How are elements and compounds are different

Find δh°rxn for the reaction ch4 (g) + 2o2 (g) → co2 (g) + 2h2o (l). [δh°f (ch4 (g)) = - 74.8 kj/mol; δh°f (co2 (g)) = - 393.5 kj/mol; δh°f (h2o (l)) = - 285.5 kj/mol]

A 5.0 Km race is sheduled for this weekend. How many mies is this race?

A substance that speeds up the rate of a chemical reaction is called a. a catalyst b. a substrate. c. an enzyme. d. Both A and C

21 Which mathematical expression represents the heat of reaction for a chemical reaction? (1) (the heat of fusion) - (the heat of vaporization) (2) (the heat of vaporization) - (the heat of fusion) (3) (the potential energy of the products) - (the

The shape of elongated hills labeled drumlins is most useful in determining the A) Age of glaciers B) Direction of glacier movement C) Thickness of glacial ice D) Rate of glacial movement

The tapeats sandstone in the grand canyon is an example of a clastic sedimentary rock. such clastic sedimentary rocks can be distinguished from biochemical sedimentary rocks by

An ice cube and a scoop of table salt are left outside on a warm, sunny day. Explain why the ice cube melts and the salt does not

Which atomic orbitals overlap to form the C-O bond of dimethyl ether, (CH3) 20? O c 2sp^3 + 2sp^3 OC 2sp^2 + 0 2p O c 2sp^2 + 0 25p^2 O C 2sp^3 + O 2sp?

For the reaction CO+2H2=CH3OH at 700 K, equilibrium concentrations are [H2]=0.072 M, [CO] = 0.020M, and [CH3OH] = 0.030 M. Calculate K

How to make fluffy slime without contact solution?