How do you do parentheses in a chemical equation?
Parentheses are useless in a chemical formula if they don’t have a subscript, so we’ll assume one is always there. In such a formula, the subscript outside the parentheses means that to count atoms, you must multiply that subscript by the numbers of atoms inside.
What is a charge balanced formula?
Charge Balance – the sum of the positive charges in solution must equal the sum of negative charges. e.g. sulfate ion CSO42- = 0.0167 M. Charge balance equation, p. 266.
What is a mass balance equation?
A Mass Balance Equation describes the transient distribution of mass at every point in space. We first introduce the combined flux term, Ni. This represents the number of mass/moles of ‘i’ that go through a unit area in a unit time. As you might have guessed, it is composed of the diffusive and convective flux terms.
What charge does a chemical formula have?
The charges of the ions in a chemical formula always add up to zero. This is because positive and negative charges attract each other. This continues to happen until the charges balance and there is no more attraction.
How do you identify a chemical formula?
Key Points
- A molecular formula consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule.
- The empirical formula represents the simplest whole-integer ratio of atoms in a compound.
How chemical formula is written?
A Chemical formula represents the proportions, by mass of the different elements in a compound. A binary compound is composed of two different elements only. Formulae of binary compounds can be written using valencies since both types of atom forming the compound must lose, gain or share the same number of electrons.
What are 10 common chemicals used at home?
List of Chemicals used in daily life
| S:No | Common name of the Chemical | Molecular Formula and IUPAC name |
|---|---|---|
| 10 | Sugar | Sucrose; C12H22O11 |
| 11 | Aspirin | C9H8O4; acetyl salicylic acid |
| 12 | Mouthwash | H2O2; hydrogen peroxide, |
| 13 | Caustic soda | NaOH; sodium hydroxide |
What is the formula for glucose?
C₆H₁₂O₆
What is chemical formula of water?
H2O
What is the chemical name of H2O?
Oxidane
What is the five uses of water?
Direct purposes include bathing, drinking, and cooking, while examples of indirect purposes are the use of water in processing wood to make paper and in producing steel for automobiles. The bulk of the world’s water use is for agriculture, industry, and electricity.
How can we kill germs in our drinking water?
Emergency Disinfection of Drinking Water
- Use bottled water or water you have properly prepared and stored as an emergency water supply.
- Boil water, if you do not have bottled water. Boiling is sufficient to kill pathogenic bacteria, viruses and protozoa (WHO, 2015).
- Disinfect water using household bleach, if you can’t boil water.
What is normal water usage per month?
The water industry estimates that an average person uses 3,000 gallons of water monthly, so a family of 4 would use 12,000 gallons for bathing, cooking, washing, recreation and watering.
What are the 4 forms of water?
Water is present in oceans, seas, lakes, rivers, ice caps, as groundwater and in the atmosphere. Water exists in different forms. On the earth’s surface, there are three different forms of water namely solid, liquid and gaseous.