05/02/18

Could someone help me again please. This is about pH. I really need your help guys
100ml of H2SO4 0.05M are added with 10ml of 1M NaOH. Determine the pH of the solution.
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05/02/18

What are the equilibrium concentrations of each half cell?
In the concentration cell shown below, what will be theconcentration of Ni2+ in each half cell when equilibrium isreached?            salt bridge  _________________  |                           ... more
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05/02/18

NH3SO4 + BaCl2
what is the answer to this. part of my work.
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05/01/18

Algebra solution concentration
a chemist has 2 large containers of sulfuric acid solution with concentrations of acid 15% and 30%. how many ml of each solution should he mix to prepare 1250 ml of solution with 25% acid... more
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05/01/18

Prediction precipitation
iron(II) iodide + cadmium acetate   sodium chloride + barium bromide   potassium hydroxide + iron(II) sulfate    when combined, do each of these form a precipitate? 
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05/01/18

Would the HCL affect the calculation of molarity ?
If you forgot to fill the tip of the buret with HCL solution before starting the standardization of your NaOH solution, how would this affect the calculated molarity of NaOH from the data you... more
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05/01/18

Calculate the molarity of a solution
Made from combining 24.1mL of NaOH into a final volume of 1.25mL
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05/01/18

How many grams of NaOH are in 250mL of a 1.25M NaOH solution?
That was my entire question
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05/01/18

Write balanced chemical equations
1. Aqueous solution of lead(II)acetate reacts with aluminum chloride 2. Aqueous chromium(lll) and silver(l) nitrate react
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05/01/18

combustion of coke is a combination reaction CO2 is not a pollutant. then why is combustion of coke harmful
chemistry qustions
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05/01/18

A car travels 840km on 72 litres of petrol. Find the fuel consumption of the car in L
Topic 5 ration revison quiestions
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05/01/18

It is not a component of lead acid cell :1.bakelite case 2.rubber case 3.sulphuric acid 4. lead oxide plate
Chemistry based question
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05/01/18

Are CB1 receptors found mostly on inhibitory interneurons or neurons at the neuro-muscular junction?
A multiple-choice question from my neuro class study guide. Deduced it down to two possible answers. I appreciate the help.
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04/30/18

How many liters of a 0.215 molar solution are needed to contain 32.1 grams of CO(NH2)2
I'm having really hard time solving this. I need the answer as soon as possible.
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04/30/18

6.626 X 10 exponent 34 what is the significant figure?
I need To know the significant figure of this question. Unsure if it’s 4 or more. 
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04/30/18

How do you balance this equation : CuFeS2+O2+SiO2=Cu2S+FeSiO3+SO2+ Cu2O
I'm not able to balance the Cu and O's, would someone please be able to explain to me how you balance this equation? Any help would be much appreciated. Thank you
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04/29/18

Chemistry: Stoichometry
A 1.00 gram sample of potassium bicarbonate is decomposed by heating. If the resulting potassium carbonate weighs 0.725 grams and the calculated yield is 0.776 grams, what is the percent yield?
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04/29/18

Chemistry: Stoichometry
Lithium metal decomposes in water and releases hydrogen gas. If 275 mL of hydrogen gas are produced at STP, what is the mass of lithium that reacted.   Li + H2O -> LiOH + H2
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04/29/18

Chemistry: Stoiciometry
A Student used 4.55 grams of salicylic acid, along with acetic anhydride, to prepare aspirin.C7H6O3 + C4H6O3 -> C9H8O4 + C2H4O2(salicylic)   (acetic an)  (aspirin)    (acetic acid)(a)Find the... more
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04/29/18

Covalent bonds and ionic bonds occur because atoms want to become more stable. To do this, many atoms gain, lose, or share electrons until their outermost elect
i.e., resemble the outermost shells of the noble gases). How many electrons are needed to make a full outer shell?  
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04/29/18

A substance is found to be 22.9% Na, 21.5% B and 55.7% O. What is the empirical formula of this compound
I need to find the impirical formula for this. pls help me
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04/29/18

What is the freezing point of 75.0 g NaCl in 150.0 mL aqueous solution? (Kf = 1.86 °C/m)
What is the freezing point of 75.0 g NaCl in 150.0 mL aqueous solution? (Kf = 1.86 °C/m) Assume complete dissociation of the salt.
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04/29/18

Which of the following would be soluble in water?
sugar (C12H22O11) , NaOH, ethane (CH3CH3) sugar (C12H22O11), NaCl, HCl sugar (C12H22O11), HNO3, methane (CH4)
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04/29/18

Calculate the molality of a solution
Calculate the molality of a solution that contains 51.2 g of naphthalene, C10H8, in 500 mL of carbon tetrachloride. The density of CCl4 is 1.60 g/mL.
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04/29/18

Carbon dioxide gas is studied at 25*C. What is the volume of the pressure we’re altered from 21.58 atm to 91.58 atm and 37,576.23 ml?
I need help to understand what gas law formula I would use to complete this. 
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