How many milliliters of an aqueous solution of 0.212 M copper(II) chloride is needed to obtain 6.74 grams of the salt?

Ethanol can be synthesized by direct hydration of ethylene: C2H4(g) + H2O(g) ----> C2H5OH(g). at t = 300degC and P = 60 atm. Calculate the yield of the rxn for conditions as above and the equimolar (1:1) input mixture. Use following data: DfH298 (KJ mol-1): C2H4 = 52.4; H20 = -241.8; C2H5OH = -234.8. DfG298 (Kj mol-1): C2H4 = 68.4; H20 = -228.6; C2H5OH = -167.9

The van der Waals equation for 1 mole of gas is given by (p +av^-2)(v - b) = RT. In general, curves of p versus v forvarious values of T exhibit a maximum and a minimum at the twopoints where (δp/δv)_T = 0. The maximum and minumum coalesceinto a single point on that curve where(δ²p/δv²)_T = 0 inaddition to (δp/δv)_T = 0. This point is calledthe "critical point" of the substance and its temperature,pressure, and molar volume are denoted by T_c,p_c, and v_c, respectively.
    (a) Express a and b in terms of T_cand v_c.
    (b) Express p_c in terms ofT_c and v_c.
    (c) Write the van der Waals equation in terms ofthe reduced dimensionless variables T' ≡ T/T_c , v'≡ v/v_c , p' ≡ p/p_c
This form should involve neither a nor b.

1. What is the difference between the heat of reaction, Qrxn, and the enthalpy of reaction, Hrxn? (

2. In a coffee-cup calorimeter, 1.40 g of NH4NO3 is mixed with 71.0 g of water at an initial temperature of 25.00 oC. After dissolution of the salt, the final temperature of the calorimeter content is 23.39 oC. Assuming the solution has a heat capacity (Cp) of 4.18 J/ oC•g and assuming no heat loss to the calorimeter (surroundings), calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol. (MW(NH4NO3) = 80.05 g/mol)

3. How do cold packs and hot packs work? What kind of thermodynamic process is involved in a hot pack?

4. Who uses hot packs and cold packs? What kind of process is involved in a cold pack?

5. What is the chemical that is used in hot packs that use a super cooled fluid? Why is that chemical a good choice for use to manufacture a hot pack?

In a Wittig reaction, what is the difference between a betaine intermediate and a ylide?

draw the mechanism for 1,3 butadiene = HBR for both possible products. explain which is the major product under thermodynamic control.

17. Consider the following balanced chemical equation:

A. 2Al(s) + 3Cl₂(g) → 2AlCl₃(s)   Determine the mass (in g) of AlCl₃ formed if 27.6 g of Al reacts with 47.6 g of Cl₂

B. What volume, in L, of 0.0771 M LiOH solution is required to produce 72.9 g of water.

2LiOH(aq) + H₂SO₄(aq) → 2H₂O(l) + Li₂SO₄(aq)

_C. What volume (in mL, at 558 K and 3.49 atm) of oxygen gas is required to react with 4.84 g of Al?

4Al(s) + 3O₂(g) → 2Al₂O₃(s)

Molecular Structure and Physical Properties

Consider the following statements and determine which are true and which are false.

true/false  SeF₄ has a see-saw structure.
true/false  KrF₄ is a polar molecule.
true/false  NO₃^- has three resonance Lewis structures.
true/false  Bond angles for IF₆⁺ are 90 °.
true/false  Selenium tetrafluoride (SeF₄) is a non-polar molecule.
true/false  The formal oxidation state of an atom in a molecule (or molecular ion) can be calculated as:
(the number of valence electrons on a free atom) minus (half the number of electrons in bonds to that atom) minus (the number of unshared electrons assigned to the atom in the molecule)

A****41.9 mL of a 0.146 M Na2CO3 solution completely react with a 0.150 MHNO3 solution according to the following balanced chemical equation:  

Na2CO3(aq)+2HNO3(aq)→2NaNO3(aq)+CO2(g)+H2O(l)

What mass (in grams) of carbon dioxide is formed?

B*****

What volume (in mL) of a 0.100 MHNO3 solution is required to completely react with 31.8 mL of a 0.108 MNa2CO3 solution according to the following balanced chemical equation?

Na2CO3(aq)+2HNO3(aq)→2NaNO3(aq)+CO2(g)+H2O(l)

C****

What volume of a 5.70 M solution of NaNO3 do you need to make 0.510 L of a 1.00 M solution of NaNO3?

if you could write out the steps that would be so helpful! thank you

A manufacturer of bicycles has 4833 wheels, 2315 frames, and 2255 handlebars.

1. How many bicycles can be manufactured using these parts?

2. How many wheels are left over?

3. How many frames are left over?

4.How many handlebars are left over?

The molar heat capacity of silver is 25.35 J/mol⋅∘C. How much energy would it take to raise the temperature of 9.10 g of silver by 10.5 ∘C? Use the following values:specific heat of water = 4.18 J/(g⋅∘C) specific heat of steel = 0.452 J/(g⋅∘C)

Find ΔHrxn for the reaction: N2O(g)+NO2(g)→3NO(g) Use these reactions with known ΔH's: 2NO(g)+O2→2NO2(g)ΔH=−113.1kJ N2(g)+O2→2NO(g)ΔH=+182.6kJ 2N2O(g)→2N2(g)+O2(g)ΔH=−163.2kJ

1) how does the presence of lone pairs affect the angle between the atoms bonded to central atom?

2) draw the more stable valence electron orbital diagram for carbon.

3) if a carbon bond is sp3 hybridizedit must have ___ sigma bonds and ___ pi bond. The shape of the molecule at the pi bond must be _______.

This question was about quantum nubers. It isn't multiple questions. just multiple parts of the same question with very short answers according to my teacher. I am confused about how to solve them please help. Thanks.

Question 2

(A) List the allowed quantum numbers m_l for the 2p subshell.

(B) List the allowed quantum numbers m_s for each of the m_l values for the 2p subshell.

(C) List the allowed quantum numers m_l for the 3d subshell.

(D) List the allowed quantum numbers m_sfor each of the m_l values for the 3d subshell.

(E) List the allowed quantum numbers m_l for the 4f subshell.

(F) List the allowed quantum numbers m_s for each of the m_l values for the 4f subshell.

(G) List the allowed quantum numbers m_l for the 5g subshell.

(H) List the allowed quantum numbers m_s for each of the m_l values for the 5g subshell.