Which of the following is a balanced chemical equation?

mgf2 + li2co3 ⟶ mgco3 + lif
ch4 + 2o2 ⟶ co2 + h
2al + 6hcl ⟶ 3h2 + alcl3
p4 + 3o2 ⟶ 2p2o3

Which diagram represents the phase tha occurs after a solid melts?

Convert a speed of 201 cm/s to units of inches per minute. also, show the unit analysis by dragging components into the unit‑factor slots.

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?