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bekah

Questions and answers by visitors named bekah

Questions (52)

For each organic compound, determine if it is an alkane, alkene, or alkyne. (No ringed structures and only one multiple bond per
1. 4 answers
2. 1,318 views
1. the center of the Renaissance2. written backwards 3. da Vinci apprenticed for this person 4. innovative High Renaissance
1. 7 answers
2. 10,904 views
can you just show me how to set this up? or a formula that could help? im confused.The length of a rectangle is increasing at 3
1. 3 answers
2. 472 views
Joe stands on a bridge kicking stones into the water below. If he kicks a stone with a horizontal velocity of 3.10 m/s, and it
1. 2 answers
2. 1,027 views
n+3.4<5.8
1. 1 answer
2. 325 views
Consider the titration of 50.0 mL of 0.200 M HOCl by 0.200 M KOH for the next five questions (Ka for HOCl = 3.5 x 10-8).Calculat
1. 4 answers
2. 1,934 views
Consider a buffer solution consisting of CH3NH3Cl and CH3NH2. Which of the following statements are true concerning this
1. 3 answers
2. 3,302 views
enzoic acid is a weak monoprotic acid with Ka = 6.5×10-5 M. NaOH(s) was gradually added to 1.00 L of 8.66×10-2 M benzoic acid.
1. 2 answers
2. 702 views
Select only the True statements about buffer systems.Select all that are True. 1. Starting with NH3(aq) and adding a small
1. 2 answers
2. 1,103 views
A 1.0 M acetic acid solution (CH3COOH, pKa = 4.7) is neutralized by dissolving NaOH(s) (a strong base) in the solution. Estimate
1. 2 answers
2. 1,127 views
If my original sample contained 7.1 grams of potassium chlorate. How many moles of oxygen gas would I expect to have evolved?
1. 2 answers
2. 910 views
My original sample of mixed salt had a mass of 8.9 grams. After heating the mixture in the crucible and weighing it multiple
1. 2 answers
2. 523 views
It is possible to manipulate the solubility of some compounds through pH adjustments. What is the appropriate pH that will yield
1. 2 answers
2. 595 views
A 1.0 L solution has 10.00 grams of CaCl2 dissolved in it. What is the Molar solubility of AgCl in this same solution? The Ksp
1. 2 answers
2. 1,284 views
Adding a complex ion forming species to a solution will increase the solubility of a slightly soluble species. Calculate the
1. 2 answers
2. 524 views
What is the standard entropy of reaction, the standard entropy of reaction, in J/K, for the combustion reaction of ethylene
1. 4 answers
2. 1,186 views
Under standard conditions, the Gibbs free energy of the reactants G,std(reactants) in a reaction in the gas phase is 232.94 kJ
1. 2 answers
2. 526 views
Use the following pair of reduction half-reactions to design a galvanic cell. Then write in the proper coefficient for each of
1. 4 answers
2. 2,412 views
Consider the following standard reduction potentials of some commonly used metals:ξo (V) Au3+ (aq) + 3 e- → Au (s) +1.50 Ag+
1. 3 answers
2. 1,180 views
Construct a galvanic (voltaic) cell from the half reactions shown below.Au3+ + 3 e- → Au (s) ξo= 1.420 V Br2 (l) + 2 e-→ 2
1. 3 answers
2. 1,197 views
For the reaction, shown below, determine which statements are True and which are False.3Fe(s) + Cr2O72-(aq) +14H+(aq) →
1. 4 answers
2. 1,673 views
How many grams of copper will be deposited at the cathode of an electrolytic cell if a current of 680.0 mA is run through a 2.5
1. 3 answers
2. 1,588 views
The cell shown above is a concentration cell. Both cells contain a copper solution and have copper electrodes. The only driving
1. 4 answers
2. 1,735 views
This type of functional group is often sweet smelling and may be used as a fragrance. When it reacts with water it will produce
1. 3 answers
2. 513 views
This functional group can be generated by oxidation of an aldehyde. Oxidation is just the reaction with oxygen, but unlike
1. 2 answers
2. 1,091 views
Match the name or structure with its functional group. Each molecule has only one functional group.My choices are alkane,
