32 g of a metal, M, reacts with 8 g of oxygen to form an oxide. The formula of the oxide is MO. What is the atomic mass of M in g mol-? ​

M= 128 g/mol (Te is quite close)

Explanation: number of Oxygen moles is n = 8 g / 32 g/mol = 0,25 mol.

Because formula of oxide is MO, thus amount of metal is also 0,25 mol.

Because n = m/M , Molar mass of the metal M = m/n = 32 g /0.25 mol = 128 g/ mol

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

ill try to . no promises tho.

explanation: