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We start from the concentration of OH- given then multiply this to the desired volume of the solution to obtain the number of moles OH- needed.
0.100 mol OH- / L soln ( 0.250 L) = 0.025 mol OH-
We then use the relation of OH ions with the OH ions formed when <span>Sr(OH)2 • 8 H2O is dissolved in water to calculate the number of moles of the compound needed. Finally we multiply the value with the molar mass given to obtain the number of grams needed.
0.025 mol OH- (1 mol </span>Sr(OH)2 • 8 H2O / 2 mol OH-) (265.76 g / 1 mol) = 3.322 g <span>Sr(OH)2 • 8 H2O</span> needed
Answer:
20000 mg
Explanation:
1 kg = 1000000
so if u multiply 0.020kg by 1000000 u get 20000
Answer:physical: a part falling off or changing a tire. chemical:rust
Explanation:
If you're finding the volume of NaCl dissolved you'll get 0.675