1.39 g HCl
Explanation:
The balanced chemical equation for this reaction is given by
Zn(<em>s</em>) + 2HCl(<em>aq</em>) ---> ZnCl2(<em>aq</em>) + H2(<em>g</em>)
Convert the # of grams of Zn to moles:
1.25 g Zn × (1 mol Zn/65.38 g Zn) = 0.0191 mol Zn
Use the molar ratio to find the # of moles of HCl needed to react completely with the given amount of Zn:
0.0191 mol Zn × (2 mol HCl/1 mol Zn) = 0.0382 mol HCl
Convert this amount to grams:
0.0382 mol HCl × (36.458 g HCl/1 mol HCl) = 1.39 g HCl
Answer:
Hi
The solid is dissolved in the hot, boiling method, the hot mixture is filtered to remove all insoluble impurities, and then the solution is allowed to cool to produce crystallization. All desired substance must be separated in crystalline form and all soluble impurities must remain dissolved in the mother liquors. Finally, the crystals are filtered off and allowed to dry. If a pure substance does not reach a pure substance, the process can be repeated using the same or another problem.
Finally, and once the filtrate cools, said crystals are filtered by means of suction; and washed (cold) in a Büchner to completely remove adhering mother liquors, drying them to remove traces of insulation.
Explanation:
Answer : Protein
Explanation : When the scientist isolated the water soluble compound from the spider venom it had elements such as carbon,nitrogen, hydrogen and oxygen in its chemical structure this gives an assumption of the compound being a protein. But, further confirmation was given when it was injected under the mice skin and which broke down the structural materials in the cell membrane, this is one of the property of protein. And he is going to find out about its toxicity to humans.
Bismuth... hope it helps!
Mass percent is calculated by the ratio of the mass of the substance in a sample over the total mass of the sample multiplied by 100. Assuming 1 mol of the acid, we will have 74.09 g. We do as follows:
% by mass C = 3 ( 12.01) / 74.09 x 100 = 48.63% C