Is carbon dioxide a compound, element, or a mixture? wat about air wat is it

Which process takes place when a rechargeable battery is recharged? electrons are pushed onto the positive cathode. electrons are pushed onto the negative anode. electrons are pulled off of the positive anode.

Which molecule contains ten hydrogen atoms

Fe2o3 (s) + 3h2 (g) →2fe (s) + 3h2o (l) Calculate the mass of H2O

How does a fan use electrical energy? (a) The fan turns electrical energy into energy of motion. (b) The fan turns wind energy into electrical energy. (c) The blades of the fan spin and produce electrical energy.

How many grams of NO will be produced from 60.0g of NO2 reacted with excess water in the following chemical reaction? 3NO2 (g) + H2O (l) - -> 2HNO3 (g) + NO (g)

Organize the items listed into the proper sequence of events for gas exchange. a: O2 is transported to cells by circulatory system. b: O2 is drawn into the lungs during inhalation. c: Cells use O2 and generate CO2. d: CO2 is exhaled.

Research about the reaction of baking soda and vinegar

What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

Given the propane molecule C3H8 (g) ! a) What is the balanced equation for the combustion of propane in O2? (20 pts.) b) What is the standard enthalpy change ΔH0 for the reaction at 25°C? (20 pts.

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.