賣女孩的火柴

[匿名]

回覆: 2

2021-01-11 11:47 am

Mechanics question?

Ana

回覆: 1

2020-10-13 11:06 am

helppppp please?

[匿名]

回覆: 1

2020-10-13 1:28 am

Chemistry vapour pressure, help!?

[匿名]

回覆: 1

2020-10-13 1:30 am

Chemistry, pressure question help?

[匿名]

回覆: 2

2020-09-30 4:06 pm

math answer?

[匿名]

回覆: 1

2020-09-30 3:23 pm

Which is the longer bond, a carbon–hydrogen bond in ethene or a carbon–hydrogen bond in ethane? Why?

[匿名]

回覆: 3

2020-09-30 1:31 pm

shows that sinx tanx maybe written as 1-cos2x / c osx?

[匿名]

回覆: 1

2020-09-24 12:26 am

Combustion analysis of 2.796 g of an unknown compound containing carbon, hydrogen, and oxygen produced 5.597 g of CO2 and 2.268 g of H2O. ?

[匿名]

回覆: 1

2020-09-24 12:11 am

Antacid Analysis... General Chem 2?

[匿名]

回覆: 2

2020-09-24 12:09 am

One tablet contains 19.0 mg of thiamine. You weigh a tablet and determine that the mass is 0.845 g. ?

[匿名]

回覆: 2

2020-09-24 12:02 am

math problem?

[匿名]

回覆: 2

2020-09-21 3:04 pm

The density of palladium is 12.0 g/cm 3. The unit cell of Pd is a face-centered cube. Calculate the atomic radius of Pd?

[匿名]

回覆: 1

2020-09-21 6:43 am

Titration question?

[匿名]

回覆: 2

2020-09-21 1:02 am

What is the name of the covalent compound NCl3? Enter the name of the compound.?

charles

回覆: 2

2020-09-14 4:49 pm

Please help urgent chemistry homework I need the work ?

charles

回覆: 2

2020-09-14 1:36 pm

chemist makes 80.0g sulf trioxide by combining 50.0g oxygenwithunknown amountofsulfur.How chemistmake 100.0g sulf trioxide with no leftovers?

[匿名]

回覆: 8

2020-09-13 11:14 pm

at t=30, the temperature of an oven is 120 degrees and increasing by 2 degrees/minute. What is the temperature at t=40?

[匿名]

回覆: 1

2020-09-09 10:46 am

Decomposition of Formic Acid?

[匿名]

回覆: 3

2020-09-09 12:16 pm

A person travels by car from one city to another with different constant speeds between pairs of cities. ?

[匿名]

回覆: 3

2020-09-09 12:00 pm

What is the maximum mass of chromium, Cr, that can be extracted from 76g of chromium (III) oxide?

[匿名]

回覆: 2

2020-09-09 11:31 am

A 100.g piece of silver (SH= 0.240 J/g C) with an initial..?

[匿名]

回覆: 1

2020-09-06 11:08 am

Chemistry conversion ?

[匿名]

回覆: 2

2020-09-06 10:39 am

Who wants to help my nephew? does anyone know how to solve this thing?

[匿名]

回覆: 1

2020-09-06 10:13 am

Limiting Reactant Help!?

[匿名]

回覆: 2

2020-08-30 2:24 am

 急！！求解高一數學！?

Wen

回覆: 1

2020-08-30 2:36 am

求高一數學詳解，急！謝謝！！?

Irene

回覆: 1

2020-08-31 1:17 pm

A student carry out Qualitative Analysis test on hydrated salt and concluded that it contain K+, Cr3+, and SO42- ions?

[匿名]

回覆: 2

2020-08-31 11:19 am

Please tell me, what is equilibrium?

[匿名]

回覆: 1

2020-08-26 2:22 pm

find the current Is?

[匿名]

回覆: 2

2020-08-26 3:50 pm

The boiling point of ammonia is?

[匿名]

回覆: 1

2020-08-26 1:00 pm

When 47.2 J of heat is added to 14.0 g of a liquid, its temperature rises by 1.78 ∘C.?

[匿名]

回覆: 2

2020-06-02 11:54 pm

Please give the oxidation number of following ?

[匿名]

回覆: 1

2020-06-01 8:58 pm

CHEM HELP ASAP PLEASE!?!?

[匿名]

回覆: 1

2020-06-01 8:59 pm

Chem help asap please explain ?

[匿名]

回覆: 4

2020-05-16 11:35 pm

What is the molar it y if a solution containing 85.3 g of silver perchlorate dissolved in 927 g of benzene?

[匿名]

回覆: 2

2020-05-16 8:39 pm

which molecule or ion below has a lewis structure that does not obey the octet rule?

[匿名]

回覆: 1

2020-05-16 9:24 pm

assume that calcium salts exist asCa(HCO3)2 in water write an equation showin the reaction taking place in wat when Na2CO3 is added to water?

[匿名]

回覆: 2

2020-05-06 10:46 am

Impartial differentiation?

[匿名]

回覆: 1

2020-05-06 10:41 am

please help?

[匿名]

回覆: 1

2020-05-05 10:46 pm

How to do this?

[匿名]

回覆: 1

2020-04-24 10:32 pm

what is the equilibrium constant for this reaction?

[匿名]

回覆: 3

2020-04-24 12:37 pm

how would you solve for the tangent line to the graph of ???? = ????^X which has a slope of 3?

[匿名]

回覆: 1

2020-04-24 11:45 am

The laws of refraction and reflection are the same for sound and for light. The speed of sound is 340 m/s in air and 1510 m/s in water. ?

[匿名]

回覆: 2

2020-04-24 11:32 am

Chemistry?

[匿名]

回覆: 5

2020-04-14 9:49 pm

Sum the series of n terms 1 + 3 + 7 + 15 + 31 .... to n terms?

[匿名]

回覆: 1

2020-04-14 9:12 pm

What’s the systematic iupac name ?

[匿名]

回覆: 1

2020-04-14 2:43 pm

chem help?

[匿名]

回覆: 3

2020-04-08 7:56 pm

Find a set of polar coordinates for the point for which the rectangular coordinates are given. (3, -3 roots of 3  )?

[匿名]

回覆: 5

2020-04-08 6:13 pm

can you solve this question?

[匿名]

回覆: 1

2020-04-08 2:21 pm

The graph of the derivative f '(t) of f(t) is shown. Compute the total change of f(t) over the given interval. [18, 54]?