Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 18

**Chemestry**

How many moles of NaHCO3 are in a 44g sample?

**Science**

B? I'm thinking B because I don't know anything about goldfinches but I do know that C doesn't make much sense. I figure they're born with it so I'm guessing B.

**geometry**

3 because 3+3=6+2+2+2=12

**statistics**

the lenghts of a certain species of fish was found to be normally distributed. the mean lenghts is 77 cm with a standard deviation of 13cm. In a school of 380 of these fish how many would be longer than 64cm

**statistics**

create a survey results that have a sample proportion of 23%

**Chemistry**

Which of the following acid-base indicators should be used for the titration of NH3 with HBr? Kb of ammonia is 1.8 ×10−5. 1. Methyl red, color change red/yellow at 4.4 < pH < 6.2 correct 2. Any of these is suitable. 3. None of these is suitable. 4. Phenolphth...

**Chemistry**

When solid CO2 (dry ice) is allowed to come to equilibrium in a closed constant volume container at room temperature (300K), 1. the pressure rises until it reaches 1 atm 2. the pressure rises until a liquid-gas equilibrium is reached. 3. the pressure does not change. 4. the pr...

**Multivariable Calculus**

Determine the range of a snowball thrown with an initial speed of 6 meters/sec at an angel of elevation of 45 degrees. (Assume g = 9.8 meters/sec) I'm not really sure what I'm supposed to find here, am I supposed to find the horizontal distance or the vertical distance...

**Calculus**

This is going to be pretty hard to show as text since it would be easier for me to post a picture of the question. The question has f(x) = x/4^2 - (2x^3)/4^4 + (3x^5)/4^6 + ... . I am trying to find out the value of f(2). There is a hint to differentiate the power series expan...

**calculus**

Yes, it can take decimal places pretty far, even a rounded answer is still within 1% of the answer I received. So, I am unsure what the problem is, I am still awaiting an email from my professor and TA as to what could be the problem.

**calculus**

The program is on the UT website, and it takes answers within 1% of the actual answer. And that's all to the question.

**calculus**

The problem is to evaluate the integral 10secxtanx dx, from -1/7 pi to 3/8 pi. What I've done so far is evaluated the integral since secxtanx is a trig identity, so the integral of that is secx. I took out the 10 since it was a constant which leaves me with 10[sec(3/8)pi -...

**chem**

.0111/2= .00555

**Thermochemistry**

When 1.477 mole of an inorganic salt were dissolved in 1.00 L of water in a constant pressure solution calorimeter, the temperature of the calorimeter changed from 25.00oC to 24.40 oC. The total heat capacity of the calorimeter including all its contents was 2.18 kJ oC-1 What ...

**math**

formular for compound and simple intrest

**10th grade honors algebra**

I can't figure out how to simplify this: 3x/2 + 3 - x

**algebra**

I can't figure out how this is simplified. 3x/2+3-x can you help?

**Chemistry**

In the reaction KNaC4H4O6 + H2O + COCl2 * 6H2O ¨ what r the products? and is the tartrate ion the catalyst?

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