Answer: 4. A solution in which methyl orange is red
Explanation:
The others solutions are in their basic form while methyl orange is in it’s acidic form when red.
C.) Copper ( Cu, atomic number) is an element which is malleable as well good conductors of heat and electricity. Hope this helps!
Molar mass:
( Br₂ ) = 159.80 g/mol
AlCl₃ = 133.34 g/mol
<span>2 AlCl</span>₃<span> + 3 Br</span>₂<span> = 2 AlBr</span>₃<span> + 3 Cl</span>₂
2 x ( 133.34) g ------------ 3 x ( 159.80) g
11.95 ------------------------ ( mass Bromine )
mass Bromine = 11.95 x 3 x 159.80 / 2 x 133.34
mass Bromine = 5728.83 / 266.68
mass Bromine = 21.48 g
hope this helps!
If you look at the configuration, you can see that there are less than 18 electrons (count the last numbers). In fact, there is one less than 18: 17. Because 18 is Argon, a noble gas, you can see that you have an element from the 17th group, or Group 7A.
