Answer: I think it would be -23
Explanation:
(i) Hydrogen chloride gas is prepared by treating Sodium chloride with concentrated sulphuric acid. The HCl gas is passed through a drying agent to remove moisture where concentrated sulphuric acid plays the role of dehydrating agent as well.
(ii) NaCl+H2
SO4 →NaHSO 4
+HCl(g)
Hope it helps :)
Answer:
Explanation:
As per the law of conservation of mass all the mass of carbon present in the hydrocarbon weighing 112 g is present in the 328.5 g of carbon dioxide produced when the hydrocarbon was burned in air.
<u>1) Calculate the mass of carbon in 328.5 g of carbon dioxide</u>:
- Chemical formula of carbon dioxide: CO₂
- Molar mass of CO₂: 12.011 g/mol + 2 × 15.999 g/mol = 44.009 g/mol
x / 328.5 g CO₂ = 12.011 g C / 44.009 g/mol ⇒ x = 86.65 g C
<u>2) Calculate the percent mass of carbon:</u>
- % = (mass of carbon / mass of carbon dioxide) × 100 =
= (89.65 / 112) × 100 = 80.04%
Round to three signifcant figures: 80.0%.
True. A mole of anything has the same amount of molecules. 1 mole = 6.022 x 1023 molecules
