10/24/19

what is the molality of nitric acid in a concentrated solution of nitric acid (68% HNO3 by mass)?
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10/16/19

AP Chemistry Question
Which of the following ions has the same number of electrons as Br -. A. Ca2+B. K+C. Sr2+D I-E Cl-
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10/14/19

Gas Law Problem 1.1
Calculate the volume (in liters) occupied by 8.50 g of NH3 at STP.
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10/03/19

A HCl is titrated with a NaOH solution of known concentration. How much volume of NaOH 0.120 M is necessary to neutralize 14.00 mL of HCl 0.500 M.
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10/02/19

Teresa made $176 for 11 hours of work. At the same rate, how many hours would she have to work to make $128?
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10/02/19

I am struggling with the idea of electrolisis
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10/02/19

Plasmodesmata is made of
Biology ntse questions. Very important and needed urgently.
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10/02/19

Simplifying Mole Ratios
I was balancing and finding the mole ratio for octane to carbon dioxide in a combustion reaction of octane and it gave me 2:16, do I simplify it?
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10/01/19

Determine the number of grams of C4H10 that are required to completely react to produce 8.70 mol of CO2 according to the following combustion reaction: 2C₄H₁₀(g) + 13O₂(g) →8 CO₂(g) +10 H₂O(g)
I can't do this problem and I've been trying to figure out the conversion factors for ages but I'm stuck
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10/01/19

Why copper does not react with hydrochloric acid but reacts with sulphuric acid why what's the reason?
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10/01/19

Gibbs Free Energy-Carnot cycle
For Adiabatic Process in a Carnot engine(Reversible). We know that ds=o since q= 0 so for Gibbs Free: DeltaG=H-TdS , can we cancel dS since its zero and have it as DeltaG=H??
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09/30/19

Given that Kb for CH3CH2NH2 is 6.3×10−4 at 25 °C, what is the value of Ka for CH3CH2NH3+ at 25 °C?
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09/18/19

What is the slope of -5x-8y=6
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09/18/19

Asking your best friend to write a poem for you and then turning it in to your teacher is:
Asking your best friend to write a poem for you and then turning it in to your teacher is:a. copyright infringementb. plagiarismc. both of the above
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09/17/19

I am figuring out how to create the equation
The electric field, E, around a charge q a distance r away is given by E=kqr2Solve the formula algebraically for q  
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09/17/19

steps to show how many pascals and atmospheres is 640 mmhg
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09/17/19

Copper(II) sulfate solution with iron metal molecular equation
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09/16/19

Rust has the formula Fe2O3 and it’s made from iron metal reacting with oxygen over time.
Rust has the formula fe2O3 and it’s made from iron metal reacting with oxygen over time. Assume you had a 2.0 g block of pure metal than fully oxidized to rust and the mass of that product was... more
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09/16/19

Algebra 2 Homework

A student has some $1 bills and $5 bills in his wallet. He has a total of 16 bills that are worth $40. How much of each type of bill does he have?
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09/15/19

Journals that Chemists use? (Chemistry Literature)
List 10 different journals that a chemist may use routinely.
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09/14/19

Calculus Problem

Find an equation of the circle whose center is at (2, -1) and that passes through (4,5).
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09/14/19

Calculus problem

Find the standard form equation of the line passing through (-10,-2) and (4,-8). Make sure that your final answer has only integer values.
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09/14/19

The length of a rectangle is 7 more than the width. The area is 60 square feet. Find the length and width of the rectangle.
MathApplications of quadratic equations
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09/14/19

Chemistry/Physics Question
What is the energy of a photon with a frequency of 280 GHz?
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09/13/19

Chemistry 131 NEED HELP PLEASE
An office heater puts out  (British thermal units) of energy in the form of heat per hour. Given that  how many megajoules of energy in the form of heat can be produced per year (365 days) by the... more
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