Answer:
A(yellow) = 52
Explanation:
A(yellow) = A(total) - A(red)
= 11×6 - 7×2
= 66 - 14
= 52
Mud dries and changes to dust. A match stick turns to ash while burning. stomach acids dessolving pizza. grape juice fermenting into wine. an iron pipe rusting. when in doubt if something is chemical or physical, know that physical changes can be state changes like condensation, melting, evaporation, freezing, etc. If a leaf is cut up, it is still a leaf, no matter how many times you cut it. if whats happening is changing what it is made of its a chemical change. hope this helped :)
Answer:
- 0.022% starch/min
Explanation:
Initial Conc. = 0.050 %
Final conc. = 0.028 %
Time = 1 min
Rate of Reaction = Rate of disappearance = Change in concentration of starch / time
Rate of disappearance = [0.028 - 0.050 ] / 1
Rate of disappearance = 0.022 / 1 = - 0.022% starch/min
The negative sign denotes that the starch is disappearing.
If I made no mistake in calculation, the given answer must be correct...(tried my best)
elements : carbon hydrogen oxygen Fluorine
composition [C] 24 3 16 57
M r 12 1 16 19
(divide C by Mr) 2 3 1 3
(Divide by smallest value) 2 3 1 3
(smallest value = 1...so all value remained constant)
Empirical formula : C2H3OF3
if molar mas = 100 g per mole, then
first step calculate Mr. of empirical formula: [= 100]
Them molecular formula = empirical formula
Explanation:
Uranium-238 undergoes a radioactive decay series consisting of 14 separate steps before producing stable lead-206. This series consists of eight α decays and six β decays.
