Which one of the following is a vestigial structure? 1. Heart 2. Appendix 3. Right leg 4. liver

When like atoms are joined by a covalent bond the bonding electrons are shared?

What is the molarity of a solution in which 58 grams of NaCl are dissolved in 2.0 liters of solution

What of the following is most likely the net ionic equation for the reaction between a strong acid and a strong base?

0.32 g of a walnut is burned under an aluminum can filled with 58.1 mL of water. The water temperature in the can increases by 3.1 °C. How many calories did the walnut release?

What is the periodic table of the elements and how is it used?

What type of forces affects the speed and direction of motion of an object? A: Balanced forces B: Unbalanced forces C: Equal and opposite forces in the vertical plane D: Equal and opposite forces in the horizontal plane

Some ionic compounds do not dissolve in water because ... a) the ionic bonds are too strong to be broken by the attraction of the water molecules b) they float on the surface c) water is a covalent compound so it cant dissolve ionic compouds d)

Which element is humus especially rich in? oxygen carbon nitrogen or tungsten

Vitamins are classified according to A. their ability to fight disease. B. their coenzymes. C. their functions in the body. D. their solubility in water and fat.

What is the concentration of a solution of HCl in which a 10.0 mL sample of acid required 50.0 mL of 0.150 M NaOH for neutralization? What is the concentration of a solution of HCl in which a 10.0 mL sample of acid required 50.0 mL of 0.