How many grams of a stock solution that is 87.5 percent h2so4 by mass would be needed to make 275 grams of a 55.0 percent by mass solution? show all of the work needed to solve this problem.

How many atoms are there in 5.70 mol of mg

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied