Answer:
12.6 g O2 or
12.60 g O2 (if needed two decimal places)
Explanation:
First convert grams into moles:
17.4 g KCl × 1
74.55
= 0.233 moles of KCl
Next solve for the mole of O2:
= 0.233 × 3 moles of O2
2 moles of KCl
= 0.3495 or
= 0.350 moles of O2
Finally convert the mole to grams:
= 0.350 moles of O2 × 36g
1 mole
= 12.6 g O2 or 12.60 g O2
Answer:
a car traveled 20m &400k/g
what would happen if you put vegetable oil and ice cubes into a beaker together? what would happen if you left it on the counter overnight?
Before tackling this problem, be sure you know how to find the antilog of a number using a scientific calculator.
A solution has a pH of 5.4. Write the formula you will use to calculate the [H+] and then show all your work leading to the determination of [H+].
A solution has a pH of 5.4, the determination of [H+].
Given :- pH:- 5.4 pH = - log[H+]To find :- concentration of H+Answer:- Antilog(-5.4) or 4× 10-⁶Explanation:- Formula:- pH = -log H+Take negative to other side
-pH = log H+
multiple Antilog on both side
(Antilog and log cancel each other )
Antilog (-pH) = [ H+ ]
New Formula :- Antilog (-pH) = [+H]
Now put the values of pH in new formula
Antilog (-5.4) = [+H]
we can write -5.4 as (-6+0.6) just to solve Antilog
Antilog ( -6+0.6 ) = [+H]
Antilog (-6) × Antilog (0.6) = [+H]
[tex]Antilog (-6) = {10}^{ - 6} , \\ Antilog (0.6) = 4 [/tex]
put the value in equation
[tex] {10}^{ - 6} \times 4 = [H+] \\ 4 \times {10}^{ - 6} = [H+][/tex]
Balance the equation