A sample substance has the chemical formula: H2CO3
One molecule of the sample contains -

Two different elements with atomic numbers 1 and 27

Two different elements with atomic numbers 1, 6, and 8

Two different elements with atomic numbers 2 and 29

Two different elements with atomic numbers 2, 8 and 20

Butadiene undergoes a reaction at a certain temperature in the gas phase as follows: 2c4h6(g) --> c8h12(g) the following data were collected for this reaction: time (min) [c4h6] (m) 0 0.36 15 0.30 30 0.25 48 0.19 75 0. determine the order of the reaction and the rate constant. 1st order and k = 4.3x10 -4 s-1 1st order and k = 2.3x10-4 s-1 2nd order and k = 4.3x10-4 s-1 2nd order and k = 2.3x10-4 s-1 zero and k = 4.3x10-4 s-1

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule