What do the colors produced by fireworks indicate? a. a physical change c. a state change b. a chemical change d. an element change

What does a "fixed amount of fuel" mean?

How do rockets work? What chemicals are used and what reactions happens with those chemicals to make a rocket fly?

What is the molar mass of Fe (NO3) 2?

What does a salt bridge do

When nuclear fission occurs ... A. it must be initiated by bombardment with neutrons. B. two nuclei combine to produce a heavier nucleus. C. it is a spontaneous reaction. D. the chain reaction that results cannot be controlled.

How much MnO2 (s) should be added to excess HCl (aq) to obtain 295 mL of Cl2 (g) at 25 °C and 735 Torr?

Why do people describe water as a universal solvent

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?

For the complete combustion of 5.6dm3 of a gaseuos hydrocarbon CxHy. 28.0dm3 of oxygen gas were used, 16.8dm3 of CO2 gas and 18.0gof liquid water were produced all gases measurement were made at stp. Determine the chemical formula of the hydrocarbon