Chemistry, 28.02.2021 06:10 emmaccanttlon
Mammals use their lungs to provide oxygen for themselves from the air. Fish spend a majority of their time in the water, and instead, developed gills. What is the function of gills? * Answer please
Answers: 2
Chemistry, 22.06.2019 12:00
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
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
Chemistry, 22.06.2019 14:00
What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?
Answers: 3
Chemistry, 22.06.2019 16:50
Assuming complete dissociation of the solute, how many grams of kno3 must be added to 275 ml of water to produce a solution that freezes at -14.5 c? the freezing point for pure water is 0.0 c and k_f is equal to 1.86 c/m
Answers: 3
Mammals use their lungs to provide oxygen for themselves from the air. Fish spend a majority of thei...
Mathematics, 07.04.2020 17:38
Mathematics, 07.04.2020 17:38
Arts, 07.04.2020 17:39
Mathematics, 07.04.2020 17:39
English, 07.04.2020 17:39
Mathematics, 07.04.2020 17:39
Computers and Technology, 07.04.2020 17:39