When 6.65 g of the hydrate NiSO4 • xH2O was heated in a vacuum, the water was driven off and 3.67 g of anhydrous NiSO4 remained. What is the value of x in the formula NiSO4 •xH2O?

Q: How many moles of thiocyanate ion are there in 2.0 ml of 0.00400 M KSCN

A: Volume of solution = 2 ml = 0.002 l Molarity of solution =0.00400 M

Q: Select Draw Rings More Erase C H P 1 CH3CH2OH Но -OH + H20 но — р — он OH он Select Draw Rings More ...

A: Given data :-

Q: Write the balanced equation for the reaction of acetaldehyde with Tollen's reagent. What type of rea...

A: Given :-  Acetaldehyde + Tollen's reagent →  To write :-  Balanced chemical equation  Type of react...

Q: Ihe acid ionization constant for Cu(H20)62+(aq) is 1.0x10-7. Calculate the pH of a 0.0410 M solution...

A: Answer:- Determined the pH of a 0.0410 M solution of cu(NO3)2 by using equilibrium expression.  Here...

Q: For each system listed in the first column of the table below, decide (if possible) whether the chan...

A: Since,  

Q: The rate constant for the first-order decomposition at 45 6.2x 10-4 min-1. what is the rate of the r...

A: • The given first order reaction is,          2N2O5 → 4NO2 + O2    • The values provided in the ques...

Q: Problem 8 C8H14 18- 40 20 4000 3500 3000 25b0 20be 1500 1000 3H 2H 2H 2841.51- 484.16 - 1278.97 1072...

A:

Q: Part A The hydroxide ion has the formula OH. The solubility product constants for three generic hydr...

A:

Q: A student reads a barometer in the laboratory and finds the prevailing atmospheric pressure to be 74...

A: (i) 747 mmhg to atm 760 mmhg = 1 atm 1 mmhg = (1/760) atm 747 mmhg = (747/760)atm = 0.983 atm (ii) 7...

Q: Draw the major monobromination product when the alkane shown is subjected to radical bromination at ...

A: The reaction is a free radical bromination of alkane in presence of light.

Q: Calculate the pH of a solution containing a salt AcNa derived from a strong base (NaOH) and a weak ...

A: Given, the initial concentration of the salt = 1.75 M The salt dissociates as: AcNa → Ac- + Na+ The ...

Q: If 100.0 mL of 0.271 M Na, SO, are added to 100.0 mL of 0.905 M Pb(NO3),, how many grams of PbSO, ca...

A:

Q: 50.00 mL of a solution containing 0.15 M CH2 (CO2 H)2 and 0.020 M MnSO4·H2O Calculate the mass of m...

A: Mass of manganous sulfate monohydrate will be calculated from its number of moles. 

Q: An iron ore has a 55% Fe2O3 with 5% moisture content. What is the Percentage of Fe2O3 in a dry basis...

A: Given,  Iron ore has a 55% Fe2O3 with 5% moisture. 

Q: Select the element, from the second period, with the lowest 1st ionization energy? Select the eleme...

A:

Q: Calculate the percent composition by mass of each element (Pb, C, O) in lead(II) carbonate.

A: Complete solution is given below in next step

Q: (ii) What is the partial pressure of oxygen and nitrogen (in kPa) if they are present at 6.42 mol/m3...

A:

Q: Select all true statements. ANFO explosive ... 1-is more sensitive when density is higher than 1.2g/...

A: A density of 1.2 g/cc will not be achieved by using the prilled product free-poured or tamped. This ...

Q: What is the value of the equilibrium constant for the reaction below if the partial pressures at equ...

A: We have to predict the equilibrium constant.  

Q: Determine the [H3O+] of the eight buffer solutions made by mixing 1.10 M acetic acid and 0.900 M sod...

A:

Q: Let 38 Sr

A: 25096Cm     ------>    ? +    9838Sr    + 4 10 n In this problem,   

Q: Write the net ionic equation for the acid-base reaction. Include physical states. HCIO,(aq)+NaOH(aq)...

A: We have to predict the net ionic equation .  

Q: Give the structure of the benzophenone and triphenyl methanol. Label each set of equivalent sets of ...

A: Equivalent types of proton gives same 1H-NMR spectrum.The no. Of signals in triphenyl methanol and b...

Q: 2.23 Suppose the system of Prob. 2.22 is initially in equilib- rium with P= 1.000 bar and V= 2.00 dm...

