If the pOH is 6.0, then the pH is 14.0 - 6.0 = 8.0 :)
Answer: -
A. An uncontrolled nuclear chain reaction is most likely to multiply exponentially.
Explanation: -
An nuclear chain reaction produces neutrons. These neutrons then can start new nuclear fissions. In a controlled nuclear fission, the number of neutrons allowed to start new fission is controlled.
In an uncontrolled reaction, the neutrons start fission very fast. These also start new nuclear fission, releasing more neutrons.
Thus. An uncontrolled nuclear chain reaction is most likely to multiply exponentially.
Answer:
1a) .68 moles 1b)4.1E-23 molecules.
2a) .37 moles 2b) 2.27E-23 molecules
Explanation:
1a) CO2 is equal to 44 grams (C→12 grams,O→16 grams[·2]) .30g/44g is .68 moles.
1b) multiply 1A by advogadros number (6.022E-23)
2a) NaCl is 58 grams. 22/58 is .37 moles.
2b) multiply 2A by advogadros number.
you'd answer #3 the same way #1 and #2
First we look at the chemical reaction:
2 Na + Cl₂ → 2 NaCl
Now we should see which is the limiting reagent, so we construct the following reasoning:
if 2 moles of Na reacts with 1 mole of Cl₂
then 2.4 moles of Na reacts with X moles of Cl₂
X = (2.4 × 1) / 2 = 1.2 mole of Cl₂ (way lower that the available quantity of chlorine).
So the limiting reagent is sodium, and from here we can calculate the number of moles of NaCl produced.
if 2 moles of Na produces 2 moles of NaCl
then 2.4 moles of Na produces Y moles of NaCl
Y = (2.4 × 2) / 2 = 2.4 moles fo NaCl (sodium chloride)
Word equation - calcium + oxygen -> calcium oxide
Chemical equation - Ca + O2 -> CaO2
Hope this helps!
