A student decomposed a 1.25 gram sample of impure kclo3 (mm=122.5) and obtained 0.32 grams of oxygen. what is the percent purity of the original sample

Explain why hotter air rises in the atmosphere

Consider the following reaction: 2{/rm{ N}}_2 {/rm{O (}}g) /; / rightarrow /; 2{/rm{ N}}_2 (g) /; + /; {/rm{O}}_2 (g) a. In the first 12.0 s of the reaction, 1.7*10-2 mol of {/rm{O}}_2 is produced in a reaction vessel with a volume of 0.240 L.

At 1.75 atm, a sample of gas takes up 2.88L. If the pressure in the gas is increased to 2.25 atm, what will the new volume be

The round base of a copper tea kettle has a radius of 4 inches. What is the base's circumference? Use 3.14 for ?.

What will occur if solution A containing 400 mosmol/L nonpenetrating solute is separated by a biological membrane from solution B containing 600 mosmol/L nonpenetrating solute?

When electricity flows through a wire which of the following appears? Question 6 options: Gravitational Field Magnetic Field

Which of the following statements are correct about the chemical reaction? H2 + O2 - > H2O2 versus 2 H2 + O2 - > 2 H2O? They are both balanced chemical equations. The two reactions are equivalent. The laws of thermodynamics apply to both.

Explain how you would convert the moles of a compound to the made (grams) of the same compound

Which is the best definition of activation energy? O the energy required to end a chemical reaction O the energy required to bind a substrate to an active site O the energy required to form or break the bonds of reactant molecules O the energy

A chemist wants a 0.100 m solution of naoh. She has 0.0550 mol naoh available. What volume of solution is needed to make the mixture?