Classify the following as either an element, a compound, a heterogeneous mixture, or a homogeneous mixture and explain your answer. Skittles
Kool Aid
Pepsi
Gold (Au)
Carbon Dioxide (CO2)
Hydrogen (H2)
Raisin Bran Cereal
Lucky Charms Cereal
Salt Water
Salt (NaCl)
Oxygen (O2)
Methane (CH4)

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.