To balance that negative charge we need one H+ ion.
Glucose is used by intestinal cells and red blood cells, while the rest reaches the liver, adipose tissue and muscle cells, where it is absorbed and stored as glycogen.
(it is saved to be used later)
The addition or subtraction of thermal energy. For example if you heat up an ice cube, it will melt to become water. If you heat it even more, it will evaporate.
Answer:
1 mole of any gas at STP occupies 22.4 liters of volume. Using this information, the volume occupied by any number of moles (or grams) can be determined.
Explanation:
This is physic.
because heat transfers from the hotter things to the cooler things
