Explanation:
the answer is in the above image
Answer: 0.4mL of the stock solution is needed
Explanation:
This is simply a dilution analysis. From the question, the following were obtained:
C1 = 25 mg/mL = 25x10^-3g/mL
V1 =?
C2 = 25 ug/mL = 25x10^-6g/mL
V2 = 400ml
Applying the dilution formula, we have:
C1V1 = C2V2
25x10^-3 x V1 = 25x10^-6 x 400
Divide both side by 25x10^-3, we have:
V1 = (25x10^-6 x 400) / 25x10^-3
V1 = 0.4mL
Therefore, 0.4mL of the stock solution need.
Answer:
Explanation:
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In this case, since the Avogadro's number is a large one that help us to figure out 1 mole of any substance contains 6.022x10²³ particles, say atoms, molecules or ions, in this case, for the given amount of atoms of sulfur, the corresponding moles are obtain down below:
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In viewing a chemical equation,we <span>determine the ratios that relate reactants and products </span>from the coefficients of the reactants and products .
Answer:
Mass movement, or mass wasting, has significant effects on humans, including loss of property, severe injury and death.
Explanation:
