Since soap and laundry detergent are less effective in hard water, laundry products tend to include water softeners that remove the hard water ions (Ca2+and/orMg2+) from the water. If the hard water in your home is51ppm(mg solute/Lof solution)Mg2+, what is the concentration of Mg2+after 42 g Na5P3O10is added to your high-efficiency washing machine (which uses 53.0 L per load)? The equation below will be helpful: Mg2+(aq) + P3O105-(aq) ⇋MgP3O103-(aq)
Kf= 4.0 × 108

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

Right anwser gets marked brainliest newton's discovery concerning how fast an object will change speed is the: 1st law 2nd law 3rd law universal gravitation