ACS Gen Chem 1 Exam Questions and Answers | 100% Pass

ACS Gen Chem 1 Exam Questions and Answers | 100% Pass The molecule ::O=C=:N-H has been detected in gas clouds between stars. The predicted C-N-H bond angle is about 90 109 120 180 - ️️ Correct-120 When the carbon-carbon bonds in ethane (C2H6), ethane (C2H4), benzene (C6H6), are arranged in order of increasing length (shortest bonds first), what is the correct order? C2H6 < C2H4 < C6H6 C2H4 < C2H6 < C6H6 C6H6 < C2H4 < C2H6 C2H4 < C6H6 < C2H6 - ️️ Correct-C2H4 < C6H6 < C2H6 A sample of a compound of xenon and fluorine contains molecules of a single type; XeFn, where n is a whole number. If 9.03 x I0²⁰ of these XeFn molecules have a mass of 0.311g, what is the value of n? TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD OWNER: EMILLYCHARLOTTE COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED FIRST PUBLISHED: SEPTEMBER 2024 2/7 2 3 4 6 - ️️ Correct-4 In acidic solution, the dichromate ion, Cr₂0₇²⁻ (aq) will oxidize Fe² + to Fe³⁺ and form Cr³⁺. This net ionic equation represents the reaction that takes place during the reaction. Cr₂0₇²⁻(aq)+ 6Fe²⁺(aq) + 14H⁺(aq)→ 2Cr³⁺(aq) + 6Fe³⁺(aq)+7H₂0(l) What volume of 0.100 M Cr₂0₇²⁻(aq) is required to oxidize 60.0 mL of 0.250 M Fe²⁺(aq)? 25.0 mL 42.0 mL 58.4 mL 175 rnL - ️️ Correct-25.0 mL Which set of temperature and pressure conditions will cause a gas to exhibit the greatest deviation from ideal gas behavior'! 100 °C and 4 atm 100 °C and 2 atm TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD OWNER: EMILLYCHARLOTTE COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED FIRST PUBLISHED: SEPTEMBER 2024 3/7 -100 °C and 4 atm 0 °C and 2 atm - ️️ Correct--100 °C and 4 atm A student mixes 100 mLof 0.50 M NaOH with 100 mL of 0.50 M HC1 in a Styrofoam.® cup and observes a temperature increase of ^T₁• When she repeats this experiment using 200 mL of each solution, she observes a temperature change of ^T₂ • If no heat is lost to the surroundings or absorbed by the Styrofoam cup, what is the relationship between ^T₁ and ^T₂? △T₂=4△T₁ △T₂=2△T₁ △T₂=0.5△T₁ △T₂=△T₁ - ️️ Correct-△T₂=△T₁ When a material in the liquid state is vaporized and then condensed to a liquid, the steps in the process are, respectively, exothermic and exothermic. exothermic and endothermic. endothermic and exothermic. endothermic and endothermic. - ️️ Correct-endothermic and exothermic. Calculate ^H for this gas phase reaction. TITLE: EMILLYCHARLOTTE 2024/2025 ACADEMIC PERIOD OWNER: EMILLYCHARLOTTE COPYRIGHT STATEMENT: ©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED FIRST PUBLISHED: SEPTEMBER 2024 4/7 NH₃(g)+ Cl₂(g) → NH₂Cl(g)+ HCl(g) Bon Energies, kJ∙mol⁻¹ N-H 389 H-C1 427 N-C1 201 C1-C1 243 -632 kJ -188 kJ +4 kJ +431 kJ - ️️ Correct-+4 kJ Use the bond energies in the table to determine ^H for the formation of hydrazine, N₂H₄, from nitrogen and hydrogen according to this equation. N₂(g) + 2H₂(g)→N₂H₄(g) Bond Energies, kJ∙mol⁻¹ N-N 159 H-H 436 N=N 201 H-N 389