When an acid reacts with metal, a salt and hydrogen are produced: acid + metal → salt + hydrogen The salt that is produced depends upon... View Article
2 Mg(s) + O2(g) → 2 MgO(s) As magnesium (Mg) has a valency of +2, and oxygen (O) has a valency of -2, the ratio would be 1:1, and magnesium... View Article
Answer: Plants that live in water and adapt to their environment are known as hydrophytes. They either remain totally submerged in the water... View Article
The three main states of matter are solid, liquid, and gas. Plasma is the fourth state of matter. Several exotic states also exist. Solids are a... View Article
We can find the side of the square, using the area formula. Area of a square: Area = (Side) 2 ⇒(Side) 2 =98 Since all the sides have equal... View Article
Lime water reacts with carbon dioxide (CO2) in a two-step process. Limewater is calcium hydroxide dissolved in water. Ca(OH)2 + H2O → Ca++... View Article
Germanium is a semiconductor. The pure element was commonly doped with arsenic, gallium or other elements and used as a transistor in thousands... View Article
By direct calculation we get 2 ÷ 7 = 0.2857 Multiply your answer by 100. 0.2857 ⋅ 100 = 28.57 As a percentage: 28.57 % 2 is approximately 28.57... View Article
Function of cranial bone The bones in your skull can be divided into the cranial bones, which form your cranium, and facial bones, which make up... View Article
The electronic configuration of N2 is (σ1s) 2 (σ∗1s) 2 (σ2s) 2 (σ∗2s) 2 (π2px) 2 (π2py) 2 (σ2pz) the total number of electrons present in the... View Article
The barium chloride has a chemical formula i.e. BaCl2and it has a molar mass of 208.23 g mol-1. This salt is made with one barium cation (Ba2+)... View Article
Let x be the oxidation number of sulphur in sulphuric acid. Then we got: Oxidation number of Oxygen= -2 Oxidation number of Hydrogen= +1 1 â‹… 2 +... View Article
This is an AX4 -type molecule, with four Si-Cl bonds. According to VSEPR theory, these bonds must be pointing towards the corners of a regular... View Article
A simple epithelium is an epithelial tissue that is composed of a single layer of epithelial cells. These cells are in direct contact with the... View Article
FeSO4 is the chemical formula of iron(II) sulphate or ferrous sulphate . The colour of a ferrous sulphate solution is blue-green. FeCI3 is the... View Article
The aneroid barometer is used to measure atmospheric pressure as well as altitude. It consists basically of an evacuated flat cylindrical closed... View Article
For any element: Number of Protons = Atomic Number Number of Electrons = Number of Protons = Atomic Number Number of Neutrons = Mass Number -... View Article
Carbohydrates are basically compounds made up of carbon, oxygen and Hydrogen. The general formula if carbohydrates is Cx(H20)Y Glucose is C6H12O6... View Article
The average atomic mass of Br is 79.91 u. There are two ways to solve this problem. Let's assume we have 10 000 atoms of Br. Then 5069 atoms will... View Article
