Sunday

April 20, 2014

April 20, 2014

Total # Posts: 12

**phy**

A block of mass 2.20 kg is accelerated across a rough surface by a light cord passing over a small pulley as shown in the figure below. The tension T in the cord is maintained at 10.0 N, and the pulley is 0.120 m above the top of the block. The coefficient of kinetic friction ...

**AP Physics B**

Two point charges Q1 and Q2, are located a distance .20 meter apart, as shown above. Charge Q1 = +8.0μC. The net electric field is zero at point P, located .40 meter from Q1 and .20 meter from Q2. Determine the magnitude and sign of charge Q2.

**Chemistry 111**

a)For the titration of an acid analyte with a NaOH titrant, a phenolphthalein endpoint will change from colorless to pink. If the "pink" resulted from perhaps only a half-drop(or less) of NaOH titrant and the Erlenmeyer flask is set aside on the laboratory bench, the...

**chem **

For HCl I got between 3.48 and 5.68 And for CH3COOH I got between 6.20 and 7.16

**Chem 30**

Why can't the Ka for HCl be obtained from a titration curve like that of acetic acid?

**Chem **

Assume the volume of a filter flask is 250.0mL. You have added (25.0 + 10.0)mL of solution so the volume of gas is (250.0 - 35.0) = 215.0mL. Calculate the extra volume of gas forced into the burette because of the measured average temperature of 23 degrees Celsius.

**chemistry**

Ok maybe I didn't understand the question, I guess it doesn't, I just assumed it was a flame test

**chemistry**

when doing a flame test: the hydrated salt is overheated and the anhydrous salt thermally decompose, one product being a gas; will the reported value of x be too high, too low on the unaffected?

**math B30**

nvm i got i thank you so much

**math B30**

i dont understand how you get r?

**math B30**

If the seventh term of a geometric series is 192, and the first term is 3, find the sum of the first 8 terms of the series

**6th grade math**

how do you determine wether a decimal is a terminating decimal or a repeating decimal

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