不用客氣

[匿名]

回覆: 1

2017-06-04 2:36 pm

Are resonance structures sp, sp2, sp3 hybridized?

[匿名]

回覆: 3

2017-06-03 2:21 pm

H2O2 to H2O?

[匿名]

回覆: 2

2017-05-30 4:31 pm

how many grams of kcl would you need to weight out to prepare 0.25 l of 2.00 m kcl solution?

[匿名]

回覆: 1

2017-05-27 7:52 pm

Can you take this math question?

[匿名]

回覆: 1

2017-05-20 12:44 am

what is more likely to dissolve in acidic solution, silver chloride or sliver sulfide? Why?

[匿名]

回覆: 2

2017-05-18 12:26 am

how many mL of 0.200 M of aluminum chloride solution will contain 6.00 millimoles of chloride ions?

[匿名]

回覆: 2

2017-05-17 2:43 pm

In a reaction if the concentration of reactant A is tripled the rate of the reaction is becomes 27 times. What is the order of the react?

[匿名]

回覆: 1

2017-05-12 12:10 pm

Calculate. The number of moles of hydrochloride acid produced from 10mol of hydrogen according to the following equation.. H2 + Cl2 -> 2HCl?

[匿名]

回覆: 1

2017-05-10 8:32 am

why does C3H8 have a higher boiling point than ClF?

[匿名]

回覆: 3

2017-05-10 12:59 am

Find the ordered triple of these equations. x - 2y + 3z = -3 2x - 3y - z = 7 3x + y - 2z = 6?

[匿名]

回覆: 4

2017-05-10 12:52 am

Determine sin A and cos A, to the nearest tenth.?

[匿名]

回覆: 1

2017-05-09 11:04 pm

Conjugate bases and acids for the following?

[匿名]

回覆: 7

2017-05-07 10:24 pm

Why is 0! equal to 1?

[匿名]

回覆: 2

2017-05-04 10:50 pm

A sample of propane, C3H8, contains 17.7moles of carbon atoms. How many total moles of atoms does the sample c?

[匿名]

回覆: 2

2017-04-26 10:38 am

Copper(II) Sulfate forms a bright blue hydrate with the formula CuSO4 ·n H2O(s). If this hydrate is heated to?

[匿名]

回覆: 3

2017-04-26 8:23 am

how many molecules are there in 345 grams of carbon dioxide?

[匿名]

回覆: 2

2017-04-25 7:23 pm

Heat of formation?

[匿名]

回覆: 2

2017-04-25 12:38 pm

A balloon contains 125.0ml of hydrogen at 631 mm Hg at 36 degrees Celsius. What is the volume of the gas at 417 m Hg and 31 degrees celcius?

[匿名]

回覆: 1

2017-04-15 12:25 am

Could someone please answer this chemistry question?

[匿名]

回覆: 3

2017-04-12 11:15 am

Write the formula and name of compound formed by the following combinations of ions: Cu+ and S2-?

[匿名]

回覆: 2

2017-04-05 4:04 pm

Estimate the charge on 46g of Na+?

[匿名]

回覆: 1

2017-04-01 11:42 am

___ H2SO4 + ___NH3 ®___ (NH4)2SO4. What mass of ammonium sulfate will result from the reaction of 5.00 g of NH3?

[匿名]

回覆: 1

2017-03-29 3:12 pm

Please help?

[匿名]

回覆: 1

2017-03-29 1:55 pm

3NO2(g) + H2O(l) = 2HNO3(aq) + NO(g) a) How many moles of nitrogen dioxide (NO2) react completely with 4 moles of water (H2O) ?

[匿名]

回覆: 1

2017-03-27 2:07 pm

A sample of propane, C3H8, contains 17.0 moles of carbon atoms. How many total moles of atoms does the sample contain?

[匿名]

回覆: 2

2017-03-24 5:21 pm

Writing total ionic reaction and net ionic reaction?

[匿名]

回覆: 1

2017-03-19 3:52 pm

Explain: Diethyl aniline is more basic than Aniline?

[匿名]

回覆: 2

2017-03-15 2:35 pm

Al2(So4)3 its solubility =6.2×10^-3gr/L?

[匿名]

回覆: 1

2017-03-15 2:37 pm

Al2(So4)3 its solubility =6.2×10^-3? Calculate solubility product?

[匿名]

回覆: 4

2017-03-14 8:03 pm

given 2sin(theta)cos(theta)+cos(theta)=0. Find Theta.?

[匿名]

回覆: 1

2017-03-10 11:46 pm

prepare 0.350 L of 0.900 M HCl solution, starting with a 2.00 M HCl solution. What volume (in L) of the 2.00 M solution will you need?

[匿名]

回覆: 1

2017-03-10 2:22 pm

Chemistry help?

[匿名]

回覆: 2

2017-03-08 6:18 pm

3 Variable simultaneous equations help.?

[匿名]

回覆: 11

2017-03-08 1:18 pm

is Fe2O3+3H2--->2Fe+3H2O a redox reaction?

[匿名]

回覆: 1

2017-03-01 12:49 pm

When heated, potassium chlorate, KClO3, melts and decomposes to potassium chloride and diatomic oxygen.?

[匿名]

回覆: 1

2017-02-27 3:26 pm

Is this a... decomposition reaction: Fe2O3(s) + C(s) à CO(g) + Fe(s)?

[匿名]

回覆: 3

2017-02-26 10:52 pm

Find the acute angle in radians?

[匿名]

回覆: 4

2017-02-25 11:06 pm

The base of a triangle is one half of its height. If the area of the triangle is 196 square millimeters. How do you find the height?

[匿名]

回覆: 4

2017-02-25 2:57 pm

Integrate x^7/ x+1?

[匿名]

回覆: 2

2017-02-24 5:01 pm

Make {p} the subject of the formula D/d=f + p/f - p?

[匿名]

回覆: 5

2017-02-24 5:01 pm

Make {p} the subject of the formula D/d=f + p/f - p?

[匿名]

回覆: 3

2017-02-24 2:29 pm

Please help me solve this trigonometry problem!?

[匿名]

回覆: 2

2017-02-21 8:08 pm

Use integration by parts to find the exact value of: ∫ (upper limit 2, lower limit 1) 4x^3 ln2x ?????????

[匿名]

回覆: 1

2017-02-21 4:56 pm

Calculate the volume occupied by 75.0 g of Iridium?

[匿名]

回覆: 1

2017-02-20 4:39 pm

In electrochemical cell, when discharge happens here, how do you write the half equations?

[匿名]

回覆: 2

2017-02-17 2:08 pm

How do I use the Arrhenius equation to find k, if the Ea is known?

[匿名]

回覆: 1

2017-02-17 8:26 am

7. Consider the combustion reaction of ethane. a. Write a balanced chemical reaction.?

[匿名]

回覆: 2

2017-02-15 1:54 pm

HELP ME PLEASE ASAP!! One cup of fresh orange juice contains 132 mg of ascorbic acid (vitamin C, C6H8O6).?

[匿名]

回覆: 2

2017-02-15 1:13 am

How many moles are present in 4g of KOH??? ( K = 39u, H - 1u, 0 - 16u)?

[匿名]

回覆: 2

2017-02-12 9:55 pm

Consider the following equilibrium reaction that is taking place in a 5.00 L container at 25 oC: 2SO2 (g) + O2 (g) --> 2SO3 (g)?