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I did these three questions.
Could you please check that these are correct or not?

a. Ba^2+(aq) + Na2CO3(aq) --------> BaCO3(s) + 2Na^+
Ba^2+ + CO3^2- -------------------> BaCO3(s)

b....

How should I drawing a digram of a diploid cell with one chromosome pair undergoing mitosis and diagram an identical cell undergoing meiosis.

Please help me how to drawing these diagrams.

Thank...

1.what characteristics of the following cellular structures help identify progress during division?
Nucleus-
Chromosomes-
Spindle apparatus-
Cell wall or cell membrane-

Please help me.

Also

At 25°C, the value of Ksp for AgCN is 2.2 x 10-16 and that for Zn(CN)2 is 3.0 x 10-16.

In units of grams per 100 mL of solution, what is the solubility of AgCN?

In units of grams per 100 mL of...

How can I calculate this? 4x^3=3.0x10^-16

I don't know how to figure out that when its like X^3
I can do X^2, but not on X^3
Please Help me Thanks

I need to find x of 4x^3=3.0x10^-16

Write ionic equations that illustrate how each pair of compounds can serve as a buffer pair. Use the smallest possible integer coefficients.

H2CO3 and NaHCO3 adding H+,
AND
H2CO3 and NaHCO3...

Okay... I am still don't understand,but thank you so much

NaI - consists of Na+ and I-. Na+ comoes from NaOH (strong base) and I- comes from HI (weak acid). Hence, NaI is more basic.

KF - Made from KOH and HF. Both are strong base and acid respectively,...

Consider the following compounds and suppose that 0.5 M solutions are prepared of each: NaI, KF, (NH4)2SO4, KCN, KC2H3O2, CsNO3, and KBr.

I really don't know how to figure out that which solutions...

Actually my answer was correct... but I put your answer and I lost points.
But,, its okay.

1.what is meant by "initial reaction kinetics?"

2.what is the role of peroxidase in a cell? In an organism?

3.what is the role of amylase in a cell? In an organism?

4.what is the role of...

At 25 °C, Kc= 0.145 for the following reaction in the solvent CCl4.
2BrCl <------------> Br2+Cl2
If the initial concentrations of Br2 and Cl2 are each 0.0195 M, what will their equilibrium...

Sorry.. your answer is not correct.. anyway thanks

I really don't know how to do it..

1.If a rock sample was found to contain 5.60 x 10-7 mol of argon-40, how much potassium-40 did the rock contain 1.3 x 109 years ago?

2.A wooden door lintel from an excavated site in Mexico would...

Oxidation of NO to NO2 ― one of the reactions in the production of smog ― appears to involve carbon monoxide. A possible mechanism is

CO + * OH --> CO2 + H *
H * + O2 --> HOO *
HOO * + NO --> *...

The problem just given us that data.
Even, I tried to solve but it wasn't correct...

The following data were collected for the decomposition of acetaldehyde, CH3CHO (used in the manufacture of a variety of chemicals including perfumes, dyes, and plastics), into methane and carbon...

What is the rate law for the reaction? (Note: Choose as many answers as appropriate.)


The following data were obtained for the reaction of (CH3)3CBr with hydroxide ion at 55 oC.

(CH3)3CBr +...

35.0mL sample of water is titrated with 0.0100M EDTA. Exactly 9.70mL of EDTA are required to reach the EBT endpoint. How can I calculate total hardness in ppm CaCO3?

Please Please help, any...

what is the mass of KCl in a 0.000198ppm solution?
= 0.000198 * 1kg / 10^6
= 1.98 * 10^-10 g = 0.98ng (nanograms)
I did it, correct, answer?
Please check it for me.

Calculate the number of...

I did it!

So, its going to be 196?

To make a particular sweet substance, A concentrated sucrose solution is boiled until the temperature reaches 267ºF.

I don't know how can I find molality , they give me only temperature.
How can...

A solution of acetic acid, CH3COOH, has a concentration of 0.205 M and a density of 1.00 g mL-1. What is the molality of this solution?

Mol of solute/kg of solvent

Can you help me ?
...

Thank you so much :)

A compound has a vapor pressure of 405 mm Hg at 249 Celsius. This compound boils at 281 celsius at the sea level. Calculate its heat of vaporization.

How can I find this?
Do you know any formula...

Oh.. okay I tried 1&5 and it says its not correct.
So, I was so confusing that I think that 1&5 is correct... I don't know why
They saying that incorrect..
Thanks

How about number 3?

Functional group to macromolecule family or families it is commonly associated with.

a.phophates
b.sulfhydryl
c.ammo
d.carbonyl
e.carboxyl
f.hydrocarbon
g.hydroxyl

At a molecular level, explain why in osmosis there is a net migration of solvent from the side of the membrane less concentrated in solute to the side more concentrated in solute by selecting all...

The unit cell edge of a substance (1 monatomic cation:1 monatomic anion) having a crystal lattice identical to that of sodium chloride has a length of 586.2 pm. The cation of the substance has a...

I did it, Thanks

I did second problem, and my answer was correct ;)

But, I am still confusing on first question

Please help

I did it !

I did it

Write a paragraph describing the mechanism by which soap cleanses.

I need to write a paragraph for describing the mechanism by which soap cleanses.

Please give me idea that what I need to write...

Classify each of the following mixtures as a true solution,colloid,or a suspension.

1)sand/water-suspension
2)sugar/water-solution
3)smoke-colloid
4)uncooked egg white-colloid,suspension...

I found answer
Thank you :)
But, here more queation.. Its more harder than before question

1.The unit cell edge of a substance (1 monatomic cation:1 monatomic anion) having a crystal lattice...

When a reagent mixes thoroughly with oil it indicates the reagent tests for nonpolar solubility.

I think this statement is true...

Hi,

Just three days ago ,
My computer loading images too slowly, It takes few minutes.
I mean not downloading images.

Just a webpages images.
How can I fix this problem?

Silver forms face-centered cubic crystals. The atomic radius of a silver atom is 144 pm. Consider the face of a unit cell with the nuclei of the silver atoms at the lattice points. The atoms are in...

I put like this in my WileyPlus it say all incorrect..
So confusing please help me..

I got 11.56moles... and how can I do next?

1.Acetic acid, CH3COOH (Recall that the acid functional group contains an -OH and a double bonded oxygen.)


2.Hydrogen sulfide, H2S
Ionic bond
London forces

3.Sulfur trioxide, SO3
Ion...

1.Acetic acid, CH3COOH (Recall that the acid functional group contains an -OH and a double bonded oxygen.)

2.Hydrogen sulfide, H2S

3.Sulfur trioxide, SO3

4.Methylamine, CH3NH2


*ionic...

The molar heat of vaporization of carbon disulfide, CS2, is 28.4 kJ mol-1 at its boiling point. How many kilojoules of heat would be liberated by the condensation of 6.57 g of carbon disulfide?
...

Oh so, 3 is false and only number 4 is correct right?

Yeah.. I was confusing on these two answers.

Thank you , you make me understand

I think line 4 is melting point.

Picture mean is a cooling curve for one mole of a substance


Which portion of the graph corresponds to the release of the heat of vaporization?

1. Region (1).

2. Region (2).

3. Region...