06/27/22

Help me solve this problem
The specific heat of solid iron metal at 273.15K and 1 bar pressure is 0.449 J/g*K. How much heat (in units of kJ) is released when 96.01g of Fe(s) cools from 338.5K to 293.9K.Assume the specific... more
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06/27/22

An 2.65 g sample of an unknown gas from Group VIIA occupied a volume of 1.64 L at 822 torr and 38 oC. Find the molecular weight of this gas. Show all work.

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06/27/22

What mass of aluminum must be used to produce 5.00 L of H2 gas at STP. 2Al + 6HCl  2AlCl3 + 3H2
gg/molmolLL/mLmol
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06/27/22

How many moles of solute are present in the following solutions? 110 mL of 0.17 M NaHCO3
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02/22/22

A 6.60 L weather balloon at 1.00 atm and 289 K is released. If it shrinks to a size of 6.20 L at 0.93 atm, what is the temperature?
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02/16/22

what is the molarity

The flask contains 25 mL of an unknown diprotic acid aqueous solution that reacts in a 1:2 stochiometric ratio with NaOH. Titrate the solution with NaOH to determine the concentration of the... more
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02/16/22

what is the weigh out

A student wishes to prepare 250-mL of a 0.171 M sodium acetate solution using solid sodium acetate, a 250-mL volumetric flask, and deionized water.(a) How many grams of sodium acetate must the... more
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02/09/22

My instructor wants us to answer this question

Show that a ∆T = 2.0 C is the same as ∆T= 2.0 K.
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02/09/22

Calculate molar mass of X, knowing that X effuses at a rate of 28m/s and nitrogen effuses at a faster rate, 43m/s.

Calculate molar mass of X, knowing that X effuses at a rate of 28m/s and nitrogen effuses at a faster rate, 43m/s. (Hint: you need to get rid of the square root before doing any mathematical... more
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02/08/22

What volume of a 2.70 M KI stock solution would you use to make 0.330 L of a 1.25 M KI solution?
PLS HELPPPPPPPPPPPPPPPP
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02/08/22

How many O atoms are in 125g of Glucose (C6H12O6)
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02/08/22

How much table salt (NaCl) do you need to make 5-liters of a 5M solution?

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02/02/22

What would be the mass of an O2 gas having a volume of 72L at a pressure of 22.7mmHg and a temperature of 87oC.
What would be the mass of an O2 gas having a volume of 72L at a pressure of 22.7mmHg and a temperature of 87oC.
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02/02/22

Gaseous butane (CH3(CH2)2 (CH3) reacts with gaseous oxygen gas (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H2O)
What is the theoretical yield of water formed from the reaction of 4.65g of butane and 26.5g of oxygen gas? Round your answer to 3 significant figures.= _____ g
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01/27/22

Equilibrium and using ICE tables
A reaction vessel initially contains only 3.5 atm of N₂O₄. When the system reaches equilibrium according to the reaction below, there is 1.7 atm of NO₂ in the vessel. What is Kp for this reaction?... more
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01/27/22

Calculate the number of molecules contained in 2.31 moles of calcium hydroxide - Ca(OH)2. Include the units, but do not write the chemical formula. Round the answer to 3 significant figures.
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01/27/22

Ammonia is produced from a reaction as shown in the equation H2(g) + 3N2(g) 2NH3(g). The number of moles of hydrogen required to produce 12 moles of ammonia is
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01/24/22

If you burn 32.7 g of hydrogen and produce 292 g of water, how much oxygen reacted?
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01/18/22

help me pls w this chemistry question
A gas occupies 24 L at 273 K and 1.0 atm. What is the volume if the conditions change to 388 K and 3.0 atm?
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04/21/20

Gas Law Chemistry
1) How many liters are occupied by 1.05 mol of nitrogen at 198◦C and 0.564 atm pressure?2) A gas sample occupies 4.71 L at 39◦C. What is the pressure given that there are 1.18 mol of gas in the... more
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04/21/20

STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS
What mass of oxalic acid,H2C2O4 is required to prepare 300 mL of a solution that has a concentration of 0.15 M H2C2O4 ?Mass___g
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05/24/19

I need help on Word problem
An order of three sodas and two hot dogs totaled $6.45, while the next order – five hot dogs and two sodas – was a $7.93 total.How much for one hot dog and one soda?
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01/17/16

Down below is the question... Can you please show work and answer thanks!
A sample of gas at 45 degrees celsius and 1.82 atm occupies a volume of 2.29 L. What volume would this gas occupy at 193 degrees celsius and 0.817 atm? 
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05/06/15

At the school store, Juanita bought 2 books and a backpack for a total of $26 before tax. Each book cost $8 less than the backpack.
Find the price of each book and the price of the backpack
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05/06/15

Please help me do this and thank you
-3a4b3times-5a4b5
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