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You have to be careful about pouring drano down your pipes since it is mainly hydrochloric acid--you can't do it if they are made of aluminum because it will dissolve them! You can't acid clean your aluminum auto parts for the same reasons: 2 Al + 6 HCl → 2 AlCl3 + 3H2. If you wanted to make 10.0 moles of hydrogen gas, how many many moles of Al would you need? NOTE: All numbers located immediately after elemental symbols should be considered subscripts.
A. 3.33 moles
B. 6.67 moles
C. 2.00 moles
D. 3.00 moles
E. none of the above
describe the basic steps involved in a gravimetric analysis. how does this procedure help us determine the identity of
If 25 g of al and 100g of br2 are reacted and if 64.2 grams of aliminum bromide is formed. what is the limiting reagent
Assuming that the peaks are Gaussian, calculate the % resolution, i.e. calculate the area under the first peak which lies to the left of half way between the two peaks.
The Group 5A elements N,P,As have lower (less negative) electron affinities than most of the Group 4A or Group 6A elements because N,P,As have half-filled subshells.
At room temperature (20^circ rm C), milk turns sour in about 63 hours. In a refrigerator at 3^circ rm C, milk can be stored three times as long before it sours. Estimate the activation energy of the reaction that causes the milk to sour.
A second-order reaction has a rate constant , k, of 0.90 1/M.min. If the initial concentration of the reactant is 2.25 M , what will be the concentration of reactant after 10 minutes?
Explain a wavelength of 925.4 nm has been detected from the emission of a hydrogen gas tube while under excitation from a high voltage source in a lab. This was caused by an electron dropping from a higher voltage source.
Calculate the molar mass of naphthalene, the organic compound in mothballs, if a solution prepared by disovlving 7.50g of naphthalene in exactly 150g of benzene has a freazing point 2.0 degrees
Select 10 reactions that produce a precipitate, color change or gas and state balanced chemical equation and a net ionic equation for each. Keep in mind a reaction may be indicated by the formation of a precipitate, color change, or the formation ..
A gaseous mixture of and has a density of 1.104 at 445 and 300 . What is the mole percent in the mixture?
Question- A 100.0 mL sample of 0.20 M HF is titrated with 0.10 M KOH. Determine the pH of the solution before the addition of any KOH. The Ka of HF is 3.5 x 10-4.
Nuclides above the valley of stability can become more stable through which of the following processes
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