Chemistry Homework Help

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Dimensional Analysis

#### Q. Test on human subjects along the East Coast of the United States in 1965 and 1966, following the era of atomic bomb testing, revealed quantities of about 1.31 pCi of plutonium radioactivity (alpha radiation) in a test subject. How many disintegrations per second does this level of activity imply? Express your answer numerically in disintegrations per second.

Solved • May 1, 2020

Dimensional Analysis

#### Q. Using a 100-mL volumetric flask, how do I prepare an aqueous solution containing 15g/L of the unknown solid acid

Solved • Apr 26, 2020

Dimensional Analysis

#### Q. A 85.0-kg person is exposed to 389 rad of radiation. How many joules did this person absorb? Express your answer numerically in joules.

Solved • Mar 17, 2020

Dimensional Analysis

#### Q. Convert 380 torr to kilopascals. A. 50.7 kPa B. 2.64 kPa C. 38.5 kPa D. 85.4 kPa E. 5.07x10^4 kPa

Solved • Apr 3, 2020

Dimensional Analysis

#### Q. A 85.0-kg person is exposed to 629 rad of radiation. How many joules did this person absorb? Express your answer numerically in joules.

Solved • Mar 15, 2020

Dimensional Analysis

#### Q. Ice actually has negative caloric content. How much energy, in each of the following units, does your body lose from eating (and therefore melting) 77 g of ice? Heat of fusion for water is 6.02 J/mol Express your answer in calories (1 cal = 4.18 J). Express your answer in nutritional Calories or capital "C" Calories (1000 cal = 1 Cal).

Solved • Mar 30, 2020

Dimensional Analysis

#### Q. The pressure 30.0 meters underwater is 396 kPa. Conversion factors 1 kPa=9.869×10−3atm. 1atm=760mmHg. What is this pressure in atm?

Solved • Mar 28, 2020