How much heat is needed to increase the temperature of 50.3g of water from 25 degrees celsius to 40 degrees celsius? Remember heat of water is 4.189 J/g C

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

Aparticular radioactive nuclide has a half-life of 1000 years. what percentage of an initial population of this nuclide has decayed after 3500 years?

Which ionic equation represents a spontaneous reaction that can occur in a voltaic cell? 1. cu(s) + zn(s) → cu2+(aq) + zn2+(aq) 2. cu(s) + zn2+(aq) → cu2+(aq) + zn(s) 3. cu2+(aq) + zn(s) → cu(s) + zn2+(aq) 4. cu2+(aq) + zn2+(aq) → cu(s) + zn(s)