A 1.0 m³ tank, initially filled with 103. kPa, 300. K air, is connected to a source of air at 1,500. kPa, 300. K. The tank slowly fills until it is at the same pressure. If the temperature is maintained at 300. K throughout this transient process, what is the total heat transfer required? (You can assume air is an ideal gas.)

A 10.0-g sample of solid NH4Cl is heated in a 5.00-L container to 900.

N3-, ClO4-, TeO3, Cl20, CO32-, C2H4Cl2, C2H4, P4,

For the following compounds, please identify

1) How many lone pairs it possess

2) What is the shape about the central atom?

3) Is the molecule polar?

4) How many isomers or resonance structures (apart from the original) does the compound possess?

For each bond, show the direction of polarity by placing a + sign next to the atom expected to have a partial positive charge and a − sign next to the atom expected to have a partial negative charge.

(A) _?__ Te-S __?__

(B) _?_ O-Te __?__

(C) _?__ O-S _?__

The most polar bond is ____ (A,B, or C)

For each bond, show the direction of polarity by placing a + sign next to the atom expected to have a partial positive charge and a − sign next to the atom expected to have a partial negative charge.

(A) __?__ Te-Se __?___

(B) _?__ O-Te __?_

(C) __?__ O-Se __?__

The most polar bond is ____ (A,B, or C)

Identify whether the following statement is true or false. Circle your answer choice. If the answer is false, correct the statement to make it true.

True / False The solubility of silver hydroxide will increase in a basic solution.

True / False An indicator is a weak organic acid that changes color in solution depending on the protonation state

True / False Solubility product constants are large for insoluble salts.

True / False The equation that will correspond to the solubility of the salt, MX3, in water is K_sp = 27x⁴

True / False A Lewis acid is the proton donor.

True / False A strong oxidizing agent has a high reduction potential

True / False Lead will oxidize first in a mixture that contains lead (E_red = −0.13 V) and zinc (E_red = −0.76 V) metals.

Part A: What mass of carbon dioxide is present in 1.00 m3 of dry air at a temperature of 19?C and a pressure of 651torr? Express your answer with the appropriate units.

Part B: Calculate the mass percentage of oxygen in dry air. Express your answer with the appropriate units.

If you could explain how you got your answer that would be great! Thank you!

Here is given info:

Air is a mixture of several gases. The 10 most abundant of these gases are listed here along with their mole fractions and molar masses.

What are two factors that a GC column uses to separate compounds?

1)For each of the following reactions, calculate ΔH∘rxn, ΔS∘rxn, and ΔG∘rxn at 25 ∘C.

3H2(g)+Fe2O3(s)→2Fe(s)+3H2O(g)

N2(g)+3H2(g)→2NH3(g)

2)Before investigating the scene, the technician must dilute the luminol solution to a concentration of 6.00×10⁻²M . The diluted solution is then placed in a spray bottle for application on the desired surfaces.

How many moles of luminol are present in 2.00 L of the diluted spray?

3)A student placed 11.0 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 55.0 mLsample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?

4)A sugar crystal contains approximately 1.4×10¹⁷sucrose (C12H22O11) molecules.

5)When solutions of silver nitrate and potassium chloride are mixed, silver chloride precipitates out of solution according to the equation

AgNO3(aq)+KCl(aq)→AgCl(s)+KNO3(aq)

a)What mass of silver chloride can be produced from 1.17 L of a 0.122 M solution of silver nitrate?

b)The reaction described in Part A required 3.39 L of potassium chloride. What is the concentration of this potassium chloride solution?

5)Consider the precipitation reaction: Li2S(aq)+Co(NO3)2(aq)→2LiNO3(aq)+CoS(s)

a)What volume of 0.160 M Li2S solution is required to completely react with 125 mL of 0.160 M Co(NO3)2?

6)What is the minimum amount of 6.8 M H2SO4 necessary to produce 27.3 g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)

7)Consider the precipitation reaction: 2Na3PO4(aq)+3CuCl2(aq)→Cu3(PO4)2(s)+6NaCl(aq)

a) What volume of 0.180 M Na3PO4 solution is necessary to completely react with 87.1 mL of 0.122 M CuCl2?

A buffer that contains 0.18 M of an acid, HA and 0.49 M of its conjugate base A-, has a pH of 3.71. What is the pH after 0.041 mol of HCl are added to 0.79 L of the solution?

. List ALL of the intermolecular forces that are present in each element or compound. a. N2 b.PH3 c. NF3 d. XeF2

Given a water sample with the following concentrations, calculate the hardness in meq/L and mg/L as CaCO₃

Ca²⁺= 17 mg/L

CO₃^2-= 3.4 mg/L

1)this question concerns 2-bromobutanoic acid CH₃^aCH₂^bCBrH^cCOOH^d

^{a. for each group of protons (}H^aH^bH^cH^{d) state the splitting pattern you would expect to see (assume splitting is only due to neighboring protons)}

^{B. sketch the carbon-13 nmr (without looking it up). clearly assign each peak.}

^{2) what are shim coils in NMR and what is their purpose?}

^{3) what is the absorption frequency in a 2.4 T magnetic field?}

^a)1H   B) ¹³C C)¹⁹F    D) ³¹P

20.0mL of 0.127M diprotic acid (H2A) was titrated with 0.1018M KOH. The acid ionization constants for the acid are Ka1=5.2

Which one of the following alcohols will be soluble in water? Which one of the following alcohols will be soluble in water? 2-pentanol 2-butanol 3-hexanol 2-propanol

a.) What are the limitations of the ICP-MS?

b.) Which elements is it optimal for (generally)?

c.) Which elements will it not measure well?