Answer:no answer
Explanation:
Temperature. Usually reactions speed up with increasing temperature. Physical state of reactants. Powders react faster than blocks - greater surface area and since the reaction occurs at the surface we get a faster rate.
1st and 4th options are suitable answers, as these 2 changes are not exactly physical changes as it cant return back to original form and as well as its not cooling, so I feel its 1st and 4th options
Answer:
see explanation
Explanation:
(Molarity x Volume)concentrate = (Molarity x Volume)diluted
14M x V(concentrate) = 5M x 3L
V(concentrate) = (5M x 3L)/14M = 1.07L of concentrate needed
Mixing:
On mixing water directly into nitric acid at high concentrations the solution tends to hydrate very rapidly and release heat extensively and perhaps splash back solution onto surroundings. Thus, one should apply caution and wear safety clothing; i.e., gloves and protective eye ware while working with such systems.
With the hazards of mixing in mind, one should first add a small quantity of water solvent into the mixing vessel, perhaps 0.50L - 1.00L of the solvent water. Then slowly add the needed amount (in this case 1.07L of the 14M nitric acid solution) of nitric acid into the solvent water. Then dilute further with solvent water up to but not to exceed the 3L reference mark of the mixing container. Mix and carefully transfer the new solution (3L of 5M HNO₃) into an appropriate storage container and seal.
Note: As with any chemical of interest, one should review the MSDS for the reagent being used, noting hazards and proper laboratory handling in order to avoid accidents and/or injury that may occur as a result of improper use.
As a general rule, always add acid into water, NEVER water into acid. Remember A&W (acid into water) root beer.
<span>186 thousand miles per second i believe
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