Before investigating the scene, the technician must dilute the luminol solution to a concentration of 4. 00×10−2 m. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2. 00 l of the diluted spray?.

Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?

Which food would provide you with the most calcium?