Atank contains helium gas at 490 mmhg, nitrogen gas at 0.75 atm, and neon at 520 torr. what is the total pressure in atm? (don't forget to convert pressure units and sig fig rules)

Which element is the least metallic between cadmium, silver, zinc, or iron?

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next