For each of the following data sets find the range and the standard deviation. a) The measured concentration of a sodium hydroxide (NaOH) solution: 0.01003, 0.01002, 0.00993, 0.01019, and 0.01008 M.
b) The percentage of iron determined to be in an ore sample: 21.7, 18.3, 17.0, and 20.0%.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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