The relationship between H+ ion concentration and pH is pH=-lg[H+]. So the pH of the solution is -lg(1.25*10^-10) = 9.9.
ZnO(s) + 2HCl(aq) → ZnCl2 (s) + H2O(l)
Look at the moles:
1 + 2 → 1 + 1
How much ZnO do we need to make 50g of ZnCl2? Notice it is these numbers in () and should be 1:1
(1) + 2 → (1) + 1
So we need the same number of moles, but how many moles is 50g of ZnCl2? Zn weight is 65.38g, and Cl is 35.45g. So ZnCl2 is (65.38) + (2 X 35.45)=136.28g
50g/136.28g = 0.3669 moles
What is 0.3669 moles of ZnO now?
O weighs 16g/mol, so add 65.38 + 16 = 81.38
Multiply by 0.3669 moles and get how many grams we need.
Carbon: C
Oxygen: O2
C + O2 —> CO2
Reactants Product
The purpose of the scientific method "to use an experiment to test a scientific theory".
<u>Answer:</u> Option C
<u>Explanation:</u>
Researchers use the scientific method when conducting experiments to collect observable, empirical data in a hypothesis-related experiment , the findings that tend to justify or oppose a theory. It's also very important that other researchers can repeat and independently verify the conclusions, logic, and experiments.
Scientific method retains inductive reasoning its position. Scientists use this to formulate theories and hypotheses. In order to adapt the ideas to particular situations, deductive reasoning allows them to do so. Overall scientific methods have become path of analyzing different processes, going in our environment.
Mole ratio would be: C/B = 1/3
In short, Your Answer would be 1:3
Hope this helps!
