03/17/18

Calculate the volume of co2 in l, produced when 300 g of butane is burned is burned completely in oxygen. The gas volume is measured at slc
I don’t understand how to find the mole using only the kg of butane
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03/17/18

An alloy weighing 50 gm contains 40gm of silver.a price of 30gm of alloy is cut from it . Find the weight of silver present in the remaining piece of alloy.
Solve it please
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03/17/18

For the following reaction, 30.3 grams of hydrochloric acid are allowed to react with 61.0 grams of barium hydroxide .
hydrochloric acid(aq) + barium hydroxide(aq) barium chloride(aq) + water(l)What is the maximum amount of barium chloride that can be formed? gramsWhat is the FORMULA for the limiting reagent? What... more
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03/17/18

For the following reaction, 0.689 grams of hydrogen gas are allowed to react with 12.8 grams of ethylene (C2H4) .
hydrogen(g) + ethylene (C2H4)(g) ethane (C2H6)(g)What is the maximum mass of ethane (C2H6) that can be formed? gramsWhat is the FORMULA for the limiting reagent? What mass of the excess reagent... more
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03/17/18

half life question
the half-life of a substance is 12 minutes. If there are 100 mg initially, how much of the substance remains after 30 minutes?   I really struggle with the half life problems, do you have some... more
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03/17/18

What causes tropomyosin's affinity for actin?
I'm doing research via expansion microscopy on tropomyosin stability and how it effects actin myosin binding and muscle contraction. I'm super new to research so I don't think my professor expects... more
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03/17/18

Compare the percent dissociation of 0.100M propanoic acid
Compare the percent dissociation of 0.100M propanoic acid
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03/17/18

Calculate the pH of each of the following solutions?
A. A 0.100 M propanoic acid  B. A 0.100M sodium propanoate C. Pure H2O D. A mixture containing 0.100M HC3H5O2 and 0.100M NaC3H5O2
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03/16/18

how many milliliters of 0.2M KOH are needed to neutralize 20mL of 0.1M HCl?
use titration
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Ud

03/16/18

Is the chemical equation balanced? Al2O3 --> Al + O3
science ok so ok ya its hardf plz anwser me plz i really need it
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03/16/18

converting molecules to total atoms
If I had 0.234mol of H2O, I was able to convert that into 4.22g and 1.41e23 molecules, which were both correct. But I wasn't able to calculate the number of total atoms in the sample. Isn't it just... more
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03/16/18

I need help with five chemistry questions
I need help with 5 chemistry questions and would need work to be shown. A. Measure out 0.130 moles of salt (NaCl) into a blue, dry cup. You need to convert to mass in grams. Show work:B. Put... more
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03/16/18

The half-life of a radioactive kind of neptunium is 65 minutes. How much will be left after 130 minutes, if you start with 160 grams of it?
how do you solve this word problem 
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03/16/18

Is there a compound named Lauryl dodecyl Sulfate ?? What is its chemical formula? Is it the same as sodium dodecyl Sulfate?
I want to use sodium dodecyl sulfate for iron ion precipitation from water but I couldn't get it. Instead there was lauryl dodecyl sulfate which i know nothing about 
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03/15/18

How we find that which substance is precipitate after a reaction?
Chemistry
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03/15/18

Measure out 0.210 moles of salt (NaCl) into a blue dry cup, you need to convert to mass in grams. Show work:
I need work to be shown. I would also need help with these two questions. Put 2.85x10^23 molecules of water into a clear cup. You need to convert to mass in grams. Show work:
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03/15/18

How do I identify this acid?
A 0.010M acid solution has a pH of 2.00. The acid could be   A. HNO3 B. H2SO4 C. HCOOH D. CH3OOH
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03/15/18

How do you turn 2/3 to a decimal
I am seriously confused please help me
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03/15/18

what is the mass of the potassium nitrate precipitate produced?
Potassium hydroxide in solution is reacted with 64.2 g of copper (ii) nitrate in this double replacement reaction producing potassium nitrate and copper (ii) hydroxide
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03/15/18

Chemistry help
In a bomb calorimeter (Ccal = 20.00 kJ•K–1), 1.211 g of a hydrocarbon (FW = 242.21 amu) is combusted. The termpeature of the calorimetry increased from 20.00 °C to 20.80 °C. What is the LaTeX:... more
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03/14/18

what is a precursor of nicotine and what is a precurser?
I am doing a project on nicotine and was asked to state the precursors with a picture but I'm not sure what exactly a precursor is and can't find a precursor of nicotine.
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03/14/18

What is the [H3O+] in a 0.025M HNO3?
A. 4.0×10^-13 B. 0.025M C. 1.60 D. 12.40M
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03/14/18

Which of the following salts will be acidic?
A. KClO4 B. NH4Br C. NaHCO3 D. Na2C2O4
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03/14/18

The ionization of water is endothermic. How is Kw related to the temperature of water?
A. Kw increases as temperature increases  B. Kw decreases as temperature increases  C. Kw increases as temperature decreases  D. Kw remains constant as temperature  decreases
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03/14/18

Which of the following factors of an acidic solution would affect its pH?
I. The strength of the acid II. The concentration  of the acid  III. The temperature    A. I and II only  B. II and III only  C. I and III only  D. I, II, and III
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