The enthalpies of formation of the compounds in the combustion of methane,
ch4 (9)+20,(g) → c02(g) +2h2o(g),
are ch4(g): ah = -74.6 kj/mol; co2(g): ah+ = -393.5 kj/mol; and h2o(g): ahp= -241.82 kj/mol.
how much heat is released by the combustion of 2 mol of methane?
use ah xn=(ahi products) - (ahereactants).
-80.3 kj
-802.5 kj
o-1,605.1 kj
o -6,420.3 kj

Janel’s class studied properties of matter and how matter can change. janel decided she would do an experiment mixing baking soda and vinegar.question: describe the properties of baking soda and vinegar, and explain the changes that janel should see when she mixes the two types of matter. •first, identify the physical state of matter of baking soda. describe another property of baking soda. •next, identify the physical state of matter of vinegar. describe another property of vinegar. •then, explain what janel should see when she mixes the baking soda and vinegar. •describe the states of matter of the new materials that are formed. •explain how janel can be certain a change has occurred. me

How many molecules are found in 1.32 mol of nacl?

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils