Which is an example of using an "external brain"? O
A. Taking photos at your birthday party
B. Remembering your 16th birthday
C. Opening your birthday presents
D. Enjoying your birthday cake

Zinc + lead(ii) nitrate yield zinc nitrate + leadwhat's the chemical equation for this?

Amass of 100.0 g of solute is dissolved in water so that 850. ml of a 0.7500 m solution has been prepared. what is the molar mass of the solute?

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.