When salt dissolves in water, which is the solvent

When a sample of atoms is heated and releases light of certain wavelengths, it is called what?

Calculate the specific heat of a metallic element if 31J of energy are needed to raise the temperature of a 50.0g sample from 25.0C TO 50.0c?

1. An atom of silicon has a mass number of 28 and an atomic number of 14. How many protons and how many neutrons are in this atom? Show your calculation.

Which of the following correctly compares the phosphorus isotopes 31p and 32p A. 31p has 16 protons whereas 32p has 17 protons B. 31p has 31 protons whereas 32p has 32 protons C. 31p has 31 neutrons whereas 32p has 32 neutrons D.

Many times, during a chemical reaction, energy is given off. this type of chemical reaction can be termed

2CO + 2NO yields 2CO2 + N2 which element was oxidized

What what is any harm to the physical chemical or biological health of the ocean ecosystem

In what pH range do most biochemical reaction occur

Which formula equation shows a reversible reaction? a. 2Na+F2-> 2NaF b. CaCO3-> CaO+CO2 c. NH4CI (s) - -NH3 ( g.+HCI ( g. 2H2O2 (aq) - pt-> 2H2O (I) + O2 (g)

When a sample of gas is cooled in a sealed, rigid container, the pressure the gas exerts on the walls of the container will decrease because the gas particles hit the walls of the container (1) less often and with less force (2) less often and with