17. What is the total number of molecules in a 0.5-mole
sample of He gas?
A) 6 x 10^23
...
Chemistry, 13.11.2020 06:10 dobrzenski8372
17. What is the total number of molecules in a 0.5-mole
sample of He gas?
A) 6 x 10^23
B) 2 x 10^23
C) 3 x 10^23
D) 4 x 10^23
Answers: 1
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According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc
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1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c
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The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
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