Why is it not a good idea to use a stopper when combining two unknown substances in test?

How many grams of glucose would be present in one liter of a 1 m solution of glucose?

cliff hanger smokes 1 pack of cigarettes per day. How many cigarettes will be smoke in 7 years of smoking at that rate? (1 pack = 20 cigarettes)

Jason ran 5/7 of the distance around the school track sara ran 4/5 of Jason distance what fraction of the total distance around the track did sara run

Convert 360 degrees celcius into kelvin

Which of these pure substances has the highest vapor pressure at 1 atm? Note: Vapor Pressure is inversely related to IMF strength, O CH4 O NH3 PH3 SIH4

Compared to a potassium atom, a potassium ion has A) a smaller radius B) a larger radius C) fewer protons D) more protons

Which unit measures mass?

The mechanism for the reaction described by 2N2O5 (g) - - - > 4NO2 (g) + O2 (g) is suggested to be (1) N2O5 (g) (k1) - - - > (K-1) NO2 (g) + NO3 (g) (2) NO2 (g) + NO3 (g) - - - > (K2) NO2 (g) + O2 (g) + NO (g) (3) NO (g) + N2O5 (g) - - - > (K3) 3NO2

Which question can be answered using the scientific method? A) Which dog food is best for healthy teeth? B) What color is the most attractive? C) What is my purpose in life? D) Which flower smells the best?

For the galvanic cell reaction, expressed below using shorthand notation, what half-reaction occurs at the cathode?