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Type: Posts; User: hslove142331
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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....
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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...
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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
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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...
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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
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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...
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Okay... I am still don't understand,but thank you so much
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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,...
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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...
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Actually my answer was correct... but I put your answer and I lost points.
But,, its okay.
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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...
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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...
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Sorry.. your answer is not correct.. anyway thanks
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I really don't know how to do it..
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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...
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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 --> *...
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The problem just given us that data.
Even, I tried to solve but it wasn't correct...
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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...
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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 +...
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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...
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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...
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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...
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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 ?
...
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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...
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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
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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
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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...
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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...
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I did second problem, and my answer was correct ;)
But, I am still confusing on first question
Please help
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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...
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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...
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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...
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When a reagent mixes thoroughly with oil it indicates the reagent tests for nonpolar solubility.
I think this statement is true...
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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?
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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...
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I put like this in my WileyPlus it say all incorrect..
So confusing please help me..
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I got 11.56moles... and how can I do next?
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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...
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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...
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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?
...
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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
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I think line 4 is melting point.
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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...
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