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Chemistry ?

how much temperature does it take to boil 17 grams of ammonia in 500 grams of water?

How are these R configurations for 2-bromo-3-methylpentane found?

PLEASE HELP!!! (Physics 11)?

math word problem?

Find a value of alpha  in the interval [0 degrees, 90 degrees] that satisfies the given statement: cot alpha  = 1.4895954.  ?

Are the two carbon atoms of C2H6 equivalent? Briefly explain the evidence for your answer.?

chem question can someone answer please?

Pre-Calc 12 Trig Functions?

Trig Functions?

Ammonia is made by the Haber process. The reactants are nitrogen and hydrogen.  ?

math qss?

Chemistry Question How does this work?

Help Please Super I'm Stuck Grade 12 Chemistry Question!!?

RATIO & PROPORTIONS: ....?

How many grams of water (H2O) have the same number of oxygen atoms as 7.0 mol of oxygen gas?

A sample of neon gas at a pressure of 0.702 atm and a temperature of 241 °C, occupies a volume of 518 mL. ?

how do you solve if x(5+root7) is a rational number then x must be equal to?

 HCF of 45,120 and 355?

 If a=i+7j+k and b=i+17j+k, find a unit vector with positive first coordinate orthogonal to both a and b.?

A sample of krypton gas at a pressure of 982 mm Hg and a temperature of 30 °C, occupies a volume of 7.68 liters.?

The equation of a curve is  d^2y / dx^2 = 2x-1. Given that the curve has a minimum point at (3, -10), find the coordinates of maximum point.?

An object 4.56 centimeters tall is placed 78.3 centimeters in front of a diverging lens. The lens has a focal length of 45.9 centimeters. ?

ab= cde To Solve the equation above for c, you multiply both sides of the equation by the same expression ab x ? = cde x ? C= ?

i m not sure about exact solution please help me out?

A right triangle has an acute angle measure of 22°. Which two numbers could represent the lengths of the legs of this triangle?

Chemistry Multiple choice help? Compare answers! 4 questions. ?

What is the chemical composition of normal acid rain, and what kinds of harm might acid rain bring to humans? Thanks?

 If a=i+j+4k and b=i+j+2k Compute the cross product a×b.?

Answer the question in the photo below!?

How to prove?

Potassium Manganate & Potassium Permanganate?

Calculate the solubility of magnesium fluoride, MgF2, in water by knowing the Ksp = 5.2 x 10-11?

what mass of LiOH must be added to 750.0 mL of 0.0550 M HCl to create a mixture having a pH of 2.500?

physics power problem explanation, please!?

Charle's law ?

Express As Function of x?

Proving problem?

Solve the equation (tan theta -1) ÷ (tan theta +1) = tan theta , for 0⁰ =< theta =< 180⁰?

A sample of O2 wa @ 397K was heated to 433K. If the volume of the oxygen gas sample @ 433K is 636.1mL, what is the volume @ 379k? ?

Prove that tan(20)+4sin(20)=√3?

Trig help ?

What would a force diagram of a car in a head-on collision into a wall look like ?

A certain reaction has an activation energy of 60.0 kJ/mol and a frequency factor ?

In an equilateral triangle ABC, AD is altitude drawn from A on side BC. prove that (AB/AD)² = 4/3 .?

{(3/4)^1.5} *{(2/3)^1.5} math question?

Help me with Maths. It’s for a good cause. ?????

Chemistry Help?

The probability that a page of book contains a typo is 0.2 and only one typo may occur in a page. If 13 pages of that book are selected, ?

Copper sulphate hydrated questions related to Number of moles?