Which of the following contains both ionic and covalent bonding?

CH4 NaCl NH4Cl N2O4

If the formula for a compound is represented by X2Y3 and the charge on the Y ion is - 2, what is the charge in the X ion?

+1

+2

+3

+4

Which is a Characteristic of a non elecrolyte

What is the percent by mass of chlorine in NaCi? total mass of element in compound molar mass of compound Use %Element x 100

Which of the following is most likely to cause the particles in a chemical change to slow down A: Raising the thermal energy of the particles B: increasing the rate of the reaction C: Lowering the temperature D: adding heat to the reaction

If you are given the mass number and atomic number of an atom explain how you would find the number of protons neutrons and electrons

A flask contains 0.83mol of neon gas at a temperature of 35°C. The pressure gauge indicates 0.37atm inside the flask. What is the volume of the neon gas?

Explain how a nuclear power plant uses the process of nuclear fission to produce electricity.

Compare and contrast chemical potential energy and elastic potential energy

Which of the answer choices best describes how electrons move, according to modern atomic theory? They vibrate in place. They move like planets. They move in orbitals. They slide past each other.

The total solute concentration of a red blood cell is about 2%. Sucrose cannot pass through a red blood cell's plasma membrane, but water and urea can. Which of the following solutions will cause a red blood cell to shrink? a.

A geologist discovered fossils of marine animals in a layer of sedimentary rock in the desert. Based on this discovery, what conclusion can the geologist draw?