What is the mass of 3.50*10^26 atoms of copper

The nuclei of most atoms contain multiple protons. Each proton has a positive charge. If objects that have like charges repel each other, why do the protons in the nuclei of most atoms not fly apart?

How much energy is added to change 180g of liquid water to gas at 100 degrees Celsius

Which of the following is not a step in balancing redox reactions in acidic solution, using the half-reaction method? A) H2O and OH - are added as needed to the half-reaction equations to make the number of oxygen and hydrogen atoms balance.

For each of the following sublevels, give the n and l values and the number of orbitals: (a) 6g; (b) 4s; (c) 3d.

When 2.3 g of na (s) reacts with excess cl2, how many grams of nacl will be produced?

How much energy is consumed by thawing 4.3 g ice? O A. 4.3 g x 1 mol/18.02 g 6.03 kJ/mol B. 4.3 g x 1 mol/18.02 g x 4.186 kJ/mol C. 4.3 g x 1 mol/18.02g x 40.65 kJ/mol D. 4.3 g x 1 mol/18.02 g * (-285.83) kJ/mol

Identify the product of radioactive decay and classify the given nuclear reactions accordingly.

Alkanes, alkenes, and alkynes are examples of A. aliphatic compounds B. aromatic compounds C. carcinogens

How many molecules of molecular oxygen react with four molecules of NH3 to form four molecules of nitrogen monoxide and six molecules of water?

Element X has an electron configuration that ends with 5p6. Which of the following describes this atom correctly? a. unstable metal b. noble gas c. alkali metal d. unstable nonmetal