The detection limit for caffeine analysis must be calculated. Eight absorbance readings from a caffeine sample close to the estimated detection limit are 0.1239, 0.1098, 0.1182, 0.1150, 0.1219, 0.1251, 0.1199, and 0.1099. The average absorbance for eight blanks is 0.0182. The slope of a calibration curve is 0.59 /mM. What is the detection limit

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

increased stability in the completion of fluorine's outer shell.

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl