賣女孩的火柴

[匿名]

回覆: 3

2020-04-06 11:31 pm

(Sqrt8 + sqrt12)(sqrt48 + sqrt18)?

[匿名]

回覆: 2

2020-04-06 12:46 pm

How does the answer end up 0.4 in this hypergeometric question?

[匿名]

回覆: 1

2020-04-06 10:06 am

Chemistry: E (0) From Reduction?

[匿名]

回覆: 3

2020-04-06 12:29 am

Chemistry help please? ?

[匿名]

回覆: 1

2019-08-03 7:32 pm

Some chemistry questions? did I answer them right?

[匿名]

回覆: 1

2019-04-29 8:50 pm

Given equilibrium: 2NO2(g) <-> N2O4(g)?

[匿名]

回覆: 1

2016-06-30 8:43 pm

Give two reactants in which the following product might be formed. a. calcium phosphate - b. barium sulfate -?

[匿名]

回覆: 8

2016-04-26 5:55 am

Use an appropriate Half-Angle Formula to find the exact value of the expression. cos 112.5°?

[匿名]

回覆: 1

2016-03-02 2:33 pm

Calculate pH of 1×10^-3M solution of H2SO4?

[匿名]

回覆: 2

2016-03-02 8:09 am

I need help with some physics?

[匿名]

回覆: 2

2016-03-02 8:04 am

In how many ways can 7 friends accomodate to 1 triple, 2 double hotel rooms. (Probability counting technique)?

[匿名]

回覆: 2

2016-03-02 5:30 am

Which is more acidic- ethanol or phenol? Explain.?

[匿名]

回覆: 4

2016-03-02 6:34 am

Does anyone know how to verify (1-tan^2x)/(1-cot^2x) = (1-sec^2x)?

[匿名]

回覆: 1

2016-03-02 5:39 am

How many moles of H2 are needed to produce 10.60 g of NH3?

[匿名]

回覆: 1

2016-03-02 6:05 am

Physics Question?

[匿名]

回覆: 2

2016-03-02 6:17 am

PLZ Facror out 2x^2 -3x -2?

[匿名]

回覆: 2

2016-03-02 5:57 am

three part math question can someone please help?

[匿名]

回覆: 3

2016-03-02 5:47 am

How many formula units of lithium nitrate are produced if 4.5 moles of lithium hydroxide react. BE: Fe(NO3) + 3LiOH => Fe(OH)3 + 3LiNO3?

[匿名]

回覆: 1

2016-03-02 5:40 am

how many molecules are in 19.9 g NO2?

[匿名]

回覆: 1

2016-03-02 4:17 am

Chemistry?

[匿名]

回覆: 1

2016-03-02 4:06 am

How many grams of CaH2 are needed to generate 20.0 L of H2 gas if the pressure of H2 is 740 torr at 18 degrees C?

[匿名]

回覆: 1

2016-03-02 3:31 am

What will happen to the pH of an acetic acid solution when chloride ion is added? a) pH decreases b) pH increases c) pH remains unchanged?

[匿名]

回覆: 1

2016-03-02 3:41 am

Stoichiometry. Which of the following contains the greatest number of moles?

[匿名]

回覆: 2

2016-03-02 3:34 am

50 mL of 2M H2SO4 are combined with 100 mL of 1M KOH. What is the pOH of the resulting solution?

[匿名]

回覆: 1

2016-03-02 3:28 am

Rank the compounds in order of increasing numbers of atoms: (a) C12H22O12, (b) DNA, (c) Pb(C2H3O2)2.?

[匿名]

回覆: 1

2016-03-02 3:18 am

A word problem on pH and Ka with mixtures? I think we're doing intro to buffers but I'm just not familiar with it at all?

[匿名]

回覆: 2

2016-03-02 2:55 am

In chromatography if measurements were made in inches instead of centimeter, how would the Rf values be affected?

[匿名]

回覆: 1

2016-03-02 2:45 am

Finding a concentration of a solution?

[匿名]

回覆: 1

2016-03-02 2:48 am

Chemistry help please?

[匿名]

回覆: 4

2016-03-02 2:29 am

What's 1 over 4x squared - 4x - 7= -7 when you're solving for x?

[匿名]

回覆: 2

2016-03-02 1:42 am

Chem101 Heat Transfer?

[匿名]

回覆: 1

2016-03-02 1:34 am

AB is diameter of a circle centre O X is a point on circle and AX is produced to Y such that OX=XY Prove that YOB is 3x size of angle XOY?

[匿名]

回覆: 2

2016-03-02 1:23 am

Physic's Question, Please answer?

[匿名]

回覆: 2

2016-03-02 1:00 am

Use implicit differentiation to find an equation of the tangent line to the curve at the given point.?

[匿名]

回覆: 1

2016-03-01 1:32 pm

is it ca(hco3) is soluable in water?

[匿名]

回覆: 5

2016-03-01 1:37 pm

Systems of Linear Equations in Two Variables Question 2?

[匿名]

回覆: 3

2016-03-01 12:15 pm

The vertices of a quadrilateral are at A(3,8),B(-5,-2),C(2,-7) and D(9,7).?

[匿名]

回覆: 1

2016-03-01 11:18 am

Hess' Law?

[匿名]

回覆: 2

2016-03-01 11:52 am

Quick Chemistry Help Needed. Thanks!!?

[匿名]

回覆: 1

2016-03-01 12:51 pm

Help with Chem! Write the molecular, ionic and net ionic equations for the following reactions. Include phase labels on all species.?

[匿名]

回覆: 2

2016-03-01 12:38 pm

a body of weight 20N floats half submerged in a liquid.what is the bouyant force on the body?

Bob

回覆: 3

2016-03-01 11:28 am

integral x^2/3x-5 dx?

[匿名]

回覆: 1

2016-03-01 10:42 am

What is the mechanism to form methyl 3-nitrobenzoate from methyl benzoate, nitric acid and concentrated sulfuric acid?

[匿名]

回覆: 2

2016-03-01 8:53 am

MATHS QUESTIONS!!!!!?

[匿名]

回覆: 3

2016-03-01 7:10 am

Trigonometry problem, please help?

[匿名]

回覆: 2

2016-03-01 5:09 am

A balloon is filled with helium. Its volume is 3.40 L at 36 degrees C. What will its volume be at 93 ∘C, assuming no pressure change?

[匿名]

回覆: 1

2016-03-01 6:47 am

Molarity problem?

[匿名]

回覆: 1

2016-03-01 6:17 am

what is the molecular geometry of SCl2?

[匿名]

回覆: 1

2016-02-29 9:57 pm

Please help with these chemistry questions?

[匿名]

回覆: 1

2016-02-29 9:37 pm

Quadratic formula... anyone able to help?