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?

(urgent)

For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea

How many atoms are there in 5.70 mol of mg

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a. the mitochondria b. the nucleus c. the vacuoles d. the endoplasmic reticulum