Saturday

April 19, 2014

April 19, 2014

Total # Posts: 12

**geometry**

Please help me to draw this figure four points that are not collinear,three points that are non-collinear,two points that are non-collinear,three points that are non-coplanar,a line containing A and X, three collinear points X,Y,Z, a plane containing points P and Q, a points S...

**Science**

Is genetic engineering the answer to ending global hunger?

**Calculus**

Prove that (2,0) is the closest point on the curve x^2 + y^2 = 4 on (4,0.

**Calculus**

To estimate the height of a bridge, a man drops a stone into the water below. How high is the bridge (a) if the stone hits the water 3 seconds later? (b) if the man hears the splash 3 seconds later? (1080 ft per second for speed of sound)

**math**

1559 9 plas

**2nd Grade**

1559

**Chemistry- Empirical Formula**

Shouldnt that 6.63 mg be converted to grams before using that formula to get g hydrogen?

**Chemistry- Empirical Formula**

I'm a little confused about how to convert 6.63 mg H2O to mg H. And calculating mg C as well.

**Chemistry- Empirical Formula**

@DrBob222 Yes it is part of the same problem

**Chemistry- Empirical Formula**

Aniline, consists of C, H, and N. Combustion of such compounds yields CO2, H2O, and N2. If the combustion of 9.71 mg of aniline yields 6.63 mg H2O and 1.46 mb N2, what is the empirical formula? What is the molecular formula of a compound with the molecular weight of 372.504 am...

**Chemistry - Heat Calculations**

Calculate the heat released when 4 L Cl2 with a density of 2.46 g/L at 25 degrees C reacts with an excess of sodium to form solid sodium chloride at 25 degrees C.

**Chemistry - Balancing Equations**

Balance the following: Ca(OH) + H2SO4 -----> CaSO4 + H2O Na2S2O3 + I2 -----> 2NaI + Na2S4O6 ZnCl + Na2S -----> ZnS + NaCl SnCl4 + H2O ----> SiO2 + 4HCl I figured out the 2nd and 4th one to be: 2Na2S2O3 + I2 -----> 2NaI + Na2S4O6 SnCl4 + 2H2O -----> SiO2 + 4HC...

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