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Question 2 3 pts A 15.0 g sample of hydrated copper sulfate was heated to dryness...
A 15.0 g sample of hydrated copper sulfate was heated to dryness and the new mass measured to be 9.59 g. Calculate the percentage of water in the hydrated crystal with the correct number of significant figures. A) 63% B) 63.3% C) 36.1% D) 45% E) 36%
A 0.551-g sample of hydrated copper(II) sulfate, CuSO4.xH2O, was heated carefully until it had changed completely to anydrous copper(II) sulfate (CuSO4) with a mass of 0.308 g. Determine the value of x. [This number is called the number of waters of hydration of copper(II) sulfate. It specifies the number of water molecules per formula unit of copper(II) sulfate in the hydrated crystal.
Question 12 4 pts A 8.50 g sample of copper metal at 22.0°C is heated by the addition of 155 J of energy. The final temperature of the copper is °C. The specific heat capacity of copper is 0.38 J/gK Hint: q = cx mx AT-cx mx (Tonal - Tinitia) 22 70 090 110
Question 4 1 pts Which of the following mole ratios CANNOT be derived from the reaction 2 502 (g) + O2 (g) + 2 H20 (1) --> 2 H2SO4 (aq) ? 02 mol SO2 2 mol H2SO4 2 mol H2SO4 2 mol O2 0 1 mol O2 2 mol H20 O 2 mol O2 1 mol O2 2 mol H20 2 mol SO2 Question 1 1 pts What do the coefficients in a balanced equation tell us? Mark ALL that...
Question 2 1 pts A 312 g sample of a metal is heated to 294.133 °C and plunged into 200 g of water at a temperature of 31.977 °C. The final temperature of the water is 87.391 °C. Assuming water has a specific heat capacity of 4.184 J/g °C, what is the specific heat capacity of the metal sample, in J/g °C)? Assume no heat loss to the surroundings. Report your response to 3 digits after the decimal.
0/ 1 pts Question 2 During a certain titration, 35.0 mL of 0.175 M aqueous sulfuric acid was required to exactly neutralize 49.0 mL of sodium hydroxide. Determine the molarity of the base. H2SO4 (aq) + 2NaOH(aq) + 2 H2O (0) + Na2SO4 (aq) [balanced] 0.125 M 6.00 x 10 M 0.250 M 0.175 M 0.600 M 2ct Question 6 0/1 pts Calculate the pressure exerted by 5.12 grams of chlorine gas in a 850 mL sealed flask at 27.0°C....