5 km 8
Sally Drives 120 km for 1.5 hours, rest for 0.5 hours and finishes her trip by driving an additional 80 km in 1
hour. What was her average speed during her car trip in km/h?
Sally conduce 120 km durante 1,5 horas, descansa durante 0,5 horas y finaliza su viaje conduciendo 80 km
adicionales en 1 hora. ¿Cuál fue su velocidad promedio durante su viaje en automóvil en km/h?
66.7
120
1.5
0.5
I

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?