2 g of magnesium are reacted with excess
dilute acid according to the equation
Mg(s) + 2...
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2 g of magnesium are reacted with excess
dilute acid according to the equation
Mg(s) + 2H+ (aq) + Mg(aq) +H2(g)
(Relative atomic mass of Mg = 24, molar
volume at room temperature and pressure=
24 dm3)
The volume of hydrogen, measured at room
temperature and pressure, that is producedis
(A) 1 000 cm
(B) 1 500 cm
(C) 2000 cm
(D) 24000 cm
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Chemistry, 23.06.2019 00:00
Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3
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