Friday

October 9, 2015
Total # Posts: 14

**Algebra**

Help? The school john goes to is selling tickets to the annual dance competition . On the first day of sales the school sold 2 senior citizen tickets and 13 student tickets for a total of $108. The school took in$144 on the second day selling 4 senior tickets and 14 student ...
*October 20, 2014*

**Science - chemistry**

The osmotic pressure of a solution of MgCl2 is 5.43 atm at 25 oC. How much of the salt is dissolved in 250.0 ml of water?
*June 8, 2014*

**Science - chemistry**

The SO2 present in air is mainly responsible for the phenomenon of acid rain. The concentration of SO2 can be determined by titration against a permanganate solution of known concentration as follows: SO2 + MnO4^-1 -> SO4^-2 + Mn2+ (unbalanced) Balance the equation showing ...
*June 8, 2014*

**Science - chemistry**

Calculate the volume of 0.05 M NaOH which must be added to 100 cm3 of 0.05 M methanoic acid to obtain a buffer of pH 4.23.(Ka for methanoic acid = 1.77 x 10-4)
*June 6, 2014*

**Science - chemistry**

Calculate the pH of a solution prepared by adding 36 cm3 of 0.15 M methanoic acid to 27 cm3 of 0.20 M NaOH.(Ka for methanoic acid = 1.77 x 10-4)
*June 6, 2014*

**Physics**

An 80 kg man is put into a tank of water. When completely submerged he displaces 75 L of water. If fatty body tissue has an average density of 0.9 kg/L and non-fatty body tissue has an average density of 1.1 kg/L, what percentage of the man is composed of fat?
*May 28, 2014*

**Physics**

A jet engine produces a sound level of 150 dB from a distance of 30 m (assuming spherical dissipation). The average human ear has an effective area of 12.0 cm2. What is the sound level at 60 m from a jet engine is? What would the power intercepted by an unprotected ear at 60 m...
*May 27, 2014*

**Precal**

find the minor axis 1x^2+36y^2=1
*November 29, 2013*

**Precal**

Find all values of x such that x-6, x+6, and 10 x -6 form a geometric sequence. Give your answers in increasing order
*November 29, 2013*

**Precal**

Find x such that -8 x - 3, 3 x - 1, and 2 x + 49 are consecutive terms of an arithmetic sequence. x=?
*November 29, 2013*

**Chemistry**

Reduction half-reaction for 2Li(s)+2H+(aq)→2Li+(aq)+H2(g).
*November 21, 2011*

**science**

what can an element's osition in the periodic tabletell you about it's relationship to other elements in the periodic table?
*November 2, 2010*

**trig**

Yea, but it isn't the entire circle so a circle area formula won't work. The equation for this area will be A= (1/2)r*Given Angle...
*March 3, 2010*

**Analogy**

Funnel: Tunnel :: (a. bridge b. sack c. ring d. framer) : Cave
*January 30, 2008*

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