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0
votes
Dry ammonia gas was passed over heated copper(II) oxide.
answered
Jul 5, 2021
in
Chemistry Form 3
nitrogen and its compounds
properties
ammonia
0
votes
Study the table below and use it to answer the questions that follow. (The letters do not represent the actual symbols of the elements). Element S P Q R T Atomic Number 5 20 3 18 5 Atomic mass 10 40 7 40 11 Select two letters that represent a pair of isotopes
answered
Jul 5, 2021
in
Chemistry Form 2
structure of the atom
0
votes
Give one negative effect of continuous use of nitrogenous fertilizers
answered
Jul 5, 2021
in
Chemistry Form 3
nitrogen and its compounds
0
votes
Determine the percentage of nitrogen in ammonium nitrate fertilizer (N=14.0, H=1.0,0=16.0 )
answered
Jul 5, 2021
in
Chemistry Form 3
nitrogen and its compounds
0
votes
State two applications of using impurities to lower the melting point of substances.
answered
Jul 5, 2021
in
Chemistry Form 2
patterns
properties
structure
bonding
0
votes
Calculate the volume of carbon(IV)oxide in 9,000 m3 of air contained in a room.
answered
Jul 5, 2021
in
Chemistry Form 2
carbon
0
votes
Why is the percentage of carbon (IV) oxide in the atmosphere fairly constant?
answered
Jul 5, 2021
in
Chemistry Form 2
carbon
0
votes
The standard electrode potentials of a metal H and Iron are given below.
answered
Jul 5, 2021
in
Chemistry Form 4
metals
0
votes
The diagram below shows the energy changes that occur when sodium chloride dissolves in water. Study it and answer the questions that follow.
answered
Jul 5, 2021
in
Chemistry Form 4
acid bases and salts
energy changes
0
votes
Study the equation below and answer the questions that follow. C4H8 + Cl2 C4H8Cl2
answered
Jul 5, 2021
in
Chemistry Form 3
organic chemistry
0
votes
Draw structural formulae of two positional isomers with molecular formula C4H8
answered
Jul 5, 2021
in
Chemistry Form 3
organic chemistry
0
votes
Nitrogen (I)oxide gas can be prepared in the laboratory using a mixture of ammonium chloride solution and sodium nitrate solution.
answered
Jul 5, 2021
in
Chemistry Form 3
nitrogen and its compounds
0
votes
A mixture of two liquids A and B with densities of 2.34g/cm3 and 1.30g/cm3 respectively is to be separated .
answered
Jul 5, 2021
in
Chemistry Form 1
classification of substances
0
votes
Eleza kwa hoja tano udhaifu wa hojaji kama njia ya kukusanya Fasihi Simulizi.
answered
Jul 2, 2021
in
Fasihi
fasihi
fasihi simulizi
0
votes
Jadili mifano mitano ya ngomezi za kisasa.
answered
Jul 2, 2021
in
Fasihi
fasihi
fasihi simulizi
0
votes
Eleza maana ya; Maapizo
answered
Jul 2, 2021
in
Fasihi
fasihi
fasihi simulizi
0
votes
Eleza maana ya; Matambiko
answered
Jul 2, 2021
in
Fasihi
fasihi
fasihi simulizi
0
votes
Eleza maana ya; Vivugo
answered
Jul 2, 2021
in
Fasihi
fasihi
fasihi simulizi
0
votes
Eleza maana ya;Tahalili
answered
Jul 2, 2021
in
Fasihi
fasihi
fasihi simulizi
0
votes
Eleza maana ya; Vitanza ndimi.
answered
Jul 2, 2021
in
Fasihi
fasihi
fasihi simulizi
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