The mass number of an element is equal to

a. the total number of electrons.

b. the sum of the protons and neutrons.

c. less than twice the atomic number.

d. a constant number for the lighter elements.

C6 H12 O6 (aq) is a (an) ? Select one: a. dissolved molecule b. dilute solution c. ion in a crystal d. ion in solution

What does air have to do with light refraction?

2 Which particle has a mass of approximately 1 atomic mass unit? (1) an alpha particle (3) an electron (2) a beta particle (4) a neutron

Does anyone here live in South Carolina and go to k12?

The enthalpies of formation of the compounds in the combustion of methane, , are CH4 (g) : Hf = - 74.6 kJ/mol; CO2 (g) : Hf = - 393.5 kJ/mol; and H2 O (g) : Hf = - 241.82 kJ/mol. How much heat is released by the combustion of 2 mol of methane? Use.

What are some reasons why the research should be put through a peer-review process?

Which of the following examples is a compound containing an ionic bond? A. O2 B. H2O C. CaO D. CH4

How many moles of a gas will occupy 2.50L at STP

Which has more kinetic energy, a small sports car traveling at 30 km/hr or a large tractor-trailer traveling at 75 km/hr?

A Lay's potato chip weighing 4.03g is put into a bomb calorimeter containing 895.5g of water at 25.10°C. If this increases the temperature of the surrounding water to 48.89°C, what is the amount of calories per serving if 1 serving = 28.38g.