Are the following bonds (a) ionic bonds or (b) covalent bonds? 39. o─h 44. n─h 40. n─o 45. ca─s 41. na─cl 46. c─o 42. c─h 47. f─f 43. mg─br 48. ba─f

Ionic  bond  are  formed  between  a   metal  and  a  non  metal  while  covalent  bonds  are  formed  between  two  non  metals.
        ionic  compounds  include
    Na-cl,  Mg-Br,  Ca-s,  Ba-F  (are  ionic  since their  bond  is  between a  metal  and  non metal)

covalent  bonds  include
 O-H,  N-O,  C-H,  F-F,  N-H ,  C-O,  F-F ( are  covalent  since  their  bond  is  between  two  non  metal

answer: mole of the gas

answer: mole of the gasexplanation:

answer: mole of the gasexplanation: this is because 1 mole of a gas is 22.4dm³, which is use in ideal gas

Each calcium ion has a charge of +2, which can also be written as ca2+. if those ions move out of the neuron and no other ions are moving, the neuron would lose the positive charge associated with those ions and become more negatively charged.