Carry out the following mathematical operations, expressing your answer to the correct number of significant figures/decimal places. (78.4 44.889) 0.87

Q: electronegative

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Q: `CH3 H `CH3 :Z-I

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A: To explain: How many valence electrons does hydrogen need to complete its shell.  

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Q: At 500°C, and in the presence of a catalyst, steam (water vapour) reacts with carbon to give a mixtu...

A: Given: Steam reacts with carbon to give hydrogen and carbon monoxide. Initial temperature = 500 oC =...

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Q: CH2CH3 CH;CHCH2CH,CHo The IUPAC name is

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Q: 2. Mention the IUPAC name of the following compounds. b) а) d) e) f) OH ZI

A: The IUPAC name of the following compounds are:  

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A: Enthalpy of the hydrogenation is endothermic because more bonds are formed. 

Q: .How many types of hardness Two. O Three. O Four. O

A: There are two types of hardness, Temporary hardness Permanent hardness

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A: A faster reaction should have lowest activation energy. 

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Q: (NH,)OH HCI sodium fluoride lithium bromide ammonium sulfate calcium nitrate magnesium phosphate pot...

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A: Given : Volume of CH4 = 28.8L

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Q: ng complex ions.

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Q: Vị V2 Charles' Law: Ti(K) Question #3 An ideal gas at 453.9°C and 550.0 mmHg is contained in a flexi...

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Q: How many mL of 0.300 M NaCl solution are required to produce 0.210 moles of NaCl?

A: No. Of moles=molarity*volume Hence, 0.210=0.3*V.                   V= 0.7 L  

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Q: 5. The chemical reaction presented below is not balanced. Balance it and calculate and for this reac...

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Q: C: Determination of K, for a Weak Acid Volume Used(Liters) Moles 0.0269 (L) HC,H,O, [NaC,H,O,] C.1M ...

A: Ka and pKa are indicative of acidity of a acid. For weak acid we can calculate pKa value using Hende...

Q: Write all the possible resonance structure(s). Show the movement of electrons by drawing arrow(s). I...

A: Resonance structure :- All the individual different possible contribution of structure of any molecu...

Q: 50.00 mL of 1.00 M HC,H,O, (K, = 1.8 x 10) is titrated with 1.00 M NaOH. What is the pH solution aft...

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Q: H3C H, NHCH3 NHCH3 H H

A: In Newman projection, front carbon is shown by a dot while the back carbon is shown by circle. 

Q: The reaction C(s) + 2 H, (g) = CH,(g) has Kp = 0.263 at 1000. K. Calculate the total pressure at equ...

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Q: 8.00 mL of 9.00 x 10-3 M Fe(NO3)3 (9.00 times 10 to the minus 3rd power M F e (NO3)3) is added to 5....

A: Volume of Fe(NO3)3 = 8ml Concentratio of Fe(NO3)3 = 9×10-3M Volume of KSCN = 5ml Concentratio of KSC...

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.