at stp which of following would have the same number of molecules a 1 l of c2h4 gas? a. 0.5 of H2 b. 1L of Ne c. 2L of H2O d. 3L of cl2

If the percent (mass/mass) for absolute is 6% and the mass of the solution is 300g, what is the mass of the solution?

Which best describes Earth's magnetic field lines? The field lines go out of Earth near Antarctica, enter Earth in northern Canada, and are aligned with the geographic poles.

A weather balloon contains 1.10X10 to the power of 5 mol of helium and has a volume of 2.70x10 to the power of 6 L at 1.00 atm pressure. Calculate the temperature of the helium

Calculate the pH of a sample of acid that contains 0.001 moles HCl in a volume of 100.0 mL

How many electrons would sulfer need to lose or gain to achieve a noble gas configuration? What would the resulting charge of the ion?

A. Write an equation for determining the number of moles of NaOH that are added to the flask based on [NaOH] and volume of NaOH titrant (mL NaOH): B.

Is romano cheese an element, compound, homogeneous mixture, or heterogeneous mixture?

Which of the following is an appropriate food storage method

Why should your disposal of excess magnesium take place in a fume hood? (choose all that apply) Group of answer choices The quench released hydrogen gas, which is flammable and explosive The quench is highly exothermic and might cause the solvent to

For the chemical equation SO2 (g) + NO2 (g) SO3 (g) + NO (g) SO2 (g) the equilibrium constant at a certain temperature is 3.00. At this temperature, calculate the number of moles of NO2 (g) that must be added to 2.30 mol SO2 (g) in order to form 1.