Are there any answer choices?
Answer:
The volume is 214, 3 ml
Explanation:
We calculate the weight of 1 mol of NH4OH:
Weight 1 mol NH4OH= Weight N + (Weight H) * 5 + Weight 0
Weight 1 mol NH4OH= 14g + 1 g* 5 + 16g = 35 g/mol
1 mol NH4OH-----35 g
0,6mol NH4OH----X=(0,6mol NH4OHx 35 g)/1 mol NH4OH= 21 g
We have 0,6 mol in 1000ml of solution (0,600 M)
21g NH4OH-----------1000ml
4,50 g NH4OH------x= (4,50 g NH4OH x 1000ml)/21 g NH4OH= 214, 2857143 ml
Answer:
- Because it could lead to rise in sea levels which could cause heavy floods in the Small Island States and thus destroy their economies.
Explanation:
The reason is that too much carbon dioxide emissions trapped in the atmosphere can cause global worming which includes climate change and rise in sea levels.
Now, due to the fact that we know islands are lands surrounded by water, a rise in sea level of by as small as 1 metre could be very dangerous to these small islands in that they could cause them to become flooded and thus cause harm to lives and properties thereby damaging their economies.
Answer:
Transition metals like Fe have multiple oxidation states and hence they need to be specified by roman numerals. In contrast, Ba is an alkali metal with a constant +2 oxidation state which need not be specified in the compound names.
Explanation:
Oxidation state of an element can be ascribed to the loss or gain of electrons. Metals in general are electropositive i.e. they tend to lose electrons and form cations.
Iron (Fe) is a transition metal and belongs to the 'd-block' within the periodic table. Transition metals are characterized by the presence of five d-orbitals that are partially filled with electrons of similar energies. Thus for d-block elements there are several electrons that can be removed which results in multiple oxidation states. In the case of Fe the most common oxidation states are +2 and +3. Therefore, for any given compound of iron it is imperative to specify its oxidation state. In this case the compound is Fe(NO3)2 where Fe is in the +2 oxidation state as represented by the roman numeral 'II', hence iron (II) nitrate.
Barium (Ba) in contrast is an alkaline earth metal with a single oxidation state of +2. Any compound of Ba will only exhibit a +2 oxidation state which is assumed to be the case and therefore not explicitly specified, hence Ba(NO3)2 is called barium nitrate and not barium (II) nitrate.