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Consider 1.00 L of the buffer system that contains 0.200 M hydrocyanic acid (HCN ) and 0.150 M sodium cyanide (NaCN ). The pKa of hydrocyanic acid is 9.31. What is the [ HCN ] after 0.020 mol of HCl is

Shadowf asked Dec 27, 2024

by Shadowf

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I need help please. Anything helps

Mohamed Wagih asked Dec 27, 2024

by Mohamed Wagih

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1 vote

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How many significant figures there are in the number 230mL

Rmcsharry asked Dec 27, 2024

by Rmcsharry

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How many atoms are in 0.28 moles of Beryllium (Be)?

Mike Christianson asked Dec 27, 2024

by Mike Christianson

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Among the following compounds, which one is found in RNA? a) Adenine (A) b) Biotin (B) c) Cytosine (C) d) Deoxyribose (D)

Piobab asked Dec 27, 2024

by Piobab

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For the reaction, A(g) ⇋ 2B(g), Kc=7.0K. A reaction mixture at equilibrium contains [A] = 4.2M. What is the concentration of B in the reaction mixture?

Joanne asked Dec 27, 2024

by Joanne

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Elemental sulfur (1.256 g) is combined with fluorine, Fz' to give a compound with the formula SF, a very stable, colorless gas. If you have isolated 5.722 g of SF what is the value of x? Select one: a.

Joshua Bell asked Dec 27, 2024

by Joshua Bell

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2 votes

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Consider the equation CH₄ + O₂—> 2H₂O + CO₂ Which element or elements are unbalanced in this equation? A)C, H and O are all unbalanced B)Both H and O are unbalanced C)Only the H is unbalanced D)Only the

Mikejoh asked Dec 27, 2024

by Mikejoh

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How can the BORA cooktop extractor be cleaned?

Nopileos asked Dec 27, 2024

by Nopileos

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168k views

In general, a large group in an axial position on a cyclohexane ring will be a. Lower in energy than in an equatorial position b. Higher in energy than in an equatorial position c. Equally distributed

Ajay Yadav asked Dec 27, 2024

by Ajay Yadav

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What is the correct whole number coefficient of chlorine? A. 0 B. 1 C. 2 D. 3

Der asked Dec 27, 2024

by Der

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Why do we need to separate different components of a mixture? Give two examples.

Puneet Kushwah asked Dec 27, 2024

by Puneet Kushwah

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A solution containing 75.0 ml of 0.150 m hcl is titrated with 75.0 ml of 0.300 m naoh. what is the ph of the resulting solution?

DanHabib asked Dec 27, 2024

by DanHabib

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Identify the best answers to complete the sentence. "Enzymes are ______ which work best while at ______ pH or even temperature." A. Chemical substances, moderate B. Biological catalysts, optimum C. Organic

Eric Ryan Harrison asked Dec 27, 2024

by Eric Ryan Harrison

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What is the purpose of the methyl group in the chlorophyll a molecule?

Dmytro Danevskyi asked Dec 27, 2024

by Dmytro Danevskyi

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Water moves up a plant because of hydrogen bonds by a process called __________. (A) covalent interactions (B) cohesion (C) adhesion (D) surface tension (E) cohesion and adhesion

Vlad Mysla asked Dec 27, 2024

by Vlad Mysla

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What volume of 0.0557 M Sr(OH)2 solution is required to neutralize 36.4 mL of a 0.0750 M of HNO3 solution. a 36.4 mL b 49.0 mL c 98.0 mL d 24.5 mL

Vikramjb asked Dec 27, 2024

by Vikramjb

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5. Use the bond energies provided to estimate AH°rxn for the reaction below. Show your work XeF2+2 F2 - XeFg AHºrxn-? Bond Xe-F F-F Bond Energy (kJ/mol) 147 159

DNN asked Dec 27, 2024

by DNN

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A chemical has spilled on a student in the shop. What is the name of the document that outlines the first aid action needed? A ASE B RSD C SDS D UPS

TxAg asked Dec 27, 2024

by TxAg

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Cars run on gasoline, where octane (C8H18) is the principle component. This combustion reaction is responsible for generating enough energy to move a vehicle, or do other work. How much CO2 and H2O (in

Yaritza asked Dec 27, 2024

by Yaritza

7.7k points

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5 votes

65.1k views

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