The total number of protons and neutrons in the nucleus is called the

What sources or bodies of water are included in the Earth's water cycle? A. All water on Earth and in Earth's atmosphere is included in the water cycle. B. Only the Earth's fresh water is included in the water cycle. C.

A 20.0g sample of mercury (II) oxide (HgO, M = 216.6) is heated strongly, causing it to decompose to metallic Hg and O2 gas. What volume of O2 gas is produced (measured at STP) (A) 1.03L (B) 2.07L (C) 4.14L (D) 14.0L When 30.0 ml of 0.

What knowledge is radiometric dating based upon? A. the rate of decay for certain isotopes B. the name of the rocks C. the weight of the samples D. the sequence of layers in the rocks

Which process involves mass movement within a substance? a. conduction b. convection c. radiation d. reflection

How does the law of conservation of mass apply to this reaction: Mg + HCl > H2 + MgCl2?

Distinguish between the structures of arteries, capillaries, and venies. what is the function of each.

How much water should be added to 30 l of a 40 acid solution to reduce it to a 30 solution?

For the reaction BaSO3 (s) ↔ BaO (s) + SO2 (g), the equilibrium constant is 0.345 M. What is the concentration of SO2 at equilibrium? A. 0.035 M B. 0.070 M C. 0.280 M D. 0.420 M E. None of the Above

Calculate the molar mass of salicylic acid, c7h6o3.

What is the halflife of a radioisotope if a 20-g sample becomes 10g after 16 hours