50.0 grams of a pure gaseous compound was found to contain 26 grams of oxygen. What is the percentage by weight of oxygen in this compound?

Answer in units of g.

What is the wavelength of microwaves of 3.0x109 Hz frequency? c = 3.0x108 m/sec

Which of the following is an impact of an increase in motor vehicles in cities?

Writing net ionic equation: of cu with nitric acid

If a 3.30 m sample of a is heated to 500 k, what is the concentration of b at equilibrium?

The process of cell division that creates sex cells reproducing organism is called? A. mitosis B. meiosis C. replication

Hanna hypothesizes that granite is denser than sandstone. How can Hanna test her hypothesis?

It is possible to determine the environment of sedimentation for various sand dunes by

Which change results in the formation of different substances? (1) burning of propane (2) melting of NaCl (s) (3) deposition of CO2 (g) (4) solidification of water

Suppose that a solid cube of some material floats on the surface of an oil puddle at a service station with 75.1 % of its volume submerged. The density of the oil is 923 kg/m 3. What is the density of the cube's material

What is modern periodic table?