戇戇居士

[匿名]

回覆: 1

2016-07-08 9:20 am

If I want a 2 L solution with a pH of 5, how much acetic acid and how much H2O do I need?

[匿名]

回覆: 1

2016-07-06 7:37 am

The side of quardrants are- AB=13 cm,BC=16 cm, CD=20 cm,DA=5 cm,if BD=12 cm, find area of quardants using heron formula.?

[匿名]

回覆: 12

2016-07-06 4:06 am

Simplify the expression: (x^2 - y^2) / (x^-2 - y^-2)?

[匿名]

回覆: 1

2016-07-05 1:18 pm

what is the correct equation for the reaction between mn+3 and ethanol?

[匿名]

回覆: 2

2016-07-05 7:48 am

Pls help Analytic Geometry Problem?

[匿名]

回覆: 2

2016-07-04 6:06 pm

Calculus Implicit Differentiation: solving for y' (x^4)+(x^2y^2)+(y^3)=5 Answer is: -[2x(2x^2+y^2)]÷[y(2x^2+3y)] What are the steps?

[匿名]

回覆: 1

2016-07-03 6:06 pm

Redox reactions???? PLEASE HELP!!?

[匿名]

回覆: 3

2016-07-03 4:43 pm

If a ball is thrown into the air with a velocity of 42 ft/s?

[匿名]

回覆: 1

2016-07-03 2:05 pm

Which solid type would have both high boiling point and electrical thermal conductivity in the SOLID state?

[匿名]

回覆: 3

2016-07-03 12:57 pm

What is chemistry?

[匿名]

回覆: 1

2016-07-03 12:11 pm

ABCD is a quadrilateral. AB is parallel with DC, and angle A + angle B = 180°. Prove that ABCD is a parallelogram?

[匿名]

回覆: 10

2016-07-03 9:42 am

A car takes 20 mins to cover a distance of 15 km.Calculate its speed in km/h?

[匿名]

回覆: 4

2016-06-30 5:31 pm

how to calculate 2.0 mol of NaNO3?

[匿名]

回覆: 1

2016-06-30 4:45 pm

which point is part of the solution of the inequality y<|x+4|-3?A. -2,1 B.0,0 C. -4,2 D.1,3?

[匿名]

回覆: 3

2016-06-30 11:44 am

s the following sequence arithmetic? If so, identify the common difference. 2.9, 2.7, 2.5, 2.3, . . .?

[匿名]

回覆: 2

2016-06-27 4:07 pm

If 2.400 Moles of calcium nitrate reacts with 393.70g lithium phosphate, how much precipitate in grams will be produced?

[匿名]

回覆: 3

2016-06-26 9:25 pm

Calculus word problem Please Help?

[匿名]

回覆: 1

2016-06-07 3:16 am

http://i63.tinypic.com/332qdn8.jpg - Question 11 why is the answer (b)..?

[匿名]

回覆: 3

2016-06-07 8:25 am

Find the range of values of m for which X^2-mx+4>0 for all real values of x?

[匿名]

回覆: 2

2016-06-06 4:59 pm

Using structural formulae, write equations for the following processes:?

[匿名]

回覆: 1

2016-06-01 4:01 am

1.how many mols of SO2 could be produced from 16.0g of MgSO3 and 45.0ml of .125 HCL? 2.how many moles of excess reactant will remain?

[匿名]

回覆: 2

2016-05-31 10:21 am

How do you integrate 1/((x^2)(sqrt(x^2 + 8))?

[匿名]

回覆: 2

2016-05-31 10:01 am

Evaluate the definite integral. from 4 to 5 of x[root(x-4)] dx?

[匿名]

回覆: 2

2016-05-01 11:21 am

請問如果分辨家中的左青龍右白虎？是站在屋內面對大門來分辨，還是入屋後背着大門分辨？謝謝?

[匿名]

回覆: 1

2016-05-31 7:38 am

1. If 5.2 L of hydrogen and 2.6 L of oxygen at STP react to yield water, how many moles of water are formed?

[匿名]

回覆: 3

2016-05-30 6:30 am

integral of x^2/√1-x dx?

Joanne

回覆: 4

2016-05-29 10:45 am

Hi How do I prove 2 sec^2 y + tan^2 y = 3 sec^2 y - 1? Thanks?

[匿名]

回覆: 2

2016-05-27 3:53 pm

Can somebody please help me find the area of this shape, and how you did it?! ↓↓ http://imgur.com/jvmkfGy?

[匿名]

回覆: 3

2016-05-25 2:50 pm

The lower the pOH, the higher the hydrogen ion concentration.?

[匿名]

回覆: 1

2016-05-25 2:41 pm

K=0.0900, h2o= 0.49 M. And hocl= 0.042 M, What is the equilibrium concentration of Cl2O?

[匿名]

回覆: 2

2016-05-25 2:46 pm

For the reaction CH4 + 2 O2 - CO2 + 2 H2O, how many moles of H2O are formed when 20.0 moles of CH4 are burned? Show all work.?

[匿名]

回覆: 2

2016-05-24 6:57 pm

Adding 1M NaOH into an unknown solution containing 2 of the three ions: Al3+,Zn2+,Mg2+?

[匿名]

回覆: 2

2016-05-24 8:46 pm

aluminum hydroxide with nitric acid gives us?

[匿名]

回覆: 2

2016-05-24 9:11 pm

helpppppppppppppppppp?

[匿名]

回覆: 1

2016-05-24 9:37 pm

0.200N NaOH is titrated against 0.100N HCl. Calculate the pH at the equivalence point. How do you do this with steps? Thank you?

[匿名]

回覆: 1

2016-05-24 10:10 pm

CHEMISTRY QUESTION PLEASE HELP!!!?

[匿名]

回覆: 1

2016-05-25 4:37 am

What mass of CH4 is contained in a 581 mL sample of CH4 at −42◦C and 292 torr?

[匿名]

回覆: 2

2016-05-24 3:56 pm

a test to distinguish magnesium chloride and magnesium sulphate?

[匿名]

回覆: 1

2016-05-23 6:00 pm

Chemistry Homework Help?

[匿名]

回覆: 1

2016-05-23 6:11 pm

If a coin is tossed 24 times and heads comes up 11 times, what is the relative frequency of a heads outcome?

[匿名]

回覆: 3

2016-05-23 12:15 pm

1. Solve for x 24x^3-26x^2+9x-1=0, where 0<x<1.?

[匿名]

回覆: 2

2016-05-17 2:09 pm

NEED URGENT CHEMISTRY HELP!!!!!?

[匿名]

回覆: 1

2016-05-17 5:35 am

How many grams of KCl would I need in order to make 250 mL of a 0.25 M KCl solution.?

[匿名]

回覆: 1

2016-05-17 7:22 am

Under what conditions does an oxidizing agent donate electrons?

[匿名]

回覆: 1

2016-05-16 8:12 am

由靜止開始作等加速度運動，在第2秒與第4秒之位移長度比為多少?

[匿名]

回覆: 1

2016-05-16 8:14 am

由靜止開始作等加速度運動，在第2秒與第4秒之位移長度比為多少. 95台電考題?

[匿名]

回覆: 2

2016-05-12 10:18 am

what is the greatest common factor of 9,25,49?

[匿名]

回覆: 1

2016-05-11 3:00 pm

What is the frequency of reaction having the necessary energy to break this bond?

[匿名]

回覆: 3

2016-05-09 11:36 pm

How many atoms of oxygen (O) are in one formula unit of Mg(NO3)2?

[匿名]

回覆: 1

2016-05-09 10:17 pm

Equilibrium Question.?