Find the molarity of a KOH solution if 12ml of 0.3M HCI solution is neutralized by 21ml of KOH solution?

Q: What are ohmic substances?

A: Ohm's law gives the relation between voltage, current, and resistance of the circuit. It states that…

Q: ind Cp for ome mofe of monoatomic cdeal Joss

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Q: Determine the number of molecules present in 0.510 g of CO2

A: No. of molecules = No. of moles x Avogadro's number No. of moles = mass of substance/molar mass of a…

Q: The flux commonly used in brazing is:   A) Ammonium chloride B) Borax C) Zinc chloride D) Resin plus…

A: Brazing is a joining process usually applied to metals in which molten filler metal (the braze…

Q: QUESTION 7 Define Acid ? A substance with pH less than 7 and turns blue litmus red A substance with…

A: Acid and Alkali (base) can be defined as per the below points PH level action with litmus paper.

Q: Which is an example of a mixture? O A. Water O B. Salt O C. Milk O D. Aluminum

A: Mixtures are formed by composition of different substances, such that they possesses the identical…

Q: Solution X has a pH of 9.5, and

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Q: If you know that aluminum has an atomic radius of 0.143nm and an atomic weight of 26.98g / mol |…

A: According to the given question,  Aluminium has an Atomic radius = R= 0.143 nm  Atomic weight =…

Q: A solute with a retention time of 407 s has a width at the base of 13.0 s on a column 12.2 m long.…

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Q: An irregularly shaped piece of metal of density 7.8g/cm3 weighs 429 grams when completely immersed…

A: Archimedes' principle states that when an object is fully or partially immersed in a fluid, it…

Q: Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the…

A: Required : NaCN  salt is acidic or base.

Q: When placed in a pycnometer, 20 g of salt displaces 7.6 g of kerosene. If the mass density of…

A: Given,Mass of salt , msalt = 20 gramMass of kerosene, mkerosene = 7.6 gramMass density of kerosene,…

Q: Lower levels of pH indicate a more acidic solution. If the pH of solution A is 3.3 and the pH of…

A: Given information: The pH of solution A is 3.3 The pH of solution B is 5.7

Q: How many moles are in 12.2 g of copper sulfate

A: Mass of Copper sulfate , m = 12.2 g To find = Number of Moles .

Q: A balloon is filled with a 15% salt/ 85% water solution. Explain what will happen to the balloon if…

A: For this we need to learn about hypotonic solution and it's affect on the inner concentration.

Q: Discuss electrolytes and nonelectrolytes in a solution.

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Q: How many grams of sorbitol solution having a specific gravity of 1.285 and ho many grams…

A: How many grams of sorbitol solution having a specific gravity of 1.285 and how many grams…

Q: adioactive substance has a half life of 30 minutes. How much of a sample of this substance will not…

A: Given, No = 100%= 1 T= 30min t= 2.5 hours = 150 min We know that, N= No (1/2)t/T

Q: What is the concentration of a solution obtained by diluting 30 mL of a 45% w/v solution to a final…

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Q: What is the pH of a solution containing 9 gram of HCl (MW 18 am) dissolved in 50 ml of water? Show…

A: number of moles = mass /molar mass    For HCl mass = 9 gm  Molar mass =36.5 g/mol  And volume 50ml…

Q: How many oxygen atoms are in 32 moles of CO2?

A: Each mole of CO2 contains 2 moles of oxygen. 1 mole of any substance contains 6.023×1023 units of…

Q: By using phenolphthalein as indicator ( in titration of hydrochloric acid with sodium carbonate )…

A: By using phenolphthalein as indicator (in titration of hydrochloric acid with sodium carbonate )…

Q: 2. Calculate the freezing point depression of a solution containing 0.125 mol of a non- electrolyte…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: an irregularly shaped piece of metal of density 7.80 g/cm^3 weighs 429g when completely immersed…

A: Given : dA=7.80 g/cm3              m=429g            (apparent weight)              dn=1.2 g/cm3 As…

Q: . The concentration of drug X in aqueous solution drops by 10% per month when stored at room…

A: The rate law or a rate equation for a chemical reaction is an equation that relates the forward…

Q: Compare this value with a standard value. Compute the percent difference between the two and discuss…

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Q: Gold occurs in seawater at an average concentration of 1.1102 ppb. How many liters of seawater…

A: Given- Average concentration of the gold in seawater =1.1×10-2 ppb Density of seawater =1.025 g/mL 1…

Q: Calculate for the final boilir aqueous solution of KBr. The b water is 0.512 °C kg mol·1, anc…

A: We have givenAqueous solution of KBr (M)= 2.70 MBoiling point constant (k)= 0.512 °C Kg mol-1and…

Q: How many curies are produced by 1.0 mol of 40K (t1/2=1.25x109yr)? How many becquerels?

A: Determine the decay constant for the 40K as follows. k=0.693t12=0.6931.25×109 yr=0.6931.25×109 yr365…

Q: Choose the correct number of molecules in a mole of: Gold VChoose... 197 Water 6.02 x 10 23 18…

A: To find:  the number of molecules in a mole of different elements or compounds

Q: . The freezing point depression of a solution of glucose (C,H,206, molar mass = 180.0 g/mol) is…

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Q: Find the number of moles of chlorous acid in 452 g of chlorous acid.

A: The molecular formula of chlorous acid is HClO2. The molecular weight of this acid is,…

Q: 10g of K2SO4 is dissolved into 1000g of water. The freezing point of the solution is -.0.29 degrees…

A: Van't Hoff factor (i) is the measure of degrees of dissociation/association of a compound. i =…

Q: much water should be evaporated from 900g of 40% solution to increase the strength to 90%?

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Q: Give a reason why soda drinks should be in plastic bottles rather than in aluminum cans?

A: A typical soda drink may contain acids like citric acid which can react with metallic containers and…