145 Answered Questions for the topic Chemistry Conversion

Chemistry Conversion Ewq

09/16/15

How many atoms are in 1.97 mol of pure aluminum?

help me answer this please im about to have a mental breakdown
Chemistry Conversion Chemistry

09/08/15

please help me with this chemistry conversion

Convert 92 kwh into calories.... My teacher got 7.9 x 10^4... It's right , but I have no idea how the exponent 4 is there. I just have no idea how my teacher got that . PLEASE HELP. I HAVE A QUIZ... more
Chemistry Conversion

08/26/15

chemistry conversion problem

Ruth palladium bought 10 acres of land and built a house on 2 acres. They wanted to raise sheep on the remaining 8 acres. If it takes 1/8 hectare to raise a sheep, how many sheep can be raised on... more
Chemistry Conversion Word Problem

08/26/15

An office heater puts out 2010 Btus (British thermal units) of energy in the form of heat per hour. Given that 1 Btu = 1.055 kJ, how many megajoules of energy i

The prefix kilo- means 103 and the prefix mega- means 106. Thus, 1 MJ = 103 kJ.
Chemistry Conversion Word Problem

08/25/15

If a bullet travels at 993.0 m/s, what is its speed in miles per hour?

There are 100 cm in a meter, 2.54 cm in an inch, 12 inches in a foot, and 5280 feet in a mile.    I don't remember how to set up the conversion chart. Please help!
Chemistry Conversion

08/23/15

what is 10^-12 in standard form?

I have to write a problem in standard form and give the answer in scientific notation.
Chemistry Conversion

06/29/15

Find the volume in liters of 40 kg of carbon tetrachloride, whose density is 1.60g/cm^3

Find the volume in liters of 40 kg of carbon tetrachloride, whose density is 1.60g/cm^3
Chemistry Conversion

06/03/15

chemistry conversion

The average lethal dose of heroin is 150 mg/kg of body weight. How many grams of heroine would be lethal for a 200 lb man?
Chemistry Conversion

04/09/15

Chemistry needed

027 (part 1 of 3) 10.0 pointsCopper reacts with silver nitrate through singlereplacement. If 3.03 g of silver are producedfrom the reaction, how much copper(II)nitrate is also produced?Answer in... more
Chemistry Conversion

03/13/15

An aspirin tablet contains 81 mg of active ingredient. Calculate the number of tablets that can be made from 105005 kg of aspirin.

Show the formula and the work
Chemistry Conversion

03/12/15

How many atoms are there in 8.56 X 10^-33 moles of NaCl?

Chemistry question, converting moldes to particles. 
Chemistry Conversion Chemistry Lab

03/03/15

why are only four lines visible for hydrogen when calculations show many possible emission lines?

why are only four lines visible for hydrogen when calculations show many possible emission lines?
Chemistry Conversion Science Chemistry Word Problem

02/19/15

A sample of gas under a pressure of 22.0 kPa has a volume of 33.0 cm3. The pressure is increased to 888 kPa, while the temperature remains constant. What v

A sample of gas under a pressure of 22.0 kPa has a volume of 33.0 cm3. The pressure is increased to 888 kPa, while the temperature remains constant. What volume will the gas occupy at this... more
Chemistry Conversion Science Chemistry Word Problem

02/19/15

The pressure exerted by a gas is 45.0 atm while it has a volume of 475350 cm3. What would be the volume of this sample of gas at standard atmospheric pressure?

The pressure exerted by a gas is 45.0 atm while it has a volume of 475350 cm3. What would be the volume of this sample of gas at standard atmospheric pressure?   must show units, and must be... more
Chemistry Conversion

02/18/15

Chemistry help!

A sample of a gas at room temperature occupies a volume of 32.0L at a pressure of 212torr . If the pressure changes to 1060torr , with no change in the temperature or moles of gas, what is the new... more
Chemistry Conversion

02/09/15

How much energy (in J) is lost when a sample of iron with a mass of 26.0 g cools from 76.0 °C to 23.0 °C?

Express your answer with the appropriate units
Chemistry Conversion

02/09/15

How many kilowatt-hours of energy are necessary to heat the air in the house from 9°C to 29°C? The heat capacity of air is 1.03 J/g°C.

A room contains 46kg of air. Express your answer using two significant figures.
Chemistry Conversion

02/09/15

How much heat in joules is required to heat a 50g sample of aluminum from 73°F to 148°F?

Express answer using two significant figures.

Mass of NaOH needed to make 500mL of 0.1M NaOH solution?

I'm working on a solutions lab and would like someone to look over my calculations please.   The question asked: "What mass of solid NaOH is needed to make 500mL of 0.1M NaOH solution?"   My... more
Chemistry Conversion

10/09/14

solve for volume with density and mass given

Mass = 0.0098 x 10-5 mg and density of .879 g/ml what is the volume?  

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