Physics, 10.02.2020 20:45 tuchikitacristoyaidi
Hardness is defined as calcium and magnesium ion content. Since most hardness iscaused by carbonate mineral deposits and does not distinguish calcium and magnesiumions, hardness is usually reported as parts per million (ppm) of calcium carbonate(CaCO3, by weight). A water supply with a hardness of 100 ppm contains the equivalentof 100 g of CaCO3 in 1 million g of water or 0.1 g in 1 L of water (or 1000 g of watersince the density of water is about 1 g/mL). For a water supply with a hardness 134 ppm, what is its hardness in mol/L?
Answers: 1
Physics, 21.06.2019 19:30
Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies. molten iron has a density of 7.0g/cm cubed. in its solid state, iron has a density of 8.0g/cm cubed.
Answers: 3
Physics, 21.06.2019 20:50
An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.
Answers: 1
Physics, 22.06.2019 04:00
Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)
Answers: 2
Hardness is defined as calcium and magnesium ion content. Since most hardness iscaused by carbonate...
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