C= 2,8 mol H2 =3,amol
3C(s) + 3H2(g) —>CH4(g) + HC = CH(g) ΔΗ= 310 kJ
CH4=? mol
HC = CH = ? moll
How to find the mol of
CH4 and HC=CH?

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products

Which of the following is most likely true about water in chemical solutions?