2NaCN(s) + H₂SO₄(aq) --> Na₂SO₄(aq) + 2HCN(g)
The molar ratio between NaCN : HCN is 2:2 or 1:1
Mass of HCN = 16.7 g
Molar mass of HCN = 1 + 12 + 14 = 27 g/mol
Molar mass of NaCN = 49 g/mol
Therefore, the mass of NaCN is
16.7 g of HCN x 49 g/mol of NaCN / 27 g/mol of HCN = 30.3 grams of NaCN
Therefore, 30.3 grams of NaCN gives the lethal dose in the room.
Answer:
They are helpers of the world who find out about the natural world and try to explain what they have observed.
Explanation:
Copper (II) Carbonate + Heat yields copper (II) oxide and carbon dioxide
Molecular Equation: CuCo3 + heat > CuO + CO2
<u>Answer :</u>
Chemical energy - D) Potential energy stored in the bonds between atoms
Electrical energy - C) The movement of an electrical charge
Radiant energy - B) Electromagnetic energy that travels in waves
Thermal energy - A) Internal energy caused by vibrations of atoms and molecules
<u>Explanation :</u>
Chemical energy : It is the type of energy in which the potential energy is stored in the bonds between the atoms.
Electrical energy : It is a type of energy in which the electrical charge are moved.
Radiant energy : It is a type of energy in which the electromagnetic energy travels in the waves.
Thermal energy : It is a type of energy in which an internal energy caused by the vibrations of atoms and the molecules.
The segment of the myocardial conduction framework that has the quickest rate of unconstrained depolarization is the S-A node.Depolarization goes through particular conduction pathways from the S-A hub to the A-V hub. This atrial depolarization happens at a most extreme rate of 0.3 m/sec
