Zn(s)+Sn2+(aq) ? Zn2+(aq)+Sn(s)

Express your answer as a chemical equation. Identify all of the phases in your answer.

Zn(s)+Na+(aq) ? Zn2+(aq)+Na(s)

Express your answer as a chemical equation. Identify all of the phases in your answer.

Cl?(aq)+NO?3(aq) ? NO(g)+Cl2(g)

Express your answer as a chemical equation. Identify all of the phases in your answer.

Draw a picture of solid NaCl, and describe what kinds of interaction are present in NaCl.

Draw a picture of NaCl after it dissolved in water, and describe what kinds of interaction are present in NaCl(aq).

What interactions had to be overcome to form this solution? (Nacl)Was this process exothermic or endothermic?

What interactions had to be formed to form this solution? (Nacl)Was this process exothermic or endothermic?

Consider the reaction IO−4(aq)+2H2O(l)⇌H4IO−6(aq);Kc=3.5×10−2IO4−(aq)+2H2O(l)⇌H4IO6−(aq);Kc=3.5×10−2
If you start with 22.0 mLmL of a 0.908 MM solution of NaIO4NaIO4, and then dilute it with water to 500.0 mLmL, what is the concentration of H4IO−6H4IO6− at equilibrium?

How does insulin, acting through the insulin receptor, exert "downstream" effects? In other words, what are the consequences, at a biochemical/molecular level, of the binding of insulin to a cell, through the insulin receptor.

Can you explain what this question is asking as well. Please list your sources.

Thank you!

What is the pH of 0.050 M Ba(CN)2 solution?

please show work. Thank you.

The separation of a mixture (NH₄Cl, NaCl and SiO₂) is accomplished by: (1) heating the mixture to sublime the NH₄Cl, (2) extracting the NaCl with water, and (3) evaporating water from both the NaCl and SiO₂, to yield the dry mixture.

Could the separation of these three components be accomplished in any other order while using same techniques?
Could the separation of these components be accomplished using other physical methods of separation besides these three?

Could please explain this to me? Thank you in advance!

Calculate the molar solubility, s, of calcium iodate in 0.020 M Ca(NO3)2, a completely dissociated strong electrolyte. (NO3- ion does not chemically interact with either Ca2+ or IO3-.) Assume that Ksp for Ca(IO3)2 = 2.0 x 10^-6.

To set up the problem, we write the following equations:

Material balance for calcium: [Ca2+] = s + 0.020

Material balance for iodate: [IO3-] = 2s

Ksp = 2.0 x 10^-6 = [Ca2+][IO3-]^2 = (s + 0.020)(2s)^2

The last equation only contains one unknown, the value of s, which we would like to calculate; but s is not negligible compared to 0.020, which leaves us with a nasty equation that is cubic in s. An approach that often works in a situation like this is to rearrange the equation into a more useful form and obtain s by iteration. Thus we can write

4s^2 = Ksp/(s + 0.020) or s = 1/2(Ksp/(s + 0.020))^1/2

We must find the value of s that makes both sides of the equation equal. Start first by inserting a trial value of s (say, 0.006M) in the right hand side of the latter equation and calculating a value of s. You will get s = 0.00438. For your next trial vvalue. take something about halfway between 0.00438 and 0.006. Continue the iteration process until you calculate a value of s that is nearly the same (within 5%) as the value you inserted on the right-hand side of the equation. Thank you!)

From the table of geometries below, determine the correct molecular shapes of GeF₄, SeF₄, and XeF₄. (Enter three letters that correspond to GeF₄, SeF₄, and XeF₄ in order, e.g. ABC, DCE, EBA, etc.)

the half life of protactinium-217 is 4.90x 10^-3 sec. a)what is the order of the reaction? How do you know? b) What is the rate constant for the decay?

The development and use of new drugs is one of the most important processes in modern healthcare. Complete the sentences below and place them in the correct chronological order.

a. when a promising drug molecule is identified it will be _______. Before being released onto the US market it must undergo extensive ___________ in clinical trials before finally receiving __________.

b. Many different related structures are made and tested to determine the _________ between molecule and its target effect. One way to produce many similar compounds quickly is called ___________.

c. New drugs are developed by starting with a ________, which shows promise for treating a target _______ or symptom. These compounds may be products from ________ which are known to be ___________.

d. Once the _________ has expired, chemically identical _______ can appear on the market.

e. After years of safe and successful use, some medicines become available as ____________ which are available without prescriptions.

A 37.5 g piece of gold at 83.0 �C is added to 100.0 g H2O at 22.0 �C in a well-insulated cup. What is the temperature after the system comes to equilibrium? (The specific heat capacity of Au is 0.129 J�g^�1�K^�1)

Calculate the [H3O+] of the following polyprotic acid solution: 0.145M H3C6H5O7.

Calculate the pH of this solution.

1. Solid urea, (NH₂)₂CO, burns to give CO₂,N₂, and liquid H₂O. Its heat of combustion is -632.2 kJ/mol. Balance the equation for combustion of urea, and calculate the heat generated per mole of H₂O formed. (Enter in kJ.)

1B.Using this heat of combustion and the appropriate thermodynamic data, determine the heat of formation of urea. (Enter in kJ.)

2. Given that the ΔH^o_rxn = -2842.0 kJ, for the following reaction:

2C₃H₅(NO₃)₃(l) → 6CO₂(g) + 1/2O₂(g) + 3N₂(g) + 5H₂O(g)

determine the standard enthalpy of formation, ΔH^o_f, for: C₃H₅(NO₃)₃(l)(nitroglycerin). Enter in kJ/mol.

3a. Use standard enthalpies of formation to determine ΔH^o_rxn for:

2SO₂(g) + O₂(g) → 2SO₃(g)

Enter in kJ.

3b. Use standard enthalpies of formation to determine ΔH^o_rxn for:

2NO₂(g) → N₂O₄(g)

Enter in kJ.

A team of USGS scientists detected a plume of the soil fumigant 1,2-dichloro-propane (DCP) in the groundwater flowing away from a field. The aquifer solids have an fOC (organic carbon content) of 0.6%, a solid density of 2.66, and a porosity of 0.3. If DCP partitions fast between OC and water, and if partitioning into OC is the main process that slows down DCP transport estimate the retardation factor Rf. log KOC [L/kg] = 2.28 for DCP.