Chemistry, 04.09.2021 05:10 rodriguezscarlet1713
If electromagnetic radiation has a frequency of 2.0×1015s−1, what is the radiation’s energy?(1 point)
3.0 ×1048J
3.0 ×1048J
3.3 ×10−49J
3.3 ×10−49J
1.3 ×10−18J
1.3 ×10−18J
9.9 ×10−41J
9.9 ×10−41J
Answers: 2
Chemistry, 22.06.2019 02:30
Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh
Answers: 2
Chemistry, 22.06.2019 08:30
What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots
Answers: 3
Chemistry, 22.06.2019 14:00
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
If electromagnetic radiation has a frequency of 2.0×1015s−1, what is the radiation’s energy?(1 point...
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