How many moles of atoms in 16g of copper? [elmc-1]
0.25
0.5
0.55
4
How many moles of atoms in 1.6g of sulphur? [elmc-2]
0.02
0.05
0.10
2
What is the likely formula of radium chloride? [elmc-3]
RaCl
RaCl2
RaCl3
RaCl4
What is the likely formula of francium chloride? [elmc-4]
FrCl
FrCl2
FrCl3
FrCl4
What is the likely formula of the chloride formed by combining gallium (Ga) and chlorine? [elmc-5]
GaCl
GaCl2
GaCl3
GaCl4
What is the likely formula of the chloride formed by combining silicon (Si) and chlorine? [elmc-6]
SiCl
SiCl2
SiCl3
SiCl4
What is the expected formula of caesium carbonate? [elmc-7]
Cs2CO3
CsCO3
Cs2(CO3)3
Cs(CO3)2
What is the expected formula of strontium carbonate? [elmc-8]
Sr2CO3
SrCO3
Sr2(CO3)3
Sr(CO3)2
If M represents lithium, what would be the expected formula of lithium oxide? [elmc-9]
M2O
MO
M2O3
MO2
If M represents berllium, what would be the expected formula of beryllium oxide? [elmc-10]
M2O
MO
M2O3
MO2
If M represents gallium (Ga), what would be the most likely formula of gallium oxide? [elmc-11]
M2O
MO
M2O3
MO2
If M represents silicon, what would be the most likely formula of silicon oxide? [elmc-11]
M2O
MO
M2O3
MO2
Which of these is a correct formula? [elmc-13]
Cs(OH)2
BeOH
RbOH
SrOH
Which of these is a correct formula? [elmc-14]
Cs(OH)2
BeOH
Rb(OH)2
Sr(OH)2
If X represents phosphorus (P), which of these is the correct empirical formula for the oxide of phosphorus when it combines with the maximum amount of oxygen ie the formula of its highest oxide? [elmc-15]
X2O5
XO3
X2O7
XO4
If X represents tellurium (Te, atomic number 52), which of these is the correct formula for the oxide of tellurium when it combines with the maximum amount of oxygen ie the formula of its highest oxide? [elmc-16]
X2O5
XO3
X2O7
XO4
If X represents iodine (I), which of these is the correct formula for the oxide of iodine when it combines with the maximum amount of oxygen ie the formula of its highest oxide? [elmc-17]
X2O5
XO3
X2O7
XO4
Which of these is the correct formula for the oxide of xenon (Xe, atomic number 54) when it combines with the maximum amount of oxygen ie the formula of its highest oxide? [elmc-18]
Xe2O5
XeO3
Xe2O7
XeO4
3.55g of chlorine combines with 0.8 g of oxygen. What is the empirical formula of this chlorine oxide? [elmc-19]
Cl2O
ClO
ClO2
Cl2O7
1.95g of potassium was heated in excess oxygen gas. 3.55g of a potassium oxide was formed. What is the empirical formula of the potassium oxide formed? [elmc-20]
K2O
KO2
KO
K2O3
3.75g of arsenic (As, atomic number 33) combines with 1.2g of oxygen. What is the empirical formula of the arsenic oxide formed? [elmc-21]
As2O
AsO
As2O3
As2O5
3.36g of iron was heated in steam to form an iron oxide and hydrogen. If 4.64g of oxide was formed what was its empirical formula? [elmc-22]
FeO
Fe2O3
FeO2
Fe3O4
Which of the following statements is true concerning the Group 2 Alkaline Earth Metals as you descend the group (Be down to Ra)? [elmc-23]
the thermal stability of the carbonate increases
the solubility of the hydroxide decreases
the solubility of the carbonate increases
the reactivity of the metal decreases
Which of the following statements is true concerning the Group 2 Alkaline Earth Metals as you descend the group (Be down to Ra)? [elmc-24]
the thermal stability of the carbonate decreases
the solubility of the hydroxide increases
the solubility of the carbonate increases
the reactivity of the metal decreases
Which of the following statements is true concerning the Group 2 Alkaline Earth Metals as you descend the group (Be down to Ra)? [elmc-25]