1. 2 answers
2. 1,145 views
1. Art enabled new understandings in this field2. Credited with being the founder of Renaissance painting in the Netherlands 3.
1. 6 answers
2. 1,757 views
1. art enabled new understandings in this field (the protestant reformation)2. credited with being the founder of Renaissance
1. 10 answers
2. 1,604 views
1. During the ______, the writings and art of Ancient Greeks were rediscovered.2. ______ is the study of religious faith,
1. 9 answers
2. 4,049 views
How long does it take for 10.0 g of a radioactive isotope to decay to 1.25 g if its half-life is 17.0 d?
1. 2 answers
2. 747 views
A sample of radon has an activity of 80,000 Bq. If the half-life of radon is 15 h, how long before the sample's activity is
1. 2 answers
2. 725 views
If a radioactive sample has an activity of 8.33 Bq, how many disintegrations per second are occurring?
1. 2 answers
2. 497 views
The half life of Am-241 is 432 y. If 2.00 g of Am-241 is present in a sample, what mass of Am-241 is present after 1000.0 y?
1. 2 answers
2. 542 views
A typical dose of a radioactive sample is 27.0 mCi. How long does it take for the activity to reduce to 0.100 mCi? The half life
1. 3 answers
2. 552 views
which of the following ions are formed when AgNO3 dissociates?a. O2- b. N3- c. AgN2- d. NO3- e. N2-
1. 1 answer
2. 465 views
how many moles of HCl will be produced when 30g of H2O are reacted according to the chemical equation 2AlCl3 + 3H2O -> Al2O3 +
1. 4 answers
2. 1,379 views
the molar mass of NaCl is 58.45g. How many molecules does a gram of NaCl contain?
1. 4 answers
2. 1,509 views
Consider the chemical reaction, 2Al + 3Cl2 → 2AlCl3. Here, 56 g of Al can produce 415.14 g of AlCl3 (Molar masses: Al = 26.98
1. 2 answers
2. 1,000 views
consider the chemical reaction, 2Al + 3Cl2 -> 2AlCl3. here, 212.7 g of chlorine can produce a maximum of 266.66 g of AlCl3
1. 3 answers
2. 1,590 views
In a chemical reaction, A and B reacts to form D. C is the intermediate product of this reaction. Percent yield of the reaction
1. 2 answers
2. 583 views
Consider the unbalanced chemical reaction Al + Cl2 → AlCl3. How many moles of AlCl3 can be obtained from 360 grams of Cl2?
1. 4 answers
2. 997 views
H2 stored in a 50.0 L container has a pressure of 500.0 torr. O2 stored in a 25.0 L container has a pressure of 800.0 torr. If
1. 4 answers
2. 588 views
A sample of gas has a volume of 50 mL and an initial temperature of 380 K. The temperature must be changed to _____ K in order
1. 4 answers
2. 861 views
the work done by a gas when it expands to 96 L is 4100 J. if the external pressure is 2.0 atm, determine the initial volume of
1. 4 answers
2. 795 views
if the delta h for the reaction A + 2B -> C is 150 kj, delta h for 6A + 12B -> 6C is what?
1. 1 answer
2. 434 views
given the thermochemical equations,B2O3 + 3H2O -> 3O2 + B2H6 delta h = -2035 kj H2O -> H2O delta h = 44 kj H2 + 1/2O2 -> H2O
1. 2 answers
2. 1,264 views
A 20.0% (w/w) aqueous solution of NaOH has a density of 1.125 g/cm^3. What is the molarity (M) of this solution?
1. 3 answers
2. 604 views
1.70 L of 0.550 M H2O2 reacts according to the following reaction.2H2O2(aq) -> 2H2O(l) + O2(g) How much H2O is formed? (molar
1. 4 answers
2. 689 views
When Mg reacts with HCl, it produces MgCl2 and H2(g). If 2.34 g of Mg react, how much MgCl2 is produced (in grams)?
1. 2 answers
2. 599 views
An award is being plated with pure gold before it its presented to a recipient. If the area of the award is 55.0 cm^3 and will
1. 4 answers
2. 624 views
balance the reaction using the half reaction method.OsO4 + C2H4 -> Os + CO2 worksheet does not show if it is in a gas and
1. 2 answers
2. 842 views
business has $15,000 to spend on airline tickets to travel to a conference. It wants 27 of its employees to attend. The business
1. 1 answer
2. 103 views

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