What is energy? Give some examples

Explain the difference between a positive ion and a negative ion.

A beaker contains an aqueous solution of sodium acetate (NaC2H3O2) of unknown concentration. A few crystals of sodium acetate are added to the beaker. They sink to the bottom of the beaker and remain there unchanged even after further mixing.

Express the sum of 2222 km and 333 km using the correct number of significant digits. a. 2500 km b. 2550 km c. 2550. km d. 2555 km

If the mass of a material is 111 grams and the volume of the material is 11 cm3, what would the density of the material be?

If salt is dissolved in water, water serves as the: a. solute. b. solvent. c. dissolved medium. d. none of the above

In which orbital does an electron in a bromine atom experience the smallest?

What characteristics of water allow it to have high surface tension?

Obtaining scientific data from a distance is called?

What is organic chemistry?

What is the total number of electrons shared in a double covalent bond between two atoms? (1) 1 (3) 8 (2) 2 (4) 4