A: 2.23 Given:  Pinitial = 1.000 bar Vinitial = 2.00 dm3 Pext = 0.500 bar Vfinal = 6.00 dm3 Since, 1 dm...

Q: How many mL of 0.300 M HCI would be needed to just neutralize 20.0 mL of 0.250 M NaOH?

A:

Q: What is the pH of 0.78 HClO4? 3. Convert 1800 ppm of CuSO4 in percent by mass of CuSO4

A:

Q: 0.361 g of an unknown liquid occupied a volume of 250.0 mL at 758 mm Hg pressure and 100 °C. What is...

A:

Q: Annotate the H-NMR of Triphenylmathanol

A: Given that, comment or annotate the 1H-NMR of Triphenylmathanol, Ph3C-OH. In 1H-NMR, the chemical sh...

Q: Question 12 The standard cell potential for the reaction: A (s) + B2* (aq) = A2* (aq) + B (s) is - 0...

A:   Nernst equation is  Ecell = Eocell - 0.0591/n log Q  Where  Ecell = emf of cell   at equilibrium E...

Q: The Lewis structure of methyl phosphate is shown. Modify the skeletons to show a minor resonance str...

A:

Q: Identify whether each species functions as a Brønsted-Lowry acid or a Brønsted-Lowry base in this ne...

A:  

Q: Noting the curved arrows, draw all the product(s), organic and inorganic, of the following reaction....

A: The given reaction is include of ammonium cation with hydroxyl anion.  

Q: Use the kinetic theory to explain the reason materials are more dense in the solid state than in the...

A: The solution is as follows:  

Q: the ajor organic product of Indicate the ster via wedge-and-dasn bonds, inciuding explicit H and ms,...

A:

Q: How would you prepare the following substances by precipitation? a. PbSO4 b. FeS c. CoCO3 d. Al(...

A:

Q: A deepwell water sample of 100 mL was titrated with 0.010 M EDTA at pH 10 ( with Mg-EDTA pH 10 buffe...

A:

Q: What is the solubility of PbI2 in 0.0426 M Pb(NO3)2 solution? Ksp = 7.9 x 10^9

A: Given, Ksp = 7.9 x 109 Pb2+ =  0.0426 M

Q: How many moles of hydrogen chloride are contained  in a 52,6 g sample of this gas?

A: The moleculer weight of HCl is 36.5 gm/mol That 36.5 gm HCl=1 mol

Q: QUESTION 1 Balance the following equation: CH 3OH v02 --> v H 20 CO 2

A: Balance the following reaction :  _CH3OH + _O2  ---> _H2O  +  _CO2   

Q: If the temperature of an ideal gas that occupies 30 L increases from 200 K to 400 K, what will the n...

A: Given :-  Initial volume of gas = 30 L  Initial temperature = 200 K  Final temperature = 400 K  To c...

Q: 5) (0.5 pts ea; 2 pts total). In chapter 6, we will see that electrophiles (such as H*) tend to add ...

A:

Q: 8. Give a structural formula of the product from the following reaction: - CH, (i) "OH CH,BI (i)

A:

Q: Determine the wavelength of an electron that has a kinetic energy of 1.15 x 10-19 J. Report your ans...

A: Kinetic energy = 1.15 × 10-19 J  Wavelength of an electron (in nm) = ? 

Q: The normal boiling point of water is 100 Celcius and the molar enthalpy of vaporization of water is ...

A: Given, The normal boiling point of water (T1) = 100°C = (273.15 + 100) K = 373.15 K Note: pressure a...

Q: Give the organic product formed by the following sequence of reactions (cyclopentene is starting com...

A: According to your options answer is A, But in product one carbon is missing.

Q: The chlorofluorocarbon C2Cl3F3 has a normal boiling point of 47.6 ºC.  The specific heats of liquid ...

A: Answer of the question given below, 

Q: Calculate the percent composition by mass of each element (C, H, O, P) in methyl phosphate (CH5O4P

A: Determine mass % of each element in methyl phosphate ? 

Q: A chemistry graduate student is given 450. mL of a 1.80M chlorous acid (HCIO,) solution. Chlorous ac...

A:

Q: In a series of experiments on the decomposition of dinitrogen pentoxide, N2O5, rate constants were d...

A: Given, In a series of experiments on the decomposition of dinitrogen pentoxide (N2O5): Rate constant...

Q: True or false? I believe false but want to double check!

A: Given ques is of true false

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.