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The bond length of this molecule is roughly ________pm. Answer whole numbers rounded to the closest hundredth (e.g., 100, 200, 300, etc.).


if 15.50 grams of lead (II) nitrate mixes with 3.81 grams of sodium chloride how many grams of sodium nitrate are formed


helium gas is collected over water at 25 degrees C. What is the partial pressure of the helium given that the atmospheric pressure is 750.0 mmHg


The pressure of the system is increased. What effect will this have on the equilibrium shift of the reaction


The final pressure, temperature, and volume of a gas sample is 2.0 atm, 25 °C, and 515 mL, respectively. What is the original volume of the gas if the original temperature and pressure were standard temperature and pressure (STP)?



Some acids such as hydrochloric acid are described as strong acids. Some acids such as ethanoic acid are described as weak acids.

(a) (i) Explain the difference between a strong acid and a weak acid.


0g of aluminum reacts with 18.0 grams of chlorine gas to produce aluminum chloride. Which reactant is limiting, which is in excess? Balanced Equation: 2 Al + 3 Cl2 -> 2 AlCl3

Og of aluminum reacts with 18.o gas of chlorine gas to produce aluminum chloride which reactant is limiting which is in excess? balanced equation Al+3Cl2 2AlCl3

Calculate the wavelength of a particle with masses 9.11x10-31Kg travelling at speed 1.0x107 m/s and that of a ball of mass 0.1Kg travelling at 35 m/s. Comment on the significance of the wavelengths calculated.

Determine if it is Spontaneous or non-spontaneous and determine its direction.

Calculate the ∆H° and ∆S° for the following reaction.

NH4NO3(s)+H2O(I)—> NH4+(aq)+N0-3(aq)