Answer:
Option A. (Be)
Explanation:
Beryllium is used in alloys with copper or nickel to make gyroscopes, springs, electrical contacts, spot-welding electrodes and non-sparking tools.
Answer:
193.07 g / mol
Explanation:
Molar mass of (NH₄)₃ = 3 * (14.01 + 4 * 1.01) = 54.15
As = 74.92 and O₄ = 4 * 16 = 64
Answer is 54.15 + 74.92 + 64 = 193.07
Answer:
A metal M readily forms water-soluble sulphate MSO4, water-insoluble hydroxide M(OH)2 and oxide MO. The oxide and hydroxide are soluble in NaOH. The M is:
Answer:
(a) barium chloride : BaCl₂ [the cation is barium and anion chloride]
(b) magnesium-nitride
: Mg₃N₂ [Mg is cation and N anion]
(c) sulfur dioxide
: SO₂ [ S is cation and O anion]
(d) nitrogen trichloride : NCl₃
(e) dinitrogen trioxide
: N₂O₃ [two nitrogens and three oxygen]
(f) tin(IV) chloride : SnCl₄
Explanation:
The formula of a compound comprises of the symbol of all the elements.
The element or ion having positive charge is written first followed by anion.
The number of any element is represented as subscript in the formula.
(a) barium chloride : BaCl₂ [the cation is barium and anion chloride]
(b) magnesium-nitride
: Mg₃N₂ [Mg is cation and N anion]
(c) sulfur dioxide
: SO₂ [ S is cation and O anion]
(d) nitrogen trichloride : NCl₃
(e) dinitrogen trioxide
: N₂O₃ [two nitrogens and three oxygen]
(f) tin(IV) chloride : SnCl₄