англ 50-100

50) Specify the basic salt

• CaOHS

• CaS

• CaSo₄

• CaHPO₄

• CaO

51) How many lanthanides is available in D.I. Mendeleyev’stable?

• 14

• 104

• 14

• 22

• 85

52) Specify a unit of measure of quantity of substance

• mole

• kg

• g/mole

• g

• mole/l

53) How many atoms three nitrogen molecules

• 6

• 4

• 2

• 3

• 1

54) Calculate the molar weight of hydroxide of ammonium

• 35

• 29

• 30

• 15

• 28

55) Specify the formula of nitrate of ammonium

• NH₄NO₃

• NH₃OH

• NH₄NO₂

• NH₃

• NH₄

56) Finish the equation and specify substance – х:  Ba(OH)2 + H2SO4x +H2O

• BaSO₄

• BaSO₃

• BaS

• Ba₂SO₄

• Ba(SO₄)₂

57) Specify amphoterous hydroxides

• Al(OH)₃; Zn(OH)₂

• Cu(OH)₂; NaOH

• NaOH; KOH

• Cu(OH)₂; Ba(OH)₂

• Ba(OH)₂; Mn(OH)₂

58) Calculate the molar weight sodium dihydrogenorthophosphate

• 120

• 144

• 56

• 75

• 83

59) Specify the formula for smell gas

• CO

• CO₂

• CH₄

• C₂H₂

• O₃