Answer: The correct option is 1.
Explanation: Endothermic reactions are the reactions in which heat is provided to break down the reactant molecules.
In option 1:
The stronger intermolecular forces between the particles in solid molecule are broken down to convert into gaseous form. Hence, some energy in the form of heat is provided to move them far apart. Therefore, it is considered as an endothermic reaction.
In option 2, 3 and 4:
All the other processes involves the formation of bonds and thus there is no need to provide any energy.
Answer: a tornado doesnt have an eye in the middle and its cause by wind and air but a hurricane is way different then a tornado a hurricane is only perduce by air and the force of it can damage more than a tornado and the hurricane also has an eye in the middle and its bigger than a tornado so its C
Explanation:
The given chemical reaction given above is already balanced such that the number of atoms in the left hand side of the equation is equal to that of the right hand side. Using the dimensional analysis, proper conversion factors and the molar masses,
mass of nitrogen = (0.129 g H₂)(1 mol H₂/2 g H₂)(1 mol N₂/3 mol H₂)(28 g N₂/1 mol N₂)
mass of nitrogen = 0.602 g N₂
Therefore, 0.602 g of nitrogen will be required for he reaction.
Answer: Law of Conservation of Mass.
Explanation:
Law of Conservation of Mass states that during a chemical reaction mass neither created nor be destroyed or total mass of the reactants is equal to the total mass of the products in balanced chemical equation.
Total mass on the reactant side :
(Mass of one methane molecule + mass of two oxygen molecules)
=
Total mass on the product side :
(Mass of one carbon-dioxide molecule + mass of two molecules of water):
=
Total mass on the reactant side = Total mass on the product side = 80 u