Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 12

**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?

**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 ...

**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)

**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)

**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?

**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...

**Precal**

find the minor axis 1x^2+36y^2=1

**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

**Precal**

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

**science**

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

**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...

**Analogy**

Funnel: Tunnel :: (a. bridge b. sack c. ring d. framer) : Cave

Pages: **1**