The table shows the chemical formulas for four substances. c8h18https://staarbank. schoolobjects. com/eduphoria_webcontrols/tests/Tes tImage. aspx?bnk=staarbank&aid=9b51137e -2d09-457a-bd71-6bc1f7bd5bb8&mo de=edit
Which substances have the same number of carbon atoms?
A. Substances 1 and 2
B. Substances 1 and 3
C. Substances 2, 3, and 4
D. Substances 2 and 3 only

Will mark brainliest 26. which of these statements are true? (3 points) a. gases are compressible b. gases fill their containers completely c. the pressure of a gas is independent of the temperature d. gases have mass e. gases exert pressure f. the pressure of a gas is dependent on the volume g. gas pressure results from the collisions between gas particles h. gases have a definite volume and shape

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.