Be sure to answer all parts.

Determine the number of significant figures in each of the following measurements:

(a) 16 ml

(b) 6701 g

(C) 0.0810 m

(d) 5.8 x 106 molecules

(e) 560 kg

How many chromosomes are we born with?

Explain how you can estimate the number of neutrons in the atoms of an element.

What forces are responsible for anticlines and synclines

What gives the atoms of an element their chemical properties?

It is NOT possible for a virus to infect a bacterium. T or F

What is the percent by mass of solute if 14.60g 74.95g of water?

7 An atom that has 13 protons and 15 neutrons is an isotope of the element (1) nickel (3) aluminum (2) silicon (4) phosphorus

The graph below shows how solubility changes with temperature. What is the solubility of Na2HAsO4 at 60°C? 20 g/100 mL of water 46 g/100 mL of water 65 g/100 mL of water 70 g/100 mL of water

Which statement regarding water is true? Energy must be given off in order to break down the crystal lattice of ice to a liquid. Hydrogen bonds are stronger than covalent bonds. Liquid water is less dense than solid water.

Which of the following elements has the fewest valence electrons?. a. beryllium. b. boron. c. carbon. d. lithium