(3) Zn2CO3
(4) Zn3CO3
B. hydrogen sulfate
C. sulfur hydride
D. sulfuric acid
The compound with the chemical formula (NH4)2S is ammonium sulfide. This name signifies the presence of two ammonium ions and a single sulfide ion in the compound.
The compound with the chemical formula (NH4)2S is ammonium sulfide. In this compound, there are two ammonium ions (NH4) for every sulfide ion (S2-). The positive charge of the two ammonium ions balances the negative charge of the sulfide ion, forming a neutral compound. The prefixes and suffixes in the name of the compound indicate the elements present and their ratios.
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Elements which are arranged in increasing order of atomic radii are F,Cl,Br, I.
Atomic radius is defined as the distance between nucleus of an atom and the valence electrons.In a group, atomic radii increases up to down as electrons are added in the next successive shell which increases the size of atom.
In a period, as electrons are added to the same shell the force of attraction between nucleus and valence electrons increases as a result of which atom tend to shrink resulting in decrease in atomic size.
As fluorine, chlorine, bromine and iodine are present in the same group their atomic size increases as new shells are added from top to bottom of periodic table., while for the elements given in other options they are present in same period or in different group and hence do not show an gradual increase in atomic radii.
Learn more about atomic radius,here:
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Answer: F,Cl,Br,l
Explanation:these elements are all part of group 17
The mass of the compound can be calculated by the molarity. The mass of the calcium bromide in the given solution is 2.5 g.
The mass of the given compound can be calculated by the molarity formula,
Where,
M- molarity of the solution = 0.25 M
w - given mass =?
m -molar mass of Calcium bromide = 200 g/mol
v-volume in mL= 50 mL
Put the values in the formula,
Therefore, the mass of the calcium bromide in the given solution is 2.5 g.
To know more about Molarity,
A. The atomic mass could be used to convert that element into another element.
B. The atomic mass could be used to identify an element.
C. The atomic mass could be used to calculate the number of isotopes formed by the element.