Platinum is used to catalyze the hydrogenation of ethylene: h2(g)+ch2ch2(g)−⟶pt(s)ch3ch3(g)chlo rofluorocarbons (cfcs) catalyze the conversion of ozone (o3) to oxygen gas (o2): 2o3(g)−⟶cfc(g)3o2(g)magnesium catalyzes the disproportionation of hydrogen peroxide to produce water and oxygen: 2h2o2(aq)−⟶mg(s)2h2o(l)+o2(g)what type of catalysts are platinum, cfcs, and magnesium under these conditions? drag the appropriate items to their respective bins.

Which change in temperature is the smallest? a change of 1 thomson degree a change of 1 kelvin degree a change of 1 fahrenheit degree a change of 1 celsius degree

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size