40. What is the formula for dinitrogen pentoxide?
Blog
38. What is the name of CO?
38. What is the name of CO?
19. An atom has 11 protons and 12 neutrons. What is its mass…
19. An atom has 11 protons and 12 neutrons. What is its mass number?
15. An atom has 17 protons. What element is it?
15. An atom has 17 protons. What element is it?
37. What is the name of N2O4?
37. What is the name of N2O4?
41. A metal sample has mass 24.6 g and volume 3.15 mL. What…
41. A metal sample has mass 24.6 g and volume 3.15 mL. What is the density (correct sig figs)?
1. Which sample is a compound?
1. Which sample is a compound?
28. Elements in the same group generally have:
28. Elements in the same group generally have:
36. What is the name of Al2O3?
36. What is the name of Al2O3?
2. Which sample is a homogeneous mixture?
2. Which sample is a homogeneous mixture?