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Chemitry

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chemitry
I have a list of chemicals, how do i know if they are alkanes and alcohols

chemitry
what does it mean by how many moles of the limiting reactants in sodium bia

chemistry
where would you find silicon dioxide outside a chemitry lab?

chemistry
where would you find silicon dioxide outside a chemitry lab?

Chemitry
if your smoke detector contains 0.10 mg of 241Am, how long will it take to decay 1.25 * 10^-2mg

chemitry
show that the equivalence amount of citric acid for 1.00g of sodium bicarbonate is 0.76g

Chemitry
If he activation energy of a reaction is 4.86Kj, then waht is the percent increase in the rate constant of a raction when the temperature is increased from 45 to 75C

Chemitry
calculate the volume of 1.07M phosphoric acid solution necessary to react with 22.9 ml of 0.150M Mg(OH) 2H3PO4 +3Mg(OH)2 ==> Mg(PO4)2 + 6H20

chemitry
how many grams of hydrogen sulfide will react completely with 12 grams of oxygen?

Chemitry
molecular formula of lithium carbonate is LiCO.What is the molecular weight of the drug? a. 100.88 b. 73.88 c.48 d. 6.94

CHEMITRY
what is solubility, in mol/L, of MgCO3 in a 0.65 mol/L solution of MgCL2 if the ksp of MgCO3 is 2.5*10^-5

chemitry
A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5°C, what is its final temperature? (density of aluminum = 2.70g/cm3)

chemitry--- physical & chemical change---
describe a physical change that appears to change chemically???

Chemitry
the average adult human male has a total blood volume of 5.0 L. if the concentration of sodium ion in this average individual is 0.135 M, what is the mass of sodium ion circulating in the blood

Chemitry
Consider the neutralization reaction that takes place when hydrochloric acid reacts with aqueous calcium hydroxide Write a conversion factor that relates moles of hydrochloric to moles of calcium hydroxide for this reaction

chemitry
help me.. The pKa of acetic acid, HC2H3O2, is 4.76. A buffer solution was made using an unspecified amount of acetic acid and 0.30 moles of NaC2H3O2 in enough water to make 2.00 liters of solution. Its pH was measured as 4.40. How many moles of HC2H3O2 were used?

Chemitry
3moles of sodium hydroxide will neutralize 1mole of citric acid,what volume of 2moles of sodium hydroxide solution will neutralize 50cm of citric acid solution?

Chemitry
Nitrogen dioxide, NO2, decomposes upon heating to form nitric oxide and oxygen according to the following equation: 2NO2(g)---->2NO(g) + O2(g) At the beginning of an experiment, the concentration of nitrogen dioxide in a reaction vessel was 0.1103 mol/L. After 60.0 sec, the...

chemitry who helps me
you are given a solid that is a mixture of na2s04 and k2s04. A0.215g sample of the mixture is dissolved in water. An excess of an aqueous solution of bacl2 is added. The bas04 that is formed is filtered dried and weight. Its mass is 0.299g what mass of s04 ions is the sample ...

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