戇戇居士

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

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.?

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

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

Pls help Analytic Geometry Problem?

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?

Redox reactions???? PLEASE HELP!!?

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

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

What is chemistry?

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

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

how to calculate 2.0 mol of NaNO3?

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?

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

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

Calculus word problem Please Help?

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

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

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

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?

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

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

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?

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?

integral of x^2/√1-x dx?

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

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

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

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

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.?

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

aluminum hydroxide with nitric acid gives us?

helpppppppppppppppppp?

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?

CHEMISTRY QUESTION PLEASE HELP!!!?

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

a test to distinguish magnesium chloride and magnesium sulphate?

Chemistry Homework Help?

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

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

NEED URGENT CHEMISTRY HELP!!!!!?

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

Under what conditions does an oxidizing agent donate electrons?

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?

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?

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

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

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

Equilibrium Question.?