M& m balancing
now count the number of each type of whole molecule.
how many he's do you have?
how many oz's do you have?
how many h2o's do you have?
***these are your new coefficients of the equation. fill them in the spaces below.
_h2 + _
_02>
h2o
now answer the following questions.
how many hydrogen candies are on the left side of the arrow?
how many oxygen candies are on the left side of the arrow?
how many hydrogen candies are on the right side of the arrow?
how many oxygen candies are on the right side of the arrow?
is the equation a balanced equation?
***you may eat your h2 + o2 → h2o candies now.
now you will do the same thing with the following equations. check with your teacher when done.
put the initial compounds in the boxes before adding whole !
reaction 2: sodium chloride plus calcium oxide produces sodium oxide plus calcium chloride
naci
+
| cao
|
-->
|
na20
|
+
|
cacl2
_nacl +
cao >
na2o +
cacl2

Astudent from one of the research labs is having trouble preparing a slide for examination and photographing. the bacterial slide that he has brought to you was prepared using a commercially purchased stain. he has asked for your in determining what he is doing wrong so that he can change the lab protocols and continue on with his project. after examining the slide under oil immersion, you determine that no bacteria are present even though the student is able to show you the culture he used to make that slide that has visible growth in the liquid medium. which of the following statements does not explain the fact that there are no bacteria present on the student’s slide? by not allowing a glass slide to completely air dry before heat fixation, the flame will cause the surrounding water to boil and this will damage the bacterial cell. overheating during the fixation step boiled the water within the bacterial cells and resulted in the cells bursting. insufficient heating of the slide did not drive out the thin layer of water and this resulted in minimal bonding between the bacteria and the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide. rinsing with alcohol during the washing step stripped the bacteria off the glass slide.