Convert to moles: show work

1. 6.6g (NH4) 2SO4

2. 4.5kg Ca (OH) 2

3. 25g CaO

4. 25g Fe (NO3) 3. 6H2O

5. 25g K2CrO4

Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49x10 to the 14 th power Hz

Carbon dioxide is a colorless odorless gas why is it considered a pollutant? A. it gets into natural waters and kills fish B. it promotes algal growths in natural waters C. it causes respiratory illness in humans D.

A chemist starts with 1.75 g of dactylic acid and excess methanol and calculates the maximum possible yield to be 1.93 g After the reaction run the chemist finds that the amount of methyl salicylate produced and isolated is only 1.

How many acetyl coa molecules may be obtained from oxidation of a 16-carbon fatty acid?

Analysis of a compound indicates that it contains 1.04 grams K 0.70 g Cr and 0.86 g O. Find its empirical formula

Molar mass of Fe2 (CO3) 3

If you put a straw into a glass of water, the straw looks to be bent, although nothing has physically happened to the straw. The term that describes this property of light is A) absorption. B) diffraction. C) reflection. D) refraction.

A constant volume of gas is heated from 25.0ºC to 150.ºC. If the initial pressure was 760. torr, what is the final pressure?

The concentration of 1130 + in a solution is found to be 1.75 X 10-8 M 250C. Find [OH].

W Which are forms of kinetic energy? A light, sound, chemical B electrical, chemical, sound C sound, potential, thermal D light, thermal, sound