the thermal stability of the carbonate decreases
the solubility of the hydroxide decreases
the solubility of the carbonate decreases
the reactivity of the metal decreases
Which of the following statements is true concerning the Group 2 Alkaline Earth Metals as you descend the group (Be down to Ra)? [elmc-26]
the thermal stability of the carbonate decreases
the solubility of the hydroxide decreases
the solubility of the carbonate increases
the reactivity of the metal increases
Which of the following statements is true concerning the Group 2 Alkaline Earth Metals as you descend the group (Be down to Ra)? [elmc-27]
the thermal stability of the carbonate decreases
the solubility of the hydroxide decreases
the solubility of the carbonate increases
the 1st ionisation enthalpy decreases
Which of the electronic transitions represents the 1st line in the 1st series of the absorption spectrum of hydrogen? [elmc-28]
electronic transition 1
electronic transition 2
electronic transition 3
electronic transition 4
Which of the electronic transitions represents the 1st line in the 2nd series of the emission spectrum of hydrogen? [elmc-29]
electronic transition 1
electronic transition 2
electronic transition 3
electronic transition 4
Which of the electronic transitions represents the 3rd line in the 1st series of the emission spectrum of hydrogen? [elmc-30]
electronic transition 1
electronic transition 2
electronic transition 3
electronic transition 4
Which of the electronic transitions represents the 2nd line in the 2nd series of the absorption spectrum of hydrogen? [elmc-31]
electronic transition 1
electronic transition 2
electronic transition 3
electronic transition 4
Which of the following electronic transitions corresponds to the 4th line of the 3rd series in the emission spectrum of hydrogen? [elmc-32]
transition 1
transition 2
transition 3
transition 4
Which of the following electronic transitions corresponds to the 4th line of the 2nd series in the absorption spectrum of hydrogen? [elmc-33]
transition 1
transition 2
transition 3
transition 4
Which of the following electronic transitions corresponds to the 6th line of the 1st series in the absorption spectrum of hydrogen? [elmc-34]
transition 1
transition 2
transition 3
transition 4
Which of the following electronic transitions corresponds to the 4th line of the 1st series in the emission spectrum of hydrogen? [elmc-35]
transition 1
transition 2
transition 3
transition 4
If M represents a Group 2 metal, which equation is correct? [elmc-36]
MO(s) + 2HCl(aq) ==> MCl2(aq) + H2O(l)
M2O(s) + 2HCl(aq) ==> 2MCl(aq) + H2O(l)
MO2(s) + 2H2SO4(aq) ==> M(SO4)2(aq) + 2H2O(l)
M2O(s) + H2SO4(aq) ==> M2SO4(aq) + H2O(l)
If M represents a Group 1 metal, which equation is correct? [elmc-37]
MO(s) + 2HCl(aq) ==> MCl2(aq) + H2O(l)
M2O(s) + 2HCl(aq) ==> 2MCl(aq) + H2O(l)
MO2(s) + 2H2SO4(aq) ==> M(SO4)2(aq) + 2H2O(l)
MO(s) + H2SO4(aq) ==> MSO4(aq) + H2O(l)
If M represents a Group 2 metal, which equation is correct? [elmc-38]
MO2(s) + 4HCl(aq) ==> MCl4(aq) + 2H2O(l)
M2O(s) + 2HCl(aq) ==> 2MCl(aq) + H2O(l)
MO(s) + H2SO4(aq) ==> MSO4(aq) + H2O(l)
M2O(s) + H2SO4(aq) ==> M2SO4(aq) + H2O(l)
If M represents a Group 1 metal, which equation is correct? [elmc-39]
MO(s) + 2HCl(aq) ==> MCl2(aq) + H2O(l)
MO2(s) + 4HCl(aq) ==> MCl4(aq) + 2H2O(l)
MO(s) + H2SO4(aq) ==> MSO4(aq) + H2O(l)
M2O(s) + H2SO4(aq) ==> M2SO4(aq) + H2O(l)
If M represents a Group 2 metal, which equation is correct? [elmc-40]