Determine pH for a solution containing 0.7 M HBr and 1.4 M HC₃H₅O₂.

How would you prepare a 1.50 molal solution of sucrose in water? At what temperature would the solution begin to boil?

thank you

You are asked to prepare 1.1L of a HCN/NaCN buffer that has a pH of 9.77 and an osmotic pressure of 1.97atm at 298 K.

What masses of HCN and NaCN should you use to prepare the buffer? (Assume complete dissociation of NaCN.)

......... I put in ( 1.09 ) and ( 1.09 ) but it says its incorrect,,,,, Please Help!!

Part B

115. ft to cm

Express your answer using three significant figures.

Part C

1740. kg to lb

Express your answer using four significant figures.

Part D

835 yd to km

Express your answer using three significant figures.

What are open tubular columns and give some differences between open tubular column and packed column

Discuss differences in ordering of the aluminum in the tetrahedral site of each of the potassium feldspars and how this is reflected in the crystal system of each. What is ordering in this context?

Methanol’s toxicity is related to the way the body metabolizes it. Describe what happens and what the effects of exposure to methanol are?

Give the IUPAC name for the following compound:

Part A) Balance the following using the ½ reaction method

Permanganate ion plus bromide ion yields manganese oxide and BrO3 -      (basic solution)

Part B) Given the following data and using Hess’ Law, Calculate change in Enthalpy for the reaction

Overall reaction :     NO(g)   + O (g)   ------→ NO2(g)

                               2O3(g)    ------→ 3O2(g)                                   ∆H = - 427 kJ

                           O2(g)     ------→ 2O(g)                                  ∆H = 495 kJ

                            NO(g)   + O3 (g)   ------→ NO2 (g) + O2 (g)      ∆H = - 199 kJ

At a particular temperature the equilibrium constant for the reaction: H2(g) + F2(g) ⇔ 2HF(g) is K = 81.0. A reaction mixture in a 10.00-L flask contains 0.25 moles each of hydrogen and fluorine gases plus 0.37 moles of HF. What will be the concentration of H2 when this mixture reaches equilibrium?

It is written as 3.0 M HCl. What does the “M” mean for “3.0 M HCl”?

In the reaction, bubbles form which indicates that the reaction is going. What are those bubbles of gas made of?

What is the purpose of heating up the reaction mixture?

Why would not add too much HCl to the reaction mixture?

A) For Gorilla glass, Xensation, Sapphire glass, and Dragontrail glass, tabulate their composition, how they are made and processed, their hardness, strength, and cost.? Please, no English (Merican) units.

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Answer the question in clear words and in very good description!!! Please type your answer. Thanks

You prepare 50 mL of 50 mM HEPES buffer at pH 7.4. Indicate the amounts of each of the following reagents you would use (if applicable)?

HEPES ______(g); 10 M NaOH______(mL); 1 M HCl________(μL)

Consider the following balanced equation.
SiO 2 (s)+3C(s)→SiC(s)+2CO(g) Complete the following table, showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the other reactant, as well as the moles of each product formed. If the number of moles of a product is provided, fill in the required amount of each reactant to make that amount of product, as well as the amount of the other product that is made.

Complete each row.

1) When 2.69g of a nonelectrolyte solute is dissolved in water to make 655 mL of solution at 23 C, the solution exerts an osmotic pressure of 877 torr.

What is the molar concentration of the solution?

How many moles of solute are in the solution?

What is the molar mass of the solute?

2) Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6

At 25 ∘C, the vapor pressure of pure benzene is 100.84 Torr. What is the vapor pressure of a solution made from dissolving 12.9 g of biphenyl in 25.3 g of benzene?