The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. what is the atomic mass of sodium?

What coefficients would balance the following equation? __Al + __O2 → __Al2O3 Question 4 options: (A) 2Al + 3O2 → 1Al2O3 (B) 2Al + 3O2 → 2Al2O3 (C) 3Al + 3O2 → 2Al2O3 (D) 4Al + 3O2 → 2Al2O3

If the absolute temperature of a gas is quadrupled, what happens to the root-mean-square speed of the molecules?

Analysis of a sample of a covalent compound showed that it contained 14.4% hydrogen and 85.6% carbon by mass. what is the empirical formula for this compound?

If you have 8.29 moles of O2 how many moles of H2O can be produced?

Which of the following statements is not correct? 0.20 mole of O2 = 6.4 g 0.75 mole of H2CO3 = 47 g 3.42 moles CO = 95.8 g 4.1 moles Li2O = 94 g

Student follow up The ionic equation for the reaction between zinc and sulfuric acid is. Zn (s) + 2H (aq) - - Zn" (aq) + H2 (g) a State what has been oxidised in this reaction. Explain your answer in terms of electrons.

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?