question archive 1)How many significant figures are in each of the following numbers (assume that each number is a measured quantity)? a) 6
1)How many significant figures are in each of the following numbers (assume that each number is a measured quantity)? a) 6
Subject:ChemistryPrice: Bought3
1)How many significant figures are in each of the following numbers (assume that each number is a measured quantity)?
a) 6.002 × 1023 b) 6000 c) 0.000304
2)Give the structure of
a)Bicarbonate ion b) Ammonium ion c) Copper Sulfate Pentahydrate
3) Complete and Balance Equation:
C2H6O(g) + 3O2(g)
4) When you heated 2.15 g of ZnSO4. 7H2O you found 0.995 g residue in the crucible; Calculate mass of water lost and Mass% of water in the hydrate.
5) If 21.6 mL of 3.0 M phosphoric acid are required to neutralize the sodium hydroxide in 24.0 mL of NaOH solution. What is the molarity of the NaOH solution?
6) The enthalpy of reaction for the combustion of C to CO2 is -393.5 kJ/mol C, and the enthalpy for the combustion of CO to CO2 is -283.0 kJ/mol CO:
(1) C(s) + O2(g) CO2(g) ΔH = -393.5 kJ
(2) CO(g) + O2(g) CO2(g) ΔH = -283.0 kJ
Using these data, calculate the enthalpy for the combustion of C to CO:
(3) C(s) + O2(g) CO(g) ΔH = ?
7) Calculate the number of moles of gas in a sample having 350 ml volume under 2.32 atm pressure kept at a temp of 38 deg C (Given that R = 0.0821 Latm/mol.K)
