02/28/18

Write the balanced equation for the reaction between potassium hydroxide and sulfuric acid?
If 25g of sulfsulf acid is reacted 7.7g of potassium hydroxide, how many grams of potassium sulfate are prproduc? 
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02/28/18

which is greater 0.20mm or 0.30mm ??
which is greater thickness 0.20mm or 0.30mm
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02/27/18

An IV order calls for administratioin of 1.5mL/minute of a solution for two hours. How much solution is needed?
I need to know how to solve this algebraically?
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02/27/18

Does the density increase, decrease, or stay the same
You put a sample of aluminum on a hot plate. What would you expect to happen to its density? It would stay the same, decrease, or increas
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02/27/18

amount of heat needed to melt 45.9 g of solid ethanol and bring it to a temperature of -37.4 degrees celsius
 Calculate the amount of heat needed to melt 45.9 g of solid ethanol and bring it to a temperature of -37.4 degrees celsius. Round your answer to 3 significant digits. Also, be sure your answer... more
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02/27/18

Find the volume and round to the correct number of significant digits
One beaker contains 19.93 mL, another contains 14.0 mL and a third contains 10.6 mL. What is the total volume of the three beakers? Select the answer with the correct number of significant digits.
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02/27/18

In a decomposition reaction 25.0 g of potassium chlorate was heated, what volume of oxygen gas could be collected at STP?
this is a chemistry question on my homework and I haven't figured it out yet
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02/27/18

Im stuck on this homework problem
how many grams of a 48.7% solution of benzene dissolved in toluene contains 80.00g of toluene
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02/26/18

Chemistry Homework
A student measures the mass of a sample to be 12.032 g and the volume of the sample to be 15.03 mL. If the samples were measured at 25.0 °C, what is the specific gravity of the sample?
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02/26/18

A certain ore is 35.3% nickel by mass. How many kilograms of this ore would you need to dig up to have 75.0 g of nickel?
 A certain ore is 35.3% nickel by mass. How many kilograms of this ore would you need to dig up to have 75.0 g of nickel
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02/26/18

What molecule is this?
https://s17.postimg.org/h3red77pr/netgeo2.png
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02/26/18

Hydronium ions and water
A solution is known to have a hydronium ion concentration of 1.0*10^-6 M. What percentage of the total H3O+ ion concentration comes from the dissociation of water?   a. 1% b. 3% c. 5% d.... more
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02/26/18

Acid-base question
Which of the followings statements are true for a 1.0 M solution of the strong acid HCl in water?   a.[Cl-]>[H3O+] b.The pH is 1.00 c.[H3O+]=1.0M d.[HCl]=1.0M e.[H3O+]=[OH]- So far I have... more
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02/25/18

Whats the correct way to approach this concentration question?
Part I. Preparation of a Fe(III)-oxalate complex: (4 pts) a) Recorded mass of Fe(NH4)2(SO4)2●6H2O used: 1.3807 (g) b) pH paper color upon addition of oxalic acid: Magenta c) Does this color... more
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02/25/18

Calculate the theoretical yield of salicylic acid when you start with 2.7 grams of methyl salicylate and an excess of sodium hydroxide. Assume complete conversi
Chemistry Help please!
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02/25/18

How do I solve this AP Chemistry problem on Equilibrium?
In which of the following systems would the number of moles of the substances present at equilibrium not be shifted by a change in the pressure of the system at constant temperature?   A. CO... more
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02/25/18

Which of the following will favor the reactants when the reaction reaches equilibrium?
A. Kc is a very small number B. Kc is a very large number C. Cannot tell without knowing the value of Kc   D. Cannot tell, since the time required  to reach equilibrium does not depend on Kc?
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02/25/18

How many tablets?
 A good yield for their synthesis, 0.763 g. How many tablets of aspirin could they make from this? There are 324 mg aspirin/ tablet.
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02/24/18

SDS-Page question?
what is the relationship between gel strength (%) and mobility of protein?
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02/23/18

If 34.19g of NaCl react with excess of AgNo3, how many molecules will be formed?
Chemistry Question
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Hw1

02/23/18

CHEMISTRY 123
1.38 g H2 is allowed to react with 10.2 g N2, producing 2.35 g NH3.Part AWhat is the theoretical yield in grams for this reaction under the given conditions?Express your answer to three significant... more
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Hw3

02/23/18

CHEMISTRY 123
What is the molarity of ZnCl2 that forms when 30.0 g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 260 mL . Zn(s)+CuCl2(aq)→ZnCl2(aq)+Cu(s)
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02/23/18

Arrange in the order of increasing percent ionic character
Did I do this correctly?   in increasing order of percent ionic character: N-N, S-O, Cl-F, K-O, Li-F
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02/23/18

How many kilometers are there in seventeen hundred metres?
Help please
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02/22/18

If you burn 59.5 g of hydrogen and produce 531 g of water, how much oxygen reacted?
i dont get my home work at all its really hard because he dont really teach it
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