a) A sample of argon occupies 100L at standard temperature. Assuming constant pr
ID: 562260 • Letter: A
Question
a) A sample of argon occupies 100L at standard temperature. Assuming constant pressure, what volume will the gas A) 50L occupy if the temperature is halved? B) 100L C) 200L D) 300L b) The number of moles of hydrogen in 33.6 L of hydrogen at STP is c) In the reaction : AgNO3(aq) + NaCl(aq) AgCl(s) + NaNO3(aq), the ions which are d) A gas sample contains 4.00g of CH4 and also 2.00g of He, the volume of the sample at e) 4.00 L of a gas is measured at 27 C. What volume wil it occupy at-23°C. f) If 4.00g of Mg reacts completely with 150. mL of HCl solution, what is the A) 1.00 B) 2.00 C) 0.200 D) 1.50 NOT spectators: A) Na, NO, B) Ag', NO,C) Na, CI D) Ag, Cr A) 16.8L A) 1670 ml B) 11.2L C) 28.0L D) 22.4L STP is: B) 1250 ml C) 8330 ml D) 3330 ml molarity of HCl solution? A) 1.10M Mg(s) + 2HCI(aq) MgCl2(aq) B) 1.65M H2(g) C) 3.29M D) 2.19M g) When some of the sugar added to iced tea remains undissolved at the bottom of the glass, the solution is A) dilute B) non polar C) unsaturated D) saturated h) How many moles of CaCl2 are in 250 mL of a 8.0M CaClh solution? i) What is the molarity of a solution that contains 8.5g of NH3 in 0.50L of the solution? 2a) Given the reaction: Mg(s) + 2HCl(aq) MgCl2(aq) +H2(g) A) 2.0 moles B) 0.75mole C) 1.5moles D) 2.5moles A) 34 M B) 2.0 M C) 4.0M D) 1.0M When 75.0 g of Mg reacts, how many liters of H2 gas are formed at STP? (4 Points) b) A gas occupies 1.24L at STP. Find the volume it will occupy at 21°C and 1.21 atmospheres. (4 Points)Explanation / Answer
1)
a) at constant pressure
V2/V1 = T2/T1
V2 / 100 = T2 / 2T2
V2 = 50
so
the answer is A) 50 L
b)
number of moles at STP = volume / 22.4 L = 33.6 / 22.4
number of moles at STP = 1.5 mol
so
the answer is D) 1.50
c) D) Ag+ , Cl-
d)
volume of the sample = [(4/16) + (2/4) ] x 22.4 L
volume of the sample = 16.8 L
so
the answer is A) 16.8 L
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