02/28/19

CO(g) + O2(g) → CO2(g) Stoichiometry help
CO(g) + O2(g) → CO2(g)In the formation of carbon dioxide from carbon monoxide and oxygen, how many moles of carbon monoxide are needed to react completely with 3.44 moles of oxygen? (round to one... more
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02/27/19

NH3 has a pKb of 4.74. What is the pH of a 3.2 x 10-4 mol L-1 NH3 solution?
I did this question 4 times and got it wrong, I keep getting 13 but the correct answer is 9.83, can someone please explain this to me?
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02/27/19

Consider the following reaction and select the FALSE statement.

Consider the following reaction and select the FALSE statement. 10 I-(aq) + 16 H+(aq) + 2 MnO4-(aq) --> 5 I2(s) + 2 Mn2+(aq) + 8 H2O(l)1) The iodine ion is the reducing agent2) This is a redox... more
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02/27/19

A sample of gas occupies 3.00L STP . If the pressure is decrease to .5 atm what is the new volume of gas?
i need the answer and help cause my teacher doesn't teach
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02/27/19

Metathesis reaction
when 3.06 mL of 1.67-M ammonium Phosphate is mixed with 2.053 mL of 1.650-M ferrous acetate, a precipitate forms. Write balanced chemical equation a. Calculate the Theoretical Yield b, the... more
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02/27/19

Difference between plasma memberane and cell memberane?
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02/27/19

1.01 gh2 is allowed to react with 9.84 gn2 producing 1.70 gnh 3
i need to find the answer because I’m comfused this is apart of my mastering chemistry hwk
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02/27/19

How many grams of nitrogen are there in a sample of nitrogen that contains 4.0 moles of nitrogen atoms?
Plz help this is due tomorrow and I keep getting stuck on this problem !!!
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02/27/19

Geometries Questions

F2 Total number of valance electrons? Polar bonds? Identify polar bond? Polar molecule? BI3 Total number of valance electrons? Polar bonds? Idenity polar bonds? Polar molecule?
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02/27/19

Lewis Structures

Formula: NCl3Name? Valance electrons for each atom? Total number of valance electrons?
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02/26/19

How many liters of NH3 is produced if 1.2 liters of H2 reacts with an excess of N2?
Read the chemical equation.N2 + 3H2 → 2NH3Using the volume ratio, determine how many liters of NH3 is produced if 1.2 liters of H2 reacts with an excess of N2, if all measurements are taken at the... more
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02/26/19

A reactionyields 0.00959mol of O2 gas. What volume will the gas occupy if it is collected at 23.0◦C and 1.19 atm pressure? Answer in units of mL.
A reactionyields 0.00959mol of O2 gas. What volume will the gas occupy if it is collected at 23.0◦C and 1.19 atm pressure? Answer in units of mL.
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02/26/19

What pressure is exerted by 1.66 mol of hydrogen gas in a 5.69 L container at 27◦C? Answer in units of atm.
What pressure is exerted by 1.66 mol of hydrogen gas in a 5.69 L container at 27◦C? Answer in units of atm.
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02/26/19

Find the mass of 234 mL of SO2 at 0.593 atm and −64.0◦C. Answer in units of g.
Find the mass of 234 mL of SO2 at 0.593 atm and −64.0◦C. Answer in units of g.
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02/26/19

How much gas is contained in a) 1.75 L at 253 K and 1.56 atm? Answer in units of mol.
How much gas is contained in a) 1.75 L at 253 K and 1.56 atm? Answer in units of mol.
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02/26/19

What would be the molarity (M2) of the 100.00 mL (V2) of dilute HCl if you used a 25.00 (V1) mL volumetric pipet?

Quantitative dilution of solutions from higher to lower concentrations is a critical skill in this lab course. You have already diluted HCl from higher to lower concentrations using two different... more
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02/26/19

Determine the volume of water in mL needed to prepare 5.0mL (V2) of a 1.8 M (M2) HCl solution using 5.4 M (M1) HCl (M1).
Less quantitative dilutions can also be done without a volumetric flask, The precision of concentration is dependent on how precise the volumes are transferred. For example a dilute solution of HCl... more
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02/26/19

If this reaction produced 20.1 g KCl, how many grams of O2 were produced?
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02/26/19

Electron Areangement

They gave two example: Oxygen’s electron arrangement is 2-6 and oxide ion is 2-8. How do I find that out? Sodium and sodium ionAluminum and aluminum ion
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02/26/19

what is the electron configuration of silicon?
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02/26/19

what is the electron configuration of nitrogen
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02/26/19

Calculate the amount of heat needed to boil 124. g of acetic acid ( HCH 3 CO 2 ), beginning from a temperature of 25.0 °C .
Calculate the amount of heat needed to boil 124.g of acetic acid (HCH3CO2), beginning from a temperature of 25.0°C. Round your answer to 3 significant digits. Also, be sure your answer contains a... more
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02/26/19

A sample of natural gas contains 7.546 moles of CH4, 0.775 moles of C2H6, and 0.444 moles of C3H8. If the total pressure of the gases is 4.03 atm, what are the partial pressures of the gases?
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02/25/19

Which noble gas has the same electron arrangement as each of the following ions?

K +Mg 2+S 2-
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02/25/19

What is the chemical symbols for these ions? And how do I figure that out?

A chlorine atom that has gained one electronan oxygen atom that has gained two electrons a cesium atom that has lost one electron a aluminum atom that has lost three electrons
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