ml of00758 M CHICH2F How may moles of CHyCHP are contained lo 548 a.432×10-2mol

Question

ml of00758 M CHICH2F How may moles of CHyCHP are contained lo 548 a.432×10-2mol h 69510-2 mol c. 232 102 mol e 526 102 mol 5) What is the empirical ormula for CalladOs? a. CHO2 6) Expressing a number in scientifie notation remmoves ambiguity as to the signifieant figures b. allows to increase the number's precision e. changes its value d. removes significant zeros e all of the above What is the smallest whole number coefficient for 7) sodium hydroxide when the following equation is balanced? b. 2 d. 4 8) What is the chemical formula for iron (I) sulfate? a. Fe s c. Fe(SO4) d. Fe(S04) 9) The following statements apply to the interpretation of chemical equations. Not all of the statements are true. Which statement is false? a. The total number of grams of the reactants must equal the total number of grams of products in a baland equation. b. There will typically be some of the excess reagent left at the completion of the reaction. c. The following equation for the reaction involving hypothetical substances, A, B, C, and D, implies tha the products C and D are always produced in a three to one mole ratio. A+2B3C+D The equation shown in C implies that in any reaction involving A and B as reactants, A must be the limiting reactant. The total number of atoms in the reactants that react must always equal the total number of atoms in d. e. products produced by the reaction.

Explanation / Answer

Answer:

4) given that

molarity of CH3CH2F = 0.0788 M

volution of CH3CH2F solution = 548 ml = 0.548 litre.

we know that molarity = moles of solute (CH3CH3F) present in solution/volume of solution in a liter.

So, 0.0788 = mole of solute / 0.548

moles of solute = 0.0788 * 0.548

moles of solute ( CH3CH2F ) = 0.04318

moles of CH3CH3F = 4.32 * 10^-2 moles

5) empirical formula - simplest ratio of elements present in given compound

given compound C12H24O6, ratio - 12:24:6

empirical formula - C2H4O, simplest ratio - 2:4:1

c option is correct

6) E option is correct ( not sure)

7)

balance chemical equaation is -

3Na2SO4 + 2 Al(OH)3 --------------> Al2(SO4)3 + 6 NaOH

So, cofficient of NaOH is 6

E option is correct

8) iron(III) sulfate - iron has +3 (Fe+2) oxidation state and sulfate - SO4-2

so chemical formula Fe2 (SO4)3

C option is correct

9) B option is correct, reagent generally used as a catalyst which helps to reaction to proceed forward. it does not consume or produce.

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