The density of a rock is 3.93 g/ml. if the rock is added to 3.42 ml of water, the level of the water rises to 5.29 ml. what is the mass of the rock?

What type of bond is formed between sodium and iodine in sodium iodide (NaI) ? A. ionic B. metallic C. polar covalent D. nonpolar covalent

The half-life of cobalt-60 is 5.26 years. After 10.52 years, 5 grams of a 20-gram sample will remain. true or false?

A rigid tank whose volume is unknown is divided into two parts by a partition. one side of the tank contains an ideal gas at 927°c. the other side is evacuated and has a volume twice the size of the part containing the gas.

Cooking chicken in a oven is physical change or chemical change

What is the Charles law?

Which statements about a neutral atom are correct? Check all that apply. The positively charged particles in the nucleus are positrons. The radius of the electron cloud is twice as large as the radius of the nucleus.

The STP conditions are ... a) 0C and 1 atm b) 0C and 760 kPa C) 0K and 1 atm d) 0K and 760 kPa

Which of these radioactive waste elements would be stored at New Mexico's Waste Isolation Pilot Plant? A) Carbon: C (atomic number 6) B) Lead: Pb (atomic number 82) C) Uranium: U (atomic number 92) D) Plutonium: Pu (atomic number 94)

1. HNO3 will dissociate into: ions with a charge, and, ions with a charge

In the reaction H2CO3 (aq) + 2NH3 (aq) ? 2NH4 + (aq) + CO32 - (aq), which substance is reduced? A. H2CO3 B. NH3 C. NH4 D. CO3 E. None of the Above (This is not a redox reaction.)