Prominences and flares on the sun can best be described as
a. electrically charged particles
c. cooler areas on the sun
b. the effect of earth’s gravitational pull on the sun
d. auroras
pick the letters above

a. electrically charged particles

Explanation:

The Sun is a medium sized star made up of Plasma. Plasma is the fourth state of matter and consists of electrically charged particles. Solar Prominence and Flares are features on the Sun which occurs due to its differential rotation and magnetic field. In solar flares the magnetic field lines interact with each other and release the plasma in the form of flares. Solar Prominence are loop of plasma suspended over the surface of Sun along the magnetic field lines.

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz