3. Chemical Reactions
Molecular Formula
04:26
Practice this topic
- Multiple Choice
Elemental analysis of a pure compound indicated that the compound had 72.2% C, 8.50% H and the remainder as O. If 0.250 moles of the compound weighs 41.55 g, what is the molecular formula of the compound?
3680views30rank1comments - Multiple ChoiceWhich of the following is NOT a molecular compound?1508views1rank
- Multiple ChoiceWhich of the following is a molecular element?1294views
- Multiple ChoiceWhich of the following names and formulas are NOT paired correctly?943views
- Textbook Question
Glycine, an amino acid used by organisms to make proteins, is represented by the following molecular model. (a) Write its molecular formula.
621views - Textbook Question
The following diagram represents an ionic compound in which the red spheres represent cations and the blue spheres represent anions. Which of the following formulas is consistent with the drawing? KBr, K2SO4, Ca1NO322, Fe21SO423.
636views - Textbook Question
Which molecular scale image best represents the ionic com-pound that forms between cesium and chlorine? (Cesium is represented by red circles, and chlorine is represented by blue circles.) (LO 6.12) (a)
(b)
(c)
(d)
272views - Textbook QuestionLactic acid forms in muscle tissue after strenuous exercise. Elemental analysis shows that lactic acid is 40.0% carbon, 6.71% hydrogen, and 53.3% oxygen by mass. If the molec-ular weight of lactic acid is 90.08, what is the molecular for-mula? (LO 3.11) (a) CH2O (b) C3H6O3(c) C4H8O4 (d) C4H10O21188views