戇戇居士

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回覆: 4

2017-01-29 1:58 pm

A ball is thrown straight up with an initial speed of 9.90 m/s. How much time elapses until the bowling pin returns to the juggler's hand?

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2017-01-25 11:43 am

Chemistry Question?

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2017-01-25 12:26 am

How many ml of 0.308-M Na3PO4 are required to deliver 46.1 mmol Na1+ ions?

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2017-01-24 7:40 pm

Find the angle.?

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2017-01-24 7:24 pm

adeline has 4 numbers 1, 5, 0, 7 how many numbers can she makes?

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2017-01-24 11:43 am

The decomposition of sulfuryl chloride (SO2Cl2) is a first-order process. The rate constant for the decomposition at 660 K is 4.5×10−2s−1.?

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2017-01-24 11:33 am

More Chemistry!?

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2017-01-22 11:47 pm

Chemical ratio?

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2017-01-20 5:20 pm

Math word problem help?

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2017-01-20 2:08 pm

The density of iron is 7.87 g/mL. What is the mass of a 2.00cm x 4.00cm x 1.00cm block of iron?

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2017-01-18 12:43 pm

Physics problem help please?

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2017-01-18 12:12 am

Complete the analogy: liquid:mercury::solid:?

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2017-01-17 2:40 pm

Evaluate the algebraic expression : 9+2(x−7)^2 when x=9?

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回覆: 10

2017-01-17 12:29 pm

PRE CALC HELP!!!!?

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2017-01-17 1:01 am

What is wrong with each of the following cycloalkane names using IUPAC rules?

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2017-01-15 11:44 pm

chem help?

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2017-01-13 9:09 pm

Chem please? Please include all work?

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2017-01-12 7:37 pm

Which of the following is true regarding vapor pressure of a liquid?

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2017-01-11 4:22 pm

At a certain temperature, the equilibrium constant for the following chemical equation is 3.50. At this temper?

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2017-01-11 1:12 pm

Chem: Using Le Chatelier's principle, predict the direction of the net reaction in each of the following..?

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2017-01-11 11:28 am

Can someone please help me with this IUPAC name? https://postimg.org/image/69fyr6ikv/ Thank you!?

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2017-01-11 10:51 am

AP Chemistry Lost?

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2017-01-10 10:21 pm

How do you obtain the fractional abundances for two naturally occurring isotopes?

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2017-01-10 5:12 pm

A cubic piece of metal measures 4.50 cm on each edge. If the metal is nickel, whose density is 8.90 g/cm3, wha?

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2017-01-10 2:23 am

Why are relative atomic masses used rather than actual masses of atoms?

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2017-01-05 10:16 pm

The compound CH2F2 has polar bonds present. Which of the following intermolecular forces are holding the molecules together?

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2017-01-03 11:40 am

Chemistry Help: Common Ion Effect?

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2017-01-03 4:40 pm

please give solution?

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2017-01-01 4:45 pm

IF solubiltiy of BaSO4 in water is 8 8 10^-4 mol dm^-3, calculate its solubility in 0.01 mol dm^-3 of H2SO4?

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2016-12-16 4:41 pm

Write a nuclear equation for beta decay of sodium-22?

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2016-12-16 4:43 pm

Nuclear equation for the beta decay sodium-22?

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2016-12-14 10:30 am

Calculate the density of each of the following gases:?

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2016-12-13 10:59 pm

Al+HCl ---------> ?

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2016-12-13 2:27 pm

How many equivalents are in 12.0 mL of 0.16 M Ba(OH)2 solution?

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2016-12-13 12:26 pm

How many milliliters of 0.750 M H2SO4 solution is needed to react with 55.0 mL of 2.50 M KOH solution?

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2016-12-13 9:55 am

Chemistry help?

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2016-12-06 4:23 pm

Write balanced chemical equations for the following: a) The dissociation in water of the ionic compound Ca3(PO3)2 (Calcium Phosphite).?

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2016-12-02 4:29 pm

4 Fe(s) + 3 O2(g)= 2 Fe2O3(s) What mass of O2 is required to oxidize 4543 g of iron to iron (III) oxide?

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2016-11-26 12:20 pm

Which of the following reactions is an example of beta particle emission?

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2016-11-23 10:00 am

if 4 grams sodium chloride dissolve in 200ml, whats the concentration of sodoum chloride in the water.?

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2016-11-22 2:21 pm

How many calories of heat?

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2016-11-21 2:10 am

What is the bond order of HBr?

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2016-11-17 12:05 pm

Calculate the mass of 0.2 (mol) of an oxygen atom? I'm thinking the answer is 3.2 (g) am I right?

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2016-11-13 9:02 am

how many moles of NO2 form when ea amt of reactant completely reacts 2N2O5(g)→4NO2(g)+O2(g) 5.26×103molN2O5 use 3 significant figures.?

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2016-11-09 2:11 am

500.0 mL of 0.160 M NaOH is added to 535 mL of 0.200 M weak acid (Ka = 2.51 × 10-5). What is the pH of the resulting buffer?

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2016-11-08 1:41 pm

Based on this equation 4NH3+5O2=4NO+6H2O How many grams of NO can be produced by reacting 0.650 moles of O2 with 9.88 grams of NH3?

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2016-11-04 5:14 am

Write equations that show the processes that describe the first, second, and third ionization energies for a gaseous iron atom.?

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2016-11-04 2:23 am

Given that the compound’s empirical formula is CH2, what is the molar mass of the compound?

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2016-11-02 4:34 pm

What volume of oxygen will react with 50 cm3 of nitrogen monoxide??

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2016-11-02 1:43 am

When a 19.34 gram piece of lithium is placed in a sample of water, how many grams of hydrogen gas are?