不用客氣

[匿名]

回覆: 2

2017-02-12 12:06 pm

What is the percent composition of each element in one molecule of benzoic acid (C7H6O2)?

[匿名]

回覆: 3

2017-02-06 2:20 pm

氯化鈉的結構式是什麼？

[匿名]

回覆: 2

2017-02-10 2:12 pm

sketch and label a rectangle that has an area of 36 square centimeters and that has two sides that are each longer than 20 centimeter?

[匿名]

回覆: 3

2017-02-10 1:38 am

Substitution Method for Quadratic?

[匿名]

回覆: 1

2017-02-08 3:42 pm

find the principal argument of 1+2i/1-(1-i)^2?

[匿名]

回覆: 1

2017-02-08 12:25 pm

AP Chem HW?

[匿名]

回覆: 1

2017-02-07 6:16 pm

Y=8cos^-1(sin 2x) Dy/dx and simplify?

[匿名]

回覆: 6

2017-02-07 5:30 pm

Please help! If (x+1) and (x-2) are factors f(x)=x^3+ax^2+bx+2, find the values of a and b and find the other factor?

[匿名]

回覆: 1

2017-02-07 1:50 pm

Indicate if the following are the correct ground state electron configurations for the atom listed by selecting correct or incorrect.?

[匿名]

回覆: 5

2017-02-03 7:04 pm

A ladder rests against the top of a perpendicular wall of a ...?

[匿名]

回覆: 1

2017-02-03 1:03 am

A sample contains 9.81g zn, 1.8(10)rais to power 23 atoms of cr and 0.6 g-atoms of oxygen. what is its empherical formullah?

[匿名]

回覆: 5

2017-02-01 1:13 am

In an arithmetic sequence, t3 = 15 and s8 = 168, find the simplified expression of tn.?

[匿名]

回覆: 2

2017-01-31 1:56 pm

An electrical discharge between a cloud and a lightening rod has a current of 2150 A for a time of 4.50 ms.?

[匿名]

回覆: 1

2017-01-31 12:33 am

How does 5d orbital of Au atom counts 10 electrons ? I count only 9?

[匿名]

回覆: 1

2017-01-30 2:36 pm

Chemistry problem with no help from professor?

[匿名]

回覆: 1

2017-01-25 12:44 pm

Sin integral problem help!! sin2x/2sinx?

[匿名]

回覆: 2

2017-01-25 12:44 am

What is the empirical formula, did I do this question correctly?

[匿名]

回覆: 2

2017-01-24 8:37 pm

Why salt bridge is used in a voltaic cell?

[匿名]

回覆: 1

2017-01-24 1:51 pm

Consider the set of the following measurements: 12.3 g 12.4 g 12.5 g 12.0 g 12.2 g. Calculate the average value of the measurements.?

[匿名]

回覆: 1

2017-01-24 12:32 am

Are lipids sugars?

[匿名]

回覆: 1

2017-01-20 7:04 pm

Math Question?

[匿名]

回覆: 1

2017-01-20 2:22 pm

chem question?

[匿名]

回覆: 2

2017-01-18 1:55 pm

X^2-15=0. Find solutions?

[匿名]

回覆: 2

2017-01-18 1:40 pm

192 divided by pi r squared?

[匿名]

回覆: 2

2017-01-18 1:00 am

If 4a=5b and 8b=9c find a:b:c.?

[匿名]

回覆: 1

2017-01-17 7:31 pm

elastic energy help?

[匿名]

回覆: 4

2017-01-17 7:13 pm

Help required in division?

[匿名]

回覆: 3

2017-01-17 12:44 pm

A container has a volume of 2.79 L and a pressure of 5.97 atm. If the pressure changes to 1460 mm Hg, what is the container’s new volume?

[匿名]

回覆: 2

2017-01-17 1:22 am

What is the work associated with decomposition of trinitrotoluene (TNT) upon detonation according to the following reaction at 307.95 K?

[匿名]

回覆: 11

2017-01-17 1:39 am

what is an organic compound that has the ratio of H:O = 2:1?

[匿名]

回覆: 3

2017-01-16 1:05 am

three dice are numbered 1 to 6 two of them are red and one is blue. all three dice are rolled.?

[匿名]

回覆: 1

2017-01-13 9:51 pm

chem please Please use bca table?

[匿名]

回覆: 2

2017-01-13 2:15 pm

Please assist me with this physics/chemistry question?

[匿名]

回覆: 1

2017-01-11 4:29 pm

volume of a gas is doubled when temperature raised from 0 C to 273 K. why?

[匿名]

回覆: 1

2017-01-11 11:24 am

Consider the reaction: N2(g) + 3 H2(g) --> 2 NH3(g).?

[匿名]

回覆: 2

2017-01-11 9:49 am

425 in scientific notation?

[匿名]

回覆: 2

2017-01-10 11:03 pm

Analysis of Transition Metal Oxalate Complex Salt Hydrate?

[匿名]

回覆: 1

2017-01-10 5:11 pm

Reactive Metal Fires?

[匿名]

回覆: 3

2017-01-10 3:36 am

Can somebody please help me. I don't understand how to even solve this problem or even get the correct answer.?

[匿名]

回覆: 3

2017-01-06 10:34 am

why is chlorine have a higher ionization than sulfur?

[匿名]

回覆: 3

2017-01-06 2:36 pm

CHEMISTRY HELP?

[匿名]

回覆: 2

2017-01-04 3:09 pm

Why atomic size of sodium is larger than oxygen?

[匿名]

回覆: 2

2016-12-31 1:38 pm

300 mL of a 1.65 M HCl solution has a density of 1.50 g/mL. Express the conclusion of this solution in:?

[匿名]

回覆: 2

2016-12-16 8:17 pm

Which electron configuration contains three half-filled orbitals? (A) 1s2 2s2 2p6 (B) 1s2 2s2 2p5 (C) 1s2 2s2 2p3 (D) 1s2 2s2 2p4?

[匿名]

回覆: 1

2016-12-14 10:34 am

Calculate the concentrations of ALL solute species in 0.25 M H3PO4(aq). Ka1 = 7.3 x 10-3, Ka2 = 6.2 x10-8, Ka3 = 2.1 x 10-13?

[匿名]

回覆: 3

2016-12-13 8:03 pm

What chemical reaction occurs when sodium chloride is formed?

[匿名]

回覆: 1

2016-12-13 9:53 am

the half-life of a 20.0g sample of a radioactive substance is 15 hours. What is the half-life of a 5.0g sample of the same substance?

[匿名]

回覆: 1

2016-12-07 5:37 pm

what mass of O2 is needed to react with 5.95 g of NH3?

[匿名]

回覆: 2

2016-12-06 5:11 pm

Sn1 or Sn2?

[匿名]

回覆: 1

2016-12-02 4:12 pm

Plz help Fe2O3(s) + CO(g) Fe(l) + CO2(g) How many grams of Fe2O3(s) will be required to produce 1.20 moles of Fe(l) in the above reaction?