would you guys help me answer this! i don’t understand what i’m doing at all i’m so confused, HOW DO U GET THE 58.3? please help! i’ll mark brainliest!!

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

Name the element in group 17, period 2. (periodic table)