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How many atoms of hydrogen (H) are present in 200 molecules of ammonia (NH_3)?
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- 1. Intro to General Chemistry4h 5m
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2. Atoms & Elements
Mole Concept
Scelta multipla
How many moles of KI are required to prepare 0.50 L of a 0.20 M aqueous solution?
A
0.10 mol
B
0.05 mol
C
0.20 mol
D
0.40 mol
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Guida verificata passo dopo passo1
Identify the formula relating molarity (M), moles of solute (n), and volume of solution (V): \(M = \frac{n}{V}\).
Rearrange the formula to solve for moles of solute: \(n = M \times V\).
Substitute the given values into the equation: \(M = 0.20\, \text{mol/L}\) and \(V = 0.50\, \text{L}\).
Calculate the moles of KI needed by multiplying the molarity by the volume: \(n = 0.20 \times 0.50\).
Interpret the result as the number of moles of KI required to prepare the solution.
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