Describe how you would prepare 250 ml of 0.20M Nacl using a 1.0 M stock solution of Nacl and distilled water

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

What is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2