how do I round 0.004198 to 3 sig figs

Q: 2 a and b

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

Q: j. Mn|Mntaq)||Hiag)|H2(9) \Pt

A: Electrochemical cell consist of two half cells i.e oxidation half cell and reduction half cell .…

Q: cal J 7 to

A: The specific heat capacity is the amount of heat required for one gram unit substance to change its…

Q: S° (J/molK) S° AHL (kJ/mol AGE (kJ/mol) AG? (kJ/mol (kJ/mol) | (J/molK) AHE Substance Substance

A: The missing thermodynamic parameter value is to be provided.

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A: Calibration is the method of configuring an instrument so that we can observed a result within an…

Q: 2 (3) Expected IK H HO Но 500 peaks pn 201 shew c bios H

A: IR tells us about the functional groups present in the compound.

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A: Chemical substances are classified into acidic, basic or neutral.  Acidic substances are able to…

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A: Given [Na2S2O3(aq)] = 0.1 M  From mass balance, [S2O32-(aq)] = 0.1 M

Q: lain what is meant by the term 'resolution' in the above statement?

A:

Q: Can you help me solve 19.81?

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Q: Give the drawbacks of J.J. Thomson’s experiment.

A: J.J. Thomson gave the plum pudding model giving the explanation that shape of an atom resembles to…

Q: 267 °F is equivalent to   389 K         116°C         540 K

A: The physical quantity which is used to express hot and cold is Temperature. SI unit of temperature…

Q: Q2: A/ chose from list (B) a suitable answer for list (A) A OFe 1. m 2. Au 3. C12 O to +1 Oa = 2RV2…

A: I have answered the questions as A-B below.

Q: how can i calculate part a

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Can you please answer this question and show the steps

A: Protons carry positive charges, electrons carry negative charges and neutrons have neutral particle.…

Q: use the proper amount of sig figs a. (21.0954×2.76)+327.29 b. (84.8−22.446)÷0.0041

A:

Q: A PPlication of analytical chemistry in Pharmacy sciences .

A: Analytical chemistry is the science of obtaining, processing, and communicating information about…

Q: 1. Br2 Mg SOCI2 КОС(СН)з 1. ВНз Et20 pyr 2. H2O2,OH FeBr3 2. H3O* Br2 КОН 1. Na HNO3 Fe 2. EtBr…

A: All are multi step synthesis reaction . To find out the major final product detail synthetic route…

Q: 26 TH value cEAHo Fortle fermatien of phes pheres trichleride fremits censtituent elenen- P2G)t…

A: The given equation is, P2(g) + 3Cl2(g)→2PCl3(g)

Q: E) Calculate the AHrn given the following data CH4 (g) + 202 (g) → cO2 (g) + 2H20 (g) Substance…

A:

Q: pH pOH 4.2 x 105 A В C 6.8 x 107 E F G 9.54 K L 8.13 ND OFF ANSWERS TO FOUR (4) SIG FIGS. NO NEED…

A: From the formula, pH + pOH = 14 pH = -log([H+]) pOH = -log([OH-)] [H+] = 10-pH [OH-] = 10-pOH

Q: A) sp B) sp² C) sp³ D) sp4

A: Propyne is an alkyne . alkynes have triple bond in it . We can easily find hybridization of Carbon…

Q: i) 1) k) ㄷ q)

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Q: с. [1] Cl2 [2] NaNH2 (2 equiv) d. [1] R,BH [2] Н,0. Но- HC=C- + е. D20 f. H20 H,SO4

A: C.  Alkene reacts with chlorine to form a dichloro compound. The reaction follows an electrophilic…

Q: 4) Does it matter if the coin is heads or tails? Why or why not?

A: Surface tension is the inclination of liquid surfaces to contract into the smallest possible surface…

Q: 7. Consider the following T-z-y and P-z-y diagrams for the binary system methanol-ethlyl acetate…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: NaCN H20 Ме

A: A question based on introduction to organic chemistry that is to be accomplished.

Q: 12.8364 12.7398 11.6023 11.4888 esponse here. Type response here. Type response here. response here.

A: Mass of the compound used = Mass of vial and compound- Mass of emptied vial Mass of sodium chloride…

Q: NO2 + AICOH); -> HzO + Al(NO);"

A: Note : As per the product instead of NO2 it should be HNO3 or HNO2 and I am writing answer the both.…

Q: Does the answer need 2 sig figs or 3?

A: Estimated Value, EV = 2.8 g/cm3  True Value, TV = 2.702 g/cm3

Q: Pls help ASAP. Pls pls pls make sure to inlcude SI units.

A:

Q: AI203 A CO2 AIZ(CO3)3 15 10 10 20

A: From the graph we find that, yellow denotes Al2(CO3)3 . Red denoted =  CO2Blue denoted = Al2O3

Q: Calculate AG°rxn fo

A:

Q: My question is for the part circled in pencil, how do we get -12,970.4 and then -25,940.8 j/mole.…

A: No we are not normalising it twice. There is an error in the calculation. The error is that after…

Q: а. (еxcess) H3O* b. С. H2O ОН ZI + エーZ

A: The question is based on the concept of organic reactions.   We have to identify the product formed…

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A: Coefficient of Species : The number written before the formula of a species ( reactant or product )…

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A: Issues number is given below.

Q: Part 13 Your answer is partially correct. Natural gas is mostly methane, a substance that boils at a…

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Q: Species So NH3 111.3 O2 205.0 CH4 186.1 HCN…

A: The standard entropy change of the reaction is equal to the difference in the standard entropy of…

Q: H, HQ

A: We have given reaction is hydration of alkene to form alcohol The details solution for this…

Q: Describe calibration (it's principles) as used in Analytical Chemistry.

A: Calibration is the process in which it make sure that the instrument will produce correct results.

Q: Cr2* (aq) + 2 e.→ Cr (s) E° = V Pd2* (aq) + 2 e- Pd (s) E° = V

A: 1) the standard reduction potential values for the following half cell reactions is:

Q: Georgia Gwinnett C X A ALEKS - Ciapha Dorley - Learn…

A: The reaction is second order in N2 and second order in H2. The rate law can be written as shown…

Q: are the tables above correct?

A: The cation and anion for NaCl and NH4Br are correct.  But the anion of CuI2 and MnO2 is incorrect.…

Q: a. + SOCI, -> soclz O-H b. + エZー

A: